Why Need DC Insulation Monitoring
With the global energy crisis, rising energy consumption and the development of new energy technologies, new energy power generation has become more widespread and gradually formed a new type of energy and power market. As an important part of new energy applications, DC systems are also increasingly widely used.
The AIM-D series DC insulation monitors are specially designed for DC systems, used for earth fault detection in ungrounded DC systems. When an earth fault occurs in the DC system, it can send out an insulation fault alarm signal.
Application
The products can be applied to DC systems such as DC panels in power plants and substations, electric vehicle charging equipment, UPS power supply systems, energy storage systems and other DC power grids.
The Standard For DC Insulation Monitoring
- BB.2.2 Requirements of IMD and discharge circuit
- BB.5.11 Insulation fault monitoring- HH.6 Insulation monitoring device
- HH.7 IMD reaction time
- HH.8 Conclusion
CCS Requirements for Insulation Monitoring:
- Maximum monitored insulation resistance: up to 2 MΩ
- Maximum system leakage capacitance Ce: 20 μF
- Response time tan: maximum 10 s when Ce ≤5uF，or RF≤100kΩ
- Detection Voltage Range: DC150V (50V optional) DC500V, or DC150V (50V optional) DC1000V
- Detection Method: Ground fault detection via neutral point earthing, or insulation monitoring device that injects DC pulse waves (with absolute value of peak voltage less than or equal to extra-low safety voltage) into the DC output.
- Sensing Performance:
The following requirements shall be met over the full range of output voltage:
1. When the insulation resistance between the output circuit and the enclosure including the vehicle chassis deteriorates to less than or equal to 100 Ω/V or 100 kΩ (DC1000V), the operating sequence shall be terminated.
2. When a 0 Ω ground fault is detected, the operating sequence shall be terminated.
- Operating Time: ≤ 10 s
- Anti-maloperation Time: ≥ 0.2 s
- Resistance: ≥ 40 kΩ (DC150V to DC500V) or ≥ 80 kΩ (DC150V to DC500V)
We Developed The Products By Application
2. Measures the voltage between positive and negative poles, as well as the grounding voltage of positive and negative poles, with over-voltage and under-voltage alarm functions.
3. Equipped with LED indication and LCD display functions.
4. 3-channel relay output, normally open / normally closed 5. configurable.
6. RS485 communication, supporting Modbus-RTU protocol.
7. Stores up to 20 event logs.
8. 4-module DIN rail mounting with pluggable terminals.
9. Supports periodic monitoring and communication-triggered monitoring.
2. Measures the voltage between positive and negative poles, as well as the grounding voltage of positive and negative poles.
3. Status indication via LED indicators.
4. Parameters settable via DIP switches.
5. 2-channel relay output, normally open / normally closed configurable via communication.
6. RS485 communication, Modbus-RTU protocol.
Supports periodic monitoring and communication-triggered monitoring.
7. Suitable for energy storage systems with DC voltage below 1500V.
AIM-D200-CAI
Designed for DC100V~1000V DC EV Charging Pile
2. Measures the voltage between positive and negative poles, as well as the grounding voltage of positive and negative poles.
3. LED indication for operation status and fault alarms.
4. Equipped with 1-channel DC current monitoring function.
5. RS485 communication, Modbus-RTU protocol.
6. 4-module DIN rail mounting with pluggable terminals.
7. Supports periodic monitoring and communication-triggered monitoring.
AIM-D100-CAD
Designed for DC 100V~1000V Dual-Gun DC EV charging
2. Measures the voltage between positive and negative poles, as well as the grounding voltage of positive and negative poles.
LED indication for operation, communication, pre-alarm, alarm and reverse polarity status.
3. Dual-channel independent monitoring and alarm.
4. Parameters configurable via DIP switches.
5. RS485 communication, Modbus-RTU protocol.
6. Supports periodic monitoring and communication-triggered monitoring.
