Electronic Over Current Relays

Transcription

1 Electronic Over Current Relays Electronic Over current Relays Electronic Under current Relays Electronic Voltage Relays Other & Monitoring Devices Current Transformers

2 General Information Company History 98 SAMWHA Engineering Co., Ltd incorporated 988 SAMWHA R&D Center established 990 The 2nd factory completed in Iksan, Korea 990 Recognized as the Advanced Technology Small& Medium Sized Company by the Korean Ministry of Trade and Industry 993 SAMWHA Electric(Tianjin)Co., Ltd. established in Tianjin, China 994 SAMWHA Electronics (Beijing)Co., Ltd. established in Beijing, China 995 SAMWHA R&D Center building completed in Eumsung, Korea 996 SAMWHA Engineering (Vietnam) Co., Ltd. established in HCMC, Vietnam 997 Reach to 5millions of EOCR production 997 ASIC(Application Specific Intergrated Circuit) Chip Developed 997 Registered to KOSDAQ(Registered No. 507) 999 Approved to New Technology by Korean Government for ASIC Chip Applicable EOCR3D&FD Series Product(Registered No. 5) 200 Recognized Export Leading Company by Korean Government 2002 SAMWHA EOCR Ltd. Established TQCS Quality System Total Quality Customer s Satisfaction Domestic Awards 985 The Presidential Prize of 85 National Invention Awards 986 The Ministerial Prize of National Invention Promotion Awards The KYUNGHYANG Energy Prize The Ministerial Prize of Korea Electronics Exhibition The Golden Prize of 86 National Invention Awards 989 The Order of Industrial Service Merit The Grand Prix of 89 National Invention Awards 990 The Bronze Prize of 9 National Invention Awards 99 The Venture Company of The Electric Industry Development Prize of KOMA The Order of Industry Service Merit 995 The Tower of Export 998 UN WIPO Prize 999 The Order of Industrial Service Merit International Awards 989 The Silver Medal of INPEX Pittsburgh 990 The Silver Medal of Geneva International Invention Award 992 The Golden Medal of De LInvention De Paris 993 The Bronze Medal of Beijing International Award 998 The Golden Medal of IENA98. Germany Worldwide Service Network Reliability & Safety UL CE ABS SEV KR CCS TÜV CSA RINA Approved Underwriters Laboratories Inc Community European American Bureau of Shipping Association Suisse Des Electriciens Korean Register of Shipping China Classification Society TÜV Germany Canadian Standards Association Registro Italiano Navale EOCR SS Approved by BM TRADA(U.K) Approved Date ISO 900 Certificate ISO 900 Certificate EOCR SP EOCR DS EOCR 3D EOCR FD EOCR EOCR PMZ PFZ EVR Intellectual Property Item Domestic Overseas Register Applied for No Register Applied for No Total Patent Utility Model Design Trade Mark Total

3 Over Current Relay Option. Looping (Protect smaller current by looping option) Some motor size may require onethird or onefourth of particular EOCR current range. These installations can be accommodated by looping the motor wire 2 or 3 times through the integral current transformers of the EOCR. This reduces the number and type of relays inventoried for spare purposes. Each additional loop will increase the current measured as indicated by the following chart. Type Looping Option Current Setting Range(A) 0.5 ~ ~ ~ ~ ~.20 Time of Passing (#) No. of Loops (#) 0Fig Fig Option2. External Current Transformer Option (Ext. CT option protect bigger current) Ordering option type of each model fitted to an external current transformer can achieve higher ampere ranges. Type 60 Type Ext. CT Option Current Setting Range(A) 0.5 ~ ~ ~ 20 5 ~ ~ ~ 360 Current Ratio of Ext. CT NIL NIL 00 : 5 50 : : : 5 StraightthroughWiring looping Option ( 2Loop ) Fig Fig 2 External 3CT Option External SRCT Option EOCR Type Table for 3phase Motor Current Setting Range (Adjustable) (A) 0.5 ~ ~ 60 0 ~ ~ ~ ~ ~ ~ 720 AC220(V) kw HP Capacity of 3 Phase Motor (kw/hp) Current (A) AC380/440(V) kw HP Current (A) 4.2 / / / / / / / / 520 TYPE 60 00: 200: 300: 400: 500: 600: Cable Size Thickness Allowable () Current(A) ~ Remark Builtin CT(Standard type) Assemble with External CT EOCR Setting Patlem / Motor Running Current (3DD & FD Series)

4 Over Current Relay Overview DTIME(Delay Time): When starting the motor, its current is increasing 5 to 8 times of rated current and its starting time is different according to the load of motors. DTime knob(mode) has a function to delay the trip during starting period even if starting current exceeds over preset overcurrent value. OTIME (Operating Delay Time): When EOCR senses overcurrent which exceeds over preset overcurrent range. OTime knob(mode) delays trip until EOCR trips after detecting overcurrent during running period. In case of Definite type, Overcurrent protection is provided by the relay tripping when motor operating current(in) exceeds EOCR current setting(is) for a period greater than preset trip time(otime), while Inverse type shows that Overcurrent protection is provided by the relay tripping according to the TimeCurrent Characteristic Curve. RESET Depressing the RESET button or interrupting power supply resets the relay immediately. Depress the RESET button on the facia for manual reset. Electrical Reset can be achieved by interrupting power supply in remote area. Auto Reset can be achieved automatically according to RTime setting. Auto reset function is selectable by using mode switch. EOCR with fixed auto reset time or adjustable auto reset time is applicable. TEST It has function to check and confirm the status of the motor by depressing the TEST button on the facia. To keep depressing the TEST button makes relay trip after the elapse of DTime and/or OTime. Once TEST is done, then reset the relay by depressing RESET button. The test function of Digital EOCR with 7 Segment Display cannot be performed during motor running, but possible when motor is stopped. N Type ( Failsafe Mode / No Volt Release ) NVR(No Volt Release)/On(N Type) Failsafe R type ( NonFailSafe Mode ) NVR(No Volt Release)/Off (R Type) NonFailsafe The output of relay is normally energized with control power applied. It is called NVR (No Volt Release) function and recommended to use output mode for safe protection. It is selectable by DIP switch or FS Mode In all case, the failure of the control voltage may not interrupt the process. It is selectable by DIP switch or FS Mode Caution) NVR function is designed to offer more accurate protection for motor. The motor can not start in case there is no power supply to EOCR or the span of life of motor is gone through. It is able to find the problem in its process in advance. Caution) In case of NonFailSafe mode, periodical checking is required in case there is abnormal power supply to EOCR or the span of life of motor is gone through. 2

5 Digital EOCR Classfication EOCR3DE Series EOCR3M Series Model Wiring Mount Model Wirethrough Terminal Flush Mounting Panel Mounting Undercurrent Locked Running Rotor Starting Phase Reversal Phase Unbalance Ground Fault Short Circuit Alert Output Trip Cause Memory Trip Cause Display Display Running Time Memory & Setting BarGraph Current Signal Output Setting SW. Type Ground Fault Current Sensing Contacts Rating Basic Type Overcurrent Use external CT Mode Rating Control Voltage (50/60Hz) 3DE 0.5~60A ~960A(0:5~800:5) 0.5~less than preset O.C / OFF 0.5, ~0sec Within 0.5sec after DTime Within 3sec 0.~0.3sec Within 8sec A:0.02~3A, B:0.2~0A A/F/H/U Last 3 Trip Cause 4Digit 7segment Button SW. Zero Phase Current O.L:2SPST(ab) O.L:SPST(a) AL:SPST(a) GR:SPST(a) 3A/250VAC, Resistive, 220VAC5%, 0VAC5% 3EZ 3DM 3MS 3MZ : ~0A, 60: 5~70A A/F/H O.L:2SPST(ab) AL:SPST(a) : ~0A, 20: 5~20A O.L:2SPST(ab) S.C:SPST(a) : ~0A, 60: 5~70A ~960A(0:5~800:5) 0.5~less than preset O.C / OFF ~0sec Within 0.5sec after DTime Within 3sec 0.sec Within 8sec A:0.03~2.5A, B:0.2~0A 0.sec Last Trip Cause 5Digit 7segment Rotary SW & Button SW. Zero Phase Current O.L:SPST(a) GR:SPST(a) 3A/250VAC, Resistive, 85~250VAC/DC 3M42 : ~0A, 6 4~20m O.L:2SPST Panel Mounting / Flush Mounting makes it easier for use. Digital Ammeter is installed at the front cover of panel door in Flush Mounting type. It makes possible to check sensing current and finding the cause of trip with tripped current easily, to set current and Otime by simple button selection without removing unit from panel. Panel Mounting type with Digital Ammeter is installed inside the MCC panel and Just Operator is Possible to adjust it. Following conditions should be considered in case of installing EOCR. Overcurrent & must be included as basic protective function in the point of view for its law and regulation. Earth leakage current protection must be added against moisture and humidity conditions. In case you need to sense the overload increasing, Alert function must be added. If you need to confirm the current of many motors in one place, Current signal output transducer function (4~20mA) must be added. Short Circuit protection must be added if you protect line damage caused by Short Circuit. EOCR with 3CT is recommended to not only 3 3w, but also 3 4w condition. Window / Terminal makes it easier for installation. Wire is passing through CT without cutting, that is much easier for installation. It has also more convenient application to external CTs. As for Terminal type, display part is Flush Mounting type but Converter is Panel Mounting type with its application less than 60Amp. The same diameter of Digital Ammeter to conventional Analogue Ammeter makes it easier for installation. Ammeter Selector S/W is not necessary as 3 phase current is displayed L, L2, L3 in order every 5 seconds. It is easy to install Ammeter by using cap cover and it saves install time. Alert Output Mode A( Ampere Relay ) : Energized when sensing current F( Flicker ) : Flicker H(Holding ) : ONOFF output mode U( Under Current Mode ) : ALoupput is transferred to UC (3DD/FD vesion E) EO MC Re Ov Un Tim 0.5 UC OFF Dig / Tri Tri Ma Th Fit Re 3

