Best Monitoring Relay

GRV8-02 Single Phase Monitor Relay, Keenso Adjustable Voltage Monitoring Relay Over Voltage Protection AC/DC Voltage Monitoring Relay A220V/ D12V/ AD24-48V/ AD120-240V (GRV8-02/AD240V)

  • 【Effective & Accurate monitoring】-- This GRV8-02 Single Phase Monitor Relay mainly used to monitor the working voltage(true RMS measurement). 100% High accuracy, voltage measurement accuracy is ≤ 1%..
  • 【Built-in LED Display】-- With built-in LED indicator, you can easily get the working status of the relay is indicated, very simple and convenient to use. The operating mode can be selected via the rotary knob..
  • 【Super Function】-- Apply to over voltage protection for electrical equipment or compressors, emergency/backup power switching control. 100% safe and practical AC/DC Monitor Relay..
  • 【Compact & Practical】-- GRV8-02 Monitoring Relay in professional design, compact size, only 18mm width, 35mm rail mounting. Portable and practical for you to operate!.
  • 【Keenso Service】-- 100% test before shipping, fast money refund & perfect customer service! If You Have Any Questions, Just Connect Us By QA & E-Mail.
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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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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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AC Current Sensing Switch Flameproof Adjustable 0.2~30A IP30 Self-Powered Sensing Switch(Normally Closed)

  • Control of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment..
  • Using the electromagnetic mutual inductance principle of current, the advanced switch output detection, monitoring and protection alarm type products without power supply technology are adopted..
  • Widely used in substation, frequency control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other need current monitoring automation industry..
  • Compared with traditional transformer and thermal protector, it has the advantages of high accuracy, stable performance and long service life..
  • The current-sensing switch is for safe, convenient monitoring or detecting the current of electric equipment. An ideal choice for automatic industrial control equipment and electric power monitoring..
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Siemens 3UG4631-1AA30 Monitoring Relay, Single Phase Voltage Monitoring, Screw Terminal, 1 CO Contacts, 0.1-60VAC/DC Measuring Range, 0.1-30V Hysteresis, 0-20s Delay Time, 24VAC/DC Auxiliary Voltage

  • Features: Undervoltage protector integrates three-phase voltage protector, chronograph and counter in one.
  • Multifunction: The protection relay has protection functions such as overvoltage, undervoltage, phase loss, phase sequence, three-phase voltage unbalance, etc.
  • Practical functions: The voltage monitoring relay has functions such as start-up delay and output test. 2 rest module optional, manual and automatic.
  • Specification: Monitoring Circuit: L1, L2, L3.
  • LCD Display: LCD data display, easy to read, no external power supply required.
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Phase Monitoring Relays JVR800-2 Under Over Voltage Protector, Three-Phase Voltage Monitoring Sequence Protection Relay with

  • This monitoring relay can monitor own working voltage..
  • 8 kinds of rated voltages are adjustable, can apply to voltages in all regions of the world.
  • The working status of the relay is indicated by the LED indicator.
  • Ultra-small size and it is easy to install..
  • It is applied to mobile device connection control, causing accidents in equipment protection against reverse operation, normal/emergency power switch, preventing phase failure of power load..
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Three Phase Voltage Monitoring Relay, Three Phase Voltage Small Monitoring Relay Phase Sequence Relay for Mobile Device Connection Control for Mobile Device(M265)

  • This monitoring relay can monitor own working voltage..
  • 8 kinds of rated voltages are adjustable, can apply to voltages in all regions of the world.
  • The working status of the relay is indicated by the LED indicator.
  • Ultra-small size and it is easy to install..
  • It is applied to mobile device connection control, causing accidents in equipment protection against reverse operation, normal/emergency power switch, preventing phase failure of power load..
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Siemens 3UG4511-1AP20 Monitoring Relay, Three Phase Voltage, Insulation Monitoring, 22.5mm Width, Screw Terminal, 1 CO Contacts, Delay Time, 420-690 Line Supply Voltage

  • This monitoring relay can monitor own working voltage..
  • 8 kinds of rated voltages are adjustable, can apply to voltages in all regions of the world.
  • The working status of the relay is indicated by the LED indicator.
  • Ultra-small size and it is easy to install..
  • It is applied to mobile device connection control, causing accidents in equipment protection against reverse operation, normal/emergency power switch, preventing phase failure of power load..
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ABB 1SVR730760R0500 CM-SFS.22S CURRENT MONITORING RELAY

  • Current sensing relay for monitoring electrical current.
  • Current carrying wire is routed through an aperture.
  • Electrical isolation between circuits (SPDT).
  • Variable trip point range with adjustable timer for stability.
  • UL recognized for safety and RoHS compliant for hazardous substances.
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