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Best Phase Monitoring Relays - Buying Guide

Last Updated: 11/13/2018

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Bestselling Phase Monitoring Relays on Amazon

  1. Siemens 3UG4615-1CR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  2. ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Ter...
  3. MACROMATIC CONTROLS PMPU PHASE MONITORING RELAY, SPDT, 480VAC
  4. Siemens 3UG4622-1AW30 Monitoring Relay, Single Phase Current Monitoring, 22.5mm Width, Screw Termina...
  5. Siemens 3UG4512-1AR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  6. Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Op...
  7. Siemens 3UG4617-2CR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Ca...
  8. Siemens 3UG4511-1BP20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  9. Siemens 3UG4513-1BR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  10. Schneider RM22TR33 3 PHASE VOLTAGE CONTROL RELAY RM22-TR

  #1

ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Terminals

Model: SLA-440-ALE   |    Mpn: SLA-440-ALE   |    PartNumber: SLA-440-ALE   |   Asin: B00DWI316W

The ATC Diversified SLA Series is designed to protect 3-phase equipment against Phase Loss, Under Voltage, and Phase Reversal conditions. With normal operating voltages applied in the proper ABC sequence, the internal relay will energize (Pick-Up). When incorrect phase sequence or phase loss occurs or the three-phase voltages fall below the drop out voltages, the relay will de-energize (Drop-Out). On models featuring indicators, the LED glows when all line conditions are normal. Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are NOT required. For UL Listed units, with field wiring terminals, copper wire with 60 /75 C rating must be used for control circuitry connections. NOTE: When a phase is lost while the motor is running, a condition known as regeneration occurs where a voltage is induced into the open phase nearly equal in magnitude to the normal phase-to-phase voltage. However, with the exception of lightly loaded motors, enough change is detected by the SLA to provide the required protection when properly adjusted. The SLA Series is UL Listed under File Number E55826.

Features

  • Delta or Wye Systems
  • Fixed, Lock Shaft, or Screwdriver Adjustment
  • Available up to 480 VAC (625 VAC with E Style)
  • Several Enclosure Styles
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Brand: Atc   |   Manufacturer: ATC

Package Dimensions: 4 x 6 x 6 inches (10.2 x 15.2 x 15.2 cm)

Amazon Price: $185.55 | as of 11/13/2018(11:10pm pst)
Availibility: Usually ships in 24 hours
List Price: $201.00 | Used Price: $199.99

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  #2

MACROMATIC CONTROLS PMPU PHASE MONITORING RELAY, SPDT, 480VAC

Model: PMPU   |    Mpn: PMPU   |    Ean: 0013227675531   |    PartNumber: PMPU   |   Asin: B00KMRRGE4

Price for: Each 1 . Contact Configuration:SPDT.Operating Time Range:1s to 300s.Phase Type:3 Phase.Power Consumption:3VA.Relay Mounting:Quick Connect.SVHC:To Be Advised.Supply Voltage Max:480VAC.Switching Voltage Max:240VAC

Features

Brand: MACROMATIC CONTROLS   |   Manufacturer: MACROMATIC CONTROLS

Package Dimensions: 3 x 3 x 3 inches (7.6 x 7.6 x 7.6 cm)

Amazon Price: $113.06 | as of 11/13/2018(11:10pm pst)
Availibility: Usually ships in 2-3 business days
List Price: $120.10

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  #3

Siemens 3UG4622-1AW30 Monitoring Relay, Single Phase Current Monitoring, 22.5mm Width, Screw Terminal, 1 CO Contacts, 0.05A AC/DC Measuring Range, 0.01A-5A Hysteresis, 0-20 s Starting Bypass Time, 0-20 s Off Delay, 24-240VAC/DC Auxiliary Voltage

Model: 3UG46221AW30   |    Mpn: 3UG46221AW30   |    Ean: 4011209642423   |    PartNumber: 3UG46221AW30   |   Asin: B0091WERKW

Only two versions from 2 mA to 10 A. Can be variably set to over range, under range or window monitoring. Freely parameterizable delay times and reset switch. Actual value and fault type are permanently displayed. All of the versions have removable terminals. All of the versions have screw terminals or, alternatively, innovative Cage Clamp terminals

Features

  • 22.5 mm wide
  • Can be digitally set and with LCD display
  • Fault memory that can be switched-in
  • Simultaneous monitoring for current over range/under range over the complete measuring range
  • Wide-voltage versions reduce stock inventory costs
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Brand: Siemens   |   Manufacturer: Siemens

Item Dimensions: 0.24 x 0.31 x 0.31 inches (0.6 x 0.8 x 0.8 cm)   |   Package Dimensions: 1.2 x 3.9 x 4.3 inches (3.0 x 9.9 x 10.9 cm)

Amazon Price: $70.53 | as of 11/13/2018(11:10pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $83.82 | Used Price: $78.38

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  #4

Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Operating Voltage

 Ean: 0687152010080   |    PartNumber: APR5   |   Asin: B004XS1ML6

' Adjustable Potential Relay, Pick Up Voltage Rating 130-270 Volts, Power Rating Up to 5 HP '

Features

  • Adjustable potential relay for HVAC/R
  • Set pick up voltage
  • Safety time-out of 1 to 1.5 sec
  • Universal, non-positional mounting and adapters for screw or push-on terminals
  • Replaces 3- and 5-terminal potential relays
  • See more on Amazon...

