Components; Three-Position Switch-Disconnector - Siemens 8DJH Installation And Operating Instructions Manual

Features
Spring-operated
mechanism
500-8067.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • Revision 05
7

Components

7.1

Three-position switch-disconnector

• Three-position switch-disconnector for rated voltages from 7.2 kV to 24 kV
• Switching functions as switch-disconnector (class E3) according to
IEC/EN 62271-103 / VDE 0671-103, IEC/EN 62271-102 / VDE 0671-102 and
IEC/EN 62271-105 / VDE 0671-105
• Designed with the functions of a switch-disconnector and a make-proof earthing switch
• Switch positions CLOSED, OPEN and EARTHED
• With the switch-fuse combination, the HV HRC fuse box can be earthed from both sides
(standard).
The spring-operated mechanism is used for the three-position switch-disconnector in
ring-main panels (as ring-main switch). The switching movements are performed
independently of the operating speed.
Fig. 6: Front operating mechanism box of ring-main
panel
Description
① Ready-for-service indicator
② ON/OFF momentary-contact rotary
control switch for motor operating
mechanism, switch-disconnector
(option)
③
Local-remote switch (option)
④ Auxiliary switch (option)
⑤ Control gate/locking device
⑥ Motor operating mechanism (option)
⑦ Sockets for capacitive voltage
detecting system
⑧ Actuating opening for EARTHING
⑨
Position indicator for three-position
switch-disconnector
⑩
Actuating opening for CLOSING/
OPENING
⑪ Retainer for short-circuit indicator /
earth-fault indicator and voltage
detecting system
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