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Best Voltage Monitoring Relays - Buying Guide

Last Updated: 12/12/2019

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Bestselling Voltage Monitoring Relays on Amazon

  1. Icstation 3V 1 Channel Relay Power Switch Module with Optocoupler Opto Isolation High Level Trigger ...
  2. WHDTS WiFi Switch Relay Momentary Inching & Self-Locking Relay Delay Switch Module Smart Home Remote...
  3. Onyehn 1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Contro...
  4. SymCom MotorSaver 3-Phase Voltage Monitor Model 201A, 190-480V, 8-Pin Octal Base
  5. 3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Protection Relay Under Over Voltage Protector
  6. Functional Devices RIBU2C Enclosed Pilot Relay, 10 Amp 2 Spdt with 10-30 Vac/Dc/120 Vac Coil
  7. Time Mark Corporation A258B Relay; SSR; Phase Monitor; SPDT; Cur-Rtg 10A; Ctrl-V 480AC; Vol-Rtg 240A...
  8. Telemecanique LRD21 Relay; Overload; Class 10; 12 TO 18 A; Used with TeSys D Contactors
  9. CARLO GAVAZZI DPA51CM44 Mini 3-Phase Loss/Sequence Monitor, Slim 17.5 mm Width, 208-480 VAC Monitori...
  10. Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module 3v Logic Level Boards Rasp...

  #1

Icstation 3V 1 Channel Relay Power Switch Module with Optocoupler Opto Isolation High Level Trigger for IOT ESP8266 Development Board (Pack of 5)

Model: 3V 1 channel Relay Module   |    Mpn: 356705   |    PartNumber: 356705   |   Asin: B01M0E6SQM


Specifications:
Relay Module: SRD-DC03V-SL-C
Channel: 1 channel
Working Voltage: DC 3-3.3V
Compatible Load: 10A 250VAC / 10A 30VDC
Single Socket Length:7.5mm
Response Time:

Features

  • Optocoupler Isolator 3V/3.3V power relay module supports photocoupler isolation control.
  • High Level Trigger The relay module is triggered by high level signal, which can be input from microcontroller IO.
  • Jumper Caps You are free to select whether the relay and the signal share the same power supply or not by removing the jumper caps on the pins or not. It is recommended to share the same power supply, because that is more convenient for using.
  • 30VDC 250VAC Load The power switch is compatible with 10A 250VAC and 10A 30VDC load.
  • Long Life Fast response time less than 20ms and long life time up to 100,000 times snap action with diode freewheel protection. Please feel free to contact seller if you have any question. icstation@hotmail.com
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Brand: IS   |   Manufacturer: Icstation

Item Dimensions: 0.79 x 0.7 x 2.76 inches (2.0 x 1.8 x 7.0 cm)   |   Package Dimensions: 1.18 x 5 x 7.01 inches (3.0 x 12.7 x 17.8 cm)

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  #2

WHDTS WiFi Switch Relay Momentary Inching & Self-Locking Relay Delay Switch Module Smart Home Remote Control DC 12V Compatible with iOS Andriod 2G/3G/4G Network w/Manual

