High Precision DC/AC Floating System Insulation Monitor- Hospitality Enviro Tech

Overview

Hospitality Enviro Tech high precision DC/ACfloating system insulation monitor is used to monitor the insulation resistance of 0 Vdc to 1000 Vdc. DC floating system and 0 Vac to 750 Vac. AC floating system to ground in real time; measure the insulation fault of equipment shell to ground, high voltage to 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, insulation resistance can also be reliably monitored under strong interference or complex driving conditions, such as acceleration/deceleration, braking, and energy recovery. In the AC system, it can suppress the interference of voltage high-frequency harmonics and accurately measure the insulation resistance of the entire AC system to ground. 

 

Features 

• DC system: monitor the ground insulation status of 0 Vdc to 1000Vdc. DC floating system, and accurately measure the DC voltage  

• AC system: Monitor the ground insulation status of the entire system of the 0 Vac to 750 Vac. AC floating system, cannot select the line (that is, does not distinguish which phase of the line is faulty), and cannot measure the AC voltage  

• Passive equipment: monitor the insulation status between the equipment and the shell or between the equipment and the ground  

• When the bus voltage is 0, the insulation resistance of the system to ground can still be reliably monitored  

• Measuring range: 0 MΩ to 50 MΩ, when it exceeds 50 MΩ, the default output is 50 MΩ 

• Automatic adaptation system Y capacitor CY (CY≤4 μF)  

• Communication using CAN bus interface  

• Built-in high-voltage relay, which can disconnect the physical connection between the insulation monitor terminal (DC+/DC-) and the system under test  

• Class B voltage [1] (high voltage side) is isolated from class A voltage (low voltage side) withstanding voltage 3500 Vdc. / 2500 Vac.(rms)
  This product is suitable for: High voltage system of electric vehicle power battery, high voltage system of hybrid electric vehicle, high voltage system of hydrogen energy vehicle, energy storage system, other DC floating system, AC floating system, etc. 

 

Technical specifications

Insulation resistance output method	HETOET-238(A)  (recommended)	DC voltage within 0 Vd.c. to 1000 Vdc.	Output RISO
		AC voltage within 0 Vc. to 750 Vc.	Output RISO
	HETOET-238(B)	DC voltage within 20 Vdc. to 1 000 Vdc.	Output RISO+ and RISO–
		DC voltage within 0 Vdc. to 20 Vdc.	Output RISO+ and RISO– but mandatory RISO+ = RISO– = RISO+ // RISO– = RISO
DC system	0 Vdc to 1000 Vdc. ( tested by 1050 Vdc. in the laboratory)		DC voltage measurement accuracy 1 %  (laboratory measurement)
AC system	0 Vac to 750 Vac.		Cannot measure AC voltage
Power supply			9 Vdc to 36 Vdc.
input power			≤ 2 W (laboratory measurement)
Insulation resistance  measuring range			0 MΩ to 50 MΩ  Default output is 50 MΩ when it exceeds 50 MΩ
Insulation resistance  measurement accuracy [1]	0 kΩ  to 100 kΩ , C Y ≤ 2μ F , the bus voltage is stable		±12 kΩ (laboratory measurement)
	100 kΩ to 1 MΩ , C Y ≤ 2μ F , stable bus voltage		±10 % (laboratory measurement)
	1 MΩ to 50 MΩ , C Y = 0μF , the bus voltage is stable		±10 % (laboratory measurement)
Insulation resistance measurement response speed	R ISO ≥500 kΩ, C Y =0 μ F , the bus voltage is stable		4 s
	R ISO <500 kΩ , C Y =0 μ F , the bus voltage is stable		5 seconds
	R ISO =1 MΩ , C Y =1 μ F , the bus voltage is stable		8 s
	R ISO =1 MΩ , C Y =2 μ F , the bus voltage is stable		12 s
High voltage input internal resistance	When working with power on (internal high voltage relay is closed)		The positive and negative poles are 5.1 MΩ to ground respectively
	When power is off or not working (internal high voltage relay is disconnected)		Positive and negative poles to ground ＞500 MΩ
Injection pulse signal amplitude			±15V
Injection pulse signal frequency	It is related to the size of Y capacitor CY and the size of insulation resistance R ISO		adaptive
High and low voltage isolation withstand voltage			3500 Vd.c., 2 500 Va.c.(rms)
CAN and high voltage side isolation withstand voltage			3500 Vd.c., 2 500 Va.c.(rms)
Operating temperature			-40 °F to 185 °F (-40 °C to +85 °C)
storage temperature			-40 °F to 185 °F (-40 °C to + 85 °C)
degree of protection			IP55
weight			About  1.10 lb  (0.5 kg)