6 Solid State Overlo EOCRFDE Series EOCRFM Series EOCRP Seri Terminal 0 FDE FEZ FDM FMS FMZ FM420 PMZ Terminal (Display) (Display) (Display) (Display) (Display) (Display) (Converter) (Converter) (Converter) (Converter) (Converter) (Converter) 0: 5~70A 0.5~60A : ~0A, 60: 5~70A : ~0A, 20: 5~20A : ~0A, 60: 5~70A : ~0A, 60: 5~70A ~60A ~960A(0:5~800:5) ~960A(0:5~800:5) ~3600A(0:5~ ~less than preset O.C / OFF 0.5~less than preset O.C / OFF 0.5~less than preset O. 0.5, ~0sec ~0sec OFF/0.~0sec/Adju Within 0.5sec after DTime Within 0.5sec after DTime Within 0.5sec after D Within 3sec Within 3sec Within 3sec 0.~0.3sec 0.sec 0.~0.3sec Within 8sec Within 8sec Within 8sec A:0.02~3A, B:0.2~0A A:0.03~2.5A, B:0.5~0A Definite: 0.03~0A, Invers 0.sec 0.03~0.sec A/F/H/U A/F/H Last 3 Trip Cause Last Trip Cause Last 3 Trip Caus 4Digit 7segment 5Digit 5Digit A 4~20mA 4~20mA Button SW. Zero Phase Current Rotary SW. & Button SW. Zero Phase Current Button SW. Zero Phase Curre (ab) O.L:2SPST(ab) O.L:SPST(ab) O.L:2SPST(ab) O.L:2SPST(a) O.L:SPST(a) O.L:2SPST(ab) OL/SH : 2SPST(a AL:SPST(a) GR:SPST(a) AL:SPST(a) SC:SPST(a) GR:SPST(a) GR : SPST(a 3A/250VAC, Resistive 3A/250VAC, Resistive 3A/250VAC, Resis, 220VAC5%, 0VAC5%, 85~250VAC/DC, 85~250VA CR3DE/FDE U Based al Time Processing / Higher Precision ercurrent Range: 0.5~60A, Wide Range (Use with external CT from to 960A, Direct application without CT up to 60A) dercurrent Range: 0.5~59A / OFF (Use with external CT less than 960A) e Characteristic for Overcurrent ~0A : Definite / Inverse Selectable, Over A : Definite(Use with external CT in case using Inverse time) Coutput is used as common to OCoutput. When choosing Uin ALo mode, ALmode becomes () and AL output ( 0708 ) is transferred into Undercurrent (UC) output mode automatically. ital display / 3 Phase Current Display: Digital Ammeter (Every 5 seconds) pped Cause Digital Display: Easy Troubleshooting p Cause Memory: Last 3 trip check function. Possible to check with tripped trip cause and current nual / Electrical Reset e tripping relay is normally energized with control power supply. (Selectable) to a variety of environment as Terminal & Window type. sistive Strengthened against variable freguency device such as inverter : 20~400Hz. 4

7 erload Relay EOCRSSD Digtal OverCurrent Relay Series PFZ (Display) (Converter) A 5~3000:5) set O.C / OFF /Adjustable fter DTime sec sec sec nverse: 0.03~A 5sec Cause t ma SW. Current ST(ab) ST(a) Resistive 250VAC/DC Overcurrent Setting Reset Operating tc characteristic Tolerance Environment Control Power Contact Rating Insulation Dielectric Strenghth Installation Overcurrent Locked Rotor Current Starting delay time Trip time Temperature Humidity OTime 3sec 0.5sec after elapse dt DTime OTime Between casing and circuit Between casing and circuit Between open contacts between circuit Overcurrent Current Time Operation Store 2SPST Description IsIn [(MAX MIN) / MAX] times OC setting value 0.5 ~ 6A 3 ~ 30A 0 ~ 60A ~ 30sec 0.5, ~ 0sec Manual / Electrical Definite I<A : 0.A, I A : 5% t 3S : 0.2s, t>3s : 5% 20~60 30~80 30~85% RH noncondensing 0 : 0VAC5%, 50/60Hz 220 : 220VAC5%, 50/60Hz 440 : 440VAC5%, 50/60Hz 24 : 240VACDC 3A / 250VAC, Resistive Over 0, DC500V 2000VAC 60Hz, min 000VAC 60Hz, min 2000VAC 60Hz, min 35mm Din Rail or Panel Mounting MCU(Micro Controller Unit) based / 2CT Type Real Time Processing / Higher Preceision Current Setting Renge Type : 0.5 ~ 6A / 30Type : 3 ~ 30A / 60Type : 0 ~ 60A Digital display : trip cause / easy troubleshooting Reset : Manual (instantaneous) / Electrical (remote) Load selection by DIP switch : Single phase(p) / Three phase(3p) Fail safe(n) / Nonfail safe(r) 5

8 Electronic Overload Relays Compact Design Multiple Functions Wide Current Adjustment Range (0:) Ammeter Function Trip Indication LED High Accuracy Manual Instantaneous Reset Electrical Remote Reset Test Function Ambient Insensitive Low Energy Consumption Failsafe Operation (No Volt Release) Overcurrent Overcurrent protection is provided by tripping the relay when motor operating current (In) exceeds overcurrent setting (Is) of EOCR for a period greater than the preset operating time (OTime). Wide Adjustment Range EOCR has a wide current adjustment range of over 0:. It enables three type models to cover a wide range from 0.A up to 600A thus reducing the number and type of relays that must be inventoried for spare purposes. Looping Option Some motor size may require only onethird or onefourth of particular EOCR current range. These installations can be accommodated by looping the motor wire 2 or 3 times through the integral current transformers of the EOCR. This reduces the number and type of relays inventoried for spare purposes. Each additional loop will increase the current measured as indicated by the following chart. Type Looping Option No. of Loops Time of Passing Current Set. Range(A) A A A 0.2.5A 0.0.2A EOCRSS 2 Integral Current Transformers Electronic Shearpin Function Independently Adjustable Starting Trip Delay (DTime) & Operating Time (OTIME) During a phase loss, the motor winding current may increase by 50% or more. As the motor winding current increases, the winding temperature may also increase and possibly damage the winding insulation. The quick trip time on EOCR helps to prevent overcurrent damage to the windings. StraightthroughWiring Ext. CT Option Type Current Ratio of Ext. CT 00:5 200:5 300:5 400:5 500:5 600:5 Looping Option(Loop) External Current Transformer Option Ordering option type of each model fitted to an external current transformer can achieve higher ampere ranges. (Ext. CT Option) Current Setting Range 0.5 6A 0 20A A A A A A Overcurrent Locked Rotor Current Setting Type ~ (over 60A) Time Start DTIME Setting Trip OTIME Control Voltage 24 (50/60Hz) Contact Rating Mode Rating Status TimeCurrent Characteristic Operating (Trip) Indication Mount Operating (Trip) Time OTIME OTIME OTIME + DTIME Range 0.5 6A 3 30A 5 60A Ext. CT Option sec sec VAC VAC SPDT(C) 3A/250VAC Resistive Normally Energized Definite 2LED 35mm Dinrail / Panel Ammeter Function & Trip Indication Indication LED on the dial plate provides trip indication and ammeter functions. The LED starts to flash at the point where motor current is equal to current setting level (Is), so user can verify motor current by reading the LOAD adjustment scale on the dial plate. This also provides an accurate current setting. The LED is illuminated when motor current exceeds current setting (Overload Status). After tripping has occurred, the LED stays on until the relay is reset. The trip indication is also an important feature of a multiple relay & contactor (starter) installation. External CT Option Manual Instantaneous Reset Pushing RESET button on the dial plate or interrupting power supply provides a manual instantaneous reset. Electrical remote reset is also provided by the panelmounted RESET button. Low Energy Consumption EOCRSS uses only 250mA of power, much less than thermal bimetallic overload relays. The result is significant cost savings over the life of relays (over 20 times cost saving). 6

