Function
15
2.7 Values outside the permissible measuring range
Fig. 2.6: Behaviour of the outputs when the values are outside the measuring range
If the residual current exceeds the measuring range (residual current
≥
20 mA), the residual current
monitoring module will disable the open collector output X12 (HIGH) after time T1 has elapsed. The
disconnection time is dependent on the value of the residual current (see chapter 2.8).
If the residual current monitoring module detects values outside the measuring range, the analogue
output X1 will be set to 4.85 V. As soon as the residual current falls below 10 mA, the output X1 will
remain at 4.85 V for approx. 1.2 s before the currently measured value will be displayed. In this way,
the shutdown can be reliably evaluated by the charging control electronics.
2.8 Measuring range and switching times
Measuring range
The measuring range of the residual current is 0…20 mA according to UL 2231 type CCID-20.
Switching time residual current monitoring module (without switching device)
The maximum switching times of the output X12 is dependent on the residual current.
For UL application:
Make sure that the maximum switching times are at least 10 ms below the maximum disconnection
times required by UL 2231.
Residual current
I
Δ
n
Switching output X12
Voltage output X1
4.85 V
20 mA
T2 = 1.2 s
~~
0.15 V
~~
~~
T1
Connecting residual current
I
Δ
n
≥ 20 mA
HIGH
LOW
T1: Switch-off time (X12)
depending upon the residual current
according to UL2231-2 minus 10 ms
(tripping time of the circuit-breaker)
T1 ≤
( )
I
Δ
n
20
1,43
- 10 ms
