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Summary of Contents for CKO-5

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Page 2: ...ge is used for mount ing the adjustable stationary contact housing The stationary contact housing is held in position by a spring type clamp The spring adjuster is located on the underside of the bridge and is attached to the moving contact arm by a spiral spring The spring ad juster is also held in place by a spring type clamp With the contact closed the electrical connection is made through the ...

Page 3: ...aps refer to the section under ad justments The pickup and dropout time curves for the instantaneous overcurrent units is shown in Fig ure 9 TIME OVERCURRENT UNIT Range Taps 5 2 5 0 5 0 6 0 8 1 0 1 5 2 0 2 5 2 6 2 2 5 3 3 5 4 5 6 4 12 4 5 6 7 8 1 0 1 2 The tap value is the minimum current required to just close the relay contacts This time vs current characteristics for the time overcurrent unit a...

Page 4: ... 51 2 4 51 6 1 7 45 1 2 45 4 16 8 1 8 40 0 7 40 9 1 9 38 0 6 38 1 2 2 2 34 0 37 34 1 6 2 5 30 0 24 31 1 0 1 7 28 0 43 28 1 5 2 4 21 0 27 21 2 0 3 1 16 0 20 17 10 40 2 4 3 6 15 0 15 15 3 0 4 2 12 0 11 13 4 0 4 9 11 0 08 12 2 0 6 6 31 0 40 31 3 0 9 3 24 0 25 24 20 80 4 0 12 0 20 0 18 20 4 8 13 5 18 0 14 18 6 0 15 9 16 0 10 16 8 0 19 2 15 0 07 15 CONTINUOUS RATING ONE SECOND RATING RANGE AMPERES AMPE...

Page 5: ... 2850 2 0 3 1 110 59 5 04 38 7 262 800 2 5 4 0 110 55 5 13 39 8 280 920 3 0 4 4 110 51 5 37 40 8 312 1008 2 6 3 5 4 8 110 47 5 53 42 8 329 1120 4 0 5 2 110 45 5 72 46 0 360 1216 5 0 5 6 110 41 5 90 50 3 420 1500 6 0 6 0 110 37 6 54 54 9 474 1800 4 0 7 3 230 65 4 92 39 1 268 848 5 0 8 0 230 50 5 20 42 0 305 1020 6 0 8 8 230 47 5 34 44 1 330 1128 4 12 7 0 9 6 230 46 5 53 45 8 364 1260 8 0 10 4 230 4...

Page 6: ...13 7 230 57 4 38 26 5 183 624 4 16 0 460 65 4 00 22 4 126 376 5 18 8 460 63 4 15 23 7 143 450 6 19 3 460 61 4 32 25 3 162 531 4 12 7 20 8 460 59 4 35 26 4 183 611 8 22 5 460 56 4 40 27 8 204 699 1 0 25 0 460 53 4 60 30 1 247 880 1 2 28 0 460 47 4 92 35 6 288 1056 CKO 7 TIME OVERCURRENT UNITS VOLT AMPERES CONTINUOUS ONE SECOND POWER AT AT 3 TIMES AT 10 TIMES AT 20 TIMES AMPERE RATING RATING FACTOR ...

Page 7: ...VERCURRENT UNITS VOLT AMPERES CONTINUOUS ONE SECOND POWER AT AT 3 TIMES AT 10 TIMES AT 20 TIMES AMPERE RATING RATING FACTOR TAP VALUE TAP VALUE TAP VALUE TAP VALUE RANGE TAP AMPERES AMPERES ANGLE ø CURRENT CURRENT CURRENT CURRENT 0 5 1 7 56 36 0 72 6 54 71 8 250 0 6 1 9 56 34 0 75 6 80 75 0 267 0 8 2 2 56 30 0 81 7 46 84 0 298 0 5 2 5 1 0 2 5 56 27 0 89 8 30 93 1 330 1 5 3 0 56 22 1 13 10 04 115 5...

Page 8: ...41 101 3A Type CKO Overcurrent Relay 8 Figure 2 Typical Time Curves of the Time Overcurrent Unit of the Short Time 2 Relays 418244 Sub 3 ...

Page 9: ...Type CKO Overcurrent Relay 41 101 3A 9 Figure 3 Typical Time Curves of the Time Overcurrent Unit of the Long Time 5 Relays 418245 Sub 2 ...

Page 10: ...41 101 3A Type CKO Overcurrent Relay 10 Figure 4 Typical Time Curves of the Time Overcurrent Unit of the Definite Time 6 Relays 418246 Sub 3 ...

Page 11: ...Type CKO Overcurrent Relay 41 101 3A 11 418247 Sub 3 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 12 Figure 6 Typical Time Curves of the Time Overcurrent Unit of the Inverse 8 Relays 418248 Sub 2 ...

Page 13: ...Type CKO Overcurrent Relay 41 101 3A 13 Figure 7 Typical Time Curves of the Time Overcurrent Unit of the Very Inverse 9 Relays 418249 Sub 2 ...

Page 14: ...41 101 3A Type CKO Overcurrent Relay 14 Figure 8 Typical Time Curves of the Time Overcurrent Unit of the Extremely Inverse 11 Relays 288B655 Sub 2 ...

Page 15: ...nt transformer circuits when changing taps under load the re lay must first be removed from the case Chassis operating shorting switches on the case will short the secondary of the current transformer The taps should then be changed with the relay outside of the case and then reinserted into the case 4 2 Instantaneous Reclosing The factory adjustment of the CO unit contacts pro vides a contact fol...

Page 16: ...as required for poorly grounded or insulating panels Other electrical con nections may be made directly to the terminal by means of screws for steel panel mounting or to the terminal stud furnished with the relay for thick panel mounting The terminal stud may be easily removed or inserted by locking two nuts on the stud and then turning the proper nut with a wrench For detail information on the FT...

Page 17: ... material for cleaning contacts is not recommended because of the danger of embedding small particles in the face of the soft silver and thus impairing the contact 6 3 CALIBRATION Use the following procedure for calibrating the relay if the relay has been taken apart for repairs or the ad justments have been disturbed This procedure should not be used unless it is apparent that the re lay is not i...

Page 18: ...41 101 3A Type CKO Overcurrent Relay 18 Figure 10 Diagram of Test Connections of the Time Overcurrent Unit 1455C31 Sub 1 ...

Page 19: ...Type CKO Overcurrent Relay 41 101 3A 19 Figure 11 External Schematic of the CKO Relay 1452C84 Sub 2 ...

Page 20: ...easure the operating time Adjust the permanent magnet keeper until the operating time corresponds to the value of Table 1 Apply the indicated current per Table 1 for the elec tromagnet plug adjustment e g CKO 8 20 times tap value and measure the operating time Adjust the proper plug until the operating time corresponds to the value in Table 1 Withdrawing the left hand plug front view increases the...

Page 21: ...n indicator target should drop freely bringing the letter T into view b Close contacts of instantaneous overcurrent unit I Pass sufficient dc current through the trip cir cuit to close contacts of the ICS I This value of current should not be greater than the particular ICS I tap setting being used The operation indi cator target should drop freely bringing the letter I into view 8 0 RENEWAL PARTS...

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Page 23: ...Type CKO Overcurrent Relay 41 101 3A 23 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 IL 41 101 3 Revision A ABB ...

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