9 Solid State OverCurrent Relay EOCRAR EOCRDS EOCRSP 2 Integral Current Transformers Automatic Reset and Adjustable Reset Timer 3 Integral Current Transformers Electronic Shearpin Function Independently Adjustable Starting Trip Delay (DTime) & (OTIME) EOCRDS + Power Terminal Kit EOCRDST 2 Integral Current Transformers Fit Directly into IEC or NEMA Contactor Overcurrent Locked Rotor Operating (Trip) Time OTIME OTIME OTIME Overcurrent Locked Rotor Operating (Trip) Time OTIME OTIME OTIME + DTIME Overcurrent Locked Rotor Operating (Trip) Time OTIME OTIME OTIME + DTIME Current Setting Type ~ (over 60A) Time Start DTIME Setting Trip OTIME Control Voltage 24 (50/60Hz) Contact Rating Mode Rating Status TimeCurrent Characteristic Operating (Trip) Indication Mount Range 0.5 6A 3 30A 5 60A Ext. CT Option sec sec VAC VAC SPDT(C) 3A/250VAC Resistive Normally Energized Definite LED 35mm Dinrail / Panel Current Setting Type ~ (over 60A) Time Start DTIME Setting Trip OTIME Control Voltage 24 (50/60Hz) Contact Rating Mode Rating Status TimeCurrent Characteristic Operating (Trip) Indication Mount Range 0.5 6A 3 30A 5 60A Ext. CT Option sec sec VAC VAC 2SPST 3A/250VAC Resistive Normally Energized Definite 2LED 35mm Dinrail / Panel Current Setting Type Setting OTIME Control Voltage 24 (50/60Hz) Contact Rating Mode Rating Status TimeCurrent Characteristic Operating (Trip) Indication Mount Range 0.3 2A 2A 5 25A sec VAC VAC SPDT(C) 3A/250VAC Resistive Normally Energized Definite 2LED Contactor Mounted 7

10 EOCRSS / SP / DS Series Compact Design MCU Based Multiple Functions Wide Current Adjustment Range (0:) Ammeter Function & Trip Indication Easy Troubleshooting & Run Monitor Manual Instantaneous / Electrical Remote Reset Test Function Ambient Insensitive Failsafe Operation EOCRSS / SS2 Run Monitor & Troubleshooting with 2LED s 2 LED Lamps on the dial plate provide easy troubleshooting and runmonitor functions 2 Integral Current Transformers Independently Adjustable Starting Trip Delay & Overcurrent Locked Rotor Time Characteristic SS OTIME(curve) 4 sec DTIME Inverse EOCR Operating (Trip) Time SS2 OTIME 4 sec DTIME Definite TimeCurrent Characteristic Curve Definite Time Characteristic of EOCRSP2/SS2/DS2(T)/DS3(T) EOCR Current Setting ~ (over 60A) Time Start DTIME Setting Trip OTIME Control Voltage 24 (50/60Hz) Contact Rating X Mode & Rating Status X2 Mode & Rating Status TimeCurrent Characteristic Trip & Trip Cause Indication Mount SS SS A 0.5 6A 3 30A 3 30A 5 60A External CT Option 0 50 sec 50 sec sec 85 50VAC VAC SPST, 3A/250VAC Resistive Normally Energized SPDT, 3A/250VAC Resistive Normally Deenergized Inverse Definite 2LED 35mm Dinrail Inverse Time Characteristic of EOCRSP Inverse Time Characteristic of EOCRSS/DS(T) 8

11 MCU Based OverCurrent Relay EOCRDS / DS2 / DS3 EOCRSP / SP2 3 Integral Current Transformers Independently Adjustable Starting Trip Delay & EOCRDS/2/3 + Power Terminal Kit = EOCRDST/2T/3T 2 Integral Current Transformers Fits Directly into IEC or NEMA Contactor Overcurrent Locked Rotor Phase Reversal Time Characteristic DS(T) OTIME(curve) 4 sec DTIME Inverse EOCR Operating (Trip) Time DS2(T) OTIME 4 sec DTIME Definite DS3(T) OTIME 4 sec DTIME 0.sec Definite Overcurrent Locked Rotor Time Characteristic SP OTIME(curve) 4 sec OTIME+0 sec Inverse EOCR Operating (Trip) Time SP2 5 sec 4 sec DTIME Definite EOCR Current Setting ~ (over 60A) Time Start DTIME Setting Trip OTIME Control Voltage 24 (50/60Hz) Contact Rating Mode Rating Status TimeCurrent Characteristic Trip & Trip Cause Indication Mount DS(T) DS2(T) DS3(T) 0.5 6A 0.5 6A 3 30A 3 30A 5 60A External CT Option 0 50 sec 50 sec sec 85 50VAC VAC 2SPST 3A/250VAC Resistive Normally Energized Inverse Definite Definite 2LED 35mm Dinrail EOCR Current Setting Time Start DTIME Setting Trip OTIME Control Voltage 24 (50/60Hz) Contact Rating Mode Rating Status TimeCurrent Characteristic Trip & Trip Cause Indication Mount SP SP A 03.2A 2A 2A 5 25A 5 25A 0 sec(fixed) 50 sec 0 5 sec(fixed) 85 50VAC VAC 2SPST 3A/250VAC Resistive Normally Energized Inverse Definite 2LED Contactor Mounted 9

12 EOCR3DE/FDE Series Compact Design 3DE/3EZ : Panel Mounting Type FDE/FEZ : Panel Flush Mounting Type MCU(Microprocessor Control Unit) Based 3 Integral Current Transformers Multiple Functions Digital Ammeter Troubleshooting / Trip Cause Memory, Display Adjustable Operating by Mode switch Wide Current Adjustment Range Selectable TimeCurrent Characteristics (Inverse / Definite) Manual (Instantaneous) / Electrical (Remote) Reset Test Function Ambient Insensitive Selectable Failsafe and Nonfailsafe Operation Modes Comparison Table of Model EOCR Over current Under current Phase Unbalance Phase Reverse Locked Rotor Ground Fault Run Monitor & Load Alert Function Selectable Alerting Pulse Feature Function Overcurrent Undercurrent tc Uc mode de (Definite TC) In (Inverse TC) Definite TC 3DE / FDE 3EZ / FEZ Description This is provided by the relay tripping when motor operating current(in) exceeds current setting value in oc mode for a period greater than the preset trip time(otime in ot mode)(curve2) This is provided by the relay tripping when motor operating current(in) exceeds current setting value in oc mode according to the Timecurrent Characteristic Curve(Curve) This is provided by the relay tripping when motor operating current(in) is lower than current setting value in uc mode for a perid greater than the preset trip time(time in ut mode) Looping Option Smaller ampere ranges than particular EOCR current range can be covered by looping the motor wire 2 or 3 times as under described. 0.5 Type Looping Option Type wide Range 0 : 5 5 : : 5 No of Loops Value in CT mode OFF() Current Ratio of Ext. CT Current Setting Range (A) External CT Option Higher ampere ranges can be achieved by setting in CT mode fitted to an external current transformer, and the actual motor current display is possible in any case Alert Function When motor operating current (In) exceeds the alert setting (As), the alert relay outputs three kind of signal. The output can be used to warn customers/operators of possible overloading and avoid unnecessary motor shutdown. The type of output signal is decided by the selection in the Alo mode A (Ampere relay): energized whenever CT senses a current F (Flickering): character A and current value flashs frequently H (Holding): ONOFF U (Undercurrent mode): the AL output(0708) is transferred into Uc output Running state Setting ALo Flicker F Hole H Aux A Normal 2 sec Current Setting Range (A) 0.5 ~ 60A ~ 2A.5 ~ 8A 80 ~ 960A More then preset(%) of Alert Looping Option (Loop) EOCR3DE+External CT Trip PL On The relay will be operated within 3 sec. When the phase failure occurs In = Motor Operating Current / Is = EOCR Overcurrent Setting / As = Alert Setting Phase Unbalance Phase Reversal Ground Fault Ub RP Ec 5~50% On Off() 0.03~3A This is provided by the relay tripping in phase unbalance greater than setting % difference in terms of maximum phase current : [(MAXMIN)/MAX]00[%] In the event of phase reversal, the relay trips in 0.sec Phase reversal protection function is disabled : this allows the relay to be used for reversing application Ground fault protection is provided by the relay tripping accoding to zero sequence current sensed by ZCT Failsafe & Nonfailsafe The tripping relay can be operatcd in a failsafe or nonfailsafe mode Application of the Failsafe (Electrically Held) Connection Faie safe setting in FS mode : ON The tripping relay is normally energized with control power supply Application of the Nonfailsafe Connection Fail safe setting in FS mode: OFF() In all cases, the failure of the control voltage may not interrupt the process. Locked Rotor Stall Lc Sc 2~0 Times OC.5~5 Times OC This is a protection for locked rotor in starting state. The variable setting range is 2~0 times oc setting value, but maximum setting value is limited in case oc setting value is greater than 0A. The maximum setting value is calculated by [00/oc setting value] This is a protection for locked rotor while motor is working. The variable setting range is.5~5 times oc setting value, but the maximum setting value is limited in case oc setting value is greater than 20A, The maximun setting value is calculated by [00/oc seting value] FS:ON (Fail safe) FS (OFF) (NonFail safe) Control power on Ralay Trip TC : TimeCurrent Characteristic 0