 Ean: 0615135207387   |    PartNumber: 43237-2   |   Asin: B071GCDGQB

Wanna Control Your Home Thousands of Miles Away? Wanna Control Your Appliances With Only One Cellphone? This WiFi Relay Switch Module Born for It. It is designed to provide you with a seamless control over your home equipment. It supports Both Self-locking Relay Mode And Inching Relay Mode. Self-locking Relay: It latches like a toggle switch. Press the button on "eWeLink" APP, relay switch module will keep on. Press the button again, relay switch module will be off. Inching Relay: It's Momentary like a pushbutton switch. Press the button on "eWeLink" APP, relay switch module will keep on for 0.5s and then off automatically. Note: The relay switch module can switch between these two modes (method as shown in User Manual). Features: 1.Remote Control Added Devices Through APP 2.Status Tracking. Home appliances' status will be fed back into your APP timely. 3.Supports Scheduled Timing Countdown Timer Loop Timing Grouping Function Smart Scene Share Control Numerous WIFI Switches W/ One Account. Using Steps: Power ON the Module Device, Download eWeLink APP (requires 2.4 GHz wifi signal for device), Connect the APP to Same WIFI that Connected Module, Add Devices (hold down pairing button for >6 seconds, release, flashing light = pairing mode), Setup Work Mode, Done. For Specific Instruction & Operation Steps, please download User Manual on the Product Page Named "Technical Specification" Section (Due To Character Limit). Parameters: Work Voltage&Current: DC12V; 250mA Load Voltage&Current: AC0-250V or DC0~30V; 10A/Channel(MAX) Output Type: Mechanical switch output(Cannot Output Voltage!) Control Mode: WIFI/2G/3G/4G; WIFI standard: 2.4GHz Work Modes: Self-locking Mode (Default) & Inching mode After-sale Service: Any issues, please feel free to Contact Us for help.

Features

  • MULTI-FUNCTION MODE : Smart remote control functions with Momentary Timing control, Cyclic Timing control, Delay Switch Control and Mechanical Switch Output meet your daily needs.
  • SUPER COMPATIBILITY : Work with IOS and Android 2/3/4G network. You can control the devices with your phone easily.
  • FLEXIBILITY OF OPERATION : This WIFI Inching /Self-locking Relay has a built-in antenna. Different wiring methods correspond to different equipment operation requirements.
  • ONE APP IN MOBILE PHONE : To make the switch work, just need to download the eWeLink APP from Google Play or Apple Store. And then set up the APP (refer to the User Manual for detailed steps) and connect the switch module to all your devices easily. And the APP eWeLink is also compatible for Amazon Alexa, Google Assistant and Google Nest. Please enjoy to control all your household appliances with your mobile phone wherever you are.
  • Comes With User Manual : In addition to providing quality products, fast logistics and perfect after-sale service, we can assist you in the installation. This wifi relay module's installing requires basic electronic knowledge. Read the Manual Carefully Before Use. Any Issues? Contact Us to Solve Your Problem. Communication Makes Problems Gone!
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Brand: WHDTS   |   Manufacturer: WHDTS

Package Dimensions: 0.71 x 4.8 x 6.5 inches (1.8 x 12.2 x 16.5 cm)

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  #3

Onyehn 1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board for Arduino (Pack of 5)

 Ean: 8431246151102   |   Asin: B07PNB86R7

- Size: 70mm X17mm X20mm (LxWxH)
- Main chip: EL817, SRD-DC03V-SL-C
- Work voltage: DC 3V/3.3V
- Control 10A 250VAC, 10A 30VDC load

Features
- Instructions with the signal output
- Signal input port can connect microcontroller IO port, high level signal
- Double power selection design anti-interference ability is strong, photoelectric isolation protection of high reliability
- Current wide detection range:DC0-25V input
- A diode current protection
- Response time is less than 20 milliseconds
- Relay long life can absorb 100000 times continuously
- External connection use spinning crimping terminal, make connection firmer
- With fixed installation hole, convenient installation

Package include
5 X 1 Channel 3V Relay Module

Features

  • 1 channel 3V/3.3V power relay mdoule support photocoupler isolation control;Support dual power supply input ensure high anti-iinterference ability
  • Fast response time less than 20ms and longlife time up to 100,000 times snap action
  • On-board signal output indicator, wire terminal and installing holescompatible with 10A 250VAC and 10A 30VDC load
  • Module Size: 70mmX17mmX20mm / 2.76X0.70X0.79 inch (L*W*H)
  • Relay Module: SRD-DC03V-SL-C;Channel: 1 channel;Working Voltage: DC 3-3.3V;Compatible Load: 10A 250VAC / 10A 30VDC;Single Socket Length: 7.5mm
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Brand: Onyehn   |   Manufacturer: Onyehn

