Function; Intended Use; Device Features - Bender ISOMETER isoCHA425HV Manual

2

Function

2.1

Intended use

The ISOMETER® isoCHA425HV in combination with the coupling device AGH420-1 monitors the insula-
tion resistance R for DC fast charging stations according to CHAdeMO standard or according to
F
Combined Charging System (CCS) for nominal system voltage ranges between DC 0 V and 1000 V.
In order to meet the requirements of applicable standards, customised parameter settings must be
made on the equipment to adapt it to local equipment and operating conditions.
Please heed the limits of the area of application indicated in the technical data. Any use other than that
described in this manual is regarded as improper.
i
To ensure that the ISOMETER® functions correctly, an internal system resistance of ≤ 1 kΩ must exist
between L1/+ and L2/- via the source or the load.
2.2

Device features

• Monitoring of the insulation resistance R
standard or Combined Charging System (CCS) in the system voltage range up to 1000 V
• CHAdeMO (Mode
– Detection of insulation faults in the system voltage range 50 V to 1000 V, single-pole insulation
faults R
FU
– Two-pole, symmetrical insulation faults R
time of 10 s
– Maximum system leakage capacitance 1.6 μF per conductor
• CCS (dc mode):
– Detection of insulation faults up to 2 M
– Maximum system leakage capacitance 5 μF
• Measurement of the system leakage capacitance C
• Measurement of the nominal system voltage U
detection
• Measurement of the residual voltages U
and earth)
• DC residual voltage
• 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 output 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 separated) including the following protocols:
– BMS interface (Bender measuring device interface) for data exchange with other Bender compo-
nents
– Modbus RTU
– IsoData (for continuous data output)
• Password protection to prevent unauthorised parameter changes
• Stop mode to deactivate the measuring pulse generator
CHd):
up to 100 kΩ with a response time of 1 s and up to 2 MΩ with a response time of 10 s
ISOMETER® isoCHA425HV with AGH420-1
of DC charging stations according to CHAdeMO
F
up to a maximum of 160 kΩ and with a response
FS
Ω
with a response time of 10 s
e
(True RMS) with undervoltage/overvoltage
n
(between L1/+ and earth) and U
L1e
isoCHA425HV_D00404_00_M_XXEN / 10.2020
(between L2/-
L2e
7