13 Digital Over Current Relay LED Display Examples of Trip Cause Indication Overcurrent Trip Relay displays a trip, caused by overcurrent. which has been detected from phase L(R/T). Undercurrent Trip Relay displays a trip, caused by undercurrent. which has been detected from phase L2(S/T2). Digital Ammeter 3 phase motor currents (In) / Ground fault current are displayed in sequence on the LED display. 3DE/FDE Trip Relay displays a trip, caused by phase loss (Phase Failure) on Phase L2(S/T2) Phase Reversal Trip Relay displays a trip, caused by phase reversal. Phase Unbalance Trip Relay displays a trip, caused by phase unbalance. in phase L(R/T). Ground fault Trip : EOCR3DZ/FDZ Only Relay displays a trip, caused by ground fault current Locked Rotor Trip Relay displays a trip, caused by locked rotor. during starting state 3EZ/FEZ Locked Rotor Trip Relay displays a trip, caused by locked rotor. while motor is working TimeCurrent Characteristic Curve Rotation display of Phase current Instead of automatic rotation, manual display rotation is possible as depressing once SET/Store button during an operation. If manual is selected, the information of phase current L is displayed firstly and next information is displayed continuously like a manner of LL2 L3(GR)L whenever depress SET/Strore button evey once Digital Trip Cause Indication / Easy Troubleshooting Enter into trip mode by depressing once Set/store button, then last trip cause is showed Each phase current is displayed in order whenever depress UP/DN button in every once under trip mode The 2nd trip cause is showed after displaying 3phase current of last trip The 3rd trip can be checked by same manner Test This is the selftest of this product. If the relay enters into this mode, it begins to count down preset value of Otime after waitng 3sec and becomes trip state as showing END message that means this relay is ready to work. END message of this test is also stored in Fault mode as last trip. Not permitted to test this function during the operation to prevent unnecessary trip Reset Depressing the RESET button or interrupting control power resets the relay immediately. Electrical remote reset is also available through the panel mounted reset switch. Curve Inverse (SW3INV/On position) Curve2 Definite (SW3DEF/Off position) OT Setting (Curve) IEC 9474 (Trip Class) 0A

14 EOCR3DE/3EZ MCU Based 3 Integral Current Transformers Overcurrent, UnderCurrent,, Phase Unbalance, Phase Reversal, Locked Rotor Digital Ammeter & Trip cause indication Selectable Current Characteristics Independently Adjustable Starting Trip Delay and Operating + Load Alerting Function EOCR3DE + Ground Fault EOCR3EZ EOCR3DE / 3EZ EOCR3DE Overcurrent OTIME Undercurrent 0.5~30 sec 3 sec Phase Unbalance 8 sec Phase Reversal 0.~0.3 sec Locked Rotor DTIME Overcurrent Undercurrent Phase Unbalance Phase Reversal Locked Rotor Ground Fault EOCR3EZ OTIME 0.5~30 sec 3 sec 8 sec 0.~0.3 sec DTIME 0.~0 sec Model Over Current Setting Range Ground Fault Current Setting Alert Setting Start Delay Time Setting (DTIME) Trip Delay Time Setting (OTIME) INV DEF Control Voltage Contact Rating OL AL/GR Rating Time Characteristic In/ tc mode de/ tc mode Troubleshooting / Trip Indication Current Sensing Mounting EOCR3DE EOCR3EZ Refer Table # A: 0.02 ~ 3A / B: 0.2~0A 50 ~ 00% / OFF ~ 200 sec ~ ~ 30 sec, 0VAC5%, 220VAC5% 2SPST SPST AL Relay Ground Fault Relay 3A/250VAC Resistive Inverse (See Curve) Definite (See Curve2) LED Display (SSD+LED) 3CT 35mm Dinrail EOCR3DE Table #. Current Range Current Setting Range (Amps) 0.5 ~ 60A 0.25 ~ 3.0A 0. ~.2A ~ 2A.5 ~ 8A 2.0 ~ 24A 2.5 ~ 30A 3.0 ~ 36A 4.0 ~ 48A 5 ~ 60A 6 ~ 72A 7.5 ~ 90A 0 ~ 20A 2 ~ 44A 5 ~ 80A 20 ~ 240A 25 ~ 300A 30 ~ 360A 40 ~ 480A 50 ~ 600A 60 ~ 720A 75 ~ 900A 80 ~ 960A Number of Conductors thru CT windows 2 5 Extermal CT Ratio 0 : 5 5 : 5 20 : 5 25 : 5 30 : 5 40 : 5 50 : 5 60 : 5 75 : 5 00 : 5 20 : 5 50 : : : : : : : : : 5 Setting of CT Ratio OFF(Mode : ) 2t 5t Remark Wide Range EOCR3EZ Tolerance(3DD/ 3DZ / FD / FDZ / PMZ / SSD) Current Time I<A : 0.A IA : 5% 0.s Within 0.s t3s : 0.2S t>3s : 5% Caution The extermal CT should be used in case Inverse curve(toln setting) is applied over 0Amps. 2

15 EOCRFDE/FEZ Digital Over Current Relay MCU Based 3 Integral Current Transformers Overcurrent, UnderCurrent,, Phase Unbalance, Phase Reversal, Locked Rotor Digital Ammeter & Trip cause indication Selectable Characteristics Independently Adjustable Starting Trip Delay and + Load Alerting Function EOCRFDE + Ground Fault EOCRFEZ EOCRFDE / FEZ EOCRFDE Overcurrent OTIME Undercurrent 0.5~30 sec 3 sec Phase Unbalancal 8 sec Phase Reverse 0.~0.3 sec Locked Rotor DTIME EOCRFEZ Overcurrent OTIME Undercurrent 0.5~30 3 sec Phase Unbalancal 8 sec Phase Reverse 0.~0.3 sec Locked Rotor DTIME Ground Fault 0.~0 sec Model Over Current Setting Ground Fault Current Setting Alert Setting Start Time Setting (DTIME) Setting (OTIME) Control Voltage Contact Rating Time Characteristic Troubleshooting / Trip Indication Current Sensing Mounting Caution INV DEF OL AL/GR Rating In/ tc mode de/ tc mode The extermal CT should be used in case Inverse curve(tc ln setting) is applied over 0Amps. EOCRFDE EOCRFEZ Refer Table # : 0.02 ~ 3A / B: 0.2~0A 50 ~ 00% / OFF ~ 200 sec ~ ~ 30 sec, 0VAC5%, 220VAC5% 2SPST SPST AL Relay Ground Fault Relay 3A/250VAC Resistive Inverse (See Curve) Definite (See Curve2) LED Display (SSD+LED) 3CT 35mm Dinrail EOCRFDE How to set Mode DN UP Search a mode to be adjusted by depressing UP/DN mode switch. Set SET store Selected mode and setting value start flickering which means to be ready to accept setting as pressing once Set/store button Adjust DN UP Select a required setting value and/or characters by pressing continuously UP/DN mode switch until reaching what want to do. EOCRFEZ Store SET store Store a selected value and/or characters by pressing once Set/store button lnstantaneously the flickering is stopped. Reset RESET After completing above procedure, make a reset to be ready to operate. lf not made reset, it will be reset automatically after an elapse of 30sec. 3

16 EOCR3DM/FDM Series Digital Over Current Relay Compact Design 3DM : Panel Mounting Type FDM : Flush Mounting Type MCU(Microprocessor Control Unit) & ASIC Based 3 Integral Current Transformers Multiple Functions Digital Ammeter Troubleshooting / Trip Cause Memory, Display Adjustable Operating by Pulse Rotary switch Wide Current Adjustment Range Selectable TimeCurrent Characteristics (Inverse / Definite) Manual Instantaneous / Electrical Remote Auto Reset Test Function Ambient Insensitive Selectable Failsafe and Nonfailsafe Operation Modes Looping & External CT Option Refer to page 0 Alert Function : 3DM & FDM When motor operating current (In) exceeds the alert setting (As), the alert relay outputs three kind of signal. The output can be used to warn customers/operators of possible overloading and avoid unnecessary motor shutdown. The type of output signal is decided by the selection in the Alo mode A (Ampere relay): energized whenever CT senses a current F (Flickering): character A and current value flash frequently H (Holding): ONOFF Running state Setting ALo Flicker F Normal (operation) More then preset(%) of Alert Trip Hole H 3sec Comparison Table of Model EOCR Over current Under current Phase Unbalance Phase Reverse Locked Rotor Ground Fault Run Monitor & Load Alert Function Selectable Alerting Pulse Feature Function DIP Switch Over current Under current Phase Loss Phase Unbalance Phase Reversal Ground Fault Locked Rotor Stall DEF sw#3 on INV sw#3 off Definite time charateristic on : enable off : disable A Type: A B Type : 0.50A 3DM / FDM Description 3MZ / FMZ When motor operating current(in) exceeds preset oc setting, relay will trip after preset OTime in ot setting. The amperage of In(operating current) does not effct on relay trip time. The tripping time of relay depends on the amperage of In(operating current) according to timecurrent charateristics This is for idle/dry running protection The relay operates when the operating current is less than preset uc current after preset ut time elapses. The relay will be operated within 3sec. when the phase failure occurs This function works during DTime. The relay operates within 8sec. when the current diffenence among 3 phases is greater than 50% The calculation formula is(maxmin)/max current 00 50% In the event of wrong phase sequence, relay will be operated in 0.sec. Phase reversal protection function can be disabled by DIP selection. Ground fault protection is provided by the relay tripping sensed by Zero Phase Current Transformer (Core Balanced Current Transformer) The relay shows the leakage current during operation (3MZ & FMZ) The setting range is 20 times of oc setting. If the starting current exceeds more than setting value after preset DTime elapses, the relay will be energized within 0.5sec. This function is available on definite time characteristic. The setting range is 0sec. If the operating current exceeds more than 80% of preset oc setting the relay will be energized after preset st time elapses. Aux A In = Motor Operating Current / Is = EOCR Overcurrent Setting / As = Alert Setting Failsafe & Nonfailsafe The tripping relay can be operatcd in a failsafe or nonfailsafe mode Application of the Failsafe (Electrically Held) Connection Faie safe setting in NVR mode : ON The tripping relay is normally energized with control power supply Application of the Nonfailsafe Connection Fail safe setting in NVR mode: OFF In all cases, the failure of the control voltage may not interrupt the process. FS:ON (Fail safe) FS (OFF) (NonFail safe) Control power on Tolerance (3DM/ FDM / EVR Series) Current Time I<A : 0.A IA : 5% 0.s Within 0.s t<s : 0.s ts : 5% Ralay Trip 4

