Vacuum Circuit Breaker CESI, KERI, CCC, ISO 9001, ISO 14001

Vacuum Circuit Breaker CESI, KERI, CCC, ISO 9001, ISO 14001

Vacuum Circuit Breaker General characteristics General characteristics 3 Ratings 4 Constructional and operating characteristics 6 Control circuit diagram 8 External dimension (VCB) 9 External dimension (Cradle) 11 Accessories 14 Types designation and ordering information 19 2

Breaking current(t) 274 268 260 130 116 104 72 36 15 9 3 Comparison talbe for VCB(Breaking current) Pro-MEC IEC62271-100 IEC62271-100 IEC60056/62271-100 10% 30% 60% 100% 100% E2(Main circuit replace impossibility) E2 E2 (sym) (asym) E1(Main circuit replace possibility) (List2) (List1) Test(A, % Breaking current) VCB class High reliability of the operating mechanism - Separate design of the main circuit from the operating mechanism. - Adopt the toggle link method. - Improved the reliability of electric circuit. - Adopt the rapid auto-reclosing method as a standard option. (O-0.3sec.-CO-3min.-CO) High interrupting performance - Make short of the interrupting time. (3cycles) - Increase the rated short-circuit withst and characteristics. (1sec. to 3sec.) Great operational safety - Reinforce the insulation in the conduct, by adopting the molded housing in each phase. - Built in the device making the contacts open first when draw in and out. - Adopt the tulip-shape connection between the cradle and the VCB. Wide range of accessories (optional) Key Lock Button padlock Button cover Position switch (Cell switch) Preparatory trip coil (Secondary trip coil) Latch checking switch Charge indicator Position padlock Earthing switch Padlock of earthing switch Position switch of the earthing switch Locking coil of earthing switch Shutter padlock MOC (Mechanically operated cell switch) TOC (Truck operated cell switch) Code plate (Miss insertion prevention) Capacitor trip device Rectifier 3

Vacuum Circuit Breaker Ratings Rated voltage Rated current (kv) (A) Rated frequency (Hz) Rated breaking current (ka) Rated breaking capacity (MVA) Rated short-time current (ka/3sec) Rated closing current (ka) Rated breaking time (Cycle) Rated opening time (sec) No-load closing time (sec) Withstand voltage Power frequency (kv/1.2 X 50μs) Impulse (kv/1.2 X 50μs) Standard test duty Mechanical Class Electrical Lifetime Auxiliary switch Installing method Weight Applied standard Test laboratory Charge current breaking Note 1) Mechanical Without maintenance Maintenance Electrical Without maintenance Maintenance Fixed type Drawout type VCB Cradle KERI Type E-type F-type G-type Note 2) M-type E-type F-type G-type E-type F-type G-type (Time) (Time) (Time) (Time) (kg) (kg) (kg) (kg) (kg) (kg) LVB-20-13D LVB-20-13D/T LVB-20-25D LVB-20-25D/T 24 24 630 630 1250 1250 2000 50/60 50/60 12.5 25 520 1000 12.5 25 32.5 65 3 3 0.04 0.04 0.06 0.06 50 50 125 125 O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO M2 M2 E2 List1 E2 List1 C2 C2 20000 20000 30000 30000 20000 20000 30000 30000 4a4b, 10a10b 4a4b, 10a10b Releasing, Fixed - Releasing, Fixed - Releasing, Clip Hermetic, Tulip Releasing, Clip Hermetic, Tulip Releasing, Clip Hermetic, Tulip Releasing, Clip Hermetic, Tulip Releasing, Tulip Hermetic, Tulip Releasing, Tulip Hermetic, Tulip - Hermetic, Tulip- Hermetic, Tulip 145 145 145 145 145 145 145 145 155 187 155 187(630/1250A) 218 (2000A) 80 80 80 80 82 82 82 82 110 120 110 120 IEC 62271-100 IEC 62271-100 Note 1) Applied cable-charging breaking current 2) G-Type releasing, tulip: manufactured G30, 1250A only Fixed type VCB E-type cradle F-type cradle G-type cradle 4

