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Best Phase Monitoring Relays - Buying Guide

Last Updated: 01/20/2020

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Bestselling Phase Monitoring Relays on Amazon

  1. Voltage Monitoring Relay DC 12V/24V/36V/48V Over-Voltage and Under-Voltage Protection Relay 35MM Gui...
  2. Siemens 3UG4512-1AR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  3. Supco APR5 Wire to Wire Adjustable Potential Relay, 30 A Load Current, 110 - 270 VAC Single Phase Op...
  4. Schneider RM22TU23 3 PHASE UNDERVOLTAGE CONTROL RELAY RM22-TU
  5. Siemens 3UG4513-1BR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  6. ATC SLA-440-ALE Monitor/Relay, 430-480 Adjustable, Lock Shaft Adjusted, Surface Mounted, 8 Screw Ter...
  7. Siemens 3UG4615-1CR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...
  8. SVR1000 Single Phase Protection Relay Over-Voltage 9V-18V Under-Voltage 0.1V-6V AC/DC(D12)
  9. Voltage Monitoring Relay DC 12V/24V/36V/48V Over-Voltage and Under-Voltage Protection Relay 35MM Gui...
  10. Siemens 3UG4512-1BR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Sc...

  #1

Voltage Monitoring Relay DC 12V/24V/36V/48V Over-Voltage and Under-Voltage Protection Relay 35MM Guide Rail 13-17V 10-14V(DC12V)

 Ean: 0748018730044   |    PartNumber: YWBL-WHamgsv40wqb-01   |   Asin: B07QDW3BDR

Features:
Standard modular structure, guide rail type installation Real-time monitoring of dc overvoltage and undervoltage faults No additional auxiliary power supply is required Both over - voltage and under - voltage value can be adjusted Action time can be adjusted 2 sets of normally open and normally closed contacts 2 indicator lights indicate various working conditions Typical applications: dc motor, battery,UPS power supply, dc switchgear, dc panel, industrial control system

Specification:
Protection function: over voltage, under voltage
Model: DVRD - 12/24/36/48(Optional)
Rated voltage: DC 12V/24V/36V/48V(Optional)
Monitoring circuit: direct current circuit
Protection function: over voltage, under voltage
Overvoltage regulation range: 13-17v
Undervoltage adjustment range: 10-14v
Action delay range: 0.1-15s
Display mode: normal, action 2 LED lights indicate the working status
Contact form: 2 set of normally open and normally closed contacts
Contact capacity: 6A 250VAC (resistivity)
Installation: 35mm guide rail
Overall dimension: 79 23 79mm / 3.1 0.9 3.1in
Weight: 200 g / 7.1 oz(approx.)

Package list:
1 Overvoltage Undervoltage Protector

Features

  • PRODUCT NAME---Voltage Monitoring Relay; Protection function: over voltage, under voltage; Rated voltage: DC 12V/24V/36V/48V; Overvoltage regulation range: 13-17v; Undervoltage adjustment range: 10-14v; Contact capacity: 6A 250VAC (resistivity)
  • REAL-TIME MONITORING---The voltage monitoring relay could achieve real-time monitoring of dc overvoltage and undervoltage faults, and over-voltage, under-voltage value, and action time can be adjusted
  • MAIN FEATURES---The voltage monitoring relay is of 2 sets of normally open and normally closed contacts, 2 indicator lights indicate various working conditions, no additional auxiliary power supply is required
  • 35MM GUIDE RAIL---With 35mm guide rail and standard modular structure, the voltage monitoring relay is easy to install, easy to operate
  • TYPICAL APPLICATIONS---The voltage monitoring relay is typically applied in dc motor, battery,UPS power supply, dc switchgear, dc panel, industrial control system
  • See more on Amazon...