17 EOCR3DM/FDM Series Digital Over Current Relay LED Display Examples of Trip Cause Indication Overcurrent Trip Relay displays a trip, caused by maximun overcurrent. 0.7A which has been detected from phase L3(T/T3) Undercurrent Trip Relay displays a trip, caused by minimum Undercurrent..4A which has been detected from pfase L2(S/T3) Digital Ammeter 3 phase motor currents (In) are displayed in sequence on the LED display. 3DM/FDM Locked Rotor Trip Relay displays a trip, caused by locked rotor and maximum current. 26.9A which has been detected from pfase L(R/T) Locked Rotor Trip Relay displays a trip, caused by locked rotor while motor is working Phase reversal Trip Relay displays a trip, caused by phase reversal Phase Unbalance Trip Relay displays a trip, caused by Phase unbalance and maximum current 2.78A which has been detected from phase L(R/T) Trip Relay displays a trip, caused by phase loss which has been detected from phase L(R/T) 3MZ/FMZ Trip Relay displays a trip, caused by phase loss which has been detected from phase L2(S/T2) Trip Relay displays a trip, caused by phase loss which has been detected from phase L3(T/T3) Ground Fault Trip Relay displays a trip, caused by ground fault current 0.6A which has been detected from ZCT TimeCurrent Characteristic Curve Refer to Curve and Curve2 on page Setting Step of 3DM & FDM Digital Trip Cause Indication / Easy Troubleshooting Enter into FAULT mode with mode switch by depressing once Set/store button, then last trip cause is shown Each phase current is displayed in order whenever turn mode switch right or left Test This is the selftest of this product. If the relay enters into this mode, it begins its count down preset value of Otime of Ot mode after waiting 3sec and becomes trip state as showing END message that means this relay is ready to work. END message of a result of this test is also stored in Fault mode as last trip. Not permitted to test this function during the operation to prevent unnecessary trip Reset Pushing the RESET button or interrupting power resets the relay immediately. Electrical remote reset is also available through the panel mounted reset switch. The relay cannot be reset by control power interruption when the hand reset (Hr) selected in mode. In this case, it is possible to press the reset button on the relay facia. Automatic reset is also available if enter into reset mode (rt:ar) and reset delay time is adjustable from 0.3sec to 20min MODE Set Adjust Store Select the mode to adjust with turning the MODE/Adjust swith CW or CCW. Depress the SET/store button once to start the setting Adjust the required amount with MODE/Adjust switch Depress the SET/store button once to memorize the setting 5

18 EOCR3DM/3MS/3MZ/3M420 MCU & ASIC Based Overload Relay Overcurrent, Undercurrent,, Phase reversal, Phase Unbalance, Locked rotor protection Short current protection 3MS Ground Fault 3MZ Current Loop Commeunication 3M420 Including Current Tranducer : 4~20mA output Accummulation to Running time EOCR3DM / 3MS / 3MZ / 3M420 3DM 3MS 3MZ 3M420 Overcurrent DEF: 0.2 ~ 30sec, INV: ~ 30 DEF: 0.2 ~ 30sec, INV: ~ 30 DEF: 0.2 ~ 30sec, INV: ~ 30 DEF: 0.2 ~ 30sec, INV: ~ 30 UnderCurrent 0.5 ~ 30sec(DEF) 0.5 ~ 30sec(DEF) 0.5 ~ 30sec(DEF) 0.5 ~ 30sec(DEF) Phase loss 3sec 3sec 3sec 3sec Phase reversal 0.sec 0.sec 0.sec 0.sec Phase Unbalance 8sec 8sec 8sec 8sec Locked Roter Lock 0.5sec after dt 0.5sec after dt 0.5sec after dt 0.5sec after dt stall ~ 0sec ~ 0sec ~ 0sec ~ 0sec Ground fault 0. ~ 0sec Short circuit 0.sec Model Current Setting Range Time Setting Short circuit Control Power OverCurrent(oc) UnderCurrent(uc) Ground Fault Current(Ec) Starting Delay T ime(dt) OverCurrent Trip Delay(ot) UnderCurrent Trip Delay(ut) Ground Fault Trip Delay(Et) Contact Rating OL AL(GR/SC) Environment Temperature Store Operation Humidity Display 7Segment LEDs BarGraph Mounting 3DM Refer to, Table # 0.5 ~ under OC setting OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 85 ~ 250VAC/DC, 50/60Hz 2SPST, 3A/250VAC, Resistive SPST(AL) 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail 3MS Refer to, Table # 0.5 ~ under OC setting OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 0.sec 85 ~ 250VAC/DC, 50/60Hz 2SPST, 3A/250VAC, Resistive SPST(S.C) 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail 3MZ Refer to, Table # 0.5 ~ under OC setting A : 0.03 ~ 2.5A / B : 0.5 ~ 0A OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 0. ~ 0sec 85 ~ 250VAC/DC, 50/60Hz SPST, 3A/250VAC, Resistive SPST(GR) 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail 3M420 Refer to, Table # 0.5 ~ under OC setting OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 85 ~ 250VAC/DC, 50/60Hz 2SPST, 3A/250VAC, Resistive 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail Table #. Current Range Type Current Setting range 0. ~ 2.0A 0.25 ~ 5.0A 0.5 ~ 0A ~ 70A ~ 20A 0.0 ~ 2A 5.5 ~ 8A ~ 24A ~ 30A ~ 36A ~ 48A ~ 60A ~ 72A ~ 90A 00 0 ~ 20A 20 2 ~ 44A 50 5 ~ 80A ~ 240A ~ 300A ~ 360A ~ 480A ~ 600A ~ 720A ~ 900A ~ 960A Naumber of Conductord thru CT windows 5 2 Position of DIP S/W External CT ratio NIL NIL NIL NIL NIL 0 : 5 5 : 5 20 : 5 25 : 5 30 : 5 40 : 5 50 : 5 60 : 5 75 : 5 00 : 5 20 : 5 50 : : : : : : : : : 5 Setting of CT Mode Remark 5t 5t

19 EOCRFDM/FMS/FMZ/FM420 MCU & ASIC Based Overload Relay Overcurrent, Undercurrent,, Phase reversal, Phase Unbalance, Locked rotor protection Short current protection FMS Ground Fault FMZ Current Loop Commeunication FM420 Including Current Tranducer : 4~20mA output Accummulation to Running time EOCRFDM / FMS / FMZ / FM420 FDM FMS FMZ FM420 Overcurrent DEF: 0.2 ~ 30sec, INV: ~ 30 DEF: 0.2 ~ 30sec, INV: ~ 30 DEF: 0.2 ~ 30sec, INV: ~ 30 DEF: 0.2 ~ 30sec, INV: ~ 30 UnderCurrent 0.5 ~ 30sec(DEF) 0.5 ~ 30sec(DEF) 0.5 ~ 30sec(DEF) 0.5 ~ 30sec(DEF) Phase loss 3sec 3sec 3sec 3sec Phase reversal 0.sec 0.sec 0.sec 0.sec Phase Unbalance 8sec 8sec 8sec 8sec Locked Roter Lock 0.5sec after dt 0.5sec after dt 0.5sec after dt 0.5sec after dt stall ~ 0sec ~ 0sec ~ 0sec ~ 0sec Ground fault 0. ~ 0sec Short circuit 0.sec Model Current Setting Range Time Setting Short circuit Control Power OverCurrent(oc) UnderCurrent(uc) Ground Fault Current(Ec) Starting Delay T ime(dt) OverCurrent Trip Delay(ot) UnderCurrent Trip Delay(ut) Ground Fault Trip Delay(Et) Contact Rating OL AL(GR/SC) Environment Temperature Store Operation Humidity Display 7Segment LEDs BarGraph Mounting FDM Refer to, Table # 0.5 ~ under OC setting OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 85 ~ 250VAC/ DC, 50/60Hz 2SPST, 3A/250VAC, Resistive SPST(AL) 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail FMS Refer to, Table # 0.5 ~ under OC setting OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 0.sec 85 ~ 250VAC/ DC, 50/60Hz 2SPST, 3A/250VAC, Resistive SPST(S.C) 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail Table #. Current Range : Same as Table# on page 6 Caution : The extermal CT should be used in case Inverse curve(toln setting) is applied over 0Amps. FMZ Refer to, Table # 0.5 ~ under OC setting A : 0.03 ~ 2.5A / B : 0.5 ~ 0A OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 0. ~ 0sec 85 ~ 250VAC/ DC, 50/60Hz SPST, 3A/250VAC, Resistive SPST(GR) 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail FM420 Refer to, Table # 0.5 ~ under OC setting OFF ~ 200sec DEF : 0.2 ~ 30sec / INV : ~ ~ 30sec(DEF) 85 ~ 250VAC/ DC, 50/60Hz 2SPST, 3A/250VAC, Resistive 30 ~ ~ ~ 85RH, Without condensation 35mm Dinrail 7