Package Dimensions: 0.9 x 3.9 x 6.5 inches (2.3 x 9.9 x 16.5 cm)

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  #4

SymCom MotorSaver 3-Phase Voltage Monitor Model 201A, 190-480V, 8-Pin Octal Base

Model: 201A   |    Mpn: CRESCENT ENTERPRISES-62   |    Ean: 0696505439607   |    PartNumber: CRESCENT ENTERPRISES-62   |   Asin: B0176L8HBE

Littelfuse #201A - 3-PHASE PLUG-IN VOLTAGE MONITO

Features

Brand: Symcom   |   Manufacturer: Littelfuse

Item Dimensions: 1.75 x 2.37 x 4.13 inches (4.4 x 6.0 x 10.5 cm)   |   Package Dimensions: 3.4 x 3.5 x 5.8 inches (8.6 x 8.9 x 14.7 cm)

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  #5

3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Protection Relay Under Over Voltage Protector

 Ean: 0747333418897   |    PartNumber: YWBL-WH6ewt8gi2yq   |   Asin: B07Q5Z1CGM

Specification:
Model: JVR 800-2
Monitoring Circuit: L1, L2, L3
Rated voltage: 208-480V AC, 50/60Hz
Protection: over-voltage, under-voltage, voltage unbalance, phase loss, phase sequence, counter
Overvoltage setting range: 200-600V
Undervoltage setting range: 150-500V
Voltage hysteresis: 1-20V
Delay time for overvoltage and undervoltage: 0.1-30s
Voltage unbalance ratio: 1-50%
Voltage unbalance hysteresis: 1-10%
Voltage unbalance delay time: 0.1-30s
Delay time for phase loss: 0.1-30s
Delay time for phase sequence: 0.1-30s
Start delay time: 0-999s
Auto reset mode: ON/OFF
Auto reset time: 0.1-999s
Timer and counter input: AC/DC 80-450V
Indicators: LCD indicating voltage,current,operation status
Output contacts: 1 C/O,1NC
Contact capacity: 6A ,250VAC
Dimensions (H W D): 80 43 54mm/3.15 1.69 2.12inch
Mounting: suitable for 35mm rail
Weight: 129g

Package List:
1 3 Phase Voltage Monitoring Relay

Features

  • The Composition of This Product: Three-phase voltage protector, chronograph and counter are integrated in one relay.
  • Function: This voltage protection relay has overvoltage, undervoltage, phase loss, phase sequence and unbalanced three-phase voltage protection.
  • Practicality: This 3-phase voltage relay does not require an external power supply. Has practical functions: power delay, output test, etc
  • 2 rest modules are optional, manual and automatic.
  • The LCD can display data for easy reading.
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Brand: YWBL-WH   |   Manufacturer: YWBL-WH

Package Dimensions: 1.9 x 2.5 x 3.4 inches (4.8 x 6.4 x 8.6 cm)

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  #6

Functional Devices RIBU2C Enclosed Pilot Relay, 10 Amp 2 Spdt with 10-30 Vac/Dc/120 Vac Coil

Model: RIBU2C   |    Mpn: RIBU2C   |    Ean: 0616913184128   |    PartNumber: RIBU2C   |   Asin: B0078RYY00

10 amp 2 SPDT, 10-30 VAC/DC/120 VAC coil, sold as each, Functional Devices RIBU2C enclosed pilot relay, 10 amp 2 SPDT with 10-30 VAC/DC/120 VAC coil. Made in United States. Manufactured by Functional Devices, Inc.

