Best Current Monitoring Relays of 2025

Harvey Wall Avatar
Harvey Wall
Last Updated: 29 Jan 2025

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Current monitoring relays are essential components in any electrical system that require constant monitoring and protection against overcurrent or undercurrent conditions. These relays are designed to detect and alert users of any abnormal current fluctuations, which can cause damage to equipment or pose a safety hazard. They are commonly used in industrial and commercial applications such as motor control, lighting, and HVAC systems. With their reliable and accurate monitoring capabilities, current monitoring relays are highly recommended for any electrical system that requires stable and safe operation.

At a Glance: Our Top Picks

Shelly 1PM Mini Smart Switch Relay Cover #TOP 1
Shelly 1PM Mini Smart Switch Relay
ftb score rating icon 9.9
Schneider Electric Modular 3 Phase Control Relay Cover #TOP 2
Schneider Electric Modular 3 Phase Control Relay
ftb score rating icon 9.8
ELKO EP Germany PRI-51/5 Power Monitoring Relay Cover #TOP 3
ELKO EP Germany PRI-51/5 Power Monitoring Relay
ftb score rating icon 9.6

Top 10 Current Monitoring Relays

#TOP 1

Shelly 1PM Mini Smart Switch Relay

3800235261590
2 pack
Shelly 1PM Mini Smart Switch Relay Cover
Shelly 1PM Mini Gen3, WiFi & Bluetooth Smart Switch Relay, 1 Channel, 8A, Power Metering, Home Automation, Remote control, Alexa and Google Home, iOS Android App, No Hub Required (2 Pack)

The Shelly 1PM Mini is a compact WiFi and Bluetooth smart switch relay, allowing you to automate your lights and small appliances easily. With the ability to monitor power consumption up to 8A, you can track energy usage in real time, helping you save money. This device transforms your old electrical appliances into smart devices, providing convenience and control from anywhere. Additionally, the Shelly Smart Control App enables you to manage settings and create custom scenes effortlessly, enhancing your home automation experience.

What We Like
Easy to install and use
Real-time power monitoring
Transforms old appliances into smart devices
Remote control via app
Compact size and durable design
#TOP 2

Schneider Electric Modular 3 Phase Control Relay

RM17TG00
183-528 VAC
Schneider Electric Modular 3 Phase Control Relay Cover
Schneider Electric, Zelio Control, RM17TG00, Modular 3 Phase Supply Control Relay, 5A, 1 CO, 208-480VAC

The Schneider Electric Control Relay offers simple and accurate adjustments, making it easy for you to set up quickly. Its innovative dial pointer LED indicator and diagnostic button are particularly useful for commissioning and troubleshooting, ensuring you can efficiently monitor your equipment. The relay’s plastic material contributes to its durability, while its design meets all monitoring requirements for mobile process control or network equipment, providing you with a reliable solution for your control needs.

What We Like
Easy setup and adjustments
Innovative diagnostic features
Durable plastic material
Suitable for various applications
#TOP 3

ELKO EP Germany PRI-51/5 Power Monitoring Relay

ELKO EP Germany
PRI-51/5
ELKO EP Germany PRI-51/5 Power Monitoring Relay Cover
ELKO EP Germany PRI-51/5 Power Monitoring Relay, Current Range 5.0 A / 24-240 V AC + 24 V DC

The ELKO EP PRI-51/5 Relay is a reliable power monitoring solution designed for current monitoring up to 600 A. With a current range of 5 A, it allows you to easily track and manage electrical consumption. Operating at a voltage range of 24-230 V, this relay can adapt to various electrical systems, providing flexibility for your needs. Its convenient clip mounting for DIN rail 35 mm ensures straightforward installation, making it a practical choice for both professionals and DIY enthusiasts.

What We Like
High current monitoring capability
Flexible voltage range
Easy DIN rail installation
Compact design
#TOP 4

Adjustable AC Current Sensing Switch 0.2-30A

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Adjustable AC Current Sensing Switch 0.2-30A Cover
AC Current Sensing Switch, Adjustable Current Sensing Switch, 0.2-30A SZC23-NO-AL-CH Current Sensing Switch for Automated Industrial Equipment

The Tyenaza AC Current Switch is an essential tool for monitoring AC current in automated industrial equipment. Its adjustable action current of 0.2-30A allows you to tailor the settings to your specific needs. The LED indicator provides a clear visual of the switch's working status, making it easy for you to monitor operations. With a high-power MOS tube contactless electronic switch, you benefit from reliable performance and a swift reaction speed reaching the millisecond level, ensuring your equipment operates smoothly and efficiently.

What We Like
Wide current range 0.2-30A
LED status indicator
Fast reaction speed
Contactless electronic switching
No opening/closing limit
#TOP 5

Schneider Electric Zelio Control Current Relay

RM35JA32MW
Schneider Electric Zelio Control Current Relay Cover
Schneider Electric, Zelio Control, RM35JA32MW, Modular 1-phase current control relay, 5A, 2CO, 150mA-15A 24-240VAC/DC

The Zelio Control Relay by Schneider Electric offers a straightforward way to monitor your equipment. Its design allows for simple and accurate adjustments, ensuring a quick and easy setup process for you. With an innovative dial pointer LED indicator and a diagnostic button, commissioning and troubleshooting become hassle-free tasks. Additionally, the inclusion of a QR code on the instruction sheet makes setting up even more convenient, providing instant access to useful information.