20 EOCRFDM/FMS/FMZ/FM420 EOCR3DM EOCRFDM EOCR3MS EOCRFMS EOCR3MZ EOCRFMZ EOCR3M420 EOCRFM420 8

21 EOCRM Series Digital Over Current Relay MCU(Microprocessor Control Unit) Based Convenient installation PMZ : Panel Mounting Type PFZ : Panel Flush Mounting Type Easy to set 3 Integral Current Transformers Multiple Functions Wide range protection from 0.A to 3600A by just model Builtin digital ammeter Total running time display Current display like LL2L3GF BarGraph monitoring on impending overload trip Selectable timecurrent characteristics [Inverse / Inverse based on thermal Memory(Thermal Inverse) / Definite] 4~20mA current loop communcations Test function Selectable Failsafe operation / No volt Release (FS : ON) Operates in wide ambient temperature range Comparison Table of Model EOCR Current output 4~20mA Over current Under current Short current Phase Unbalance Phase Reverse Locked Rotor Ground Fault PMZ FMZ External CT Option Higher ampere ranges can be achieved by setting CT Ratio in ct mode to take an external current transformer, and the actual motor current display can be provided Current Setting Range Number of Conductors (Amps) thru CT windows Extermal CT Ratio Setting of CT Ratio 0.5 ~ 60A OFF 0.25 ~ 3.0A 2 2t 0. ~.2A 5 5t ~ 2A 0 : ~ 8A 5 : ~ 24A 20 : ~ 30A 25 : ~ 36A 30 : ~ 48A 40 : ~ 60A 50 : ~ 72A 60 : ~ 90A 75 : ~ 20A 00 : ~ 44A 20 : ~ 80A 50 : ~ 240A 200 : ~ 300A 250 : ~ 360A 300 : ~ 480A 400 : ~ 600A 500 : ~ 720A 600 : ~ 900A 750 : ~ 960A 800 : ~ 200A 000 : ~ 800A 500 : ~ 3000A 2000 : ~ 3000A 2500 : ~ 3600A 3000 : Remark Wide Range Looping Option Smaller ampere ranges than particular EOCR current range can be covered by looping the motor wire 2 or 3 times as under described. 0.5 Type Looping Option Feature Function Over Current Under Current Phase Loss Phase Unbalance Phase Reversal Ground Fault Locked Rotor Stall No of Loops Current Ratio of Ext. CT Description Current Setting Range (A) When the motor operating current(in) exceeds preset oc setting, the relay will trip after preset OTime in ot setting The amperage of In(operating current) will not effoet relay trip time. The tripping time of relay depends on the amperage of In (operating current) according to timecurrent charateristics Thermal Inverse characteristics is adopted inverse timecurrent charateristics based on thermal memory. If Otc:dE or Otc:In is selected, accumulated thermal memory is cleared (Automatically reset) This is for idle/dry running protection. The relay operates when the operating current is less than preset uc current after preset ut time elapses. The relay will be operated within 3sec. when the phase failure occurs. This function works during DTime. If this function is not necessary, it can be deleted by selected PL:oFF The relay operates within 8sec. when the current diffenence among 3phases is greater than preset % of unbalance. The calculation formula is (MaxMin)/Max current00 In the event of wrong phase sequence, relay will be operated in 0.sec. Phase reversal protection function can be disabled by setting RP:oFF Ground fault protection is provided by the relay tripping sensed by Zero. Phase Current Trasformer (Core Balanced Current Transformer) The relay shows the leakage current during operation. The characteristic of operating time can be selected for Etc:dE or In. The setting range is 20 times of oc setting. If the starting current exceeds more than setting value after preset DTime elapses, the relay will be energized within 0.5sec. This function is available on definite time characteristic It can be deleted by setting Lc:oFF The setting range is 0sec. If the operating current exceeds more than 80% of preset oc setting, the relay will be energized after the preset st time elapses. It can be deleted by setting Sc:oFF which makes St:oFF automatically(operating time of stall) Looping Option (Loop) Selection Otc:dE Selection Curve2 Otc:In Selection Curve Otc:th Definite time PL:on Selection Ub:6 shows 6% selected RP:on Selection Definite 0.030A inverse A Disable on inverse charateristic During DTime Disable on inverse charateristic After DTime 9

22 EOCRM Series Digital Over Current Relay LED Display Examples of Trip Cause Indication Overcurrent Trip Operated by max.current among 3 phases Undercurrent Trip Operated by min.current among 3 phases Digital Ammeter 3 phase motor currents (In) and ground(earth) leakage current are displayed in sequence on the LED display. Locked Rotor Trip Operated by Locked Rotor in starting state The highest current is L phase Stall Trip Operated by Locked Rotor in operating state L phase current reachis stall setting volue Phase Reversal Trip Operated by Reversal Trip Phase Unbalance Trip Operated by Phase Unbalance Trip The Lowest current in L2 phase Trip Trip The indication Shows L phase loss. Digital Trip Cause Indication / Easy Troubleshooting When EOCRM series relay trips, the cause of trip is displayed on the LED display. The displayed trip cause assures easy troubleshooting Failsafe & Nonfailsafe The tripping relay can be operated in a failsafe or nonfailsafe mode Application of the Failsafe Connection Fail safe setting in FS mode : ON The tripping relay is normally energized with control power supply Application of the Nonfailsafe Connection In all cases, the failure of the control voltage may not interrupt the process. Ground Fault Trip Operated by Ground fault current Each phase current is displayed in order whenever depress UP/DN switch every once after entering into trip mode TimeCurrent Characteristic Curve OT Setting IEC 9474(Trip Class) 0A FS:ON (Fail safe) Control power on Ralay Trip FS (OFF) (NonFail safe) Test This is the selftest of this product, checking function of sequence after the installation. If the relay enters into this mode, it begins its count down preset value of OTime after waiting 3sec and becomes trip state as showing END message that means this relay is ready to work END message of this test is also stored in Fault mode as last trip. While motor is running, output relay contact is not switched to prevent unnecessary trip Reset It can be selected by rt:hr, rt:er or rt:ar in rt mode. The rt means reset type and the meaning of Hr, Er and Ar are hand, electrical and auto reset respectively. The relay can be reseted by depressing the reset button on relay facia rt:hr, interruption of control power on A, A2rt:Er and by setting of automatic reset time from 0.2sec to 20min(indication : 20n) rt:ar and A:0.3 Curve Inverse Curve2 Definite Curve3 Inverse time characteristics of EC (Ground current range : 0.03~A) 20

23 EOCRPMZ Digital Over Current Relay MCU Based / Panel Mounting Type 3 Integral Current Transformers Overcurrent, Under courrent,, Phase Unbalance, Phase Reversal, Ground Fault. Locked Rotor and current output(4~20ma) Digital Ammeter & Easy Troubleshooting Bargraph Type LED Display Selectable Current Characteristics Independently Adjustable Starting Trip Delay and Operating Time EOCRPMZ EOCRPMZ Overcurrent OTIME Ground fault Preset Et time UnderCurrent Preset Ut time Locked Rotor 0.5sec after dtime Phase reversal 0.~0.3sec Stall 0.~0sec Phase Unbalance 8sec Model Current Setting Range Time Setting OverCurrent(oc) UnderCurrent(uc) Ground Fault Current(Ec) Starting Delay T ime(dt) OverCurrent Trip Delay(ot) UnderCurrent Trip Delay(ut) Ground Fault Trip Delay(Et) Ground Failt Starting Delay(Ed) Tolerance Current Time Control Power Contacts Rating OL GR Environment Temperature Store Operation Humidity Display 7Segment LEDs BarGraph Insulation Dielectric Strength Between casing and circuit Between open contacts Between circuit Electrostatic Discharge IEC Radiated Electromagnetic Field Disturbance IEC EFT / Burst IEC Surge IEC MHz Burst disturbance IEC Conducted Emission EN550 PMZ Refer to current setting range( page 9 ) Off / 0.5 ~ less than oc setting Off 0.3 ~ 0A : definite time characteristics 0.3 ~ A definite / inverse time characteristics, selectable Off ~ 200sec, Adjustable Definite Time 0.2 ~30sec Inverse Time.0 ~ 30class(30curves) 0.5 ~ 30sec, definite time characteristics, if uc mode is OFF, then OFF is displayed automatically in ut mode Definite / Inverse : 0., 0. ~ ~ 0sec(curve3) OFF / ~ 0sec 5% 5% 85 ~ 250VAC/DC, 50/60Hz 2SPST 3A / 250VAC Resistive SPST 3A / 250VAC Resistive 30 ~ ~ ~ 85% RH NonCondensing 3 Phase current, Trip cause, Operating hour Load factor for current setting(50 ~ 00%) Between casing and circuit : over 0, DC500V Between casing and circuit 2000VAC, 60Hz, min Between open contacts 000VAC, 60Hz, min Between circuit 2000VAC, 60Hz, min Lever 3 : Air Discharge : 8kV, Contact Discharge : 6kV Lever 3 : 0V/m, 50MHz & 450MHz Portable transceiver Lever 3 : 2kV, min Lever 3 :.50, 4kV(0, 90, 80, 270) Lever 3 : 2.5kV, MHz Class B EOCRPMZ (Terminal Type) 2