Brand: YWBL-WH   |   Manufacturer: YWBL-WH

Package Dimensions: 1.1 x 3.3 x 3.4 inches (2.8 x 8.4 x 8.6 cm)

Amazon Price: $12.29 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 24 hours
List Price: $25.59

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  #2

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

This Supco APR5 wire-to-wire adjustable potential relay is used to start 1-phase, capacitor-type motors in air conditioning and refrigeration applications. It is a replacement part with adjustable settings for wire-to-wire replacement of most potential relays with 110 to 270 VAC pickup voltage. It has a safety time-out of 1 to 1.5 sec, at which point the contacts will open if the motor does not start. It has universal, non-positional mounting and adapters for screw or push-on terminals. This adjustable potential relay replaces 3- and 5-terminal potential relays and is suitable for use with single phase motors or air conditioning and refrigeration compressors up to 5 hp.

Specifications Operating voltage 110-270 VAC Load current 30 amp Time setting range 0.05 100 sec Operating temperature -40 to +150 degrees F Dimensions* 1.5 x 2.25 x 1.75" (H x W x D) *H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Relay switches (also called an electrical relay or an electrical relay switch) use a small amount of power to control a larger source of power connected to electrical devices such as car motors, computers, and lighting installations. A basic relay switch has a control circuit with an electromagnetic coil and a load circuit with contacts and a lever. When current flows into the relay switch, it moves through the coil and a magnetic field is created, which causes the lever in the load circuit to move between contacts, either turning the device on or off. In a normally open (NO) relay switch, when power is supplied to the relay, the load circuit is closed and the power source connected to the relay is turned on. In a normally closed (NC) relay switch, when power is supplied to the relay, the load circuit is open and the power source connected to the relay is turned off. In other types of relay switches, non-moving parts such as transistors or semiconductors can be used as the control circuit to operate the switching mechanism. Relay switches can be controlled with an external switch, such as a light switch, or they can be connected to an automatically switched power source, such as a car ignition. One relay can operate multiple switches, and multiple relays can be operated with a single switch, with each relay operating independently from the other relays in the system.

Supco manufactures test instruments and replacement parts for heating, ventilation, air conditioning, and refrigeration systems. The company, founded in 1945, is headquartered in Allenwood, NJ.

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
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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: $20.93 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 24 hours
List Price: $24.22

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  #3

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: 4.17 x 4.29 x 4.61 inches (10.6 x 10.9 x 11.7 cm)

Amazon Price: $199.99 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 24 hours
List Price: $199.99

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  #4

SVR1000 Single Phase Protection Relay Over-Voltage 9V-18V Under-Voltage 0.1V-6V AC/DC(D12)

 Ean: 0703633820921   |    PartNumber: shgbwqe94u-01   |   Asin: B07PX33R12

Over-voltage value and action time can be adjusted. 3 Reset modes: manual, automatic, automatic with power-on delay. Fault recording function. Output test function. 1 CO & 1NC contacts, over-voltage and under-voltage protection.

Specification:
Model: SVR1000/AD48
Optional Type: D12, AD48, AD220
Monitoring Circuit: DC+,DC-
Rated Voltage: DC 12V
Protection Function: Over-voltage, Under-voltage
Over-voltage Adjustment Range: AC/DC 9V-18V,OFF
Under-voltage Adjustment Range: AC/DC 0.1V-6V
Over-voltage / Under-voltage Action Range: 0.1-999s
Reset Mode: manual, automatic, automatic with power-on delay
Reset Time: 0.1-999s
Display: Chinese LCD
Contact Form: 1 CO & 1NC
Contact Capacity: 6A 250VAC
Size: Approx. 80*43*54mm/3.1*1.7*2.1in
Installation: 35mm Guide Rail

Typical Application Scope: electric motor, blower, water pump, air compressor, crane, travelling crane, lifter, elevator, machine tool, central air-conditioning, refrigeration equipment, laser equipment, industrial control system

