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ABB 41-101U, Instruction Leaflet, Page: 23 / 24

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ABB 41-101U Instruction Leaflet Download Page 23

Type CO Overcurrent Relay

41-101U

23

Figure 20:  Internal Schematic of the Double Trip  Circuit Closing Relay with Indicating Instantaneous Trip Unit.

Figure 21:  Internal Schematic of the Double Trip  Circuit Closing Relay with Indicating Instantaneous Trip Unit to Separate 

Terminals.

Sub 5
57D4526

Sub 3
184A061

Summary of Contents for 41-101U

Page 1: ......

Page 2: ...g 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 3 Control Spring Assembly 4 Disc 5 Stationary Contact Assembly 6 Magnetic Plugs 7 Permanent Magnet ...

Page 3: ...Type CO Overcurrent Relay 41 101U 3 Figure 3 E Type Electromagnet 1 Magnet Plugs 2 Tap Block 3 Tap Screw Figure 4 Indicating Instantaneous Trip Unit IIT Figure 5 Indicating Contactor Switch ICS ...

Page 4: ...fluxes produced by the electromagnet result in out of phase fluxes in the air gap The out of phase air gap fluxes produced cause a contact closing torque 2 2 INDICATING CONTACTOR SWITCH UNIT ICS The dc indicating contactor switch is a small clapper type device A magnetic armature to which leaf spring mounted contacts are attached is attracted to the magnetic core upon energization of the switch Wh...

Page 5: ...4 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 2 7 88 69 3 92 20 6 103 270 0 6 3 1 88 68 3 96 20 7 106 288 0 8 3 7 88 67 4 01 21 0 120 325 0 5 2 5 1 0 4 1 88 66 4 07 22 3 130 400 1 5 5 7 88 62 4 19 23 2 147 462 2 0 6 8 88 60 4 3...

Page 6: ...ONG TIME AND CO 9 DEFINITE MINIMUM TIME RELAYS 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 2 7 88 72 2 38 21 0 132 350 0 6 3 1 88 71 2 38 21 0 134 365 0 8 3 7 88 69 2 40 21 1 142 400 0 5 2 5 1 0 4 1 88 67 2 42 21 2 150 440 1 5 ...

Page 7: ...0 2 0 7 0 230 32 0 73 6 30 74 0 264 2 5 7 8 230 30 0 78 7 00 78 5 285 3 0 8 3 230 27 0 83 7 74 84 0 309 2 6 3 5 9 0 230 24 0 88 8 20 89 0 340 4 0 10 0 230 23 0 96 9 12 102 0 372 5 0 11 0 230 20 1 07 9 80 109 0 430 6 0 12 0 230 20 1 23 11 34 129 0 504 4 0 14 0 460 29 0 79 7 08 78 4 296 5 0 16 0 460 25 0 89 8 00 90 0 340 6 0 17 0 460 22 1 02 9 18 101 4 378 4 12 7 0 18 0 460 20 1 10 10 00 110 0 454 8...

Page 8: ...41 101U Type CO Overcurrent Relay 8 Figure 7 Typical Time Curves of the Type CO 2 Relay Sub 1 619584 ...

Page 9: ...Type CO Overcurrent Relay 41 101U 9 Figure 8 Typical Time Curves of the Type CO 5 Relay Sub 2 418245 ...

Page 10: ...41 101U Type CO Overcurrent Relay 10 Figure 9 Typical Time Curves of the Type CO 6 Relay Sub 2 418246 ...

Page 11: ...Type CO Overcurrent Relay 41 101U 11 Sub 2 418247 Figure 10 Typical Time Curves of the Type CO 7 Relay Denotes Change ...

Page 12: ...41 101U Type CO Overcurrent Relay 12 Figure 11 Typical Time Curves of the Type CO 8 Relay Sub 2 418248 ...

Page 13: ...Type CO Overcurrent Relay 41 101U 13 Figure 12 Typical Time Curves of the Type CO 9 Relay Sub 2 418249 ...

Page 14: ...41 101U Type CO Overcurrent Relay 14 Figure 13 Typical Time Curves of the Type CO 11 Relay Sub 2 288B655 ...

Page 15: ...taps requires connecting the lead located in front of the tap block to the desired setting by means of a screw connection 3 2 TRIP CIRCUIT CONSTANTS Contactor Switch 0 2 ampere tap 6 5 ohms dc resistance 2 0 ampere tap 0 15 ohms dc resistance 4 0 SETTINGS CAUTION Since the tap block screw on both the CO unit and IIT unit carries operating current be sure that the screws are turned tight In order t...

Page 16: ...tion of the 0 2 or 2 0 ampere setting This selection is made by connecting the lead located in front of the tap block to the desired setting by means of the connect ing screw 4 4 INDICATING INSTANTANEOUS TRIP IIT The IIT setting is the level of ac current at which it will pickup It should be set to coordinate with other de vices so it will never operate for a fault in protective zone where trippin...

Page 17: ...ts normal deflection Therefore with the stationary contact resting against the backstop the index mark is offset to the right of the O mark by ap proximately 020 The placement of the various time dial positions in line with the index mark will give operating times as shown on the respective time current curves For double trip relays the fol low on the stationary contacts should be approximately 1 ...

Page 18: ...old the armature closed against the core pin and gauge and adjust the stationary contacts such that they just make with the moving contact Both stationary con tacts should make at approximately the same time The contact follow will be approximately 1 64 to 3 64 6 2 CALIBRATION Use the following procedure for calibrating the relay if the relay has been taken apart for repairs or the ad justments di...

Page 19: ...e the main relay contacts and pass sufficient dc current through the trip circuit to close the contacts of the ICS This value of current should be not great er than the particular ICS tap setting being used The operation indicator target should drop freely 6 2 5 Indicating Instantaneous Trip Unit IIT The core screw must be adjusted to the value of pick up current desired The nameplate data will fu...

Page 20: ...RATING CURRENT OPERATING RELAY DIAL MULTIPLES OF TIME MULTIPLES OF TIME TYPE POSITION TAP VALUE SECONDS TAP VALUE SECONDS CO 2 6 3 0 57 20 0 22 CO 5 6 2 37 80 10 14 30 CO 6 6 2 2 46 20 1 19 CO 7 6 2 4 27 20 1 11 CO 8 6 2 13 35 20 1 11 CO 9 6 2 8 87 20 0 65 CO 11 6 2 11 27 20 0 24 For 50 Hertz CO 11 relay 20 times operating time limits are 0 24 10 5 ...

Page 21: ...Type CO Overcurrent Relay 41 101U 21 RESERVED FOR NOTES ...

Page 22: ...41 101U Type CO Overcurrent Relay 22 Denotes Change Figure 19 Outline and Drilling Plan for the Type CO Relay in the Type FT 11 Case Sub 19 57D7900 ...

Page 23: ...nal Schematic of the Double Trip Circuit Closing Relay with Indicating Instantaneous Trip Unit Figure 21 Internal Schematic of the Double Trip Circuit Closing Relay with Indicating Instantaneous Trip Unit to Separate Terminals Sub 5 57D4526 Sub 3 184A061 ...

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 Revision U ABB ...

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