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ABB CW Series Instruction Leaflet

Power relay
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Summary of Contents for ABB CW Series

  • Page 2 41-241.3L Figure 1. Time-Power Unit. 2. Indicating Contactor Switch (ICS). Note: Phase shifting resistor is mounted in rear. Indicating Contactor Switch Unit (ICS) Volts ( 3 single phase watts ) The dc indicating contactor switch is a small clapper Line-to type device.

  • Page 3: Installation

    41-241.3L Sub 1 Sub 1 Sub 2 183A776 183A776 629A173 Figure 2. Internal Schematic of the Type CW Relay in the Figure 3. Internal Schematic of the Type CW Relay with Type FT 11 Case. SPDT Contacts in Type FT 11 Case. The indicating contactor switch has two taps that provide pickup setting of 0.2 or 2 Amperes.

  • Page 4: Energy Requirements

    41-241.3L This allows the motor to be accelerated, and the field Assume: breaker closed before the CW is operative. = ct ratio = 600:5 = 120 Note that the use of field breaker 41a switch control, = vt ratio = 4200:120 = 35 prevents loss of field detection on accidental field = power = 1000 primary kilowatts...

  • Page 5: Adjustment And Maintenance

    41-241.3L ADJUSTMENT AND MAINTENANCE the backstop at tap value minus 3%. The relay should be calibrated with 10 times tap value at the The proper adjustments to insure correct operation number six time dial position. Check several points of this relay have been made at the factory and should not be disturbed after receipt by the cus- on the typical time curves.
  • Page 6 41-241.3L Sub 1 184A600 Figure 5. Typical 60 Hertz Time Curves of the 20-120 and 35-200 Watt Type CW Relay.
  • Page 7 41-241.3L Sub 1 184A601 Figure 6. Typical 60 Hertz Time Curves of the 100-600 and 175-1000 Watt Type CW Relay.
  • Page 8 41-241.3L Sub 6 184A811 Figure 7. External Schematic of Three Type CW Relays on a Three-Phase System. Note: For balanced Three Phase Conditions only one CW Relay is required. Sub 3 Sub 3 849A303 774B831 Figure 8. External Schematic of One CW Relay for Figure 9.
  • Page 10 41-241.3L THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 11 41-241.3L THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 12 ABB Inc. 4300 Coral Ridge Drive Coral Springs, Florida 33065 Telephone: +1 954-752-6700 Fax: +1 954-345-5329 www.abb.com/substation automation...