Tang Xueyang

Ankerui Electric Co., Ltd. Shanghai Jiading 201801

What is a DC insulation monitoring device?

DC insulation monitoring device is a safety protection equipment used for real-time monitoring of the positive and negative pole to ground insulation status of DC power supply systems. Its core task is to issue warnings before insulation faults cause accidents (such as electric shock, short circuit, system collapse), acting as a "safety sentinel" for DC systems. With the development of industry, many electrical and factory equipment are powered by DC systems, and the positive and negative poles of the DC system are not grounded. For ungrounded (IT) distribution systems, insulation resistance monitoring should be carried out to ensure the safe operation of the power supply system.

Application scenarios of DC insulation monitoring instrument

Power system: DC screens for power plants and substations (control power, protection power, operation power, emergency lighting power). Rail transit: traction power supply DC system, vehicle auxiliary system, signal system power supply for subway and high-speed rail. Industrial field: DC control power supply for large factories and mines, UPS backup battery system, power supply for electrolytic plating equipment. Data center/communication base station: communication power system, UPS backup battery pack. Ships and offshore platforms: DC power distribution systems for ships. Electric vehicle charging facilities: DC bus insulation monitoring of charging piles (safety requirements). Photovoltaic power generation system: Insulation monitoring on the DC side of photovoltaics (safety standard requirements).

Introduction to Ankerui DC Insulation Monitoring Instrument

In scenarios such as photovoltaic power plants, energy storage systems, and DC power supply panels, insulation faults in DC systems are often the "hidden killers" that cause safety accidents. How to monitor insulation resistance in real time and warn of risks in advance? The AIM-D100-T series DC insulation monitoring instrument launched by Ankerui Electric has become the "guardian angel" to ensure the safe operation of DC systems with core advantages such as high-precision monitoring, intelligent warning, and multi scenario adaptation.

Product core function: Make hidden dangers nowhere to hide

Accurate monitoring, dual protection of insulation

Resistance monitoring:Real time detection of positive and negative pole to ground insulation resistance (1k Ω~10M Ω). When the resistance is below the set threshold, a warning or alarm signal is triggered to avoid short circuit accidents caused by insulation failure.

Voltage monitoringSynchronize monitoring system voltage, positive and negative pole to ground voltage, support overvoltage (≥ 110% rated value) and undervoltage (≤ 90% rated value) alarms, and safeguard system stability.

Intelligent interaction, clear at a glance

Dual screen display:The 128 * 32 dot matrix LCD screen displays parameters clearly, paired with LED indicator lights (running, communication, fault, etc. status), and fault information is instantly visible.

Event logAutomatically store 20 fault records, including time, type, and value, to help quickly identify the root cause of the problem.

Flexible networking and remote control

Supports RS485 communication and Modbus RTU protocol, easily connects to industrial automation systems, and enables remote monitoring and data exchange.

3-channel relay output (normally open/normally closed optional), can be connected to external sound and light alarms or linked control devices, creating an intelligent safety network.

Technical highlight: specially designed for industrial scenarios

Wide voltage adaptation:Covering DC 10-1000V (divided into TH/TL models), suitable for various systems such as photovoltaics, energy storage, DC screens, UPS, etc.

Anti interference design:Adopting the principle of unbalanced bridge to avoid detection blind spots when both positive and negative poles are grounded simultaneously; Built in anti capacitance interference algorithm, system leakage capacitance ≤ 5 μ F can still be accurately measured.

Minimalist installation35mm rail installation+plug and unplug terminal wiring, quick deployment in 10 minutes, saving time and effort.

Application scenario: Covering thousands of industries and businesses

Photovoltaic DC system:Real time monitoring of the insulation status of the combiner box and inverter front-end to prevent fires caused by single pole grounding.

Substation DC screen:Ensure the insulation safety of the backup battery power supply system and guarantee the continuous and stable operation of monitoring equipment.

Electric vehicle charging station:Monitor the insulation performance of the charging module to enhance charging safety and user trust.

Conclusion

In the wave of industrial intelligence, safety is always the primary productive force. The AIM-D100-T series DC insulation monitoring instrument, with precision monitoring and intelligent warning as its core, builds a strong safety defense line for DC systems in various industries. Choose Ankerui, choose Anxin!

DC insulation monitoring instrument for charging stations

With the development of industry, many electrical and factory equipment are powered by DC systems, and the positive and negative poles of the DC system are not grounded. For ungrounded (IT) distribution systems, insulation resistance monitoring should be carried out to ensure the safe operation of the power supply system.

The AIM-D100 series DC insulation monitoring device is specifically designed for DC insulation monitoring and can be applied in DC systems ranging from 10 to 1500V. It is used for online monitoring of the positive and negative pole to ground insulation resistance of ungrounded DC systems. When the insulation resistance is lower than the set value, it will issue a warning or alarm signal.

The product is based on the principle of unbalanced bridge, which avoids the problem of inability to detect insulation resistance when the balanced bridge has grounding faults in both positive and negative poles.

