26
MOUNTING AND OPERATION MANUAL INDOOR AIR SWITCH-DISCONNECTOR, NAL/NALF/VR
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11.0 Hand operating mechanism
NEMD
11.1 Application
The reciprocating drive is intended for operating
indoor switch-disconnectors type NAL and E / EB
earthing switches. The operation can be
performed manually by operating the
maneuvering lever in a reciprocating movement.
It is designed for mounting on the front of the
panel in tower type switchgears (drive installation
below the level of the apparatus).
It is possible to use a mechanical lock, which
increases the safety of the operator (locking of
the drive is performed by installing padlock that
prevents inserting the maneuvering lever and
blocking the position of the front lever. Please
specify the type of apparatus (NAL / F switch or
E, EB earthing switch) to which the drive is
required when placing order.
11.2 Rated data
• Fitter's lock with a padlock
• MAX 90
o
manoeuvring angle of rotation
• Mechanical performance of 2000 operations
• Hand operating mechanism (for NAL) -
1YMX888739M0001 (operating angle 10-35
o
measured from level),
• Hand operating mechanism (E, EB) -
1YMX888739M0002 (operating angle 10-30
o
measured from vertical)
11.3 Working conditions
The NEMD type drive is designed for operation in
indoor switchgears in normal service conditions
with:
• ambient temperature (-5
o
C + 40
o
C),
• maximum relative air humidity 95%
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34 Hand operating mechanism NEMD arrangement
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