GE P643 User Manual

4.5 Negative Sequence Overcurrent Protection 462
4.5.1 NPSOC Directional Parameters 462
4.6 Circuit Breaker Fail Protection 463
5 Performance of Voltage Protection Functions 464
5.1 Undervoltage Protection (P643/5) 464
5.2 Overvoltage Protection 464
5.3 Residual Overvoltage Protection (P643/5) 464
5.4 Negative Sequence Voltage Protection 464
6 Performance of Frequency Protection Functions 465
6.1 Overfrequency Protection 465
6.2 Underfrequency Protection 465
6.3 Overfluxing Protection 465
7 Performance of Monitoring and Control Functions 466
7.1 Voltage Transformer Supervision 466
7.2 Current Transformer Supervision 466
7.3 Pole Dead Protection 466
7.4 PSL Timers 467
8 Measurements and Recording 468
8.1 General 468
8.2 Disturbance Records 468
8.3 Event, Fault and Maintenance Records 468
8.4 Current Loop Inputs/Outputs 468
9 Standards Compliance 470
9.1 EMC Compliance: 2004/108/EC 470
9.2 Product Safety: 2006/95/EC 470
9.3 R&TTE Compliance 470
9.4 UL/CUL Compliance 470
9.5 ATEX Compliance 470
9.6 IDMT standards 471
10 Mechanical Specifications 472
10.1 Physical Parameters 472
10.2 Enclosure Protection 472
10.3 Mechanical Robustness 472
10.4 Transit Packaging Performance 472
11 Ratings 473
11.1 AC Measuring Inputs 473
11.2 Current Transformer Inputs 473
11.3 Voltage Transformer Inputs 473
12 Power Supply 474
12.1 Auxiliary Supply Voltage 474
12.2 Nominal Burden 474
12.3 Power Supply Interruption 474
12.4 Battery Backup 475
13 Input / Output Connections 476
13.1 Isolated Digital Inputs 476
13.1.1 Nominal Pickup and Reset Thresholds 476
13.2 Standard Output Contacts 476
13.3 High Break Output Contacts 477
13.4 Watchdog Contacts 477
14 Environmental Conditions 478
14.1 Ambient Temperature Range 478
14.2 Temperature Endurance Test 478
14.3 Ambient Humidity Range 478
14.4 Corrosive Environments 478
15 Type Tests 479
15.1 Insulation 479
Contents P64x
xiv P64x-TM-EN-1.3

GE P643 Specifications

General

Brand	GE
Model	P643
Category	Relays
Language	English