Switching The Three-Position Switch-Disconnector From Earthed To Open Position; Protection Tripping Of The Switch-Fuse Combination - Siemens 8DJH Installation And Operating Instructions Manual

9.5.4 Switching the three-position switch-disconnector from EARTHED to OPEN

9.5.5 Protection tripping of the switch-fuse combination

500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
position
☒ Three-position switch-disconnector in EARTHED position
1. Check service readiness [▶ Page 135, "Ready-for-service
indicator"].
2. Remove the padlock from the locking device (optional).
3. Push the locking device downwards, and hold it.
✓ The actuating opening of the earthing switch is open.
4. Insert the operating lever and turn straight counter-clockwise as
far as it will go.
✓ The position indicator of the earthing switch shows the OPEN
position.
5. Remove the operating lever.
✓ The locking device returns to its initial position.
6. Fit the padlock (optional) on the locking device at the desired
position [▶ Page 137, "Mechanical interlocking with padlock"].
✓ The feeder is de-earthed.
If the switch-fuse combination was tripped by a fuse-link, the "fuse tripped" indicator shows a
red transverse bar. Electrical switching commands to the motor operating mechanism (option)
are suppressed.
Fig. 180: "Fuse tripped" indicator
Re-establishing service readiness
1. Switch the switching device to EARTHED position.
✓ The "fuse tripped" indicator is reset to the "not tripped" condition.
2. Replace all HV HRC fuse-links [▶ Page 160, "Replacing HV HRC fuse-links"]. The fuse-links
may also be damaged if their striker was not tripped.
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