Installation
page 20
ELC N12-N32_NE12-NE32_NE12D-NE32D-V1.0-03.17-GB
Subject to technical alterations
3.4.5 Earth fault control
The ELC (electronic ballast) has been fitted with an earth fault control system.
The ELC is fitted with an earth fault relay
ES
for the purpose of indicating an earth fault. During
trouble-free operation the relay is closed (provided the ELC is connected to the power supply
voltage).
The earth fault control is also active when the lamp is switched off.
The lamp should not be switched on if the relay ES is open.
Series N12-N32 und NE12-NE32
Series NE12D-NE32D
In the case of an earth fault through the isolating resistor
R_error
(see Fig. 11)
the relay
ES
opens .
The error is
only displayed
, the ELC
does not switch off the lamp. The error
is also not stored by the ELC.
If an earth fault occurs during lamp
operation the ballast must be switched
off immediately and the error must be
corrected. The lamp must not be
started when an earth fault has
occurred.
The ELC
turns off
the lamp. The error
is stored in the error memory of the
ELC.
If an earth fault occurs during lamp
operation, the lamp is switched off by
the ELC. In the event of an earth fault,
the lamp can not be ignited.
In order for the earth fault control to function properly it is essential that the ELC
is connected as prescribed, particularly the earth connectors.
The relay contact ES (pins 8 and 13 on the control connector) opens when the
isolation resistance R_error is below approx. 200 k
Ω
.
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