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

2

Function

2.1

Intended use

The ISOMETER® isoCHA425HV in combination with the AGH420-1/AGH421-1 coupling device monitors the
insulation resistance R
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.
To ensure that the ISOMETER® functions correctly, an internal resistance of ≤ 1 k must exist between L1/+
and L2/– via the source (e.g. PSU) or the load.
If the ISOMETER® is installed inside a control cabinet, the insulation fault message must be audible and/or
visible to attract attention.
2.2

Device features

• Monitoring of the insulation resistance R
standard or Combined Charging System (CCS)
• CHAdeMO (Mode CHd and CHA):
– Maximum system leakage capacitance 1.6 F per conductor
– Detection of insulation faults in the system voltage range from 50 V to 1000 V
– Response time for one-pole insulation faults R
• R ≤ 100 k : max. 1 s
FU
• 100 k < R ≤ 2 M : max. 10 s
FU
– Response time for two-pole insulation faults R
• R ≤ 160 k : max. 10 s
FS
• R > 160 k (200 k ): no detection (deactivation)
FS
• CCS (Mode dc):
– Detection of insulation faults up to 2 M
– Maximum system leakage capacitance C
– Response time t
an
• Measuring the system leakage capacitance C
• Measuring the system voltage U
• Measuring the DC residual voltages U
• Selectable start-up delay, response delay and delay on release
• Two separately adjustable response value ranges from 5...600 k (prewarning, alarm)
• Alarm output via LEDs ("AL1", "AL2"), 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 multi-functional LC display
for DC fast charging stations according to the CHAdeMO standard or according to the
F
F
at C ≤ 5 F or R ≤ 100 k : max. 10 s
e F
(True-RMS) with undervoltage/overvoltage detection
n
(L1/+ to PE) and U
L1e
of DC charging stations in accordance with the CHAdeMO
:
FU
(Mode CHd only):
FS
: 20 F
e
e
(L2/– to PE)
L2e
isoCHA425HV_D00404_04_M_XXEN/10.2023
ISOMETER® isoCHA425HV
9