Cutler-Hammer - Eaton Canada

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B1-8 Medium-Voltage Distribution Equipment Metal-Clad Switchgear – Drawout Vacuum Breakers (VCP-W) Application and Technical Data Control Equipment Circuit Breaker Control The VCP-W circuit breaker has a motor charged spring type stored energy closing mechanism. Closing the breaker charges accelerating springs. Protective relays or the control switch will energize a shunt trip coil to release the accelerating springs and open the breaker. This requires a reliable source of control power for the breaker to function as a protective device. For ac control, a capacitor trip device is used with each circuit breaker shunt trip to ensure that energy will be available for tripping during fault conditions. A control power transformer is required on the source side of each incoming line breaker. Closing bus tie or bus sectionalizing breakers will require automatic transfer of control power. This control power transformer may also supply other ac auxiliary power requirements for the switchgear. Signal: Initiation of Initiation of Close Signal Trip Signal VCP-W Circuit Breaker Main Contacts Breaker Aux. Switch "a" Contact Rated Control Voltage 48 Vdc 125 Vdc 250 Vdc 120 Vac 240 Vac 9.0 4.0 2.0 4.0 2.0 C Closing Time ∆t = 45-60 ms 6 6 6 6 6 ∆t ±3 ms 16 7 4 6 3 200 80 40 T Opening Time ∆t = 30-45 ms Table 11: Control Power Transformers, 1 Phase, 60 Hertz➀➁ Taps Secondary +7 Volts 1 ⁄2% Rated -71 ⁄2% 2580 2400 2220 240/120 4470 4160 3850 240/120 5160 4800 4400 240/120 7740 7200 6680 240/120 9030 8400 7770 240/120 13405 12470 11535 240/120 14190 13200 12210 240/120 14835 13800 12765 240/120 24725 23000 21275 240/120 37088 34500 31913 240/120 38-56 100-140 200-280 104-127 208-254 Cutler-Hammer ∆t ±3 ms 28-56 70-140 140-280 104-127 208-254 kVA kV Class 5, 10, 15 5, 10, 15 5, 10, 15 5, 10, 15 5, 10, 15 5, 10, 15 5, 10, 15 5, 10, 15 5, 10, 15 15, 25 5 5 5 15 15 15 15 15 27 38➂ .035 .035 .035 .035 .035 May 2001 Dc control would require a dc control battery, Open battery charger and an ac auxiliary power source for the battery charger. The battery provides a very reliable dc control source, since it is isolated from the ac power system by the battery charger. However, the battery will require periodic routine maintenance and battery capacity is reduced by low ambient temperature. Breaker Aux. Switch "b" Contact "b" Breaks 6 ms Before "a" Makes ∆t –6 ms to –3 ms "a" Breaks 7 ms Before "b" Makes Closed ∆t +10 ms to +4 ms Open Any economic comparison of ac and dc con- Table 9: Auxiliary Switch Contacts Interrupting Capacities trol for switchgear should consider that the ac Type Auxiliary Switch Continuous Control Circuit Voltage capacitor trip is a static device with negligible maintenance and long life, while the dc bat- Current Amperes 120 Ac 240 Ac 48 Dc 125 Dc 250 Dc tery will require maintenance and replace- Non-inductive circuit interrupting capacity in amperes ment at some time in the future. Breaker Auxiliary Switch 20 15 10 16 10 5 TOC 20 15 10 16 10 5 Relays MOC Auxiliary Switch 20 15 10 16 10 5 Microprocessor-based or solid-state relays Inductive circuit interrupting capacity in amperes would generally require dc power or reliable uninterruptible ac supply for their logic circuits. Breaker Auxiliary Switch TOC 20 20 15 15 10 10 16 16 10 10 5 5 Auxiliary Switches MOC Auxiliary Switch 20 15 10 16 10 5 Optional circuit breaker and cell auxiliary switches are available where needed for interlocking or control of auxiliary devices. Typical applications and operation are described in Tables 8 and 9. Table 10: VCP-W Breaker Stored Energy Mechanism Control Power Requirements Spring Charge Motor UV Trip Voltage Range Ind. Run Time Close or Trip mA (Max.) Close Trip Light Amperes Seconds Amperes Amperes Auxiliary switch contacts from the circuit breaker