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41-181.2K

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Figure 9. Element Assembly for CM Relay (Front View)

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Summary of Contents for CM

Page 1: ...has a pair of electromagnets operat ing on a single disc The disc is damped by a perma nent magnet Each disc carries its own set of contacts with the two sets being connected in paral lel in order that either disc may close the trip circuit The electromagnet pair are mounted face to face on opposite sides of the disc and so connected that the electrical torque of one electromagnet opposes that of ...

Page 2: ...41 181 2K 2 Figure 1a Non Tapped Type CM Relay without case Front View Figure 1b Non Tapped Type CM Relay without case Rear Vies ...

Page 3: ...3 41 181 2K Figure 2a Type CM Tapped Relay without case Front View Figure 2b Type CM Tapped Relay without case Rear View ...

Page 4: ...ont of the switch which allows the operation indicator target to drop 3 0 CHARACTERISTICS The non tapped type CM relay has a minimum pickup current of one ampere and a continuous ther mal rating of seven amperes The tapped CM relay has a minimum pickup of 1 2 or 3 amperes depend ing on the tap setting and a continuous of 7 amperes The minimum pickup current is defined as the pickup current of each...

Page 5: ...y means of the four mounting holes on the flange for the semi flush type FT case Either the stud or the mounting screws may be utilized for grounding the relay Exter nal toothed washers are provided for use in the loca tions shown on the outline and drilling plan to facilitate making a good electrical connection between the relay case its mounting screws or studs and the relay panel Ground wires a...

Page 6: ...y one ampere through the front and rear electromagnets simultaneously The moving contact should remain substantially midway between the stationary contacts A similar check should be made utilizing six amperes 4 Time Curve Contact travel is from balanced position to either the right or left stationary contacts Electromagnets are to be energized alone zero restraint Apply ten amperes and note that c...

Page 7: ...has been taken apart for repairs or the adjustments disturbed This procedure should not be used until it is apparent that the relay is not in proper working order See Acceptance Check 8 1 MAIN UNITS For all electrical checks refer to test diagram figure 5 For tapped CM put tap screw in one amp tap setting 1 Balance Setting a Mechanical balance adjust spiral spring until moving contact is located s...

Page 8: ...his value of current should not be greater than the particular ICS tap setting being used The operation indicator target should drop freely 8 3 AC INDICATING CONTACTOR SWITCH ACS Close the main relay contacts and pass sufficient ac current through the trip circuit to close the contacts of the ACS This value of current should not be greater than the particular ACS rated operating current being used...

Page 9: ...9 41 181 2K Figure 7 Internal Schematic of the Non Tapped Type CM Relay in the Type FT 31 Case Figure 8 Internal Schematic of the Tapped Type CM Relay in the Type FT 31 Case 187A232 762A812 ...

Page 10: ...41 181 2K 10 Figure 9 Element Assembly for CM Relay Front View ...

Page 11: ...11 41 181 2K Figure 10 External Schematic Diagram of the Type CM Relay in the Type FT 31 Case Sub 4 188A144 Figure 10 External Schematic Diagram of the Type CM Relay in the Type FT 31 Case ...

Page 12: ...ion Inc 4300 Coral Ridge Drive Coral Springs Florida 33065 TEL 954 752 6700 FAX 954 345 5329 visit our website at www abbus com papd 41 181 2K Figure 11 External Schematic Diagram of the Type CM Relay in the Type FT 31 Case 57S902 ...

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