Brand: Supco   |   Manufacturer: Supco

Package Dimensions: 2.5 x 2.5 x 6.1 inches (6.4 x 6.4 x 15.5 cm)

Amazon Price: $22.07 | as of 11/13/2018(11:10pm pst)
Availibility: Usually ships in 24 hours
List Price: $24.22

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  #5

1pc 5-Port 2-Way Hand Control Air Pneumatic Mechanical Valve, Manual Round Button(Green)

 Ean: 0792172722759   |    PartNumber: GOTOTOPiv46kxh5ym   |   Asin: B07FTGTXFV

Product features
USE: 3-Way, 2-Position hand operated manual controlled valve used for controlling pilots or diaphragms of larger valves, small cylinders, or any pressure system that is alternatively pressurized and exhausted.
MATERIALS: Constructed of industrial grade aluminum alloy components with NBR (nitrile rubber) seal.
ACTUATION: A red latching emergency mushroom style push button actuates the opening/closing of the valve.
GUARANTEE: We offer a 12 month money back guarantee. Feel free to contact our friendly staff.
SHIPS FROM CLEVELAND, OHIO, USA - EXPEDITED SHIPPING AVAILABLE




Product features
Product Name : Mechanical Valve;Model : MV522PB;Actuator Type : Momentary Green Mushroom Button
Working Medium : Air;Position and Way No. : 2 Position 5 Way;Pipe Thread Diameter : Air Inlet=Air Outlet=12mm,Exhaust=9mm
Pipe Size : 1/4 PT;Fixing Hole Diameter : 4mm/0.2inch;Working Pressure Range : 1.5 - 8kgf/cm2
Total Size(Approx.) : 12.7 x 3.5 x 2.5 cm / 5" x 1.4" x 0.98"(L*W*H);Material : Metal, Plastic
Weight : 200g;Package : 1 x Mechanical Valve
Product description
Description: 2/5 way mechanical valve. Steady performance,easy installation. This pneumatic mechanical valve is used for controlling pil

Features

  • 3-Way, 2-Position hand operated manual controlled valve
  • controlling pilots or diaphragms of larger valves, small cylinders, or any pressure system that is alternatively pressurized and exhausted.
  • Constructed of industrial grade aluminum alloy components with NBR (nitrile rubber) seal.
  • Steady performance,easy installation.
  • Pipe Thread Diameter : Air Inlet=Air Outlet=12mm,Exhaust=9mm
  • See more on Amazon...

Brand: GOTOTOP   |   Manufacturer: GOTOTOP

Item Dimensions: 1.57 x 2.36 x 2.76 inches (4.0 x 6.0 x 7.0 cm)   |   

Amazon Price: $22.27 | as of 11/13/2018(11:10pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $22.49

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  #6

Schneider RM35UB330 3 Phase Voltage Monitoring Relay 220-480V-AC D624509

 PartNumber: D624509-RM35UB330   |   Asin: B07FNQLX1P

NEW SCHNEIDER RM35UB330 3 PHASE VOLTAGE MONITORING RELAY 220-480V-AC D624509

Features

Brand: Schneider   |   Manufacturer: SCHNEIDER

Item Dimensions: 1.75 x 3.25 x 3.75 inches (4.4 x 8.3 x 9.5 cm)   |   Package Dimensions: 1.75 x 3.25 x 3.75 inches (4.4 x 8.3 x 9.5 cm)

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Looking For Something Else? Search

Most Popular
New Releases

  1. ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Ter...
  2. MACROMATIC CONTROLS PMPU PHASE MONITORING RELAY, SPDT, 480VAC
  3. Siemens 3UG4622-1AW30 Monitoring Relay, Single Phase Current Monitoring, 22.5mm Width, Screw Termina...
  4. Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Op...

Most Wished For

  1. ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Ter...
  2. MACROMATIC CONTROLS PMPU PHASE MONITORING RELAY, SPDT, 480VAC
  3. Siemens 3UG4622-1AW30 Monitoring Relay, Single Phase Current Monitoring, 22.5mm Width, Screw Termina...
  4. Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Op...

Most Gifted

  1. ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Ter...
  2. MACROMATIC CONTROLS PMPU PHASE MONITORING RELAY, SPDT, 480VAC
  3. Siemens 3UG4622-1AW30 Monitoring Relay, Single Phase Current Monitoring, 22.5mm Width, Screw Termina...
  4. Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Op...

Top Selling

  1. ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Ter...
  2. MACROMATIC CONTROLS PMPU PHASE MONITORING RELAY, SPDT, 480VAC
  3. Siemens 3UG4622-1AW30 Monitoring Relay, Single Phase Current Monitoring, 22.5mm Width, Screw Termina...
  4. Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Op...



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