24 EOCRPFZ Digital Over Current Relay MCU Based / Panel Mounting Type 3 Integral Current Transformers Overcurrent, Under courrent,, Phase Unbalance, Phase Reversal, Ground Fault. Locked Rotor and current output(4~20ma) Digital Ammeter & Easy Troubleshooting Bargraph Type LED Display Selectable Current Characteristics Independently Adjustable Starting Trip Delay and EOCRPFZ EOCRPFZ Overcurrent OTIME Short Circuit 0.03~0.sec UnderCurrent Preset Ut time Ground fault Preset Et time Phase reversal 3sec Locked Rotor 0.5sec after dtime Phase Unbalance 8sec Stall 0.~0sec Model Current Setting Range Time Setting OverCurrent(oc) UnderCurrent(uc) Ground Fault Current(Ec) Starting Delay T ime(dt) OverCurrent Trip Delay(ot) UnderCurrent Trip Delay(ut) Ground Fault Trip Delay(Et) Ground Failt Starting Delay(Ed) Tolerance Current Time Control Power 220 Contact Rating OL GR Environment Temperature Store Operation Humidity Display 7Segment LEDs BarGraph Insulation Dielectric Strength Between casing and circuit Between open contacts Between circuit Electrostatic Discharge IEC Radiated Electromagnetic Field Disturbance IEC EFT / Burst IEC Surge IEC MHz Burst disturbance IEC Conducted Emission EN550 PFZ Refer to current setting range( page 9 ) Off / 0.5 ~ less than oc setting Off 0.3 ~ 0A : definite time characteristics 0.3 ~ A definite / inverse time characteristics, selectable Off ~ 200sec, Adjustable Definite Time 0.2 ~30sec Inverse Time.0 ~ 30class(30curves) 0.5 ~ 30sec, definite time characteristics, if uc mode is OFF, then OFF is displayed automatically in ut mode Definite / Inverse : 0., 0. ~ ~ 0sec(curve3) OFF / ~ 0sec 5% 5% 85 ~ 250VAC/DC, 50/60Hz 2SPST 3A/250VAC Resistive SPST 3A/250VAC Resistive 30 ~ ~ ~ 85% RH NonCondensing 3 Phase current, Trip cause, Operating hour Load factor for current setting(50 ~ 00%) Between casing and circuit : over 0, DC500V Between casing and circuit 2000VAC, 60Hz, min Between open contacts 000VAC, 60Hz, min Between circuit 2000VAC, 60Hz, min Lever 3 : Air Discharge : 8kV, Contact Discharge : 6kV Lever 3 : 0V/m, 50MHz & 450MHz Portable transceiver Lever 3 : 2kV, min Lever 3 :.50, 4kV(0, 90, 80, 270) Lever 3 : 2.5kV, MHz Class B EOCRPFZ (Terminal Type) 22

25 DCL/DUCR Electronic DC Current DOCRS/H Electronic DC Current DC Overcurrent Relay for DC Motor The millivolt() signals generated from the Shunt and power supply are sensed by solid state circuitry and compared with preset overload setting. In case sensing overload condition, the internal relay switches contact after the preset delay. It has easier control operation. It has DC Overload and DC Underload protection relays. It has wide DC current protection range from A to hundreds Amps. DC Ammeter maybe used instead of Shunt (DC Ammeter has its own shunt inside and keep 50mV maintained.) MCU (Microprocessor Control Unit) Based DC Motor / DC Device Sensing by Shunt (DOCRS) / by Hall Sensor (DOCRH) Actual primary current is displayed after Shunt / Hall Sensor setting. (Indication) Digital Setting / Tripped Current digital DATA displayed. (Indication) Auto Reset / Reset Time Setting Confirm Setting Current / Test Function No Volt Release function (Failsafe Operation) Setting ( NVR Setting) Overcurrent Undercurrent (Dryrun) DCL OTIME DUCR OTIME Overcurrent OTIME(Definite) In case the line voltage is same voltage with control voltage of DOCRS type, Contact our representative or our head office. Current Setting Type 70 Setting OTIME Reset M A Indication Power Supply Voltage Frequency Contact Rating N R Mounting Setting Range(DCL) Setting Range(DUCR) DC Overcurrent Relay DC Undercurrent Relay Secondary Voltage of Shunt (0~70m VCD) 30sec(Adjustable) Manual(Instantaneous) / Electrical(Remote) Auto(Instantaneous) Reset(Option) LED 0 / 220VAC Other Voltage(Option) 380 / 440VAC 50 / 60Hz Normally Energized Normally Deenergized Panel Current Setting OTIME Reset Time Rated Shunt Rated Hall Sensor Power Supply Voltage Frequency Reset Contact Rating Indication Mounting Mode Rating Setting Range Setting Range (DOCR/DUCRS) (DOCR/DUCRH) 0. ~ 240A 5 ~ 360A 0.5 ~ 25sec 0.5 ~ 25sec 0.5 ~ 25sec 0.5 ~ 25sec A, 2A, 5A, 0A, 20A, 50A, 0A, 200A 50A, 00A, 200A, 300A VAC/DC VAC/DC 50/60Hz Manual / Electrical / Auto Reset SPDT(C) 3A/ 250VAC Resistive 7Segment LED Panel EOCRS EOCRH 23

26 EUCR Electronic Undercurrent Relay EUCR3C Electronic Undercurrent Relay Compact Design Two Integral Current Transformers Underload (Dryrun Protector) Wide Current Adjustment Range Definite Characteristic Manual (instantaneous) / Electrical (Remote) Reset Ambient Insensitive Nonfailsafe Operation Compact Design Three Integral Current Transformers Underload / Dryrun Protector Wide Current Adjustment Range Definite Characteristic Manual (instantaneous) / Electrical (Remote) Reset Ambient Insensitive Failsafe Operation Undercurrent (Dryrun) OTIME Undercurrent (Dryrun) OTIME Current Setting Type Setting OTIME Reset Timecurrent Characteristics Power Supply Voltage Frequency Contact Rating Mode Rating Status Mounting Setting Range 0.5 6A A A Type fitted to External CT (Current Ratio: 00/5A 600/5A) sec Manual (Instantaneous) / Electrical (Remote) Definite 0VAC 220VAC 50/60Hz SPDT (C) 3A/250VAC Resistive Normally Deenergized 35mm DINrail / Panel Current Setting Type Setting OTIME Reset Timecurrent Characteristics Power Supply Voltage Frequency Contact Rating Mode Rating Status Mounting Setting Range 0.5 6A A A Type fitted to External CT (Current Ratio: 00/5A 600/5A) sec Manual (Instantaneous) / Electrical (Remote) Definite 0VAC 220VAC 50/60Hz 2SPST (ab) 3A/250VAC Resistive Normally Energized 35mm DINrail / Panel Normally Deenergized Normally Energized 24

27 EVR Electronic AC Voltage Relay EVRPD/FD Digital AC Voltage Relays EVRPD EVRFD Compact Design Multiple Functions 24 Hours Trip Cause Memory Trip Indication & Troubleshooting Ascertain Button Manual / Electrical Reset Ambient Insensitive MCU & ASIC Based Compact Design Multiple Functions Wide Voltage Adjustment Range Digital Volt Meter and Digital Setting Trip Cause Display & Easy Troubleshooting Manual / Electrical / Automatic Reset Adjustable Reset Timer Ambient Insensitive Overvoltage Undervoltage Phase Reversal OVRTIME UVRTIME 0.5 sec 0.5 sec Overvoltage Undervoltage Phase Reversal Voltage Unbalance (EVRPD/FD) OVRTIME UVRTIME 2 sec 0. sec 3 sec Rated Voltage Voltage Setting Setting Phase Reversal Timecurrent Characteristic Contact Rating Reset TEST ASCERTAIN S/W (Trip Cause Indication) Allowable Tolerance OVRVOLT UVRVOLT OVRTIME UVRTIME M A Voltage Time EVR 220 EVR 380 EVR45 220V 380V 45V V V V V V V sec 5 sec within 0.5 sec within 0.5 sec (after Supply Power) Definite SPDT(C), 5A/250VAC Resistive Manual Reset Automatic Reset (Reset Time = 5 sec) Trip in sec (after Pushing TEST Button) Trip Cause is memorized for 24 hours and Trip Cause will be indicated via LED by pushing Ascertain S/W. 5% 5% Voltage Setting Type Setting OTIME UTIME Control Voltage 220 Others Contact Rating Mode Rating Status Reset SW3=AUTO SW3=MAN Mounting PD FD DCU PCU Overvoltage (OVOLT) Undervoltage (UVOLT) 0 50V 80 20V V V V V sec sec AC/DC85 250V AC/DC24, 48V (Optional Order) SPDT(C) 3A/250VAC Resistive Normally Energized Reset Time: or 5 sec (DIPSW4) RESET Button 35mm DinRail / Panel Flush 35mm DINRail / Panel 25

