5
Monitoring, warning, error, repair
page 35
ELC X-Series-V1.3-09.16-GB
subject to technical alterations
5 Monitoring, warning, error, repair
5.1 Mains voltage monitoring
The mains voltage (L1, L2 of connector X100) is monitored during lamp operation.
In case of continuous input undervoltage the lamp power is reduced by the ELC
in order to prevent an overcurrent on the input side (see output power reduction
in chapter 6).
In case of mains voltage dropouts the ELC may stop lamp operation to prevent
damage of the inverter caused by undefined supply conditions.
5.2 Earth fault control
Supplementary to the safety functions of paragraph 3.3 which prevent danger to the operator,
the earth fault control of the ELC lamp circuit represents another monitoring function.
L
a
m
p
R
_
e
rr
o
r
Error Register
PROFIBUS-connection
Earth Fault Bit
Fig. 17: Earth fault monitoring
An earth fault occurs when the insulation resistance
R_
error
(see Fig. 17) drops below approx. 200 kOhm.
The ELC will shut down the lamp automatically in
case of an earth fault.
In order for the earth fault control to function properly
it is essential that it is connected as prescribed,
particularly the earth connectors.
An earth fault is reported by the
{Earth Leakage
Fault}
-bit in the
[Error Register]
(in normal
operation status the bit value is 0). Additionally the
display is blinking and shows the earth fault error
message.
Earth fault monitoring is also active if the lamp is not
running.
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