Package List:
1 * Over-voltage Under-voltage Relay


Features

  • Standard modular structure, guide rail type installation.
  • Ac/dc voltage universal, automatic identification of ac/dc voltage, no need to switch.
  • Built-in LCD Chinese display voltage value, fault status, setting parameters.
  • Real-time monitoring of single phase over-voltage and under-voltage fault.
  • No additional auxiliary power supply is required.
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Brand: YWBL-WH   |   Manufacturer: YWBL-WH

Package Dimensions: 0.1 x 1 x 1 inches (0.3 x 2.5 x 2.5 cm)

Amazon Price: $15.79 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 24 hours
List Price: $25.49

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  #5

Voltage Monitoring Relay DC 12V/24V/36V/48V Over-Voltage and Under-Voltage Protection Relay 35MM Guide Rail 13-17V 10-14V(DC48V)

 Ean: 0748018730075   |    PartNumber: YWBL-WHamgsv40wqb-04   |   Asin: B07QJ8B21R

Features:
Standard modular structure, guide rail type installation Real-time monitoring of dc overvoltage and undervoltage faults No additional auxiliary power supply is required Both over - voltage and under - voltage value can be adjusted Action time can be adjusted 2 sets of normally open and normally closed contacts 2 indicator lights indicate various working conditions Typical applications: dc motor, battery,UPS power supply, dc switchgear, dc panel, industrial control system

Specification:
Protection function: over voltage, under voltage
Model: DVRD - 12/24/36/48(Optional)
Rated voltage: DC 12V/24V/36V/48V(Optional)
Monitoring circuit: direct current circuit
Protection function: over voltage, under voltage
Overvoltage regulation range: 13-17v
Undervoltage adjustment range: 10-14v
Action delay range: 0.1-15s
Display mode: normal, action 2 LED lights indicate the working status
Contact form: 2 set of normally open and normally closed contacts
Contact capacity: 6A 250VAC (resistivity)
Installation: 35mm guide rail
Overall dimension: 79 23 79mm / 3.1 0.9 3.1in
Weight: 200 g / 7.1 oz(approx.)

Package list:
1 Overvoltage Undervoltage Protector

Features

  • PRODUCT NAME---Voltage Monitoring Relay; Protection function: over voltage, under voltage; Rated voltage: DC 12V/24V/36V/48V; Overvoltage regulation range: 13-17v; Undervoltage adjustment range: 10-14v; Contact capacity: 6A 250VAC (resistivity)
  • REAL-TIME MONITORING---The voltage monitoring relay could achieve real-time monitoring of dc overvoltage and undervoltage faults, and over-voltage, under-voltage value, and action time can be adjusted
  • MAIN FEATURES---The voltage monitoring relay is of 2 sets of normally open and normally closed contacts, 2 indicator lights indicate various working conditions, no additional auxiliary power supply is required
  • 35MM GUIDE RAIL---With 35mm guide rail and standard modular structure, the voltage monitoring relay is easy to install, easy to operate
  • TYPICAL APPLICATIONS---The voltage monitoring relay is typically applied in dc motor, battery,UPS power supply, dc switchgear, dc panel, industrial control system
  • See more on Amazon...

Brand: YWBL-WH   |   Manufacturer: YWBL-WH

Package Dimensions: 0.1 x 0.1 x 0.1 inches (0.3 x 0.3 x 0.3 cm)

Amazon Price: $24.79 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $24.79

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  #6

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: $144.47 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 24 hours
List Price: $150.47

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  #7

NTE Electronics R68-5A10-480 Series R68 Phase Monitoring AC Relay, SPDT, 10 Amp, 208-480 VAC

Model: R68-5A10-480   |    Mpn: R68-5A10-480   |    Ean: 0768249065272   |    PartNumber: R68-5A10-480   |   Asin: B008UDLHYM

Phase Monitoring Relays will protect against premature equipment failure caused by voltage faults on three-phase systems. These devices protect against unbalanced voltages or single phasing regardless of any regenerative voltages. The relay is energized when the phase sequence and all voltages are correct. Any one of four fault conditions will de-energize the relay. Re-energization is automatic upon correction of the fault. An LED indicates normal and tripped conditions.

