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ABB 41-101U Instruction Leaflet
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ABB 41-101U Instruction Leaflet

ABB 41-101U Instruction Leaflet

Type co overcurrent relay
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Summary of Contents for ABB 41-101U

  • Page 2 41-101U Type CO Overcurrent Relay Figure 1: Type CO Relay Without Case. 1 = Indicating Instantaneous Trip (IIT). 2 = IIT Adjusting Screw. 3 = Indicating Contactor Switch (ICS). 4 = Indicating Contactor Switch Tap Block. Figure 2: Time Overcurrent Unit (Front View). 1 = Tap block. 2 = Time Dial.
  • Page 3 Type CO Overcurrent Relay 41-101U Figure 3: “E” Type Electromagnet. Figure 4: Indicating Instantaneous Trip Unit (IIT). 1= Magnet Plugs. 2= Tap Block. 3= Tap Screw. Figure 5: Indicating Contactor Switch (ICS).

  • Page 4: Construction And Operation

    41-101U Type CO Overcurrent Relay 2.0 CONSTRUCTION AND OPERATION INDICATING CONTACTOR SWITCH UNIT (ICS) The type CO relays consist of an overcurrent unit (CO), an indicating contactor switch (ICS), and an in- The dc indicating contactor switch is a small clapper dicating instantaneous trip unit (IIT) when required.
  • Page 5 Type CO Overcurrent Relay 41-101U ENERGY REQUIREMENTS TYPE CO-2 RELAY VOLT AMPERES** Continuous One Second Power At 3 Times At 10 Times At 20 Times Ampere Rating Rating* Factor Tap Value Tap Value Tap Value Tap Value ø Range (Amperes)
  • Page 6 41-101U Type CO Overcurrent Relay ENERGY REQUIREMENTS CO-7 MODERATELY INVERSE TIME RELAY VOLT AMPERES** Continuous One Second Power At 3 Times At 10 Times At 20 Times Ampere Rating Rating* Factor Tap Value Tap Value Tap Value Tap Value ø...
  • Page 7 Type CO Overcurrent Relay 41-101U ENERGY REQUIREMENTS TYPE CO-11 RELAY VOLT AMPERES** Continuous One Second Power At 3 Times At 10 Times At 20 Times Ampere Rating Rating* Factor Tap Value Tap Value Tap Value Tap Value ø Range (Amperes)
  • Page 8 41-101U Type CO Overcurrent Relay Sub 1 619584 Figure 7: Typical Time Curves of the Type CO-2 Relay...
  • Page 9 Type CO Overcurrent Relay 41-101U Sub 2 418245 Figure 8: Typical Time Curves of the Type CO-5 Relay...
  • Page 10 41-101U Type CO Overcurrent Relay Sub 2 418246 Figure 9: Typical Time Curves of the Type CO-6 Relay...
  • Page 11 Type CO Overcurrent Relay 41-101U *Sub 2 418247 Figure 10: Typical Time Curves of the Type CO-7 Relay *Denotes Change...
  • Page 12 41-101U Type CO Overcurrent Relay Sub 2 418248 Figure 11: Typical Time Curves of the Type CO-8 Relay...
  • Page 13 Type CO Overcurrent Relay 41-101U Sub 2 418249 Figure 12: Typical Time Curves of the Type CO-9 Relay.
  • Page 14 41-101U Type CO Overcurrent Relay Sub 2 288B655 Figure 13: Typical Time Curves of the Type CO-11 Relay.
  • Page 15 Type CO Overcurrent Relay 41-101U Sub 7 Sub 3 57D4525 57D4524 Figure 14: Internal Schematic of the Double Trip Circuit Figure 15: Internal Schematic of the Single Trip Circuit- Closing Relay. For the Single Trip Relay the Closing Relay with Indicating Instantaneous Circuits Associated with Terminal 2 are Omit- Trip Unit.

  • Page 16: Installation

    41-101U Type CO Overcurrent Relay CO UNIT should be a minimum. This condition is obtained by loosening the stationary contact mounting screw, re- The overcurrent unit settings can be defined either moving the contact plate and then replacing the plate by tap setting and time dial position or by tap setting with the bent end resting against the contact spring.

  • Page 17: Adjustments And Maintenance

    Type CO Overcurrent Relay 41-101U INDICATING INDICATING CONTACTOR CONTACTOR SWITCH SWITCH INDUCTION UNIT INDUCTION UNIT INDUCTION UNIT INDUCTION UNIT LAG COIL LAG COIL INDICATING INSTANTANEOUS UNIT RED HANDLE RED HANDLE TEST SWITCH TEST SWITCH CURRENT CURRENT TEST JACK TEST JACK...
  • Page 18 41-101U Type CO Overcurrent Relay 3% and should return to the backstop at tap value CALIBRATION current minus 3%. Use the following procedure for calibrating the relay if the relay has been taken apart for repairs or the ad- 6.1.3 Time Curve justments disturbed.

  • Page 19: Routine Maintenance

    Type CO Overcurrent Relay 41-101U the operating time. Adjust the permanent magnet 6.2.5 Indicating Instantaneous Trip Unit (IIT) keeper until the operating time corresponds to the The core screw must be adjusted to the value of value of Table 2.
  • Page 20 41-101U Type CO Overcurrent Relay Table 2 TIME CURVE CALIBRATION DATA - 50 & 60 HERTZ PERMANENT MAGNET ADJUSTMENT ELECTROMAGNET PLUGS TIME CURRENT OPERATING CURRENT OPERATING RELAY DIAL (MULTIPLES OF TIME (MULTIPLES OF TIME TYPE POSITION TAP VALUE) SECONDS TAP VALUE)
  • Page 21 Type CO Overcurrent Relay 41-101U RESERVED FOR NOTES...
  • Page 22 41-101U Type CO Overcurrent Relay...
  • Page 23 Type CO Overcurrent Relay 41-101U Sub 5 57D4526 Figure 20: Internal Schematic of the Double Trip Circuit Closing Relay with Indicating Instantaneous Trip Unit. Sub 3 184A061 Figure 21: Internal Schematic of the Double Trip Circuit Closing Relay with Indicating Instantaneous Trip Unit to Separate...
  • Page 24 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...