Protection Tripping For The Three-Position Switch-Disconnector With Spring-Operated/Stored-Energy Mechanism - Siemens 8DJH Series Installation And Operating Instructions Manual

Padlock Down
Actuating opening Earthing switch
Possible switching Only EARTHING and DE-
operations EARTHING possible
Re-establishing readiness
for service
500-8067.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8DJH * Revision 03
Center
-
No switching operations
possible
16.2 Protection tripping for the three-position switch-disconnector with spring-operated/
stored-energy mechanism
NOTE!
If the opening spring of the transformer switch was tripped by a fuse-link:
The fuse indicator shows red.
The motor operating mechanism (option) is out of operation.
Earth the switching device.
If necessary, replace all fuse-links, otherwise it will not be possible to charge
the closing and opening springs, as the tripping command is still active through
the striker.
Up
Disconnector/switch-
disconnector
- Only CLOSING and
OPENING possible
- Only possible if the circuit-
breaker is open
Operation
Circuit-breaker/transformer
switch
- Charging the spring
105