DC Insulation Monitor


Standard Lead Time:
Sample: 2 days
Bulk: 1 month

  • System: 200~1000VDC
  • Auxi. Power: 9~36VDC
  • Insulation Resistance: 20 kΩ~10MΩ
  • Response Time: 3 ~ 60s


What Do Our Customers Say?

  • Acrel is one of the best supplier for me. They are so easy to communicate and very friendly. They even give an online tour of their factory. Looking forward for more business together in the future.

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  • “ For over 4 years working with Acrel, they have continuously demonstrated excellent technical ability while ensuring superior customer service. Their collaborative approach and real time flexibility in adapting to changing conditions has contributed to the success of many project goals. "

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  • Cloud Platform for Power IoT is a synchronous integrated solution from energy meter installation to web interactive interface that can see the benefits of features with the first click mouse. Very convenient and fast. I will be with this product for a long time.

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What’s the Highlight of Acrel AIM Series DC Insulation Monitor?


  • 200-1000V DC
  • between the positive and negative terminals
  • between the positive and negative terminals to the ground

Insulation Resistance

  • 20 kΩ~10MΩ
  • between the positive and negative terminals to the ground
  • Response Time: adjustable from 3 ~ 60s


  • Alarm occurrence time
  • Fault type
  • 20 SOE


  • RS485


What’s the Application of Acrel AIM Series DC Insulation Monitor?

DC EV Charger
Solar System
Energy Storage System
DC State Grid


What’s the Parameter of Acrel AIM Series DC Insulation Monitor?

Power supply 9~36VDC
Power consumption ≤6W
System voltage 200~1000VDC
Alarm Over voltage 110% System voltage
Under voltage 90% System voltage
Insulation monitor Resistance range 20 kΩ~10MΩ
Alarm range 20kΩ~10MΩ, 2 relay settable
Internal DC impedance < 1MΩ
Output 2 relay output, N/C or N/O settable
Communication RS485 Modbus-RTU protocol
Fault record 20 records fault
Installation Din rail
Environment Working Environment -15~+55℃
Storage Environment -20~+70℃
Relative humidity < 95%
Elevation < 2000m


What’s the Function of Acrel AIM Series DC Insulation Monitor?

  • Real-time measurement and display of the voltage between the positive and negative terminals in the DC system, also voltage between the positive and negative terminals to the ground, the measuring voltage range is 200V~1000V.
  • Monitor the voltage fluctuation of the system in real time, and send alarm signal in time when it is over voltage or under voltage.
  • Measure the insulation resistance of the positive and negative terminals to ground real time in the DC system. When the resistance is lower than the set alarm value, the alarm signal will be sent.
  • The insulation monitoring response time is adjustable from 3 to 60s.
  • There are 2 adjustable relay output to set insulation resistance alarm value, optional N/C or N/O.
  • 128*32 LCD display, LED alarm indication.
  • Event record function, which can record the time and fault type while alarm occurs, it is convenient for the maintenance operator to analyze the operating status of the system in time.
  • RS485 Modbus-RTU protocol, it can realize data exchange of the system.
  • Standard 35mm din rail installation


How to wire the Acrel AIM Series DC Insulation Monitor?

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Why choose Acrel?

  • 2003 Established
  • SZ.300286 Listed Company
  • 1200+ People
  • 25000+㎡ Plant
  • Factory Direct-sale


Got a Question? Get your Answer

What are the Main Advantages of Acrel?

We have our own Factory and R&D Center

What are the Difference between Acrel and other Brands?

Rich product series: Cloud Platform, Gateway, Protection Device, Power Meter, Transformer

What Certificates does the Company have?

CNAS, ISO14001, ISO27001, ISO9001

What Certificates do the Products have?


How Expensive is Acrel Products?

Competitive Price with High Quality

How long is the product Warranty Period?

2 Years

What is the MOQ?

Purchasing according to your needs, no MOQ limit

How long is the Lead Time?

Sample takes 3 days; Bulk purchase takes 1 month

Line Isolation Monitor


IEC 61557-1:2019

IEC 61557-8:2014

IEC 61557-9:2014

IEC 61326-2-4:2012

IEC 61000-4-8:2009


Standard Lead Time:
Sample: 2 days
Bulk: 1 month

  • MV&HV Switchgear
  • Insulation monitoring
  • over temperature monitoring
  • Wiring status monitoring
  • Fault alarm output
  • Overload monitoring