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46
U N I G E A R Z S 2 I N S TA L L AT I O N , O P E R AT I O N A N D M A I N TA I N A N C E I N S T R U C T I O N M A N U A L
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Figure 60 - Earth switch in open position
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Figure 61 - Earth Switch in Closed position
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Figure 62 - Earth switch link mounted on insulator
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Figure 63 - Earth switch-EK6 type
Closing the earthing switch:
Ensure that the circuit breaker is in test or
withdrawn position. Open the lever entrance by
turning 90º the handle anti- clockwise. This will
not be possible if:
•
the CB is in service position
•
key locked for Earth switch at open position.
Do not force. Insert operating lever. Assure
that the circuit to be earthed has no voltage.
Turn the lever clockwise 180º to close the
earthing switch.
This will not be possible if:
•
electrical interlocking of ES position is on.
Do not force. Remove the operating lever,
the lever entrance is open. See the closed
(Earthed) position of Earth switch on indicator
from the lower inspection window. Key-lock if
necessary the Earth switch in closed position.
CAUTION!
Earthing switch must not be
attempted for operation when it is
possible that personnel may be in the
cubicle. If the operation is prevented,
do not force the interlock and check
that the operation sequence is correct.
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Figure 64 - Front view with operating handle inserted
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