Siemens 3AH37, Operating Instructions Manual, Page: 47 / 64

Installation
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2013-07-08
Removing the transport securing device from the undervoltage release
Undervoltage release (Y7)
present?
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
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. 63 Removing the cover Fig. 64 Removing the transport securing device
A
B
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.