JY1000-EV series insulation monitoring device is used to monitor the insulation resistance of 0~1000Vd.c. DC floating system and 0~750Va.c. AC floating system to ground in real time; measure the insulation fault of equipment shell to ground, high voltage to the shell, etc.
In the DC system, the insulation resistance of the positive pole and the negative pole of the DC system to the ground can be independently measured. In specific electric vehicle applications, CAN bus DC insulation monitor can also be reliably monitored under strong interference or complex driving conditions, such as acceleration/deceleration, braking, and energy recovery.
In the AC system, an Electric Vehicle DC insulation monitor can suppress the interference of voltage high-frequency harmonics, and accurately measure the insulation resistance of the entire AC system to the ground.



* DC system: monitor the ground insulation of the 0~1000Vd.c. DC floating system
* Passive equipment: monitor the insulation status between the equipment and the housing or between the equipment and the ground
* When the bus voltage is 0, the insulation resistance of the system to the ground can still be reliably monitored
* Measuring range 0~50 MΩ, when it exceeds 50 MΩ, the default output is 50 MΩ
* Automatic adaptation system Y capacitor CY (CY≤4 μF)
* CAN bus interface
* Built-in high-voltage relay can disconnect the physical connection between the terminal (DC+/DC-) of the insulation monitor and the system under test
Parameter | Condition | Typical value | |
Insulation resistance output mode | JY1000-EV -10D36CAx-x insulation monitor | Bus voltage 20~1000 Vd.c. | output RISO+ and RISO |
Bus voltage 0 ~ 20 Vd.c. | Compulsory RISO+ = RISO- = RISO | ||
JY1000-EV -10M36CAx-x insulation monitor | Bus voltage 0 ~ 1 000 Vd.c. | output RISO | |
Bus voltage measurement range | 0 ~ 1 000 Vd.c. | ||
Bus voltage measurement accuracy | 1% | ||
The power supply range of auxiliary power supply | 9 ~ 36 Vd.c. | ||
Input power | ≤ 2W | ||
Insulation resistance measurement range | 0 ~ 50 MΩ | ||
Insulation resistance measurement accuracy | 0~ 100 kΩ, CY≤ 2μF, Bus voltage stability | ±12 kΩ | |
100 kΩ~1 MΩ,CY≤ 2μF, Bus voltage stability | ±10 % | ||
1 MΩ~50 MΩ, CY =0μF, Bus voltage stability | ±10 % | ||
Insulation resistance measurement response time | RISO≥ 500 kΩ, CY =0μF, Bus voltage stability | 4 s | |
RISO<500 kΩ, CY =0μF, Bus voltage stability | 5 s | ||
RISO=1 MΩ, CY =1μF, Bus voltage stability | 8 s | ||
RISO=1 MΩ, CY =2μF, Bus voltage stability | 12 s | ||
DC equivalent internal resistance | Power on | 10.2 MΩ | |
Amplitude of injection pulse signal | ±15 V | ||
Injection pulse signal frequency | It is related to the size of the Y capacitor and insulation resistance . | self-adaption | |
High to low-voltage withstanding voltage | 3 500 Vd.c. 2 500 Va.c.(rms) | ||
CAN to high-voltage withstanding voltage | 3 500 Vd.c. 2 500 Va.c.(rms) | ||
Working temperature | -40 ºC ~+ 85 ºC | ||
Storage temperature | -40 ºC ~+ 85 ºC | ||
Protection level | IP55 |
Classification of voltage | Serial / line color | name | The wiring instructions |
B step voltage(high-pressure side) | V red | DC+ | Positive electrode BUS + of tested DC system |
I black | DC- | Connectested DC system negative BUS- | |
A step voltage(low-pressure side) | Citrus sinensis | H | Connect to the CAN bus H port |
hispid arthraxon | L | Connect to the CAN bus L port | |
palm | E | Connecting to the earth (vehicle chassis) | |
blue | A | Alarm output terminal (suspended if unnecessary) | |
black | V- | Connect to the auxiliary power supply anode | |
red | V+ | Connect to the positive electrode of the auxiliary power supply supply |
* Hybrid electric vehicle high voltage system
* Hydrogen energy vehicle high voltage system
* Energy storage system
* Other DC floating system and AC floating system

Related Insulation Monitoring Device for EV chargers and other application

Why choose our IMD for your application?
1. comperehensive IMD solutions for different application
There are serveral types of inuslation monitoring devices so you can have multiple choices to find your best IMD solutions.
2. OEM &ODM Service for your special needs
We have specialized in designing and manufacturing insulation monitoring devices for over 10 years. Just provide your needs such as logo and function design, and we can professionally design and manufacture your insulation monitoring device quickly.
3. High-Quality Guaranteed
We strictly select materials, inspect the manufacturing process, and check the product quality, to make our GYID meet the IEC, CE, and ROHS standards. The qualification rate of our insulation monitoring products can reach 99.9%.
Our capabilities include manufacturing and designing power and energy meter solutions. We also can manufacture a variety of protection relays such as motor protection relays, arc flash relays, DC insulation monitoring relays, current transformers, hall effect sensors, and much more. We can manufacture power and energy meters according to your design. We also can design circuits, functions, UI, and packaging, and manufacture the final products as per your requirements.




Yes, the EV Insulation Monitoring Device (IMD) supports CAN communication as a standard feature. We also offer models with optional Modbus TCP/IP and RS-485 interfaces for seamless integration with various vehicle control systems and data acquisition platforms.
2. Can it monitor the insulation status in real time?
Absolutely. The EV IMD is designed for real-time monitoring. It provides continuous, high-speed insulation resistance measurements and delivers instant alerts upon detecting any insulation degradation or fault conditions. This allows for immediate action to prevent potential hazards.
3. Can it adapt to electric vehicles with different voltage levels?
Yes, our IMD is highly adaptable. We offer models that support a wide range of voltage levels, from low-voltage auxiliary systems to high-voltage battery packs. Please specify your voltage requirements, and we will recommend the appropriate IMD model.
4. What types of electric vehicles are it suitable for?
It is suitable for a diverse range of electric vehicles, including:
Passenger EVs (battery electric vehicles)
Commercial EVs (buses, trucks, delivery vans)
Hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs)
Electric construction and agricultural equipment
Electric motorcycles and scooters
5. Has it passed the relevant certification?
Yes, IEC and CE are approved.
6. Can the use of this device improve the safety of electric vehicles?
Yes, absolutely. Providing early detection of insulation faults, preventing electrical hazards.