Features

Brand: Functional Devices   |   Manufacturer: Functional Devices, Inc

Item Dimensions: 1.8 x 3.8 x 2.5 inches (4.6 x 9.7 x 6.4 cm)   |   Package Dimensions: 2.5 x 4.4 x 6.5 inches (6.4 x 11.2 x 16.5 cm)

First Available: 2017-06-13

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  #7

Telemecanique LRD21 Relay; Overload; Class 10; 12 TO 18 A; Used with TeSys D Contactors

Model: LRD 21   |    Mpn: LRD 21   |    PartNumber: LRD 21   |   Asin: B00DDEZ6ZO

Telemecanique Lrd 21 Bimetalic Overload Relay 12-18Amp 690V

Features

Brand: Telemecanique   |   Manufacturer: TELEMECANIQUE

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  #8

CARLO GAVAZZI DPA51CM44 Mini 3-Phase Loss/Sequence Monitor, Slim 17.5 mm Width, 208-480 VAC Monitoring, SPDT 5 amp Contact Output, Diagnostic LEDs, 2.8 oz. Size, 24 mm Height x 99 mm Width x 73 mm Diameter

Model: DPA51CM44   |    Mpn: DPA51CM44   |    Ean: 8030956000566   |    PartNumber: DPA51CM44   |   Asin: B00DDF2KDY

3-Phase Monitoring relay for the detection of incorrect phase sequence or total or partial phase loss. Supply range is 208 to 480VAC. The device also detects regenerated voltages up to 85% of the nominal voltage (phase to phase). Compact 17.5mm wide housing snaps onto DIN rail and features two diagnostic LEDs for relay and power supply on. 5 Amp SPDT relay output.

Features

  • 3-Phase Sequence/Loss Monitor
  • Monitors 208-480 VAC
  • 5 Amp SPDT Relay Output
  • Diagnostic LEDs
  • Only 17.5mm wide
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Brand: CARLO GAVAZZI   |   Manufacturer: CARLO GAVAZZI

Package Dimensions: 1 x 2.9 x 3.8 inches (2.5 x 7.4 x 9.7 cm)

First Available: 2017-03-12

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  #9

Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module 3v Logic Level Boards Raspberry Pi 3.3v Application

 Ean: 0782321857845   |    PartNumber: Relay-5   |   Asin: B07GBS62GX

Discription:
1. Voltage: DC 3v/3.3v
2. Size: 2.7"/70mm X 0.66"/17mm X 0.79"/20mm
3. Main components: EL817, Srd-dc03v-sl-c
4. Can control 10A 250VAC, 10A 30VDC load

Feature
1. The relay module has the output signal indicator light indication;
2. The signal input port can connect SCM IO port, high level signal drive;
3. Dual power supply design with anti-interference ability and high reliability of photoelectric isolation protection ;
4. With diode continuous flow protection;
5. Response time is less than 20 milliseconds;
6. Long life of relay can be absorbed 100,000 times continuously;
7. The external connection uses the Rotary crimping terminal, causes the wiring to be more solid;
8. With fixed installation hole, easy to install. Provide circuit diagram and detailed instructions for use.

Package include:
5 x 1 Channel Relay Module with Optocoupler

Features

  • 1. 3V 1-Channel Relay interface board support photocoupler isolation control,has the output signal indicator,the signal input port can connect SCM IO port, high level signal drive
  • 2. Support dual power supply input ensure high anti-interference ability,high reliability of photoelectric isolation protection
  • 3. With diode continuous flow protection,response time is less than 20 milliseconds,long life of relay can be absorbed 100,000 times continuously
  • 4. The external connection uses the rotary crimping terminal, causes the wiring to be more solid.
  • 5. Equiped with high-current relay, AC250V 10A ; DC30V 10A,each relay has normally open and normally closed contact. Can be selected by jumper relay and TTL or ground.
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Brand: Eagles   |   Manufacturer: Eagles

Package Dimensions: 1.3 x 3.7 x 5.4 inches (3.3 x 9.4 x 13.7 cm)

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  #10

LM YN Digital Voltage Comparator 0-100V Voltage Measurement Control Voltage Measuring / Charge Discharge Protection / Overvoltage / Undervoltage / Overload Protection 12V

 Ean: 0603983633151   |   Asin: B01M1JEH7T

User manual download link:
https://www.amazon.com/clouddrive/share/56TsVN32wK4n5fdWZ1fSwyy2P6uURyK6I99IfJVuY92

Operating voltage: DC 12V (nominal voltage should not exceed +/- 10%).
Current: less than 12V, 50mA (relay action not less than 12mA, turn off the display less than 3mA).
Operating temperature: Recommended -20 -60 (the limits of -30 -70 ).
Measuring range: 0-99.9V.
load capacity:
Normally open relay port maximum load capacity: DC 0-30V / 10A, AC 0-250V / 10A;
Relay NC port maximum load capacity: DC 0-28V / 10A, AC 0-125V / 10A.