What We Like
Easy equipment monitoring
Quick setup adjustments
Innovative troubleshooting features
Convenient QR code access
#TOP 6

GEYA Current Monitoring Relay with Adjustable Delay

GRI8-01/2
0.2-2A
GEYA Current Monitoring Relay with Adjustable Delay Cover
GEYA Current Monitoring Relay Overcurrent Undercurrent Protection Relay(0.2-2A,AC/DC24V~240V)

The GEYA Current Relay offers exceptional features to enhance your current monitoring needs. With an adjustable delay of 0.5-10 seconds, you can effectively eliminate short current peaks, ensuring stable operation. The flexible adjustment via a potentiometer allows you to select from six different ranges, catering to various applications. Additionally, the relay can be used for current scanning from a current transformer, adding versatility to your setup. It operates universally with an AC/DC supply of 24-240V, making it adaptable for different environments.

What We Like
Adjustable delay feature
Multiple current ranges
Versatile current scanning
Universal power supply
LED status indication
#TOP 7

HELLA 24V Mini Relay with Holder

965400101
Multi
HELLA 24V Mini Relay with Holder Cover
HELLA 4RA 965 400-101 Relay, main current - 24V - 4-pin connector - Normally Open Contact - with holder

The HELLA 24V Relay is a compact, normally open relay designed for efficient current monitoring. With a maximum rated switching current of 30 A, it can easily handle demanding tasks, providing you with reliability in various applications. The relay boasts an impressive lifespan of up to 100,000 switching operations, ensuring long-lasting performance. Its coil resistance of 320 Ohm makes it suitable for a range of electrical systems, giving you peace of mind when it comes to your power management needs.

What We Like
Compact design
High switching current capacity
Long operational lifespan
Versatile temperature range
#TOP 8

DPA51CM44 3-Phase Monitoring Relay for Systems

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DPA51CM44 3-Phase Monitoring Relay for Systems Cover
DPA51CM44 3-Phase Monitoring Relay, Current/Voltage Monitoring Relay Phase Sequence Protector for three-phase System, Without Neutral, phase Loss and Incorrect phase Sequence, 208-480VAC

The DPA51CM44 Monitoring Relay is designed to enhance the efficiency of three-phase systems. Its compact size allows for easy installation in various locations, making it a practical choice for users. This multi-functional relay is ideal for applications such as motor protection and air conditioning systems, providing essential safety features. With its strong anti-interference performance, you can rely on it to maintain consistent operation, ensuring your equipment runs smoothly. Additionally, the built-in LED indication simplifies installation and troubleshooting, offering peace of mind during operation.

What We Like
Compact and easy to install
Multi-functional for various applications
Strong anti-interference performance
LED indication for troubleshooting
#TOP 9

3-Phase Monitoring Relay with Digital Display

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3-Phase Monitoring Relay with Digital Display Cover
3-Phase Monitoring Relay 380V AC 50Hz 3 Phase Sequence Relay Protector Voltage Protective Relay with Digital Display Overvoltage Undervoltage Unbalanced Voltage, Relay

The YWBL-WH Monitoring Relay offers real-time monitoring of motor faults such as over-current, under-current, and voltage imbalances. This ensures you can quickly identify issues, helping to prevent damage to your equipment. Its flexible settings allow you to adjust over-voltage and under-voltage values, making it easy to tailor the relay to your specific needs. The digital LCD display provides clear readings of voltage values and fault statuses, so you can easily keep track of your system's performance.

What We Like
Real-time fault monitoring
Adjustable voltage settings
Clear digital display
Easy to install
Modular design
#TOP 10

Acogedor DPA51CM44 3-Phase Monitoring Relay

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Acogedor DPA51CM44 3-Phase Monitoring Relay Cover
3 Phase Voltage Monitoring Relay, 208-480VAC Three-Phase Sequence Protection Relay, for Phase Sequence and Phase Loss

The DPA51CM44 Monitoring Relay is designed to ensure the constant and efficient operation of your motor. With strong anti-interference performance, it protects your equipment from disruptions, allowing you to focus on your tasks without worry. Its compact size makes installation straightforward, saving you time and effort. This versatile relay is ideal for various applications, including motor protection, elevators, air conditioning systems, and power systems, providing peace of mind in any industry.

What We Like
Strong anti-interference performance
Compact and easy installation
Maintains motor efficiency
Versatile for multiple industries
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is current monitoring relay?

Current Monitoring (Current Relay) Current monitoring relay when senses the current flowing through the device is greater than the defined range of current then it turns off the machine and protects the device from damage due to over current. This is referred to as over-current protection.

2. What is a phase monitoring relay?

The devices provide protection against phase loss, phase reversal, and phase unbalance due to blown fuses, broken wires or worn contacts. They monitor simultaneous voltage drops/increases and help to prevent damaged machinery and the injury of personnel.

3. What is a voltage monitoring relay?

Simple and effective monitoring. Eaton's voltage monitoring relays are solid-state protective relays that automatically operate when one or more phases of the three-phase supply is lost, or when the phase sequence is reversed.

4. What is 3 phase monitoring relay?

Three Phase Monitoring Relays or Protective Relays, protect motors and equipment from expensive damage due to voltage faults on three-phase systems.

Editor's Notes

During our current monitoring relay research, we found 17 current monitoring relay products and shortlisted 10 quality products. We collected and analyzed 13,887 customer reviews through our big data system to write the current monitoring relays list. We found that most customers choose current monitoring relays with an average price of £26.77.

The current monitoring relays are available for purchase. We have researched hundreds of brands and picked the top brands of current monitoring relays, including Shelly, Schneider Electric, ELKO EP Germany, Tyenaza, GAEYAELE.

Written by
Harvey Wall Avatar

Harvey Wall was born and raised in Norwich. He mastered the art of tool production and finished at the prestigious Norwich University. His area of interest include cutting tools, abrasive finishing and power tools. Harvey is always looking for ways to improve the finesse of industrial tools via his myriads of researches. He also shares some of his experiences on many platforms while writing on tool products.