Motor When the closing spring is charged, the control power of motor is turned off by the built-in limit s/w. Rated voltage The peak value of the Rated current (A) Consumption Charging time inrush current (A) power (W) (Sec.) 12.5kA 25kA 12.5kA 25kA DC 24V 30 30 15 15 350 12 DC 110V 20 20 5 5 330 12 Note 1) Range of the normal operating voltage : 85~110% 2) DC 24V is the underdeveloped rating. Closing Coil (C) The coil operated only when the power is applied continuously over 45ms. It has built-in electrically antipumping circuit. Rated voltage Rated current (A) 12.5kA 25kA DC 24V 10 10 DC 110V 2.5 2.5 Note 1)Range of the normal operating voltage : 85~110% 2) DC 24V is the underdeveloped rating. Shunt coil (TC) When the VCB is 'ON' position, even though the control power of a shunt coil is 'OFF', the VCB maintains the 'ON' position. Rated voltage Rated current (A) 12.5kA 25kA DC 24V 10 10 DC 110V 2.5 2.5 Note 1)Range of the normal operating voltage : 70~110% 2) DC 24V is the underdeveloped rating. Auxiliary switch Standard 4a4b / Optional 10a10b Position of the Aux.contact switch Classification General Inductive Contact load (A) load (A) configuration AC 250V 10 5 125V 10 5 Contact Ratings 250V 10 5 4a4b 10a10b DC 125V 10 5 30V 10 5 VCB ON OFF Note) The contact capacity of the following accessories are the same with that of the Aux. switch. Position switch, Closing spring contact, Charging complete indicating contact, Position switch of the earthing switch, Mechanically operated cell switch, Truck operated cell switch. a contact s/w ON OFF b contact s/w OFF ON Charging indicator of the closing coil Indicating the condition of the closing spring. Position indicator of the main contacts Indicating the 'Close' or the 'Open' of the main contacts. Close position : ON Open position : OFF Charged Discharged Close position Open position Indicator of the contact wear Indicator of the contact wear of the Vacuum Interrupter. When it indicate '3', the user need to replace the VI. Counter Mechanically counts the switching of the VCB by 5digit analog type counter (Standard option) 5

Vacuum Circuit Breaker Constructional and operating characteristics 1 2 3 4 6 7 5 12 9 10 1 Charge Indicator of the closing coil 2 Close button 3 Key lock (Optional) 4 Trip button 5 Manual charge hole 6 Position indicator of the main contacts 7 Counter 8 Draw-in and out screw hole 9 Rating label 10 Indicator of the contact abrasion 11 Mounting hole 12 Safety cover 11 8 Manual charge Insert the charge handle into the manual charge hole in the front of a VCB, and rotate it to clockwise over 20times and the charge complete with a metal sound. Motor charge If you apply the control power to a VCB, the closing spring will be charged automatically by a motor and then the control power will be turned off by the built-in limit s/w. Please use the same control voltage for motor, Closing coil, Trip coil. Sequence of the switching mechanism Charging time of a closing spring 12secs. Start closing Closing Earthing switch OFF Control power ON Earthing switch ON Complete closing (Earthing switch ON) Earthing switch ON Trip (Open) Breaking start Complete breaking Motor Closing spring Breaking spring Closing coil Tripping coil Circuit On Off Charging Discharging Charging Discharging On Off On Off On Off 6 Closing time Breaking time

Vacuum Interrupter (Breaking part of a VCB) The core part of a Vacuum Interrupter is the 'Contact'. The contact is strong against the withstand voltage and has little contact wear rate, because it is made of the 'CuCr' material and it adopt the spiral shape contact structure. With unique structure, the spiral shape contact lead the arc, drawn between the surfaces of contact, to rotate around the contact. So, it prevent the partial heating and strong against the contact wear and the breaking time is short. Moving electrode Current path Movable end plate Bellows Arc Driving force on the high current Arc Moving contact Fixing contact Ceramic Arc shield End shield Fixed end sealcup <The current flow and arc rotation in a spiral shape contact> <Internal structure of a Vacuum Interrupter> (i) Weld (ii) Bridge explosion (i) Contact jets (ii) Shield involvement (i) Arc instability (ii) Interruption Arc initiation High current arc mode Current zero Fault current Time (ms) Time (μs) Recovery voltage <Arcing and interruption phenomena of a Vacuum Interrupter> Voltage phenomena (i) Arc re-ignition (ii) Restrikes (iii) B.I.L (iv) A.C.voltage withstand 7