28 DOVR/DUVR Electronic DC Voltage Relay DVR Electronic DC Voltage Relay Compact Design Definite current Characteristic Trip & Run Indication (LED) Confirm actual current and precise setting possible as it has Voltage Meter. Solid State DC Overvoltage / Undervoltage. MCU (Microprocessor Control Unit) Based DC Motor / DC Device Separate Setting for Overvoltage and Undervoltage Line Voltage Indicative Function (FND) Digital Setting / Trip Cause Indication Auto Reset / Reset Time Setting Confirm Setting Value / TEST Function No Volt Release Function (Failsafe Operation) Setting (NVR Setting) Overvoltage Undervoltage DOVR DUVR OTIME OTIME Overvoltage Undervoltage OTIME OTIME Model Voltage Setting Setting Trip Delay Reset Type Others OTIME M A Control Voltage 220 Others Contact Rating Mode SPDT(C) Status R Type Mounting DC Overvoltage DC Undervoltage Voltage Setting Range ~ 0V 3 ~ 30V 3 ~ 30V 0 ~ 0V 20 ~ 0V 20 ~ 220V 30 ~ 220V Option 0.2 ~ 30sec Manual(Instantaneous) / Electrical Reset Auto (Option) 0/220VAC, 50/60Hz Other Voltage Option 3A/250VAC Resistive Normally Deenergized Panel Model Overvoltage OVR Undervoltage UVR OTIME Reset Time RTIME Power Supply Voltage Frequency Reset Mounting Setting Range 00 ~ 60VDC 60 ~ 0VDC 0.5 ~ 25sec 0.5 ~ 25sec 85 ~ 250VAC/DC 50/60Hz Manual / Electrical / Auto Reset 35mm DINRail / Panel 26

29 ELR Earth Leakage Relay EFR2.5 Ground(Earth) Fault Relay MCU Based Compact Design Ground (Earth) Fault for Motor and Power Distribution Systems Zero Phase Current Detection Method Test Button Provides a Manual Selftesting Function Independently Adjustable Ground (Earth) Current and Trip (Operating) Delay Time Builtin Power Indication LED and Trip Indication LED MCU Based Compact Design Ground (Earth) Fault for Motor and Power Distribution Systems Residual Current Distribution Method Test Button Provides a Manual Selftesting Function Independently Adjustable Ground (Earth) Current and Trip (Operating) Delay Time Builtin Power Indication LED and Trip Indication LED Current Setting Time Setting Operating Characteristic Current Sensing Control Voltage Frequency Current Tolerance Time Tolerance Contact Rating Rated Insulation Voltage Expected Mechanical Life Expected Electrical Life Ambient Temperature Ambient Humidity Dielectric Strength Electrostatic Discharge EFT / Burst Surge Voltage Dip & Interruption Mounting 0.03 ~ 3A (0.03, 0.07, 0., 0.3, 0.5,,.5, 2, 2.5 and 3A Tap ) 0.2 ~ 2.0sec (0.2, 0.4, 0.6, 0.8,.0,.2,.4,.6,.8 and 2.0 sec Tap) Definite Time ZCT(CBCT) Zero Phase Current Detection 240VAC 0% 50/60Hz 5% 5% 5A/250VAC Resistive SPDT / Normally Deenergized 600VAC, 50/60Hz 0,000,000 Operation 00,000 Operation 20 ~ 60 0 ~ 85% without Condensation CasingCircuit 2kV, 50/60Hz, min ContactContact kv, 50/60Hz, min CircuitCircuit 2kV, 50/60Hz, min IEC Level3 IEC Level3 IEC Level3 IEC60004 Flush Mount (Panel Door Mount) Current Setting Time Setting Operating Characteristic Current Sensing Control Voltage Frequency Current Tolerance Time Tolerance Contact Rating Rated Insulation Voltage Expected Mechanical Life Expected Electrical Life Ambient Temperature Ambient Humidity Dielectric Strength Electrostatic Discharge EFT / Burst Surge Voltage Dip & Interruption Mounting 0. ~ 2.5A (0., 0.3, 0.5, 0.7,.0,.3,.5,.7, 2.0 and 2.5A Tap) 0.2 ~ 2.0sec (0.2, 0.4, 0.6, 0.8,.0,.2,.4,.6,.8 and 2.0 sec Tap) Definite Time Residual Current Detection 240VAC 0% 50/60Hz 5% 5% 5A/250VAC Resistive SPDT / Normally Deenergized 600VAC, 50/60Hz 0,000,000 Operation 00,000 Operation 20 ~ 60 0 ~ 85% without Condensation CasingCircuit 2kV, 50/60Hz, min ContactContact kv, 50/60Hz, min CircuitCircuit 2kV, 50/60Hz, min IEC Level3 IEC Level3 IEC Level3 IEC60004 Flush Mount (Panel Door Mount) 27

30 EGR Electronic Ground Fault Relay PMR Electronic Phase Monitoring Relay MCU Based Compact Design Ground Fault with ZCT Trip & Run Indication LED Manual / Electrical Reset MCU Based Compact Design Multiple Functions 2 5% Voltage Unbalance Setting Trip Cause Indication & Troubleshooting Manual / Electrical / Automatic Reset Ambient Insensitive Failsafe Operation Ground Fault OTime Phase Reversal Voltage Unbalance 0. sec sec 5 sec Ground Fault (GF) Type Current Setting 0 20 Setting OTIME Reset Power Suppy Contact Rating Mounting Mode/Rating Status Range mA 00,000mA 200 2,500mA sec Manual / Electrical (Push RESET Button or Interrupt Supply Power) 0 / 220VAC, 50/60Hz SPDT(C), 3A/250VAC Resistive Normally Deenergized 35mm DINRail / Panel Control Voltage Reset Contact Rating Mounting Troubleshooting Condition Normal Run Voltage Unbalancing Voltage Unbalance R Phase Trip S Loss T Phase Reversal On On Off Off Off Off Type Mode Rating Status Green LED Range VAC, 50/60Hz VAC, 50/60Hz Manual (Instantaneous) / Electrical Automatically reset with 5 sec delay when supply power comes to normal. SPDT (C) 5A/250VAC Resistive Normally Energized 35mm DINrail/Rail LED Signal (Pulse Chart) Red LED Off On On Flickering Flickering Flickering Flickering alternatively 28

31 2CT Current Transformer 3CT Current Transformer Fitted to EOCR relays for Large Amp Motor.0 Measuring Class For EOCR Only Model Current Ratio Class Budden Insulation Voltage Dielectric Strength Insulation Mounting 2CT00 00 : 5A.0 5VA 2CT50 50 : 5A.0 5VA 2CT : 5A.0 5VA 600VAC 2kV 0M(500VDC Megger) Panel 2CT : 5A.0 5VA 2CT : 5A.0 5VA Fitted to EOCR relays for Large Amp Motor.0 Measuring Class For EOCR Only Model Current Ratio Class Budden Insulation Voltage Dielectric Strength Insulation Mounting 3CT00 00 : 5A.0 5VA 3CT50 50 : 5A.0 5VA 3CT : 5A.0 5VA 600VAC 2kV 0M(500VDC Megger) Panel 3CT : 5A.0 5VA 3CT : 5A.0 5VA ZCT Zero Phase Current Transformer SRCT Current Transformer Applicable for Ground Fault Devices (EGR) Detect Zero Phase Current For EOCR Only Fitted to EOCR relays for Large Amp Motor Satisfied with IEC Inverse Trip Characteristic Class For EOCR Only Hole Dimension Primary GF Current Secondary GF Current Tolerance Budden Rated Voltage Dielectric Strength Insulation Mounting Type ZCT 35 ZCT 80 ZCT 20 Hole 35mm 80mm 20mm 200mA.5mA 0% 0VA 600VAC 2kV 0M(500VAC Megger) Panel Current Ratio Tolerance ( Class) Budden Secondary Current Insulation Voltage Dielectric Strength Insulation Mounting Type SRCT00 SRCT50 SRCT200 SRCT300 SRCT400 Current Ratio (SRCT) 00 : 5A 50 : 5A 200 : 5A 300 : 5A 400 : 5A 3%(0P0 / IF=0).25VA (5VA: Measuring Class) 5A 600VAC 3kV 0M(500VDC Megger) 35mm DINRail / Panel 29