R F And C E In "Chd" And "Cha" Mode (Chademo); R F And C Mode In "Dc" Modmode (Ccs); Fault Location R; System Leakage Capacitance C - Bender ISOMETER isoCHA425HV Manual

2.3.1 R and C in "CHd" and "CHA" mode (CHAdeMO)
F e
The insulation fault R
F
≥ 50 V. The maximum permissible system leakage capacitance C
the value R is determined by the smaller of the values R
F
determined from the voltages U
R is the two-pole insulation fault. It is only determined up to a maximum of 160 k . As soon as R
FS
160 k , it is thereafter evaluated up to max. 200 k .
The response time of the one-pole insulation fault R
values outside these ranges, the response time of R
In "CHA" mode, only the one-pole insulation fault R
2.3.2 R and C in "dc" mode (CCS)
F e
The insulation fault R
F
the system voltage. The maximum permissible system leakage capacitance is 20 F. The response time for R
10 s.
2.3.3

Fault location R%

From U > DC 20 V the fault location R% is calculated for insulation faults R
n
Value Meaning
–100 % one-pole insulation fault at L2/–
0 % symmetrical insulation fault
+100 % one-pole insulation fault at L1/+
For values of 30 % and more, the alarm assignment of the relays distinguishes between insulation faults at
L1/+ and L2/–.
From the values R% and R
• Fault at conductor DC+: R
• Fault at conductor DC–: R
2.3.4

System leakage capacitance C

The system leakage capacitance C
30 F, the message Device error "E.07" is displayed.
For applications according to UL 2231-1/-2, the system leakage capacitance C
2.3.5 System voltages U
The system voltage U
n
for overvoltage and undervoltage are available in the "A" menu; see "Setting the response values (AL)",
page 26. Above 1200 V, the message "Overvoltage" is displayed regardless of the set overvoltage limit
value.
The DC system voltages U
earth. No limit value is assigned to them.
and the system leakage capacitance C
and U
L1e L2e
up to 2 M and the system leakage capacitance C
the partial resistances R
F
= (200 % × R
F+ F
= (200 % × R ) / (100 % – R%)
F– F
is determined for insulation faults R
e
, U and U
n L1e
between terminals L1/+ and L2/– is measured as RMS value (True-RMS). Limit values
and U are respectively measured between terminals L1/+ as well as L2/– and
L1e L2e
are only determined for DC system voltages
e
is 1.6 F per conductor. In mode "CHd"
e
and R
FU FS
up to a maximum of 2 M .
is 1 s for limit values up to 100 k and U
FU
is max. 10 s.
F
is evaluated and not the two-pole isolation fault R
FU
and R can be calculated using the following formulas:
F+ F–
) / (100 % + R%)
e
L2e
isoCHA425HV_D00404_04_M_XXEN/10.2023
ISOMETER® isoCHA425HV
. R is the one-pole total insulation fault
FU
are determined independently of
e
up to 500 k ("CHd" mode 150 k ).
F
> 10 k up to a value of 35 F. Above
F
is limited to 10 F.
e
falls below
FS
≥ 100 V. For
n
.
FS
is
F
11