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ABB CKO-5 Manual
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ABB CKO-5 Manual

ABB CKO-5 Manual

Overcurrent relay
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Summary of Contents for ABB CKO-5

  • Page 2 41-101.3A Type CKO Overcurrent Relay switch, which allows the operation indicator target to spring type clamp. The spring adjuster is located on drop. the underside of the bridge and is attached to the moving contact arm by a spiral spring. The spring ad- The front spring, in addition to holding the target, pro- juster is also held in place by a spring type clamp.
  • Page 3 Type CKO Overcurrent Relay 41-101.3A The indicating contactor switch has two taps that Time provide a pickup setting of 0.2 or 2 amperes. To Characteristic Designation change taps requires connecting the lead located in Short Time front of the tap block to the desired setting by means Long Time of a screw connection.

  • Page 4: Energy Requirements

    41-101.3A Type CKO Overcurrent Relay ENERGY REQUIREMENTS INSTANTANEOUS OVERCURRENT UNIT OPERATING CURRENT CIRCUIT- 60 HERTZ ø ø †† †† AMPERE RANGE VA AT TAP VALUE P.F. ANGLE VA AT 4 AMPS P.F. ANGLE .5-2 1.25 6 . 0 0.93 4-16 0.37 0.24 0.43...
  • Page 5 Type CKO Overcurrent Relay 41-101.3A ENERGY REQUIREMENTS TYPE CKO-2 TIME OVERCURRENT UNITS †† 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 6 41-101.3A Type CKO Overcurrent Relay ENERGY REQUIREMENTS TYPE CKO-5 AND TYPE CKO-6 TIME OVERCURRENT UNITS †† VOLT AMPERES CONTINUOUS ONE SECOND POWER AT 3 TIMES AT 10 TIMES AT 20 TIMES † AMPERE RATING RATING FACTOR TAP VALUE TAP VALUE...
  • Page 7 Type CKO Overcurrent Relay 41-101.3A ENERGY REQUIREMENTS TYPE CKO-8 AND TYPE CKO-9 TIME OVERCURRENT UNITS †† 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 8 41-101.3A Type CKO Overcurrent Relay Sub 3 418244 Figure 2. Typical Time Curves of the Time-Overcurrent Unit of the Short Time (2) Relays.
  • Page 9 Type CKO Overcurrent Relay 41-101.3A Sub 2 418245 Figure 3. Typical Time Curves of the Time-Overcurrent Unit of the Long Time (5) Relays.
  • Page 10 41-101.3A Type CKO Overcurrent Relay *Sub 3 418246 Figure 4. Typical Time Curves of the Time-Overcurrent Unit of the Definite Time (6) Relays.
  • Page 11 Type CKO Overcurrent Relay 41-101.3A *Sub 3 418247 Figure 5. Typical Time Curves of the Time-Overcurrent Unit of the Moderately Inverse (7) Relays.
  • Page 12 41-101.3A Type CKO Overcurrent Relay Sub 2 418248 Figure 6. Typical Time Curves of the Time-Overcurrent Unit of the Inverse (8) Relays.
  • Page 13 Type CKO Overcurrent Relay 41-101.3A Sub 2 418249 Figure 7. Typical Time Curves of the Time-Overcurrent Unit of the Very Inverse (9) Relays.
  • Page 14 41-101.3A Type CKO Overcurrent Relay Sub 2 288B655 Figure 8. Typical Time Curves of the Time-Overcurrent Unit of the Extremely Inverse (11) Relays.
  • Page 15 Type CKO Overcurrent Relay 41-101.3A *Sub 4 629A576 Figure 9. Maximum Pickup and Dropout Time Curves for Instantaneous Overcurrent Unit. time dial position or 4 tap setting, 0.6 seconds at 6 In order to avoid opening current transformer circuits when changing taps under load, the re- times tap value current).

  • Page 16: Installation

    41-101.3A Type CKO Overcurrent Relay Instantaneous Overcurrent Unit (I) or inserted by locking two nuts on the stud and then turning the proper nut with a wrench. The only setting required is the pickup current setting which is made by means of the connector screw lo- For detail information on the FT case refer to I.L.41- cated on the tap plate.
  • Page 17 Type CKO Overcurrent Relay 41-101.3A c. Time Curve CALIBRATION Table 1 shows the time curve calibration points for Use the following procedure for calibrating the relay the various types of relays. With the time dial set to if the relay has been taken apart for repairs or the ad- the indicated position, apply the currents specified justments have been disturbed.
  • Page 18 41-101.3A Type CKO Overcurrent Relay...
  • Page 19 Type CKO Overcurrent Relay 41-101.3A Sub 2 1452C84 Figure 11. External Schematic of the CKO Relay...
  • Page 20 41-101.3A Type CKO Overcurrent Relay 7.0 TIME OVERCURRENT UNIT (CO) c. Time Curve Calibration Install the permanent magnet. Apply the indicated a. Contacts current per Table 1 for permanent magnet adjust- The index mark on the movement frame will coincide ment (e.g., CKO-8, 2 times tap value) and measure with the "0"...

  • Page 21: Renewal Parts

    Type CKO Overcurrent Relay 41-101.3A make with the moving contact. Both stationary con- cuit to close contacts of the (ICS/I). This value of tacts should make at approximately the same time. current should not be greater than the particular The contact follow will be approximately 1/ 64 " to (ICS/I) tap setting being used.
  • Page 23 Type CKO Overcurrent Relay 41-101.3A THIS SPACE RESERVED FOR NOTES...
  • 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...

This manual is also suitable for:

Cko-6Cko-7Cko-8Cko-9