Module interface:
Module voltage inputs: a 4-wire interface, all the terminals are the interface, user-friendly;
1, DC +: DC power positive;
2, DC-: DC power supply negative;
3, V +: measuring voltage positive electrode;
4, V-: measure negative voltage.

Function Module
The user can select from the following five kinds of functions in one, you can set and save function parameters are automatically saved parameter set, power-down is not lost.
Function1: Voltage measurement: this function is selected, the relay will not operate, digital display of the current measurement voltage.
Function 2: Charge monitoring: When the measured voltage falls below a preset voltage V1 and V2 in the lower one, relay, voltage V1 and V2 higher than the higher of a relay off.
Function3: Discharge Monitoring: When the measured voltage is higher than the preset voltage V1 and V2 higher one, relay, T1 and T2 voltage is lower than the lower one, the relay off.
Function 4: pull the interval: When measuring the voltage between V1 and V2 between, relay, the relay off other cases.
Function 5: interval outer pull: When the measured voltage falls below a preset voltage V1 and V2 in a lower or higher than the preset measuring a voltage higher voltages V1 and V2, the relay is energized; otherwise relay disconnect.

Features

  • DVB01 module is a versatile voltage monitoring controller, using industrial grade microcontroller as the main control unit, wide measurement range, high accuracy.
  • Module carefully processed genuine quality components made of stable performance, it can be widely used in a variety of voltage measurement and control types of occasions. The controller 5 different preset function.
  • Users can set the upper limit voltage and the lower voltage limit; measuring range of DC 0-100V, measuring accuracy +/- 0.1V.
  • Increase automatic power saving feature, users can customize the settings; all set parameters can be automatically saved, set the content of non-volatile.
  • User manual download link: https://www.amazon.com/clouddrive/share/56TsVN32wK4n5fdWZ1fSwyy2P6uURyK6I99IfJVuY92
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Brand: LM YN   |   Manufacturer: LM YN

Package Dimensions: 0.2 x 3.5 x 6 inches (0.5 x 8.9 x 15.2 cm)

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  #11

RD6-W LCD Display Under Over Voltage Phase Sequence Protector 3 Phase Voltage Monitor Relay 208-480VAC

 Ean: 0717444301999   |    PartNumber: YWBL-WHfhoutdw96r   |   Asin: B07W6W6LLQ

Features:
Standard modular construction, rail mounted.
LCD display shows voltage value, fault status, parameter setting.
Real-time monitoring of three-phase overvoltage, undervoltage, phase error, phase loss faulty.
Powered by the measuring circuit, no additional auxiliary power required.
Adjustable overvoltage value, undervoltage value and action time.
Timekeeping and counting function.

Specification:
Rated Voltage: 208-480VAC universal, 50/60Hz
Protection Function: Overvoltage, Undervoltage, Phase Failure, Phase Error, Voltage Imbalance, Timekeeping, Count, Fault Record
Setting Parameters:
Overvoltage: 200-600V
Undervoltage: 150-500V
Over and Under Pressure Return Difference: 1-20V
Over and Under Voltage Delay: 0.1-30s
Unbalance Rate: 1-50%
Unbalance Return Difference: 1-10%
Unbalance Delay: 0.1-30s
Reset Delay: 0.1-999s
Contact Form: A group of conversion, a group of normally closed
Contact Capacity: 6A AC250V (resistive)
Mount Method: 35mm DIN rail

