Top Numerical Protection Relay Reviews

Over-Voltage Under-Voltage Protection Monitoring Relay Circuit Breaker Adjustable Control Module DC 12V/24V/36V/48V(DC24V)

Voltage RegulationWhen a faulty line occurs, the voltage protection relay can adjust the overvoltage value and the action time, and record the fault for more flexible use..
Real-time MonitoringThe voltage protection relay can monitor overvoltage and undervoltage faults in real time and take protective measures in time..
LED DisplayThe voltage protection relay includes two sets of normally open and closed contacts, and the two indicator lights respectively indicate different working states..
Rail MountingThe voltage protection relay adopts a standard modular structure and is mounted on a 35mm rail without additional auxiliary power..
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Shuian 10 Pcs 3V Relay Power Switch Board, Songhe DC 1 Channel Optocoupler Relay, High Level Trigger for IOT ESP8266 Development Board.

The 3v Relay 1 Channel power switch module compatible with 10A 250VAC and 10A 30VDC load.4pcs * 2.5 mm Fixed Bolt Hole..
3V/3.3V power relay module supports photocoupler isolation control and dual power supply input ensure high anti-interference ability. Fast response time less than 20ms and long life time up to 100,000 times snap action with diode freewheel protection..
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..
Support dual power supply input ensure high anti-interference ability,high reliability of photoelectric isolation protection,The external connection uses the rotary crimping terminal, causes the wiring to be more solid..
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..

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GRV8-03 Monitoring Relay, 176V-552V Ultrasmall Three Phase Voltage Relay Voltage Monitoring Relay Adjust for Mobile Device Connection Control(M265)

...r 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.
Multi-functioanl: This DPA51CM44 3-Phase Monitoring Relay has a widely use on the electric filed, and it can be applied to motor protection, elevator, air conditioning system, power system and other industries, very helpful tool during daily life.
Work Well: DPA51CM44 3-Phase Monitoring Relay features with strong anti-interference performance, so it helps maintain a constant and efficient work of the motor, it will provide an excellent performance during the working process.
3-Phase Design: This Current Monitoring Relay is designed with 3-Phase Monitoring Relay to provide a correct phase sequence, without neutral, phase Loss and Incorrect phase sequence, so it can detect when all phases are present and have the correct sequence.
LED Indication: This DPA51CM44 Monitoring Relay features an LED indication for easier installation and trouble shooting, which permits a maximum degree of protection to be achieved for machines, plants and systems, and avoid far more significant subsequent damage, very convenient and useful.

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AITRIP 8 Pack 3V 1 Channel Relay Power Switch Module with Optocoupler Opto Isolation High Level Trigger for IOT ESP8266 Development Board

【30VDC 250VAC Load】 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..
【High Level Trigger】The relay module is triggered by high level signal, which can be input from microcontroller IO..
【 3V/3.3V power relay module】- This Relay Board provides a single relay that can be controlled by any 3V/3.3V digital input from your microcontroller IO..
【Wide Application】- These 3v relay board works well with ARM /PIC /AVR /MCU/Raspberry/CNC machine/ PS4/3.3V /NodeMCU/ ESP8266 module etc..
【Long Life】 - Fast response time less than 20ms and long lifetime up to 100,000 times snap action with diode freewheel protection..

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Wiring Harness 1 Lead, YCHOW-TECH Wiring Harness for LED Light Bar 12V 40A On/Off Rocker Switch Blade Fuse Power Relay Heavy Duty Light Bar Wiring Harness Kit for Truck UTV AVT Boat

Power Relay Fuse: 30A Fuse. Our luxurious Nylon Wiring Harness Kit loads capacity is up to 400W auxiliary lights or other devices, perfect compatible with all devices that use a 12V power source..
HIGH DURABILITY - The flexible strand copper wire and nylon shell provide outstanding electrical conductivity, high temperature resistance and melting resistance..
SAFETY PROTECTION - Power relay for safety and conversion circuit, blade fuse for overload and short-circuit protection. Double protection for you to drive away from danger..
8.2 FT Length Wiring Harness - Approx. 8.2 ft of cable from relay to the lead, the wire is long enough to reach all the part you need..
Package Include - (1) 8.2 ft Nylon jacket wiring harness.

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EATON CUTLER HAMMER - XTOB040DC1 - OVERLOAD RELAY

APPLICABLE OCCASIONS: Suitable for power systems with rated isolation voltage up to 690V and circuit 50-60hz..
PRODUCT FUNCTION: This relay can be used as an overload protection for long-term or indirect long-term maintenance of the motor..
FUNCTION: This relay is used for protecting the phase break when the electric motor is overload..
VERSATILE: The relay has different mechanism and temperature compensation..
EASY TO OPERATE: With phase break protection, manual and automatic reset, temperature compensation, trip indication, test button and stop button..

