How To Test A Meltric S Decontactor

Transcription

1 DECONTACTOR Series Switch-Rated Plgs & Receptacles The Main Differences Pressing the pawl/btton on the receptacle will safely switch off the DECONTACTOR. The plg can then be withdrawn in complete safety. (Ctaway model shown for illstration prposes) Switch and Hp Ratings Decontactors are a combination plg, receptacle and disconnect switch in the same device. The Decontactors integral switch technology ensres the safe breaking of resistive and indctive loads (p to 75 hp or 200A) before the plg can be removed from the receptacle. Decontactors are UL and CSA approved for both branch circit and motor circit disconnect switching, so they are ideal for connecting motors, welding machines and virtally any other electrical eqipment. Short Circit Ratings Like most Meltric prodcts Decontactors featre (see pgs 6-8) Spring-loaded btt contacts Silver-nickel contact materials Dead front constrction Enclosed arc chambers Spring-assisted terminals Axiliary contacts Only Decontactor TM prodcts also featre: = + To match the fnctionality of a DECONTACTOR, it wold take a pin and sleeve plg pls a non-fsed safety switch. UL & CSA switch-ratings Horsepower ratings Short circit ratings p to 100 ka in fse protected circits Decontactors help ensre worker safety even in falt conditions. All Decontactors are rated to close into and withstand short circit crrents of 65 ka to 100 ka. The protection far srpasses that offered by other plgs and receptacles, and even srpasses the short circit protection offered by most manal motor controllers and mechanical interlocks. 17 Don t let this happen to yo! Pin and sleeve devices are not safe to make and break nder load - Meltric Decontactors are.

2 UL & CSA Standards Test reqirements and ratings comparison table To attain their switch ratings, DECONTACTOR TM Series plgs and receptacles passed electrical and mechanical endrance tests, horsepower/locked rotor overload tests, and short circit make and withstand tests that far exceed the tests passed by ordinary plgs and receptacles. In fact, the tests performed to achieve the Decontactor s switch ratings are the same electrical performance tests reqired of manal motor controllers and enclosed disconnect switches (UL 508 and UL 98 type devices). The chart below compares the test reqirements for achieving a Switch-Rated Plg & Receptacle listing with those reqired for a standard pin and sleeve type plg & receptacle listing. UL 1682 & UL Sbject 2682 CSA 22.2 No (sed for both UL & CSA listings) Plgs, Receptacles & Cable Connectors of the Pin & Sleeve Type Switch-Rated Plgs & Receptacles Test Temperatre Rise Non-Crrent Interrpting Break Crrent Interrpting Motor Circit/Branch Circit Disconnect Switching (minimm reqirements) (minimm reqirements) (Tests passed by DECONTACTOR devices) < 30 C < 30 C < 30 C Voltage Withstand 1000V + 200% of Device Rating 1000V + 200% of Device Rating 1000V + 200% of Device Rating Overload General Use Devices 3 Operations 50 Operations % of Rated 150% of Rated 150% of Rated Crrent (p.f. = ) (p.f. = ) (p.f. = ) Mechanical Endrance (Pls Req d Electrical Opns) 15-20A = 5000 Opns 15-20A = 0 Opns 21-63A = 2000 Opns 21-63A = 1000 Opns A = 250 Opns A = 500 Opns covered by Electrical Endrance test Electrical Endrance (With Load) Overload - Locked Rotor (Horsepower Rated Devices) Short Circit Withstand Short Circit Make 15-20A = 5000 Opns 21-63A = 1000 Opns Cycles A = 250 Opns Rated Crrent & Rated Crrent & Voltage (p.f. = ) (p.f. = ) % of Fll Load Motor Crrent (p.f. = ) 10 ka + (600V and.50 power factor) 10 ka + (600V and.50 power factor) 1 Testing alternates between mechanical & electrical operations. This redces the severity of the electrical test by allowing additional cooling time dring electrical testing. + All Meltric switch-rated Decontactors are UL listed with short circit ratings of at least 65kA achieved at 600VAC and.15 power factor. 18

