ABB CA-26 Instruction Leaflet Download Page 2 | Manualshive

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41-337.31B

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Courtesy of NationalSwitchgear.com

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Summary of Contents for CA-26

Page 1: ...fety classification of the electric equipment and systems in nuclear power generating stations that are essential to emergency shutdown of the reactor containment isolation cooling of the reac tor and heat removal from the containment and reac tor or otherwise are essential in preventing significant release of radioactive material to the environment The current transformers should not saturate whe...

Page 2: ...41 337 31B 2 Figure 1 CA 16 Front View Figure 2 CA 16 Rear View Courtesy of NationalSwitchgear com ...

Page 3: ...de rod by two small nuts Its position determines the pick up current of the element The auto transformer is designed to saturate at high values of current to limit the amount of current to the contactor switch 2 3 1 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 attract...

Page 4: ... CA 16 To determine the ac connections identify each pri mary circuit as either a source or feeder As defined here a feeder contributes only a small por tion of the total fault current contribution for a bus fault Otherwise the circuit is a source Next lump a number of feeders into a feeder group by paralleling feeder ct s taking the precaution that each feeder group has less than 14 amperes load ...

Page 5: ...eres 6 2 Routine Maintenance All contacts should be periodically cleaned A contact burnisher is recommended for this purpose S 182A836H01 The use of abrasive 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 7 0 CALIBRATION Use the following procedure for calibrating the relay if the re...

Page 6: ...d 15 Operate the moving element by hand and allow the current to hold the moving contact disc against the stationary contacts Now screw up the core screw slowly This causes the plunger to move up compressing the spring until a point of maximum deflection is reached Further upward motion will cause the plunger to drop part way out of the coil thus diminishing the spring pressure on the contacts By ...

Page 7: ...41 337 31B 7 This Page Reserved for Notes Courtesy of NationalSwitchgear com ...

Page 8: ...41 337 31B 8 Figure 3 Internal Schematic of the Type CA 16 Bus Relay Sub 1 3532A95 Courtesy of NationalSwitchgear com ...

Page 9: ...41 337 31B 9 Figure 4 Typical Time Curves of the CA 16 Differential Relay Sub 1 537956 Courtesy of NationalSwitchgear com ...

Page 10: ...41 337 31B 10 Figure 5 Typical Burden Characteristics of the Types CA 16 and CA 26 Relays Curve 537957 Courtesy of NationalSwitchgear com ...

Page 11: ...41 337 31B 11 Figure 6 External Schematic of One Set of Type CA 16 Relays for the Protection of a Three and Four Circuit Bus Sub 5 187A424 Courtesy of NationalSwitchgear com ...

Page 12: ...41 337 31B 12 Figure 7 External Schematic of the Type CA 16 Relays for Protection of Six Circuit Bus with Three Feeder Groups Sub 5 187A425 Courtesy of NationalSwitchgear com ...

Page 13: ...41 337 31B 13 Figure 8 Diagram of Test Connections for the CA 16 Relay Sub 4 187A426 Courtesy of NationalSwitchgear com ...

Page 14: ...41 337 31B 14 Figure 9 Percentage Slope Curve of the CA 16 Relay with One Restraint Winding Sub 1 849A450 Courtesy of NationalSwitchgear com ...

Page 15: ...41 337 31B 15 Figure 10 Percentage Slope Curve of the CA 16 Relay with Six Restraint Windings in Series Sub 2 849A343 Courtesy of NationalSwitchgear com ...

Page 16: ...oral Ridge Drive Coral Springs Florida 33065 TEL 954 752 6700 FAX 954 345 5329 visit our website at www abbus com papd 41 337 31B Figure 11 Outline and Drilling for the CA 16 Relay in FT 32 Case Sub 1 3519A69 Courtesy of NationalSwitchgear com ...

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