ISOMETER® isoCHA425HV with AGH420-1/AGH421-1

Switchable between CCS (Combined Charging System) and CHAdeMO
Nominal voltages up to DC 1000 V
Detection of symmetrical and asymmetrical insulation faults
Electrically isolated Modbus RTU interface
Display of the fault location (DC+/DC/balanced)

The ISOMETER® isoCHA425HV in combination with the AGH420-1/AGH421-1 coupling device monitors the insulation resistance R_F for DC fast charging stations according to the CHAdeMO standard or according to the Combined Charging System (CCS) for nominal system voltage ranges between DC 0 V and 1000 V.

In order to meet the requirements of the applicable standards, customised parameter settings must be made on the equipment in order to adapt it to local equipment and operating conditions. Please heed the limits of the range of application indicated in the technical data.

Any other use or a use that goes beyond this constitutes improper use.

Questions? Contact us!

Switchable between CCS (Combined Charging System) and CHAdeMO
Nominal voltages up to DC 1000 V
Detection of symmetrical and asymmetrical insulation faults
Electrically isolated Modbus RTU interface
Display of the fault location (DC+/DC/balanced)

The ISOMETER® isoCHA425HV in combination with the AGH420-1/AGH421-1 coupling device monitors the insulation resistance R_F for DC fast charging stations according to the CHAdeMO standard or according to the Combined Charging System (CCS) for nominal system voltage ranges between DC 0 V and 1000 V.

In order to meet the requirements of the applicable standards, customised parameter settings must be made on the equipment in order to adapt it to local equipment and operating conditions. Please heed the limits of the range of application indicated in the technical data.

Any other use or a use that goes beyond this constitutes improper use.

Questions? Contact us!

Features

Monitoring of the insulation resistance R_F of DC charging stations according to CHAdeMO standard or Combined Charging System (CCS)
CHAdeMO (Mode CHd and CHA):
– Maximum system leakage capacitance 1.6 μF per conductor
– Detection of insulation faults in the system voltage range 50 V to 1000 V
– One-pole insulation faults R_FU: R_FU≤ 100 kΩ: Response time ≤ 1 s, 100 kΩ < R_FU≤ 2 MΩ: Response time ≤ 10 s – Two-pole insulation faults R_FS: R_FS ≤ 160 kΩ: Response time ≤ 10 s, R_FS > 160 kΩ (200 kΩ): no detection (Deactivation) (only CHd)
CCS (Mode dc):
– Detection of insulation faults up to 2 MΩ
– Maximum system leakage capacitance C_e: 20 μF
– Response time t_an at C_e ≤ 5 μF or R_F ≤ 100 kΩ: ≤ 10 s
Measurement of the system leakage capacitance C_e
Measurement of the nominal system voltage U_n (True RMS) with undervoltage/overvoltage detection
Measurement of the DC residual voltages U_L1e (between L1/+ and earth) as well as U_L2e (between L2/- and earth)

Selectable start-up delay, response delay and delay on release
Two separately adjustable response value ranges of 5...600 kΩ (Alarm 1, Alarm 2)
Alarm signalling via LEDs (“AL1”, “AL2”), a display and alarm relays (“K1”, “K2”)
Automatic device self test with connection monitoring
Selectable N/C or N/O relay operation
Measured value indication via a multifunctional LC display
Fault memory can be activated
RS-485 (galvanically isolated) including the following protocols:
– BMS interface (Bender measuring device interface) for data exchange with other
Bender components
– Modbus RTU
– IsoData (for continuous data output)
Password protection to prevent unauthorised parameter changes
Stop mode for disabling the measuring pulse generator and in combination with AGH421-1 disconnection from the monitored system.

Applications

DC charging stations for electric vehicles in accordance with the Japanese charging standard CHAdeMO
DC charging stations for electric vehicles according to CCS (Combined Charging System) in compliance with IEC 61851-23