The product can be applied to DC systems such as power generation manufacturers, DC screens in substations, electric vehicle charging devices, UPS power supply systems, photovoltaic DC systems, energy storage systems, and other DC power grids.

Product Features and Selection

DC insulation monitoring instrument for charging stations

The electric vehicle charging device generally consists of a cabinet, multiple AC to DC charging modules, an intelligent switching unit, measuring instruments, controllers, contactors, charging guns, etc.

This example is a dual gun 120kW DC charging station. The intelligent switching unit controls the charging module, the DC meter measures current, the insulation monitor measures insulation voltage and insulation resistance, and the insulation monitoring is controlled by the controller. When the charging station is in use and charging gun A or B is used separately, the controller sends a command to control the corresponding IMD 1 or IMD2 insulation monitoring instrument to perform insulation monitoring first; When charging guns A and B are used simultaneously, the controller sends a command to control IMD 1 insulation monitoring device to perform insulation monitoring first. By coordinating the operation of the controller and insulation monitoring device, the safety, stability, and reliability of the DC charging system are ensured.

AIM-D100-CA series DC insulation monitoring instrument

1 Overview

With the development of industry, many electrical and factory equipment are powered by DC systems, and the positive and negative poles of the DC system are not grounded. For ungrounded (IT) distribution systems, insulation resistance monitoring should be carried out to ensure the safe operation of the power supply system.

The AIM-D100-CA series DC insulation monitoring instrument can be applied in DC systems ranging from 100 to 1000V for online monitoring of the positive and negative pole to ground insulation resistance of ungrounded DC systems. When the insulation resistance is lower than the set value, it will issue a warning or alarm signal.

The product is mainly designed for insulation monitoring of electric vehicle charging devices in the DC 100~1000V range, and can also be applied to DC systems such as energy storage DC, DC screens in substations, UPS power supply systems, photovoltaic DC systems, and other DC power grids.

2 Model Description

3 Functional Features

Resistance monitoring function. The product can monitor the insulation resistance of the positive and negative poles of the DC system to ground. When the insulation resistance is lower than the set warning and alarm values, it can issue warning and alarm signals.

Voltage monitoring function. The product can monitor the voltage between the positive and negative poles of the DC system, as well as the voltage between the positive and negative poles to ground, with a measurement range of 100-1000V.

■ Current monitoring function. The product can monitor DC system current, only the AIM-D100-CAI model has this function.

■ LED indicator function. The product panel has operation, communication, and fault LED indicator lights, which can display the product status.

■ Communication networking function. The product has one RS485 interface and adopts Modbus RTU protocol for data exchange.

■ Metal casing. The product adopts a metal shell, wall mounted installation, and can also be installed using accessory rails.

■ Plug and unplug terminals. The product adopts plug-in terminal wiring, which is convenient for wiring and installation.

AIM-D100-CAD Dual DC Charging Pile Insulation Monitoring Instrument

1 Overview

With the development of industry, many electrical and factory equipment are powered by DC systems, and the positive and negative poles of the DC system are not grounded. For ungrounded (IT) distribution systems, the DC charging pile insulation monitoring device can be applied in DC systems ranging from 100 to 1000V for online monitoring of the positive and negative pole to ground insulation resistance of the ungrounded DC system. When the insulation resistance is lower than the set value, a warning or alarm signal is issued.

The product is mainly designed for insulation monitoring of electric vehicle dual gun charging piles in the DC 100~1000V range, and can also be applied to DC systems such as energy storage DC, DC screens in substations, UPS power supply systems, photovoltaic DC systems, and other DC power grids.

2 Model Description

3 Functional Features

Resistance monitoring function. The product can monitor the insulation resistance of the positive and negative poles of the DC system to ground. When the insulation resistance is lower than the set warning and alarm values, it can issue warning and alarm signals.

Voltage monitoring function. The product can monitor the voltage between the positive and negative poles of the DC system, as well as the voltage between the positive and negative poles and ground. When the positive and negative poles are reversed, the instrument will prompt reverse connection when reading data after operation.

Dual independent monitoring. The product has two independent monitoring functions, which can respectively monitor the insulation level and voltage of the two DC systems.

Dual independent alarm. The product has two independent alarm functions, which can set two warning values and two alarm values respectively.

■ LED indicator function. The product has two RGB LED indicator lights, which can display the product status through different colors and frequencies.

■ Dialing setting function. The product can set the communication baud rate and communication address through a combination of dip switches.

■ Communication networking function. The product has one RS485 interface and adopts Modbus RTU protocol for data exchange.

■ Communication triggers activation. The product uses communication function to start insulation monitoring. After starting, the insulation resistance and positive and negative pole to ground voltage are monitored once. After the monitoring is completed, it is disconnected from the ground without affecting the insulation level of the DC system to ground.

The installation method is optional. The product adopts a plastic shell and is compatible with both rail and wall mounting installation methods. The default installation method is rail mounting.

■ Plug and unplug terminals. The product adopts plug-in terminal wiring, which is convenient for wiring and installation.

Industrial DC bus insulation monitoring device

Industrial DC bus insulation monitoring device