ABB UniGear ZS1 - Page 109

109
Range of fuses
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7. Operation of the switchgear
Closing and opening of NALF switch-
disconnector:
• The switch-disconnector can only be
switched on if the earthing switch is open.
• Put operating lever 1 (Figure 180) in position
pointing up or down on the grooved shaft of
the switch-disconnector so that there is
sufficient room for movement of the
operating lever even if space is limited at
sides.
• Turn the lever clockwise through approx. 180°
to charge the opening spring.
• Turn the lever anti-clockwise to charge the
closing spring and to close the switch-
disconnector.
• Turn the lever clockwise through approx. 20°
to open the switch-disconnector.
• Observe switch positioning indicator.
Caution:
Until the latch of the opening or closing spring
actuates, the lever will be returned back into the
starting position through the spring action.
Proceed with caution during this operation to
prevent the slipping of lever from hand - RISK OF
INJURY.
Closing and opening of integrated earthing
switch:
• The earthing switch can only be switched on
if the switch-disconnector is open and
opening spring is charged.
• Put operating lever in position pointing left
or up on the grooved shaft of the earthing
switch 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. 90°
until the stop is reached to close the earthing
switch.
• Turn the lever anti-clockwise through approx.
90° until the stop is reached to open the
earthing switch.
• Observe switch positioning indicator.
Closing and opening of NALF switch-
disconnector with the motor operating
mechanism.
The switch-disconnector can also be equipped
with the UEMC 40 K3 motor operating
mechanism.
• Briefly operate the control buttons for
closing or opening. The switch-disconnector
is then switched automatically or the springs
of the switch-disconnector are charged.
Emergency manual operation
If a fault should occur in the motor operating
mechanism, the switch-disconnector can be
switched manually with the operating lever 1
(Figure 180) directly on the shaft of the switch-
disconnector.
Notice:
• After the manual operation the motor
operating mechanism will not be
synchronous with the switch-disconnector,
which means that it must be manipulated
twice to reach synchronization, e.g. opening
– closing.
• We recommend using a protective circuit-
breaker in the supply circuit of the motor
operating mechanism. The opening time of
mechanism A operated with motor operating
mechanism is approx. 1s. If faster opening is
required, it is necessary to equip the
mechanism A with an opening coil.
Caution:
The operating lever may only be fitted
temporarily to carry out an emergency manual
switching operation – RISK OF INJURY.