iTD uni-cart Instrucciones Para El Uso página 40

Electrical safety
3.6.2 Application requirements
3.6.3 Application requirements
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TD_JEST_15_GA_001 Rev.: 001
1 Power on control (green)
2 Signals exceeding dielectric resistance (yellow)
3 Signals exceeding temperature (yellow)
4 Reset-button for fault release
5 Test-button starting self-test function manually
The earth-leakage-guard monitors the dielectric resistance for equipment (where safety isolation
is necessary) which are connected to the isolation transformers. Simultaneously, the temperature
of the transformer is evaluated by a built-in thermal switch which responds when triggered. The
evaluation procedure is processor controlled.
Turn the main power switch of the isolating transformer to "ON". Within 5 s the self-test of the
ELG is automatically activated.
After the self-test of the ELG is concluded, the green LED (Power on control) glows permanently.
During operation this test is repeated (automatically) in a time cycle of 8 hours. This self-test may
also be activated manually through the test-button.
The control procedure for the manual self-test is as follows:
• An insulation error is simulated, the yellow LED (signals exceeding dielectric resistance) glows,
a warn signal (2.4 kHz) is activated. Both signals stop after approx. 5 s.
• Following this, a temperature error is simulated. The yellow LED (signals exceeding
temperature) glows, a warn signal (2.4 kHz pulse tone) is activated. Both signals stop after
approx. 5 s.
An error situation is recognized as follows:
• In case of an insulation error, the yellow LED (signals exceeding dielectric resistance) glows
permanently, the warn signal with 2.4 kHz is activated permanently. The warn signal can be
deactivated through the reset-button for fault release. The LED glows until the error is
eliminated.
• If the earth-leakage-guard is turned "OFF" in the meantime and the error is not eliminated,
when turning the ELG back "ON" the above described procedure begins anew.
With the occurrence of an isolation error the acoustic and optical alarm stays activated (even
if the isolation error is corrected on its own) until deactivated through the fault release:
First activation of the fault release: acoustic alarm is deactivated
Second activation of the fault release: optical alarm is deactivated
Erstellt am/durch: 07.04.2015/ITD
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Freigabe am/durch: 07.04.2015/ETI
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