Features

  • Universal Voltage - Works on Any 208-480V System
  • User-Selectable Phase Unbalance and Undervoltage Settings
  • User-Adjustable Time Delay Drop-Out on Undervoltage
  • LED Indicates both Normal and Fault Conditions
  • Compatible with most Wye or Delta Systems
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Brand: NTE Electronics   |   Manufacturer: NTE Electronics, Inc.

Package Dimensions: 2.28 x 4.49 x 7.48 inches (5.8 x 11.4 x 19.0 cm)

First Available: 2017-03-12

Amazon Price: $104.99 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 4-5 business days
List Price: $104.99

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  #8

TIANRUN Toddler Baby Boy Girl Long Sleeve Letter Cartoon Shirt Tops Striped Patchwork Tee Shirt for 1-7 Years Old Yellow

 Ean: 0035082670285   |   Asin: B0841V84LB

Size: 90 Recommended Age: 1-2 Years Bust: 62cm/24.4'' Sleeve: 39cm/15.3'' Length: 36cm/14.1''

Size: 100 Recommended Age: 2-3 Years Bust: 65cm/25.6'' Sleeve: 42cm/16.5'' Length: 39cm/15.3''

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Size: 130 Recommended Age: 5-6Years Bust: 78cm/30.7'' Sleeve: 51cm/20.0'' Length: 47cm/18.5''

Size: 140 Recommended Age: 6-7 Years Bust: 82cm/32.2'' Sleeve: 55cm/21.6'' Length: 50cm/19.6''



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Features

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Brand: TIANRUN   |   Manufacturer: TIANRUN

Amazon Price: $6.04 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $16.04

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  #9

Mootea Delay Timer Relay,APR-4 Phase Loss Reverse Protection Relay Phase Sequence Controller 10A 220/380VAC(380VAC)

 Ean: 0738603275159   |    PartNumber: Mooteacxegw4vtbp-02   |   Asin: B083ZD7RW2

Features:

1. Protection functions: phase failure, phase reverse, phase sequence protection.

2. Can be used to provide relay protection for various three-phase equipment such as motors, compressor, pump, fan, blower and so on.

3. High quality flame-retardant PV housing, waterproof and dustproof.

4. 8 pins with good contact performance, ensure stable working

5. Small volume, DIN rail mounting.




Specification:

Model: APR-4

Working voltage: 220VAC, 380VAC (Optional)

Rated current: 5A

Contact load: 5A 250VAC

Contact type: 1NO + 1NC

Delay accuracy: 0.5%

Mounting method: DIN rail

Operating temperature: ~40

Dimensions: 50*40*57mm / 1.97*1.57*2.24in

Package weight: Approx. 156g/5.5oz



Package list:

1 * Phase Sequence Relay

Features

  • Protection functions: phase failure, phase reverse, phase sequence protection.
  • Can be used to provide relay protection for various three-phase equipment such as motors, compressor, pump, fan, blower and so on.
  • High quality flame-retardant PV housing, waterproof and dustproof.
  • 8 pins with good contact performance, ensure stable working
  • Small volume, DIN rail mounting.
  • See more on Amazon...

Brand: Mootea   |   Manufacturer: Mootea

Item Dimensions: 1.97 x 2.17 x 3.35 inches (5.0 x 5.5 x 8.5 cm)   |   

Amazon Price: $8.79 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $8.79

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  #10

Mootea Delay Timer Relay,APR-4 Phase Loss Reverse Protection Relay Phase Sequence Controller 10A 220/380VAC(220VAC)

 Ean: 0738603275142   |    PartNumber: Mooteacxegw4vtbp-01   |   Asin: B083ZCVF3V

Features:

1. Protection functions: phase failure, phase reverse, phase sequence protection.

2. Can be used to provide relay protection for various three-phase equipment such as motors, compressor, pump, fan, blower and so on.

