Arc-Flash Detection

PGR-8800
Arc-Flash Relay
Limit arc-flash damage by detecting the light from an arc flash and tripping rapidly.

AF-0500
Arc-Flash Relay
Limit arc-flash damage by detecting the light from an arc flash and tripping rapidly.

AF0100 Series - Arc-Flash Relay

AF-0100
Arc-Flash Relay
The AF0100 Series arc-flash relay is a cost-effective solution that reduces arc-fault damage by detecting the light from an arc flash and rapidly tripping.

Motor and Feeder Protection

FPS
Feeder Protection System
Provides current, voltage, and temperature protection, data logging, and metering for three-phase transformers and feeder cables, including integrated breaker or contactor control.
FPU-32
Feeder Protection Unit
Provides current-based feeder protection, data logging, and metering.
MPS
Motor Protection System
Provides current, voltage, and temperature protection, data logging, and metering for three-phase motors. Starter control for 15 different starter types.
MPU-32
Motor Protection Unit
Provides current and temperature protection, data logging, and metering for three-phase motors.
MP8000 Series - Bluetooth Overload Relay
MP-8000
Bluetooth Overload Relay
Provides current, voltage and temperature protection for single and three phase motors. Programmable via Bluetooth using smartphone or tablet or with Ethernet TCP/IP communications port.
PGR-6100
Motor Ground-Fault & Insulation Relay
Combines the features of a ground-fault relay and insulation monitor into one unit, allowing it to provide online and offline protection for a motor.
PGR-6101
Ground-Fault & Insulation Monitor
Combines the features of a ground-fault relay and insulation monitor into one unit, allowing it to provide online and offline protection for a motor.

Trailing Cable Protection

SE-105
Ground-Fault Ground-Check Monitor
Combination ground-fault and ground-check monitor for resistance-grounded systems. Fail-safe and non-fail-safe operation.
SE-134C
Ground-Fault Ground-Check Monitor
Microprocessor-based combination ground-fault and ground-check monitor for resistance-grounded systems.
SE-107
Ground-Fault Ground-Check Monitor
Combination ground-fault and ground-check monitor for resistance-grounded systems. Fail-safe operation.
SE-135
Ground-Fault Ground-Check Monitor
Microprocessor-based combination ground-fault and ground-check monitor for resistance-grounded systems. Replacement for SE-125.

Neutral-Grounding-Resistor Monitors

SE-325
Neutral-Grounding-Resistor Monitor
Detects resistor failure and ground faults.
SE-330AU
Neutral-Earthing-Resistor Monitor
Detects resistor failure and earth faults. Microprocessor-based and communications capable.
SE-330
Neutral-Grounding-Resistor Monitor
Detects resistor failure and ground faults. Microprocessor-based, communications capable, and can control pulsing ground-fault systems.
SE-330HV
Neutral-Grounding-Resistor Monitor
Detects resistor failure and ground faults. Microprocessor-based and communications capable.

Ground-Fault Monitors

EL731
AC/DC Sensitive Earth-Leakage Relay
Sensitive earth-fault protection from 0 to 6,000 Hz on ac and dc systems using current sensors, ideal for variable-frequency drive applications.
EL-3100
Ground-Fault and Phase-Voltage Indicator
Self-powered ground-fault and phase voltage indication system for 3-phase systems.
SE-601
DC Ground-Fault Monitor
Provides ground-fault protection for ungrounded dc systems.
SE-703
Earth-Leakage Monitor
Provides earth-fault protection for resistance-earthed ac systems. Used in Australia.
PGR-3100
Ground-Fault Indication System
Provides faulted-phase indication for ungrounded and resistance-grounded systems; meets CEC 10-106(2) and NEC 250.21 requirements.
PGR-4300
Generator Ground-Fault Relay
Provides ground-fault protection for solidly grounded generators without the use of a current transformer.
SE-701
Ground-Fault Monitor
Provides ground-fault protection for grounded ac systems.
SE-704
Earth-Leakage Monitor
Provides sensitive ground-fault protection for resistance-grounded ac systems.

Other Standard Products

Accessories
Sensing Resistors, Current Transformers (CTs), Termination Devices, Remote Indication, and more.
Retrofits
Replace obsolete equipment with reliable technology from Littelfuse Startco.
SE-400
Ground-Fault-Relay Test Unit
Provides programmable current to test ground-fault relays. LED display.
SE-100T
Ground-Fault-Relay Tester
Provides current to test ground-fault relays.
SIO-RTD
RTD Module
Monitors RTD temperatures, 4-20mA analog signals, and provides TIA-485 output.