Typical Application:
Motor, Fan, Pump, Air Compressor, Hoist, Vehicle, Crane, Elevator, Machine Tools, Central Air Conditioning, Refrigeration Equipment, Laser Equipment, Industrial Control System

Package List:
1 x Phase Sequence Protector




Features

  • Advantage: LCD display shows voltage value, fault status, parameter setting.Real-time monitoring of three-phase overvoltage, undervoltage, phase error, phase loss faulty.Adjustable overvoltage value, undervoltage value and action time.
  • Operation voltage:Rated Voltage: 208-480VAC universal, 50/60Hz. Powered by the measuring circuit, no additional auxiliary power required.
  • Protection Function: Overvoltage, Undervoltage, Phase Failure, Phase Error, Voltage Imbalance, Timekeeping, Count, Fault Record.
  • Easy Installation: Standard modular construction, rail mounted for convenient installation. Mount Method: 35mm DIN rail.
  • Typical Application:Motor, Fan, Pump, Air Compressor, Hoist, Vehicle, Crane, Elevator, Machine Tools, Central Air Conditioning, Refrigeration Equipment, Laser Equipment, Industrial Control System.
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Brand: YWBL-WH   |   Manufacturer: YWBL-WH

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  #12

GRV8-02 Single-phase Voltage Control Monitoring Relay Over And Under Voltage Voltage Protection Relay (GRV8-02/AD240)

 Ean: 0705990004273   |    PartNumber: KEYRENaf47h695w0-04   |   Asin: B07YZFG4ZL

Features:
1. Monitor the working voltage (true RMS measurement).
2. The operating mode can be selected via the rotaries knob.
3. High accuracy, voltage measurement accuracy is 1%.
4. The working status of the relay is indicated by the LED indicator, which is simple and convenient.
5. Compact size, only 18mm width, 35mm rail mounting.
6. Apply to Overvoltage protection for electrical equipment or compressors, emergency/backup power switching control.

Specification:
Function Voltage monitoringFunction
Power terminal (monitoring terminal)
A1(+)-A2(-)
Rated power supply voltage (Optional)
#1: AC220V
#2: DC12V
#3: AC/DC24V-48V
#4: AC/DC110V-240V
Rated power frequency
50/60Hz
Rated insulation voltage
460V
Hysteresis value
3% fixed
Power indicator
Green LED
Output relay indication
Red LED
Action delay time
0.1s-10s, 10%
Voltage measurement error 1%
Power-on delay time 0.5s
Knob setting accuracy 1%
Reset time 1s
Temperature fluctuation error 0.05%/ C, at=20 C
Output
1 * SPDT
10A/AC1
250VAC
Minimum switching power 500mW
Mechanical life 1 * 10000000
Electrical life (resistance load)
1 * 1000000
Working environment temperature
-20 C- +55 C
Storage and transportation ambient temperature
-35 C- +75 C
Installation method
35mm rail installation
Protection level
IP20
Any Installation location
Installation altitude 2000m
Pollution degree 2
Wiring ability
1 * 2.5mm2 or 2 * 1.5mm2
Dimensions
90mm * 18mm * 64mm / 3.5 * 0.7 * 2.5in (Approx.)
Standard
GB14048.5,
IEC/EN 60225-1


Package list:
1 * Relay
1 * User manual

Features

  • Monitor the working voltage (true RMS measurement).
  • The operating mode can be selected via the rotaries knob.
  • High accuracy, voltage measurement accuracy is 1%.
  • The working status of the relay is indicated by the LED indicator, which is simple and convenient.
  • Compact size, only 18mm width, 35mm rail mounting.
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Brand: KEYREN   |   Manufacturer: KEYREN

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  #13

Motor Control Board, YYB-5 12V 24V Two-Way Relay Motor Forward/Reverse Control Board Two Relay Delay Timing Cycle Module

 Ean: 0712979510731   |    PartNumber: Vikyegnpko63qa1   |   Asin: B07SS4QG59

Features:

100% brand new and high quality 6 kinds of commonly used functions to meet the needs of more applications; It can control 2-way solenoid valve, pumps, motors, lights and other running freely Output power: it can control within 30A DC or AC load Time range: 0.1 seconds to 999 minutes any time adjustable


Specification:

Model:YYB-5
Input voltage: DC/ AC7V~27V

Time range: 0.1 seconds to 999 minutes

Weight: Approx.103g/3.6oz



Wiring port Description:

1. AC/DC : Input 7V~27V

3. IN1: Signal input 1 (negative trigger)

4. IN2: Signal input terminal 2 (negative trigger)

2. IN3: Signal input 3 (negative trigger)

5. NO: relay normally open interface, relay pull before the suspension, after the connection with the COM shorted

6. COM: relay common interface

7. NC: relay normally closed interface, the relay before the connection with the COM shorted, pull after the suspension



Decimal time unit Description:

XX.X decimal point in the ten, timing range: 0.1 seconds to 99.9 seconds

XXX no decimal point, timing range: 1 second to 999 seconds

XXX. Decimal points in a single, timing range: 1 minute to 999 minutes




Package list:

1 x Motor Control Board



Features

  • 100% brand new and high quality
  • 6 kinds of commonly used functions to meet the needs of more applications;
  • It can control 2-way solenoid valve, pumps, motors, lights and other running freely
  • Output power: it can control within 30A DC or AC load
  • Time range: 0.1 seconds to 999 minutes any time adjustable
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Brand: Vikye   |   Manufacturer: Vikye

Item Dimensions: 0.98 x 3.54 x 3.74 inches (2.5 x 9.0 x 9.5 cm)   |   Package Dimensions: 1.85 x 5.43 x 5.47 inches (4.7 x 13.8 x 13.9 cm)

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  #14

Time Mark Corporation A257B Relay; SSR; Phase Monitor; SPDT; Cur-Rtg 10A; Ctrl-V 240AC; Vol-Rtg 480AC; Socke

 PartNumber: D341019-A257B   |   Asin: B00DWIMLHC

Time Mark A257B 3-Phase Power Monitor 480VAC Electrical Phase : 3 Mounting Type : Socket Number of Poles : 1 Operating Temperature Range : -20 to +131 F Phase Sensitivity : Phase Loss, Phase Reversal Special Features : Automatic or Manual Reset Standards Met : CSA, UL Supply Voltage : 480 VAC Terminal Type : Plug-In Time Delay : 50 ms

Features

Brand: Time Mark   |   Manufacturer: Time Mark

Item Dimensions: 4 x 4.63 x 6.5 inches (10.2 x 11.8 x 16.5 cm)   |   Package Dimensions: 2.01 x 2.6 x 4.37 inches (5.1 x 6.6 x 11.1 cm)

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  #15

DiversiTech DSP-1 Corporation Digital Single Phase Line Voltage Monitor

Model: DSP-1   |    Mpn: DSP-1   |    PartNumber: DSP-1   |   Asin: B008HQ3IJ4

DSP-1 is an automatic voltage monitor and controls for three phase powered equipment. By continuously measuring the incoming line voltage, this monitor will detect any voltage outside the tolerances you set. If the limits that you set are exceeded, the response timer will begin counting. You also have the flexibility to set the response timer -- a shorter time may be desired to avoid nuisance tripping. If the voltage remains outside the tolerance after the response time has elapsed, the DSP-1 will turn off its output relay and protect your device. While the output is off, an additional delay timer is activated to avoid rapid re-starts.