3. High quality flame-retardant PV housing, waterproof and dustproof.

4. 8 pins with good contact performance, ensure stable working

5. Small volume, DIN rail mounting.




Specification:

Model: APR-4

Working voltage: 220VAC, 380VAC (Optional)

Rated current: 5A

Contact load: 5A 250VAC

Contact type: 1NO + 1NC

Delay accuracy: 0.5%

Mounting method: DIN rail

Operating temperature: ~40

Dimensions: 50*40*57mm / 1.97*1.57*2.24in

Package weight: Approx. 156g/5.5oz



Package list:

1 * Phase Sequence Relay

Features

  • Protection functions: phase failure, phase reverse, phase sequence protection.
  • Can be used to provide relay protection for various three-phase equipment such as motors, compressor, pump, fan, blower and so on.
  • High quality flame-retardant PV housing, waterproof and dustproof.
  • 8 pins with good contact performance, ensure stable working
  • Small volume, DIN rail mounting.
  • See more on Amazon...

Brand: Mootea   |   Manufacturer: Mootea

Item Dimensions: 1.97 x 2.17 x 3.35 inches (5.0 x 5.5 x 8.5 cm)   |   

Amazon Price: $8.79 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $8.79

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  #11

Men Women Hooded Cloak Vintage Monk Robe Priest Robe Halloween Cosplay Costume Sets Punk Outwear (S, Coffee)

 Ean: 3184217764195   |   Asin: B083XM1ZCX

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Description:

Gender:Men/Women

Style:Daily/Casual/Cosplay

Material:Polyester

Pattern Type:Solid

Sleeve length: Long Sleeve

Clothes Length:Long

What you get:1 X Outwear + 1 X Hat + 1 X Cross + 1 X Rope

Features

  • Material - 65% Cotton, 35% Polyester. Lightweight,ultra soft could keep you warm all day but stay cool
  • Features - Long Sleeve/Lace up/with Hood. Including Outwear, Hat,Cross Necklace,Rope
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Brand: Dasuy

Amazon Price: $19.99 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $19.99

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  #12

Zerone 10A 220/380VAC APR-4 Phase Loss Reverse Protection Relay Phase Sequence Controller (380VAC)

 Ean: 0738603021091   |    PartNumber: Zeronebwkr26c1p3-02   |   Asin: B083WKSGTD

Specification:
Model: APR-4
Working voltage: 220VAC, 380VAC (Optional)
Rated current: 5A
Contact load: 5A 250VAC
Contact type: 1NO + 1NC
Delay accuracy: 0.5%
Mounting method: DIN rail
Operating temperature: ~40
Dimensions: 50*40*57mm / 1.97*1.57*2.24in
Package weight: Approx. 156g/5.5oz

Package list:
1 * Phase Sequence Relay

Features

  • Protection functions: phase failure, phase reverse, phase sequence protection.
  • Can be used to provide relay protection for various three-phase equipment such as motors, compressor, pump, fan, blower and so on.
  • High quality flame-retardant PV housing, waterproof and dustproof.
  • 8 pins with good contact performance, ensure stable working
  • Small volume, DIN rail mounting.
  • See more on Amazon...

Brand: Zer one1   |   Manufacturer: Zer one1

Item Dimensions: 1.97 x 2.17 x 3.35 inches (5.0 x 5.5 x 8.5 cm)   |   

Amazon Price: $9.59 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $9.59

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  #13

Voltage Monitoring Control Relay, GRV8-05 3-Phase Voltage Monitoring Relay Phase Sequence Phase Failure Protection M265

 Ean: 0738602905606   |    PartNumber: Jadpesfdzw1956oq   |   Asin: B083W5SWDT




Specification:

Function: Monitor L-N voltage (3-phase 4-wire system)

Monitoring terminal: L1-L2-L3-N

Power: L1-N

Rated working voltage: 127-132-138-220-230-240-254-265 (P-N)

