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ABB CA-16, Instructions Manual

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ABB CA-16 Instructions Manual Download Page 16

Printed in U.S.A

.

ABB Automation 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

Sub 16

57D7903

Figure 15: Outline and Drilling for the CA-16 and CA-26 Relays in FT-32 Case.

Courtesy of NationalSwitchgear.com

Summary of Contents for CA-16

Page 1: ...nt transformer accuracy class C voltage Iext maximum external fault current in secondary RMS amperes let Iext 100 if max external fault current is less than 100A Rs current transformer secondary wind...

Page 2: ...41 337 3L 2 Photo Figure 1 Types CA 16 Relay front view Photo Figure 2 Types CA 16 Relay rear view Courtesy of NationalSwitchgear com...

Page 3: ...se fluxes cause a contact opening torque 2 2 Operating Circuit The operating circuit consists of an auto transformer and an operating element The primary of the auto transformer which is the whole win...

Page 4: ...fastened to the bottom of the guide rod by two small nuts Its position determines the pick up current of the ele ment The auto transformer is designed to saturate at high values of current to limit t...

Page 5: ...ent transformers connected to the bus and the oper ating circuit is energized in accordance with the current flowing in the differential connection of the current transformers A current of 5 amperes i...

Page 6: ...es of the current transformers involved The time of operation of the relays is shown in Figure 6 4 2 CA 26 Transformer Relay The type CA 26 transformer differential relay includes an indicating instan...

Page 7: ...feeder ct s taking the precau tion that each feeder group has less than 14 amperes load current restraint coil continuous rating If the bus reduces to more than four circuits parallel ct s until only...

Page 8: ...9 connections where there are more than three sources the source ct s should be paralleled to reduce the effective number of source connections to three The four circuit bus connections of Figure 8 ar...

Page 9: ...of the four mounting holes on the flange for semi flush mounting or by means of the rear mounting stud or studs for projection mount ing Either a mounting stud or the mounting screws may be utilized f...

Page 10: ...acts and target indication should occur at approximately the same instant Position the stationary contact for a minimum of 1 32 inch wipe The bridging moving contact should touch both stationary conta...

Page 11: ...ve Fault Detector Loosen the lock nut at the top of the element and run the core screw down until it is flush with the top of the lock nut Back off the Micarta disc by loosening the two lock nuts Appl...

Page 12: ...41 337 3L 12 Sub 2 408C507 Figure 14 External Schematic of the Type CA 26 Relay for Wye Wye Delta Transformer Protection Sub 2 408C507 Courtesy of NationalSwitchgear com...

Page 13: ...41 337 3L 13 This Space Reserved for Notes Courtesy of NationalSwitchgear com...

Page 14: ...41 337 3L 14 This Space Reserved for Notes Courtesy of NationalSwitchgear com...

Page 15: ...41 337 3L 15 This Space Reserved for Notes Courtesy of NationalSwitchgear com...

Page 16: ...ral Ridge Drive Coral Springs Florida 33065 TEL 954 752 6700 FAX 954 345 5329 visit our website at www abbus com papd Sub 16 57D7903 Figure 15 Outline and Drilling for the CA 16 and CA 26 Relays in FT...

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