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Monitors & Relays
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Electrical Monitors measure various criteria of electrical current and take corrective action when needed. Browse voltage monitors, load sensors, remote monitors, relays and more below.

Littelfuse 601575 Three-Phase Voltage Monitor MSR601575 Littelfuse 601575, 500-600V, Three-Phase Voltage Monitor, voltage monitor, volt monitor, monitor, voltage, protection, motor protection, pump protection, motor saver, current protection, run dry protection, SymCom
Price: $454.94
Availability: Special Order
Littelfuse/Symcom Item #: MSR601575 -
Littelfuse 777-575-HRG-P2 Pump Monitor Overload Relay 500-600V 3-Phase 2-90FLA Internal 0-Seq CT Plus MSR777575HRGP2, 777-575-HRG-P2, motor protection, pump protection, motor saver, current protection, run dry protection, Littelfuse, Symcom
Price: $851.48
Availability: Special Order
Littelfuse/Symcom Item #: MSR777575HRGP2 -
Littelfuse 777-575-KW/HP-P2 Pump Monitor Overload Relay 500-600V 3-Phase 2-800FLA Plus MSR777575KWHPP2, Littelfuse 777-575-KW/HP-P2, motor protection, pump protection, motor saver, current protection, run dry protection, SymCom
Price: $851.48
Availability: Special Order
Littelfuse/Symcom Item #: MSR777575KWHPP2 -
Littelfuse 777-575-LR-P2 Pump Monitor Overload Relay 500-600V 3-Phase 1-800FLA Plus MSR777575LRP2, SymCom 777-575-LR-P2, motor protection, pump protection, motor saver, current protection, run dry protection, Littelfuse
Price: $821.17
Availability: Special Order
Littelfuse/Symcom Item #: MSR777575LRP2 -
Littelfuse 777-575-P2 Pump Monitor Overload Relay 500-600V 3-Phase 2-800FLA Plus MSR777575P2, Littelfuse 777-575-P2, motor protection, pump protection, motor saver, current protection, run dry protection, Symcom
Price: $821.17
Availability: Special Order
Littelfuse/Symcom Item #: MSR777575P2 -
Littelfuse 777-FT Pump Monitor Overload Relay 190-480V 3-Phase 2-800FLA Fast OC Trip MSR777FT, Littelfuse 777-FT, motor protection, pump protection, motor saver, current protection, run dry protection, SymCom
Price: $851.48
Availability: Special Order
Littelfuse/Symcom Item #: MSR777FT -
Littelfuse 777-HRG-P2 Pump Monitor Overload Relay 200-480V 3-Phase 2-90FLA Internal 0-Seq CT Plus MSR777HRGP2, Littelfuse 777-HRG-P2, motor protection, pump protection, motor saver, current protection, run dry protection, SymCom
Price: $898.10
Availability: Special Order
Littelfuse/Symcom Item #: MSR777HRGP2 -
Littelfuse 777-HVR-KW/HP-P2 Pump Monitor Overload Relay 340-480V 3-Phase 2-800FLA Plus motor protection, pump protection, motor saver, current protection, run dry protection, SymCom,littelfuse
Price: $898.10
Availability: Special Order
Littelfuse/Symcom Item #: MSR777HVRKWHPP2 -
Littelfuse 777-HVR-LR-P2 Pump Monitor Overload Relay 340-480V 3-Phase 1-800FLA Plus motor protection, pump protection, motor saver, current protection, run dry protection, SymCom,Littelfuse
Price: $851.48
Availability: Special Order
Littelfuse/Symcom Item #: MSR777HVRLRP2 -
Littelfuse 777-HVR-P2 Pump Monitor Overload Relay 340-480V 3-Phase 2-800FLA Plus motor protection, pump protection, motor saver, current protection, run dry protection, SymCom,Littelfuse
Price: $851.48
Availability: Special Order
Littelfuse/Symcom Item #: MSR777HVRP2 -
Littelfuse 777-HVR-SP Pump Monitor Overload Relay 340-480V Single-Phase 2-800FLA MSR777HVRSP, Littelfuse 777-HVR-SP, motor protection, pump protection, motor saver, current protection, run dry protection, SymCom
Price: $851.48
Availability: Special Order
Littelfuse/Symcom Item #: MSR777HVRSP -
Littelfuse 777-KW/HP-P2 Pump Monitor Overload Relay 200-480V 3-Phase 2-800FLA Plus MSR777KWHPP2, Littelfuse 777-KW/HP-P2, Pump Monitor, Overload Relay, motor protection, pump protection, motor saver, current protection, run dry protection, SymCom
Price: $851.48
Availability: Out of Stock
Littelfuse/Symcom Item #: MSR777KWHPP2 -

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