Vacuum Circuit Breaker Control circuit diagram Control circuit diagram Note 1) Note 3) Note 4) (Charge complete indicating contact) ф : External terminal of VCB 52 : Vacuum circuit breaker M : Spring charging motor TC : Trip coil TC1 : Secondary Trip coil C : Closing coil Y : Anti-pump relay 52a : Auxiliary switch (NO) 52b : Auxiliary switch (NC) LS1 : Closing interlock limit switch (only withdrawable type) LS2 : Motor stopping, closing spring charged indication LS3 : Anti-closing, anti-pumping limit switch LCS1 : Opening latch checking switch(preventing closing unless the trip latch is properly reset) LS4, LS5 : Position s/w (close in test position) LS6, LS7 : Position s/w (close in run position) Note1) LCS1 : Latch checking switch Note2) Position switch : 4a (Terminal No. : 1, 2, 3, 4, 5, 6, 7, 8) Note3) TC1 : Secondary trip coil (Preparatory trip coil Terminal No. : 82,83) Note4) In fixed type VCB, LS1 (Closing-coil limit switch) is not available. Aboue circuit diagram is based on OFF status of VCB. and closing spring is charged. Optional accessories Trip coil monitoring contact Note 2) Control terminal configuration C A B A B A1 A2 38 39 A1 A2 38 39 40 A3 A4 50 51 A3 A4 50 51 42 A5 A6 52 53 A5 A6 52 53 44 9 10 9 10 54 55 46 22 23 22 23 56 57 48 34 34 24 25 11 12 24 25 11 12 58 26 27 1 2 26 27 1 2 60 28 29 3 4 28 29 3 4 70 82 83 5 6 82 83 5 6 72 36 37 7 8 36 37 7 8 74 4a4b 10a10b 41 43 45 47 49 59 61 71 73 75 8

External dimension (VCB) LVB-20P-13D, 25D (Releasing, Fixed type) - 630/1250/2000A Front Side (Unit : mm) 265 700 265 362 86 760 83 300 179 800 562 630A 1250A 2000A 2-ф14 4-ф14 4-ф14 40 40 70 40 80 380 785 340 10: 630,1250A 20: 2000A 4-ф13 Mounting hole <Terminal conductor> 40 20 40 25 40 25 LVB-20E, F-13D / (T), 25D / (T) Front E, F class - (630/1250/2000A) Side 700 265 265 362 146 480 400 400 805 805 340 340 739 (E class) 800 (F class) 41 622 663 41 594 635 <Clip contact> <Tulip contact> 9

Vacuum Circuit Breaker External dimension (VCB) LVB-20G-13D, 25D G class (Releasing, Tulip contact) - 630/1250A Front Side (Unit : mm) 700 265 265 305 193 805 400 340 89 730 41 670 820 711 LVB-20G-13D/T, 25D/T G class (Hermetic type, Tulip contact) - 630/1250/2000A Front Side 265 265 695 630/1250A 2000A 445 445 840 435 340 340 910 350 50 514 818 10

External dimension (Cradle) LCL-20E-13D, 25D Front G class (Releasing, Clip contact) - 630/1250/2000A Side (Unit : mm) Rated A B T 630, 1250A 768 175.5 10 2000A 778 180.5 20 285 st: 260 Insulation barrier B 404.5 A 340 1033 T 1035 22 1120 1000 1167 Top < Terminal conductor> 12.5kA 630A 25kA 630A 12.5kA 1250A Insulation barrier 25kA 1250, 2000A 62 67 47 820 168 660 260 7-ф14 Mounting hole 265 265 145 50 ф6.5(eartating) 2-ф14 50 40 20 50 250 20.5 40 20 100 40 120 2-ф14 4-ф14 85 40 85 100 178 40 20 120 177.5 300 300 110 400 400 210 < Earthing terminal> ф6.5 10 30 46 11

Vacuum Circuit Breaker External dimension (Cradle) LCL-20E-13D/T, 25D/T E class (Hermetic type, Tulip contact) - 630/1250/2000A Front Side Rated A B T 630, 1250A 768 175.5 10 2000A 778 180.5 20 (Unit : mm) st: 260 T 265 265 A 404.5 340 1033 10 B 947.5 97.5 22 1120 952 1167 Top < Terminal conductor> 630A 1250A 2000A Insulation barrier 820 168 660 260 7-ф14 Mounting hole 265 265 145 25 20 50 67 ф6.5(eartating) 50 245 210.5 80 90 47 50 90 42 100 45 2-ф14 4-ф14 4-ф14 40 20 40 20 40 20 40.5 40 100 202 80 300 300 110 400 400 210 < Earthing terminal> 12.5 ф6.5 30 22.5 12

LCL-20F-13D, 25D F class (Releasing, Clip contact) - 630/1250/2000A Front Side (Unit : mm) Rated A B T 630, 1250A 768 175.5 10 2000A 778 180.5 20 285 st: 260 Insulation barrier B 404.5 A 340 1033 T 1035 1120 22 1000 1167 Top < Terminal conductor> 12.5kA 630A 25kA 630A 12.5kA 1250A Insulation barrier 25kA 1250, 2000A 62 67 47 820 168 660 260 7-ф14 Mounting hole 265 265 145 50 ф6.5(eartating) 2-ф14 50 40 20 50 250 20.5 40 20 100 40 120 2-ф14 4-ф14 85 40 85 100 178 40 20 120 177.5 300 300 110 400 400 210 < Earthing terminal> ф6.5 10 30 46 13

