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Best Phase Monitoring Relays Deals Online in the US (10 deals found)

Last Updated - March 15, 2026 Sort By:

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YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220)
Modular Design: Features a standardized modular structure for rail-type installation.

$22.97 $27.18
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DPA51CM44 3 Phase Monitoring Relay Current Voltage Monitoring Relay Phase Sequence Protector 208-480VAC Phase Sequence Protector with Indicator for 3 Phase Motor
Small Size: This 3-Phase Monitoring Relay has a small compact size for easy and convenient use and install, and the size of the Monitoring Relay is 8.1 x 6.7 x 1.75 cm/3.1 x 2.6 x 0.6 inch, you can install it on any places around the room, saving a lot of place

$20.73 $21.86
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LITTELFUSE 102A 12-18 AWG Wire Size, 190-480 VAC, 3-Phase, -40 to 70 DEG. C, 5 WATTS, 50/60 HZ, SPDT-1 Form C, Voltage Monitor
102A 3-Phase Voltage Monitor

$197.84
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TIME Mark 258B 3-Phase Monitor 258B240VAC
Detects phase loss, low voltage, phase reversal

$78.99
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KNMIPJD Three-Phase Four-Wire Voltage Monitoring Relay AC/DC 110V 63A Adjustable Over and Under Voltage Protection Six LED Display Voltage Current Electric Energy Intelligent Relays Reset Prote (63A)
True RMS Voltage & Current Monitoring: Features a six LED display for real-time, accurate readings of voltage and current, ensuring precise monitoring of your electrical system

$34.39 $38.69
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Voltage Monitor, 3-phase, 190-480VAC or 475-600VAC, 50/60Hz
The 460's universal range from 190-480VAC, 50/60 Hz provides the versatility needed to handle global applications.

$133.52
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YWBL-WH RD6-W LCD Display Under Over Voltage Phase Sequence Protector 3 Phase Voltage Monitor Relay 208-480VAC
Voltage: Rated Voltage: 208 to 480VAC universal, 50/60Hz. Powered by the measuring circuit, no additional auxiliary power required.

$36.68
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KNMIPJD Three-Phase Four-Wire Voltage Monitoring Relay AC/DC 110V 100A Adjustable Over and Under Voltage Protection Six LED Display Voltage Current Electric Energy Intelligent Relays Reset Prote
True RMS Voltage & Current Monitoring: Features a six LED display for real-time, accurate readings of voltage and current, ensuring precise monitoring of your electrical system

$39.99
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TG30S 220-440V AC 3-Phase Sequence Relay Protector Voltage Phase Protective Relay
The function of the monitor is not affected by the current of the line or load, the inrush current, the unbalanced current and the nature of the load. Long-term work with full performance and full climate. Power consumption is no more than 2W.

$15.83
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Oumefar AC 480V 3 Phase Circuit Voltage Monitoring Relay 5 Indicators Heavy Duty Phase Failure Sequence Relay Stable for Air Compressors
3-Phase Protection & Monitoring: Detects phase loss, reverse sequence, overvoltage (up to +15%), and undervoltage (down to -15%) with 2S delay for motor and equipment safety.

$17.19
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10 Phase Monitoring Relays deals are available from: Amazon stores, starting from $15.83.
The biggest discount we found is 10%% on YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) at Amazon.
The lowest price we found is $15.83 while the highest is $197.84.
Prices for the best Phase Monitoring Relays deals average at $59.81.
Last updated on March 15, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Phase Monitoring Relays.