ABB CIRCUIT SHIELD 49/50/51 Instructions Manual Download Page 1 | Manualshive

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Summary of Contents for CIRCUIT SHIELD 49/50/51

Page 1: ...Jl 1111 1 1 IB 7 2 1 7 4 Issue D INSTRUCTIONS Overcurrent Relay for Motor Protection CIRCUIT 9 SHIELD en TYPES 49 50 51 49 50 49 Catalog Series 214 Standard Case Catalog Series 414 Drawout Test Case...

Page 2: ...g through the relay cover PRECAUTIONS The following precautions should be taken when applying these relays I Incorrect wiring may result in damage Be sure wiring agrees with the connection diagram for...

Page 3: ...fthe contacts are set in the hand reset mode the output contacts will latch and must be manually reset by depressing the target reset push button located on the front panel ofthe relay 3 SETTINGS CURR...

Page 4: ...ged in one case the three functions are individually adjustable allowing optimum protection without compromise among the various elements Settings are easily made with all adjustments on the front pan...

Page 5: ...rting times PHASE FAULT PROTECTION Function 50 This instantaneous element is adjustable from 4 to 16 multiples of the overload unit setting The operating time of this unit is such that on fused motor...

Page 6: ...For Hand Reset Or SelfReset Continuous Break 120 vac at 125 vdc at 250 vdc 30 amperes 5 2 30 amperes 5 0 3 30 amperes 5 0 1 Note tolerances shown are with respect to printed dial markings on the relay...

Page 7: ...Typical External Connections 1604148 Motor Overload Relay a Typea 49 49 50 49 50151 Or11wout Test Case Reset 1npu1 For Tesr Use Only Exlernal Resistor Supplied With Relay Internal Connections IT 8 38...

Page 8: ...et at 1 2 times full load amps Locked Rotor Unit set at 5 second curve Instantaneous Unit Set at 7 2 times full load amps 1000 1000 100 a 8 Locked Rotor 10 Ill c I 1 f4 Locked Rotor Unit 511 l 01 0 l...

Page 9: ...49 50 51 ___ IJo s 10 __ 600 9 ___ 8 1 6 5 300 4 i 3 5 I 2 A 0 Iii II s 1 80 u a Ill flt 1 6 Ill 5 4 30 i 4 3 2 1 09 08 5 07 06 4 05 3 04 03 1 2 02 1 1 01 O N _ GOG J li g N CURRElllT 1111 MULTIPLES...

Page 10: ...03 02 01 9 0 MARCH 1977 50 51 I Motor Overcurrent Relay I I TIME CURRENT CHARACTERISTICS I I 1800 Iii CIRCUIT SHIELD II Type49 50 51 I 600 30 300 10 I I 6 60 0 w J u 30 u nllUSl ll RI II iln loo MUL I...

Page 11: ...ly made to the Drawout relay unit by means of standard banana plugs Current connections are made to the vertical posts at the blade assemblies Control power and output connections are made at the rear...

Page 12: ...the test current slowly until the pickup lamp begins flashing Note the test current Remember the l 5x factor when testing with a single phase source Pickup should be within 10 ofthe tap setting 3 37 4...

Page 13: ...Overcurrent Relay tr TEST SET 3 IAMPSf fTIME Rf I STDP 1 Resistor supplied with Relay Typical Test Connections 1 For single phase testing as shown adjust current to 1 5 times desired test current leve...

Page 14: ...signed to provide a field selectable link for changing the output contacts to either self reset or manually reset Earlier models had to be purchased with preselected output contact modes Drawout circu...

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