Features

  • Digital voltmeter displays instantaneous line voltage
  • Automatic voltage tester adjusts from 90 to 300 volts
  • Adjustable response timer (0.1 to 10 sec.) prevents nuisance tripping
  • Adjustable delay timer (1 to 720 sec.) prevents rapid re-starts
  • Digital display makes for easy viewing and operation
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Brand: Diversitech   |   Manufacturer: DiversiTech

Package Dimensions: 1.2 x 4.3 x 5.2 inches (3.0 x 10.9 x 13.2 cm)

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  #16

Hubbell Wiring Systems HBL2321SW Twist-Lock Watertight Safety Shroud Male Plug, 20 amp, 250VAC, 2-Pole, 3-Wire Grounding, L6-20P, Black/White

Model: 199520   |    Mpn: HBL2321SW   |    Ean: 0783585231105   |    PartNumber: HBL2321SW   |   Asin: B00F1OPYOM

Locking Devices, Twist Lock, Watertight Safety Shroud, Male Plug,, 250V, 2-Pole 3-Wire Grounding, L6-20P, Screw Terminal, Black and White

Features

  • Alignment arrows and lock and unlock symbols provide a visual indication that devices are properly connected
  • Cord grip screw recess minimizes screwdriver slippage
  • One-step automatic Neoprene sealing gland and engineered thermoplastic guard assure sealing when device is fully connected
  • Blades are recessed for protection against bending and breaking
  • External keying provides quick mating of devices
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Brand: Hubbell Wiring Systems   |   Manufacturer: Hubbell

Package Dimensions: 3.8 x 3.9 x 5.5 inches (9.7 x 9.9 x 14.0 cm)

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  #17

Locking Devices, Twist-Lock, Watertight Safety Shroud, Female Connector Body, 20A 250V, 2-Pole 3-Wire Grounding, L6-20R, Screw Terminal, Black and White

Model: HBL2323SW   |    Mpn: HBL2323SW   |    Ean: 0783585231129   |    PartNumber: HBL2323SW   |   Asin: B005T5IWS8

The product type is Locking Devices, Twist-Lock, Watertight Safety Shroud, Female Connector Body, 20A 250V, 2-Pole 3-Wire Grounding, L6-20R, Screw Terminal, Black and White. It is manufactured in United States. It is manufactured by WIRING DEVICE-KELLEMS.

Features

  • The product type is Locking Devices, Twist-Lock, Watertight Safety Shroud, Female Connector Body, 20A 250V, 2-Pole 3-Wire Grounding, L6-20R, Screw Terminal, Black and White
  • It is manufactured in United States
  • It is manufactured by WIRING DEVICE-KELLEMS
  • See more on Amazon...

Brand: Hubbell Wiring Device-Kellems   |   Manufacturer: WIRING DEVICE-KELLEMS

Item Dimensions: 4.4 x 2.57 x 2.57 inches (11.2 x 6.5 x 6.5 cm)   |   Package Dimensions: 3.6 x 3.7 x 5.6 inches (9.1 x 9.4 x 14.2 cm)

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  #18

Locking Devices, Twist-Lock, Watertight Safety Shroud, Receptacle, 30A 250V, 2-Pole 3-Wire Grounding, L6-30R, Screw Terminal, Gray

Model: HBL2620SW   |    Mpn: HBL2620SW   |    Ean: 0783585231662   |    PartNumber: HBL2620SW   |   Asin: B00IL65UU0

The product type is Locking Devices, Twist-Lock, Watertight Safety Shroud, Receptacle, 30A 250V, 2-Pole 3-Wire Grounding, L6-30R, Screw Terminal, Gray. It is manufactured in United States. It is manufactured by WIRING DEVICE-KELLEMS.

Features

  • The product type is Locking Devices, Twist-Lock, Watertight Safety Shroud, Receptacle, 30A 250V, 2-Pole 3-Wire Grounding, L6-30R, Screw Terminal, Gray
  • It is manufactured in United States
  • It is manufactured by WIRING DEVICE-KELLEMS
  • See more on Amazon...

Brand: Hubbell Wiring Device-Kellems   |   Manufacturer: WIRING DEVICE-KELLEMS

Item Dimensions: 2.69 x 3.75 x 3.75 inches (6.8 x 9.5 x 9.5 cm)   |   Package Dimensions: 3 x 4 x 4 inches (7.6 x 10.2 x 10.2 cm)

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