3 Benefit from Using Decontactors... Ensre Worker Safety Meltric Decontactors help ensre safety by eliminating the hazards associated with pin & sleeve and twist-type devices. The integral switching fnction ensres that the plg contacts are dead prior to removal from the receptacle and the dead front constrction prevents nintended access to live parts. This eliminates potential injry de to electrical shock. Spring-loaded, silver-nickel btt style contacts maintain proper contact force, withstand arcing, resist wear, and maintain low contact resistance. This ensres the integrity of the connection over thosands of operations and eliminates injries cased by heat, oxidation, wear and arcing indced failres of brass contacts. Psh btton operation and spring-loaded plg and receptacle disengagement ensres qick and operator independent load breaking. This helps minimize harmfl arcing dring disconnection and enclosed arc chambers eliminate the possibility of external arcs. Horsepower, switch and short circit ratings provide significant additional protection dring locked-rotor or other significant overload sitations. This eliminates injries that cold occr with standard plg and receptacles. Simplify Code Compliance Decontactors provide a simple and cost effective means of helping facilities to achieve compliance with the National Electric Code and NFPA 70E. NEC Compliance Articles throgh of the National Electrical Code reglate motor disconnection means (Canadian Electrical Code section ). They reqire motors to have readily accessible, line of sight disconnects that are either an approved switch or a properly rated plg and receptacle A disconnecting means mst be located in sight from the motor and driven eqipment The disconnecting means mst be readily accessible The disconnecting means mst be an approved switch or horsepower rated plg & receptacle. Meltric s DECONTACTOR Series plgs and receptacles are both horsepower and switch-rated. Ths, they can fnction as a line of sight disconnect in addition to providing a convenient plg and play power connection for the motor. The need for an axiliary disconnect switch is eliminated. NFPA 70E (CSA Z462) This OSHA consenss standard covers electrical safety related work practices and procedres for employees who work on or near exposed energized electrical condctors or other live circit parts. Relevant reqirements inclde: Power mst be proven to be off before work can be performed. This reqires: The safe interrption of the load & opening of the disconnect Visal verification/voltage testing to ensre deenergization The potential electrical hazard mst be identified and docmented. Arc flash risk assessment mst be performed Flash protection bondaries mst be determined Appropriate steps mst be taken to protect persons working near live parts or within the flash protection bondary. PPE mst be worn based on incident energy exposre levels (cal/cm2) Only properly qalified persons are allowed to perform work 19

4 ...Throghot yor Facility Wiring and connection systems tilizing conventional switches and/or pin & sleeve devices wold typically reqire all of the previosly listed protective measres to comply with NFPA 70E or CSA Z462. By sing Meltric s DECONTACTOR Series plgs and receptacles to connect eqipment, sers can very simply comply with these reqirements. Switch-ratings ensre the safe interrption of the load and removing the plg from the receptacle provides visal verification that the power is off. Dead front constrction prevents exposre to live parts and ths eliminates the need to perform hazard analysis, establish flash protection bondaries and se electrical personal protective eqipment. Motor Change-Ot Process Comparison MOTOR HARD-WIRED TO A BLADED DISCONNECT SWITCH Disconnect may be difficlt to install in line of sight from the motor MOTOR CHANGE-OUT PROCESS 1. Switch disconnect to OFF position 2. Apply lockot /tagot 3. Perform Shock/Arc Flash Risk Assessment 4. Obtain permit for energized electrical work 5. Sit p with appropriate PPE 6. Remove the disconnect switch cover 7. Voltage test to verify deenergization 8. Disconnect motor from hard-wiring 9. Remove old/install new motor 10. Connect new motor to hard-wiring 11. Jog the motor to ensre proper rotation 18 Qalified Worker w/ppe OR MOTOR CONNECTED WITH A MELTRIC MOTOR PLUG Cord connection allows easy line of sight location Dead front eliminates access to live parts and need for cmbersome PPE Ability to safely make & break nder load eliminates OR the need for interlocks 65k A short circit make and withstand rating ensres safety dring reenergization MOTOR CHANGE-OUT PROCESS 1. Switch Decontactor receptacle to OFF position 2. Mechanic removes plg from receptacle 3. Apply lockot /tagot as reqired 4. Mechanic removes old /installs new motor 5. Mechanic inserts plg into receptacle Meltric Makes it Safe & Easy MOTOR CONNECTED WITH A COMPETITIVE PLUG & RECEPTACLE Expensive mechanical interlocks are reqired since these plgs & receptacles cannot safely make & break nder load The interlock mst be monted on a fixed srface this may make line of sight location more difficlt MOTOR CHANGE-OUT PROCESS 1. Open interlock switch 2. Determine PPE reqirements & obtain 3. Remove interlock cover 4. Voltmeter test to verify deenergization 5. Remove plg 6. Apply lockot/tagot as reqired 7. Remove old/install new motor 8. Insert plg into receptacle Redce Eqipment & Installation Costs A Decontactor s ability to safely make and break nder fll load eliminates the need for the expensive interlocks that are reqired with pin and sleeve devices. Their ability to fnction as the NEC reqired line of sight disconnect eliminates the need for axiliary disconnect switches and their optional pilot contacts can eliminate the need for axiliary connectors for control circits. Redce Eqipment Change-ot Downtime & Cost Using Meltric s DECONTACTOR Series plg and receptacles to connect motors and other eqipment instead of hard-wiring can help redce eqipment change-ot time by as mch as 50%. With new motors pre-wired with Decontactor plgs or inlets, the only electrical connection reqired dring the change-ot will be to plg in the new motor. Ths, a mechanic will be able to perform the change-ot withot the immediate aid of an electrician. This avoids the schedling hassle of needing to also provide an electrician and eliminates the extra downtime reqired to do the wiring. The pre-wiring of replacement motors with Decontactor plgs or inlets can be done off-site and dring the convenience of non-downtime periods. This makes Decontactor Series plgs and receptacles an ideal choice for plg and play and modlar process applications. 20

