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Protection Relays & Systems
(306 results)Protection relays detect abnormal operating conditions in an industrial system and may trigger an alert or isolate the offending device from the system. Common detection functions include; Arc-flash, temperature monitoring, ground fault, over-current, over-voltage, reverse power flow, over-frequency, under-frequency and phase loss, sequence or imbalance.
| Part # | Manufacturer | Description | Availability | Pricing | Quantity |
|---|---|---|---|---|---|
 PGR-4700-120Protection Relays & Systems | Littelfuse | Electromechanical Relay 120VAC DPST-NO/DPST-NC(55x115x75)mm DIN Rail Protective Relay | 19 | - | |
 SE-330-23-00Protection Relays & Systems | Littelfuse | GRND RES RELAY ETHERNET-DC SUP | In Stock | - | |
 PGR-4300-24Protection Relays & Systems | Littelfuse | Electromechanical Relay 24VDC 10ADC/8AAC SPDT(55x115x75)mm DIN Rail Generator Ground Fault Relay | 13 | - | |
 MPU-32-01-01Protection Relays & Systems | Littelfuse | MPR WITH TIA-232/TIA-485 | In Stock | - | |
 SE-330-06-00Protection Relays & Systems | Littelfuse | NGR MON UNIV E-NET DUAL RJ45 618 | In Stock | - | |
 FPS-CTU-02-00Protection Relays & Systems | Littelfuse | FEEDER PROTECT CONTROL UNIT | In Stock | - | |
 777-TSProtection Relays & Systems | Littelfuse | 3-PHASE OVERLOAD RELAY/190-480 | In Stock | - | |
 SE-134C-XGC-00Protection Relays & Systems | Littelfuse | GF-GC MON AC/DC SUPPLY EXT-GC | In Stock | - | |
 SE-325ESNProtection Relays & Systems | Littelfuse | NGR MON 240 VAC EXT RF NON-LATCH | In Stock | - | |
SE-330-01-00Protection Relays & Systems | Littelfuse | Protection Relays and Controls | In Stock | - | |
MPU-32-00-00Protection Relays & Systems | Littelfuse | KIT MPR WITH TIA-232 AND CIM MPU | In Stock | - | |
 NGRM-ENC-201-20Protection Relays & Systems | Littelfuse | PMT SE-330 METER PULSING | In Stock | - | |
SE-325NProtection Relays & Systems | Littelfuse | NGR MONITOR 120 VAC NON-LATCHING | In Stock | - | |
 MPS-CTU-01-00Protection Relays & Systems | Littelfuse | MPS W/STANDARD COMM CONTROL UNIT | In Stock | - | |
 SE-330AU-26-00Protection Relays & Systems | Littelfuse | MONITOR NGR 48V DUAL RJ45 61850 | In Stock | - | |
 EL731-22-00Protection Relays & Systems | Littelfuse | Electromechanical Relay 24VDC 3PDT(129x96x48)mm Panel Earth Leakage Relay | In Stock | - | |
 AF0100-00Protection Relays & Systems | Littelfuse | ARC-FLASH RELAY, UNIVERSAL SUPPL | 2 | - | |
 77C-KW/HPProtection Relays & Systems | Littelfuse | 1-PHASE POWER MONITOR/ 100-240 | 2 | - | |
SE-325DNTProtection Relays & Systems | Littelfuse | NGR MON 120V NON-LATCH GF 0.1-5S | In Stock | - | |
 777-LR-P2Protection Relays & Systems | Littelfuse | 3-PHASE OVERLOAD RELAY/200-480 | 18 | - | |
SE-330HV-00-00Protection Relays & Systems | Littelfuse | NGR MONITOR HV | In Stock | - | |
EL731-04-10Protection Relays & Systems | Littelfuse | AC/DC EARTH-LKGE RELAY | In Stock | - | |
 FPU-32-00-00Protection Relays & Systems | Littelfuse | Feeder Protection Relays | In Stock | - | |
 SE-703-0D-02Protection Relays & Systems | Littelfuse | MONITOR EARTH LEAKAGE | In Stock | - | |
SE-703-0T-02Protection Relays & Systems | Littelfuse | MONITOR EARTH LEAKAGE | In Stock | - |
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