Measuring range: 101V-318V

Voltage threshold range: 2%-20% (rated voltage)

Voltage fixed lag rate: 2%

Voltage measurement error: 1%

Power-on delay time: 0.5s




Knob setting accuracy: 10%

Reset time: 1s

Temperature fluctuation error: 0.05%/ C, at=20 C

Output: 1 x SPDT; 10A/ AC1; 250VAC/24VDC

Minimum switching power: 500mW

Overvoltage: 2%-20%

Undervoltage: -20%-2%

Unbalanced voltage: 8%

Action delay time: 0.1-10s adjustable

Phase sequence protection: Yes

Phase failure protection: Yes

Power indicator: Green LED

Output relay indication: Red LED

Mechanical life: 1x107

Mounting method: 35mm DIN rail mounting

Mount altitude: 2000m

Weight: Approx. 76g/2.7oz



Package list:

1 * Voltage Monitoring Relay

Features

  • 8 kinds of adjustable rated voltage.
  • This relay can monitor own working voltage (true RMS measurement).
  • Voltage measurement accuracy is not more than 1%.
  • Relay working status is indicated by LED indicators.
  • With super small volume, this relay can be mounted on 35mm DIN rail.
  • See more on Amazon...

Brand: Jadpes   |   Manufacturer: Jadpes

Item Dimensions: 2.76 x 1.18 x 3.94 inches (7.0 x 3.0 x 10.0 cm)   |   

Amazon Price: $30.29 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $30.29

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  #14

Zerone Voltage Monitoring Relay,GRV8-04 3-Phase Voltage Monitoring Relay Phase Sequence Phase Failure Protection M460

 Ean: 0738602855451   |    PartNumber: Zeroneqv1i6p9hg3   |   Asin: B083V3WQSN

Specification:
Function: Monitor L-L voltage (3-phase 3-wire system)
Monitoring terminal: L1-L2-L3
Power: L1-L2
Rated working voltage: 220-230-240-380-400-415-440-460(P-P)
Rated power frequency: 45Hz-65Hz
Measuring range: 176V-552V
Voltage threshold range: 2%-20% (rated voltage)
Voltage fixed lag rate: 2%
Voltage measurement error: 1%
Power-on delay time: 0.5s
Knob setting accuracy: 10%
Reset time: 1s
Temperature fluctuation error: 0.05%/ C, at=20 C
Output: 1 x SPDT; 10A/ AC1; 250VAC/24VDC
Minimum switching power: 500mW
Overvoltage: 2%-20%
Undervoltage: -20%-2%
Action delay time: 0.1-10s adjustable
Phase sequence protection: Yes
Phase failure protection: Yes
Power indicator: Green LED
Output relay indication: Red LED
Mechanical life: 1x107
Mounting method: 35mm DIN rail mounting
Mount altitude: 2000m
Weight: Approx. 78g/2.7oz

Package list:
1 * Voltage Monitoring Relay

Features

  • This relay can monitor own working voltage (true RMS measurement).
  • 8 kinds of adjustable rated voltage.
  • Voltage measurement accuracy is not more than 1%.
  • Relay working status is indicated by LED indicators.With super small volume, this relay can be mounted on 35mm DIN rail.
  • Application: Equipment protection and control(tower crane, elevator, agriculture equipment, refrigerated trucks); Protect equipment from reverse running; Normal/emergency power supply switch; Protect against phase failure of a dynamic load.
  • See more on Amazon...

Brand: Zer one1   |   Manufacturer: Zer one1

Item Dimensions: 2.76 x 1.18 x 3.94 inches (7.0 x 3.0 x 10.0 cm)   |   

Amazon Price: $13.49 | as of 01/20/2020(5:11pm pst)
Availibility: Usually ships in 1-2 business days
List Price: $13.49

See Amazon Reviews | Add to your Amazon Wishlist

See On Amazon




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