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AC 480V 3 Phase Circuit Protection Voltage Monitoring Relay 5 Indicators Heavy Duty Phase Failure Sequence Protection Relay Stable for Air Compressors

Convenient Monitoring: The voltage relay can monitor its own operating voltage (true rms measurement)..
High Accuracy: The voltage relay has 8 adjustable rated voltages, and the voltage measurement accuracy is less than 1%..
Application: Equipment protection and control (tower cranes, elevators, agricultural equipment, refrigerated trucks).
LED Indicator: The working status of the voltage control relay is indicated by the LED indicator..
Small Size and Easy to Install: The voltage protection relay is ultra-small and can be mounted on a 35mm DIN rail..

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Painless Performance 30133 Weatherproof PCM Controlled Fan Relay Kit, Ground Activated

Inexpensive protection for an electric fan and a vehicle's wire harness.
Relay activation by grounding the relay coil can be provided by most Powertrain Control Modules.
Provides direct battery power, protects PCM from voltage spikes and prevents the fan from back feeding through the vehicle's wire harness.
Kit includes weatherproof: SPST 35-amp relay, 30-amp circuit breaker, relay base with 10' harness, crimp-on terminals and mounting hardware.

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

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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Siemens 3UG4512-1BR20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Screw Terminal, 2 CO Contacts, Delay Time, 160-690 Line Supply Voltage

Convenient Monitoring: The voltage relay can monitor its own operating voltage (true rms measurement)..
High Accuracy: The voltage relay has 8 adjustable rated voltages, and the voltage measurement accuracy is less than 1%..
Application: Equipment protection and control (tower cranes, elevators, agricultural equipment, refrigerated trucks).
LED Indicator: The working status of the voltage control relay is indicated by the LED indicator..
Small Size and Easy to Install: The voltage protection relay is ultra-small and can be mounted on a 35mm DIN rail..

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3v Relay Board Raspberry Pi Arduino Relay Module 1 Channel Opto-Isolate High Level Trigger for IOT ESP8266 Microcontrollers Development Board

【1 Channel Relay Module】- This Relay Board provides a single relay that can be controlled by any 3V/3.3V digital input from your microcontroller IO..
【Main Specification】- The 3v Relay 1 Channel power switch module compatible with 10A 250VAC and 10A 30VDC load.4pcs * 2.5 mm Fixed Bolt Hole..
【Adopted Optocoupler Isolation】- 3V/3.3V power relay module supports photocoupler isolation control and dual power supply input ensure high anti-interference ability. Fast response time less than 20ms and long life time up to 100,000 times snap action with diode freewheel protection..
【Jumper Caps】You can select whether the relay and the signal use the same power supply or not by removing the jumper caps on the pins. And It is better to share the same power supply, because that is more convenient for using..
【Wide Application】- These 3v relay board works well with Arduino/ ARM /PIC /AVR /MCU/Raspberry/CNC machine/ PS4/3.3V /NodeMCU/IOT/ ESP8266 module etc..

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ELEGOO 8 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 1280 DSP ARM PIC AVR STM32 Raspberry Pi

5V 8-Channel Relay interface board, each one needs 70mA Driver Current.
Equiped with high-current relay, AC250V 10A.
Each relay has normally open and normally closed contact. Can be selected by jumper relay and TTL or ground..
With power indicator,8-way road has a status indicator. With a relay coil to absorb the diode protection..
Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
The 8 channels are optically isolated, safe, reliable, anti-interference. Widely used for all MCU control, industrial sector, PLC control, smart home control。For a complete data sheet for this relay board, please download it from: http://dwz.win/UhW.

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Hubbell TD1000 Digital Display Module

Support AC and DC control signal, Relay action LED indicator, relay coil protection by means of a freewheeling diode..
Panasonic PA1a SPST-NO 5Amp power relay. Original Panasonic PA1a-PS pluggable socket for support replacement relay, and with removal key..
Dinkle high quality fireproof nylon material DIN rail mount housing, can support width 35mm, 32mm and 15mm rail..
High quality screw terminal blocks and clear marking label for terminal block position. Pitch 5.08mm/0.2" and 7.62mm/0.3" screw terminal block. Wire range 26 to 12AWG / 2.5mm square. Screws - M2.5, steel, Cr3+ Zn plated. Pin header and Cage - Brass..
High quality glass fiber FR-4 PCB, top and bottom dual copper layers..

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