Function
16
RCMB103_D00044_00_M_XXEN/08.2013
2.8 Measuring range and switching times
Measuring range
The measuring range of the residual current is 0…6 mA DC according to IEC62752, tab. 2b.
Switching time residual current monitoring module (without switching device)
The maximum switching times of the output X12 is dependent on the residual current.
2.9 Fault detection and the resulting technical reactions
Residual current
I
Δ
n
Switching time T1 of the output X12
480 ms
Type of fault
Detection
Response
Wire break in the
residual current transformer
Frequency measurement of the
measuring oscillator
X1 = 5.0 V
X12 = HIGH
Short-circuit in the residual cur-
rent transformer winding
Frequency measurement of the
measuring oscillator
X1 = 5.0 V
X12 = HIGH
Constant output voltage at the
measuring oscillator
Frequency measurement of the
measuring oscillator
X1 = 5.0 V
X12 = HIGH
Failure main oscillator
Reset by internal watchdog
X1 = 5.0 V or X1 = 0 V
X12 = HIGH
Supply voltage failure
Monitoring module connects and discon-
nects residual current monitoring
X1 = 5.0 V or X1 = 0 V
X12 = HIGH
Open collector output
constantly at LOW level
Self test to check whether output X12
switches to HIGH for 4.6 s when supply
voltage is connected; for details about
time T4 refer to page 12
Charging control electronics
detects fault after connecting to
the supply voltage
Analogue output X1 constantly
at LOW level
Output voltage outside the permissible
voltage range
Disconnection by charging con-
trol electronics
Storage cell of the computer
system defective
Detection by memory self test
X1 = 5.0 V
X12 = HIGH
Loss of return addresses from
subprograms
Response of internal watchdog
X1 = 5.0 V
X12 = HIGH