5 Selecting the Right DECONTACTOR Family All Decontactors (DSN, DS and DB) featre: DSN Series (pages 23-36) Choose DSN Series for its Compact, lightweight design Atomatic Type 4X watertightness High HP Ratings (p to 75 hp) UL & CSA switch-ratings Short circit closing and withstand protection (65kA to 100kA) Common Applications Wet or washdown environments Plg & play electrical connections DS Series (pages 37-54) Silver-nickel contact material Spring-loaded, btt-style contacts Choose DS Series for its... High amperage range (p to 200A) Poly or metal casing materials (60A and above) Larger condctor capacities Common Applications Heavy indstry High amperage eqipment DB Series (pages 55-68) Choose DB Series for its... High HP ratings (p to 60 hp) Robst, heavy dty constrction Dead front safety shtter Optional axiliary contacts Common Applications Motors with freqent make and break reqirements Harsh environments 21

6 DSN Models and Ratings Maximm Maximm Nmber Model Casing Voltage Amperage of Contacts Environmental Material (VAC) Rating Main Axiliary Rating Maximm Horsepower Rating 480 VAC 600 VAC DSN20 Poly 600 VAC 20A 3P+N+G Type 4X IP66+IP67 5 hp 5 hp DSN30 Poly 600 VAC 30A 3P+N+G 2 Type 4X IP66+IP67 10 hp 15 hp DSN60 Poly 600 VAC 60A 3P+N+G 4 Type 4X IP66+IP67 20 hp 20 hp DSN150 Poly or Metal 600 VAC 150A 3P+N+G 6 Type 4X IP66+IP67 75 hp 75 hp DS Models and Ratings Maximm Maximm Nmber Model Casing Voltage Amperage of Contacts Environmental Material (VAC) Rating Main Axiliary Rating Maximm Horsepower Rating 480 VAC 600 VAC DS20 Poly 600 VAC 20A 3P+N+G 2 Type 3R 7.5 hp 10 hp DS30 Poly 600 VAC 30A 3P+N+G 4 Type 3R 15 hp 15 hp DS60 Poly or Metal 600 VAC 60A 3P+N+G 3 Type 3R 20 hp 25 hp DS100C Poly or Metal 600 VAC 100A 3P+N+G 3 Type 3R 25 hp 25 hp DS100 Poly or Metal 600 VAC 100A 3P+N+G 6 Type 3R 30 hp DS200 Metal 480 VAC 200A 3P+N+G 5 Type 3R DB Models and Ratings Maximm Maximm Nmber Model Casing Voltage Amperage of Contacts Environmental Material (VAC) Rating Main Axiliary Rating Maximm Horsepower Rating 480 VAC 600 VAC DB30 Zinc Alminm 600 VAC 30A 3P+N+G 2 IP67 20 hp 25 hp DB60 Zinc Alminm 600 VAC 60A 3P+N+G 2 IP67 30 hp 30 hp DB100 Zinc Alminm 600 VAC 100A 3P+N+G 4 IP67 60 hp 60 hp 22