Interlocks - Siemens 8DJH Installation And Operating Instructions Manual
Medium-voltage switchgear
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Also See for 8DJH:
- Installation and operating instructions manual (174 pages) ,
- Operator's manual (2 pages) ,
- Operator's manual (2 pages)
Table of Contents
Description
Mechanical interlocks
Electrical interlocking
14/121
7.3
Interlocks
• Separate actuating openings for DISCONNECTING and EARTHING:
Switching straight from CLOSED to EARTHED position and from EARTHED to CLOSED
position is not possible, as the operating lever must be re-inserted in the OPEN position.
• Cable compartment interlock:
To remove the cable compartment cover, the feeder must be earthed.
• Locking device (option):
The locking device of the switching gate on the three-position disconnector and three-
position switch-disconnector can be padlocked in all three switch positions. The locking
device can be padlocked so that no closing, no opening or no earthing is possible. The
padlock can also be fitted in such a way that none of the three switching operations can be
performed.
• Closing lockout (option):
When the cable compartment cover is removed, the three-position disconnector / three-
position switch-disconnector cannot be switched to CLOSED position. Switching from
EARTHED to OPEN position is possible, e.g. to test the cables without removing the cable
plugs.
• De-earthing lockout (option):
When the cable compartment cover is removed, the three-position disconnector / three-
position switch-disconnector cannot be switched from EARTHED to OPEN position.
• Operating lever inserted:
When the operating lever is inserted, the stored-energy mechanism and the circuit-breaker
operating mechanism cannot be activated or deactivated.
• Interlocking between circuit-breaker and three-position disconnector:
- Circuit-breaker in OPEN position:
The three-position disconnector can be closed and opened. As soon as one of the actuating
openings of the three-position disconnector is opened, the circuit-breaker cannot be
operated anymore.
- Circuit-breaker in CLOSED position:
No switching operations are possible with the three-position disconnector.
Availability of the mechanical interlocks
Mechanical interlocking
Separate actuating openings
Cable compartment interlock
Locking device
Closing lockout
De-earthing lockout
Operating lever inserted
Interlocking between circuit-breaker and
three-position disconnector
X Available
O Option
On the customer's request, different electrical interlocks can be installed.
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • 500-8067.9
Panel type
R
T
L
K
X
X
X
–
X
X
X
–
O
X
X
–
O
–
O
–
–
X
O
–
–
X
X
–
–
–
X
–
– Not available
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