Example of operation of ES in UniGear ZS1 panel
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01
8 DISTRIBUTION SOLUTION EK6 – MEDIUM VOLTAGE EARTHING SWITCH 12…40,5 KV – 25–50 KA
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Operation of the Earth Switch
in UniGear switchgear panel
An earthing switch allocated to a circuit-breaker
is only enabled for switching when withdrawable
circuit-breaker is in the test / disconnected
position or removed from the switchgear panel.
Operate earthing switch on only when the doors
are closed.
Manual opening and closing
Manually operated earthing switch. Always oper-
ate earthing switches by turning the lever until
the final position is reached. Press slide 2
(Figure 1) downwards onto the operating lever
recess socket. (When the switch is closed,
slide remains in this position!)
—
01 Preparation for
operation of branch
earthing switch – press
the slide downwards.
1 Hexagonal shaft
of ES operating
mechanism / 2 Slide
—
02 Preparation for oper-
ation of branch earthing
switch – operating lever
prepared for switching
on/off. 1 Operating lever
1
1
—
02
1
2
OFF ON
Caution
If the operation is prevented, do not force the
interlock and check that the operation sequence
is correct. Fit operating lever 1 (Figure 2) onto
hexagonal shaft 2 (Figure 1),which is now released
for operation.
Note
Position operating lever 1 (Figure 2) to point up
or down on the hexagonal shaft so that there is
sufficient room for movement of the operating
lever even if space is limited at the sides.
• Turn the lever clockwise through approx.
180° until the stop is reached to close
the earthing switch, or anti-clockwise until
the stop is reached to open the earthing switch.
• Observe the mechanical/electrical switch
position indicator.
• Remove operating lever 1. Slide 2 (Figure 1)
remains open if the earthing switch is in the
closed position. Make sure that the operating
lever is turned right up to the stop in the open-
ing process, to ensure that the earthing switch
is in its defined limit position. The manual oper-
ating mechanism can also be fitted with a lock-
ing magnet.
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