mechanism are limited in number by the breaker control requirements usually to one “a” and two “b” contacts for ac control or two “a” and two “b” contacts for dc control. When additional auxiliary contacts are needed, the optional auxiliary relay or mechanism operated cell (MOC) switch is used. Two types of MOC switches are available: a. operates with breaker in connected position only. b. operates with breaker in connected ➀ Line-to-line connection only available. ➁ Refer to Cutler-Hammer for other voltages and kVA ratings. ➂ 150 kV BIL. position and test position. The optional truck operated cell (TOC) switch operates when the circuit breaker is levered into or out of the operating position. MOC and TOC switch contacts are not field convertible from “a” to “b” or “b” to “a”. Up to 3 MOC switches, each with 5a and 4b contacts, and 1 TOC with 4a and 5b contacts can Table 8: Breaker Auxiliary Switch Operating Times be provided in each breaker compartment. Auxiliary switch contacts are primarily used to provide interlocking in control circuits, switch indicating lights, auxiliary relays or other small loads. Suitability for switching remote auxiliary devices, such as motor heaters or solenoids, may be checked with the interrupting capacity listed in Table 9. Where higher interrupting capacities are required, Closed Open Closed
Cutler-Hammer May 2001 3 1 50/5 BUS 52 A Digitrip 3000 or FP5000 50/51 50/51N 50/51G A Ct Rating = 200% Feeder Full Load Digitrip 3000 or FP5000 Multifunction Microprocessor Overcurrent Trip Unit A – Alternate to 50/51N Protective Relays – Feeder Circuit 2 27/ 47 27/ 47X 1 1 1 50/5 Protective Relays – Induction Motors Below 1500 Hp Minimum Adequate Protection➀ 3 BUS 52 M Phase Ct Rating = 150% Full Load MP-3000 Multifunction Motor Protection Unit 27/47 – Undervoltage, Phase Sequence, and Unbalanced Voltage Relay (One Per Bus) 27/47x – Auxiliary Relay for Multimotor System ➀ For additional backup overcurrent/short circuit protection a Digitrip 3000 or FP500 Relay can be added in addition to the MP-3000. 1 Medium-Voltage Distribution Equipment Metal-Clad Switchgear – Drawout Vacuum Breakers (VCP-W) MP-3000 49 50 51 46 86 51G Relays – Device Numbers, Type and Function For AC Generator, Transformer and AC Motor Protection Industrial and Commercial Power System Applications ➀ 3 3 1 50/5 3 BUS 52 Protective Relays – Transformer Feeder A Digitrip 3000 or FP5000 1 50/51 50/51N 86 50/51G A 1 63 Protective Relays – Induction Motors Above 1500 Hp and Synchronous Motors➀ 3 86 87T Phase Ct Rating = 150% Full Load A - Prefered Scheme B - Alternate Scheme IQ-1000-II – Multifunction Motor Protection Unit 87 - Motor Differential Relay 86 - Lockout Relay 27/47 – Undervoltage, Phase Sequence, and Unbalanced Voltage Relay (One Per Bus) 27/47x – Auxiliary Relay for Multi-motor System 55 – Loss of Synchronism (Synchronous Motors Only) URTD – Universal RTD Interface Module B1-9 Ct Rating = 200% Full Load Digitrip 3000 or FP5000 Multifunction Microprocessor Overcurrent Trip Unit 87T – Transformer Differential Relay (Above 5 MVA) 86 – Lockout Relay 63 – Sudden Pressure Relay (Liquid Above 5 MVA) A – Alternate to 50/51N 2 27/47 27/ 47X 1 1 3 3 1 50/5 NEUT 3 ➁ Optional for MP-5000. 3 52 M BUS A B MP-3000/MP-5000 49 50 51 46 37 38 66 2/19 ➀ 74 50G 51G 86 3 ➁ 87 86 87 86 A B RTD U R T D 55
Page 1 and 2: Cutler-Hammer May 2001 Application
Page 3 and 4: Cutler-Hammer May 2001 26-inch Wide
Page 5 and 6: Cutler-Hammer May 2001 Application
Page 7: Cutler-Hammer May 2001 The 3-phase,
Page 11 and 12: Cutler-Hammer May 2001 Typical Weig
Page 13 and 14: Cutler-Hammer May 2001 Indoor 36-in
Page 15 and 16: Cutler-Hammer May 2001 Width = 42 [
Page 17 and 18: Cutler-Hammer May 2001 Ratings A. T
Page 19 and 20: Cutler-Hammer May 2001 for lifting

Cutler-Hammer - Eaton Canada

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