Vacuum Circuit Breaker External dimension (Cradle) LCL-20F-13D/T, 25D/T F class (Hermetic type, Tulip contact) - 630/1250/2000A Front Side (Unit : mm) Rated A B T 630, 1250A 768 175.5 10 2000A 778 180.5 20 285 st: 260 Insulation barrier B A 404.5 340 1033 T 1000 1035 1120 1167 22 Top < Terminal conductor> 12.5kA 630A 1250A 2000A Insulation barrier 20 67 47 45 820 168 260 660 7-ф14 Mounting hole 265 265 145 40 50 ф6.5(eartating) 2-ф14 4-ф14 4-ф14 50 20 50 245 40.5 90 90 210.5 80 42 40 40 20 40 20 100 80 100 202 300 300 110 400 400 210 < Earthing terminal> ф6.5 10 30 46 14

LCL-20G-13D, 25D G class (Releasing, Tulip contact) - 630/1250A Front Side (Unit : mm) 265 265 274 1033 340 st:260 404.5 10 22 7-ф14 Mounting hole 731 820 1000 ф6.5(eartating) 29.5 160 1027 231 Top < Terminal conductor> 2-M12 TAP (DP:20) 7-ф14 Mounting hole 660 260 A 25 265 VIEW "A" 265 820 103 110.5 400 400 347.5 15

Vacuum Circuit Breaker External dimension (Cradle) LCL-20G-13D/T, 25D/T G class (Hermetic type, Tulip contact) - 630/1250/2000A Front Side (Unit : mm) Test st: 310 Run 340 126 1420 A 246.2 435.2 681.4 960 (35) 1160 Top < Terminal conductor> RUN 60 2-ф13 26 920 265 265 860 340 83 17 26 100 25(2000A) 763 264 10(630/1250A) 4-ф14 Mounting hole VIEW "A" Earthing Switch 630/1250A 2000A B 635 2-ф13 100 10 763 327.4 327.4 10 10 17 26 26 50 VIEW "B" 16

Accessories Optional accessories of the VCB Key lock When it is locked by a key, the closing operation is not available (electrically and mechanically) without a Key. Button padlock Button padlock protects ON or Trip button when accident is occured by operation at discretion. It is available to operate after release button padlock. Button cover Button corer protects ON of Trip button when accident is occured by operation at discretion. It is availabe to operate by push bar. <Push bar> Position switch (Cell switch) Indicating the position (Run or Test) of a VCB, by mechanically pressing the switch when a VCB change the position. - RUN : 2a - TEST : 2a 2a(Test) 2a(Run) <G class> Note) In case of VCB is fixed on TEST or RUN position it will be transfer to b contact. 17

Vacuum Circuit Breaker Accessories Optional accessories of the VCB Secondary coil (Preparatory trip coil) The main coil and the preparatory coil is connected in parallel. So even though there happens a fault in the trip coil, the VCB can be tripped by one of the two trip coils. Latch checking switch When the Latch is in abnormal position, the Latch checking switch prevent the closing operation even though there is the 'Closing' signal. Charge indicator Remotely indicates the charging is completed. (Standard Feature) - Terminal No. : 9, 10 Position padlock The hole to prevent the draw-in and out of a VCB from the present position.('run' or 'Test') Standard option in the interlock lever of the E, F class draw-out type VCB. (Hole size = ф 8) 18

Optional accessories of a Cradle Earthing switch (for G class draw-out type only) For the safety during the maintenance of a VCB panel, discharge the charging current in the load side of a VCB with this earthing switch. Padlock of earthing switch (for G class draw-out type only) The hole to prevent the accident through carelessness earthing switch operation, the locking of the earthing switch is available when the switch is in 'OFF' position. (Hole size = ф 8) Position switch of the earthing switch (for G class draw-out type only) Indicates the 'ON' or 'OFF' status of the earthing switch. (5a5b) <Earthing Switch Position Switch> Locking coil of earthing switch (for G class draw-out type only) To prevent the accident through carelessness earthing switch operation, the earthing switch can be changed to 'ON' position after releasing the lock by magnetizing the coils. <Earthing Switch Locking Coil> 19

