Electrical Connection Of The Prime Conductor - Siemens 3AH37 Operating Instructions Manual

Undervoltage release (Y7)
present?
Fig. 63 Removing the cover
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2013-07-08
Removing the transport securing device from the undervoltage release
The vacuum circuit-breaker with an undervoltage release (Y7) 3AX1103 is supplied
with a transport securing device.
• Remove the two top screws (60.2) from the cover (60.1).
• Undo the two bottom screws (60.2) on the cover (60.1) until the cover (60.1) can
be taken off.
• Slightly tilt the cover (60.1) of the mechanism box and lift off.
• Shift the locking screw of the striker from position A to B (see reference note in
mechanism box [60.] of the vacuum circuit-breaker).
• Replace the cover (60.1) in the reverse order
• and fasten the screws (60.2) with a tightening torque of 10 Nm.

Electrical connection of the prime conductor

DANGER
High-voltage - danger to life
Test the vacuum circuit-breaker in the switchbay with high-voltage applied only
after faultless functioning has been ascertained (see "Commissioning" on
page 51).
Note
Grease the busbars with contact grease prior to mounting.
The busbars can be purchased from the Siemens Service Center.
Busbar connection
Adjust the busbars in such a way that, before fastening, they lie flat easily and fit the
holes on the contact areas of the vacuum circuit-breaker.
Fig. 64 Removing the transport securing device
Installation
A
B
47