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Courtesy of NationalSwitchgear.com

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Summary of Contents for CO

Page 1: ...en value When no suitable station battery is available the circuit opening type relay in conjunction with a c series trip coil is used to trip the circuit breaker CONTENTS This instruction leaflet app...

Page 2: ...r target to drop The relays are available in the following current range TAPS RANGE 4 5 6 7 8 10 12 4 1 2 The front spring in addition to holding the target provides restraint for the armature and thu...

Page 3: ...38 7 262 2 0 3 1 no 800 5 13 39 8 920 2 5 55 280 4 0 110 5 37 3 0 110 51 42 8 312 4 4 1008 2 6 3 5 5 53 4 8 110 42 8 47 329 1120 5 72 4 0 5 2 45 46 0 no 360 1216 5 90 50 3 5 0 5 6 41 420 1500 no 6 0 6...

Page 4: ...INVERSE TIME RELAY 60 HERTZ VOLT AMPERES XA FOR 50 HZ AT 3 TIMES AT 10 TIMES TAP VALUE TAP VALUE CURRENT CURRENT A 0 88 AT 20 TIMES TAP VALUE CURRENT A 0 91 AT ONE SECOND RATING AMPERES POWER FACTOR A...

Page 5: ...OR 50 HZ AT 20 TIMES TAP VALUE CURRENT A 0 91 AT 3 TIMES AT 10 TIMES TAP VALUE TAP VALUE CURRENT A 0 9 AT POWER FACTOR ANGLE o TAP VALUE CURRENT A 0 86 CONTINUOUS RATING AMPERES ONE SECOND RATING AMPE...

Page 6: ...I L 1 103H OFig 3 Typical Time Curve of the Type CO 2 Relay 6 Courtesy of NationalSwitchgear com...

Page 7: ...I L 41 103H Fig 4 Typical Time Curve of the Type CO 5 Relay 1 Courtesy of NationalSwitchgear com...

Page 8: ...I L 41 103H Fig 5 Typical Time Curve of The Type CO 6 Relay 8 Courtesy of NationalSwitchgear com...

Page 9: ...I L 41 103H Fig 6 Typical Time Curve of the Type CO 7 Relay 9 Courtesy of NationalSwitchgear com...

Page 10: ...I L 41 103H Fig 7 Typical Time Curve of the Type CO 8 Relay 10 Courtesy of NationalSwitchgear com...

Page 11: ...I L 41 103H Fig 8 Typical Time Curve of the Type CO 9 Relay 11 Courtesy of NationalSwitchgear com...

Page 12: ...l L 41 103H TYPICAL TIME CURVES TYPE CO 11 OVERCURRENT RELAY 50 60 HERTZ n 4 DIAL SETTING Curve 288B655 Typical Time Curve of the Type CO 11 Relay Fig 9 12 Courtesy of NationalSwitchgear com...

Page 13: ...f the case and then re inserted into the case To provide selective circuit breaker operation a minimum coordinating time of 0 3 seconds plus circuit breaker time is recommended between the relay being...

Page 14: ...ed or inserted by locking two nuts on the stud and then turning the proper nut with a wrench For type CO 1 1 relay only the 1 30 times tap value operating time from the number 6 time dial Q position i...

Page 15: ...rent ROUTINE MAINTENANCE The adjustment of the spring tension in setting the minimum trip current value of the relay is most conveniently made with the damping mag net removed All relays should be ins...

Page 16: ...ime at 1 3 times tap value is not within these limits a minor adjustment of the control spring will give the correct operating time without any undue effect on the minimum pick up of the relay This ch...

Page 17: ...rent Multiples of Tap Value Time Dial Position Current Multiples of Tap Value Relay Type 0 22 20 6 3 0 57 CO 2 14 30 10 CO 5 6 2 37 80 1 19 20 CO 6 6 9 2 46 1 1 1 4 27 20 CO 7 6 i 1 1 1 CO 8 6 13 35 2...

Page 18: ...OLES _ 5 375 136 53 4 f OI6 397 250 n 6 35 t 1 031 4 1 031 1 031 f 1 031 H 26 19 26 19 26 19 26 19 1 190 32 SCREW 375 1 344 SPACERS FOR 34 14 THIN PANELS 9 53 R PANEL CASE 5 16 18 SCREW Q7 FOR THICK P...

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