Vacuum Circuit Breaker Accessories Optional accessories of a Cradle Shutter padlock -Standard offer in the draw-out type The hole to lock the shutters (load and line side) in close position, to increase the safety during the maintenance of a VCB draw-out position. (Hole size = 8) Mechanically operated cell switch (MOC) -for G class draw-out type only The auxiliary switch (3a4b), which Indicate the 'ON' or 'OFF' condition of a VCB, but operated only when the VCB is in 'Run' state. (Installed in the bottom of a cradle) Note) #11, 21 are Early b contact Truck operated cell switch (TOC) -for G class draw-out type only The auxiliary switch (3a4b), which indicate the 'Run' state of a VCB and is operated by the movement of a VCB frame. (Installed in the bottom of a cradle) Note) #11, 21 are Early b contact Code plate (Miss insertion prevention) -for E,F class draw-out type only To prevent the insert a VCB to a cradle, when the ratings of VCB and cradle are different. Padlock To prevent the insert draw-in/out handle to a screw hole by operating G class VCB temporarily 20

Optional accessories Capacitor trip device (CTD) When the control power is off, the CTD supply the power for tripping a VCB. Type VCB-T1 VCB-T2 Rated input voltage AC100/110V AC200/220V Tripping time Within 30 Sec. after the AC power off Voltage of the CTD DC100/110V DC200/220V Rectifier When the DC power is not available, rectify the AC power and get the DC power for closing coil. Type AC Input voltage Output current Rating time VCB-X 1ф 100/110V 1ф 200/220V 40A dc 10 sec. Dimension Dimension 8-ф7 Mounting hole 90 80 145 22.5 165 22.5 250 20 Pilot Lamp 11 124 55 2-ф35 52 2-ф7 Mounting hole 90 20 100 150 94 35 2-ф20 25 Connection circuit diagram Connection diagram A5 52a TC A6 Capacitor trip device Standard tool E, F class G class Handle for draw-in and out Handle for draw-in and out the VCB (Standard feature in the draw-out type) Manual charging handle Handle for charging the spring manually. (Standard feature) 21

Types and ordering information LVB 20 G 13 D 06 1A 2B B, C, D LG VCB Rated voltage 06 7.2kV 20 24kV Note) 7.2 kv VCB is under development. Cradle P E F G M Installation method Fixed type E class draw-out type F class draw-out type G class draw-out type G class draw-out type + Bushing Revision No. A General type D Pro-MEC (Standard) Rated current 04 400A 06 630A 12 1250A B 2000A 30 3150A Breaking current 8 8kA 13 12.5kA 20 20kA 25 25kA 32 31.5kA 40 40kA Note) In case 24kV, only both of 12.5kA and 25kA are available Control voltage 00-1A DC110V 1B DC220V 1C DC48V 1D DC24V 1E DC125V Auxiliary switch 00-2B 4a4b(AMP Jack) 2E 10a10b(AMP Jack) 2G 4a4b(Phoenix Jack) 2H 10a10b(Phoenix Jack) Accessories B Position Switch (RUN/TEST:2a2a) C1 Button Padlock (ON) C2 Button Padlock (OFF) C3 Button Padlock (ON/OFF) D1 Button Cover (ON) D2 Button Cover (OFF) D3 Button Cover (ON/OFF) Button padlock (ON) E +Button cover (OFF) Button padlock (OFF) F +Button cover (ON) G Key Lock Secondary Trip Coil H (Preparatory trip coil) K Opening Latch Checking Switch N CTD(Capacitor Trip Device) O Rectifier P1 Dummy VCB(AMP Jack) P2 Dummy VCB( Phenix Jack) Q Earthing Truck(Lower) R Earthing Truck(Upper) S Pad Lock(G class) T Close up, Tulip contact LCL 20 G 13 B 06 A, B, C LG VCB Rated voltage 06 7.2kV 20 24kV E F G Installation method E class draw-out type F class draw-out type G class draw-out type (Bushing) Breaking current 8 8kA 13 12.5kA 20 20kA 25 25kA 32 31.5kA 40 40kA Revision No. A General type D Pro-MEC (Standard) Rated current 04 400A 06 630A 12 1250A 20 2000A 30 3150A Accessories A MOC (3a4b)+ TOC (3a4b) B Earthing Switch Earthing Switch Position Switch + C Earthing Switch Locking coil T Close up, Tulip contact Note) A, B, C is for G class only Note) In case 24kV, only both of 12.5kA and 25kA are available Note) 7.2 kv VCB is under development. 22

Memo 23

ACB(A) 2001 / Jul. 2003 Printed in Korea STAFF 2003-07