Siemens 8DJH - HV HRC Fuse Assembly

500-8067.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • Revision 05 15/121
Description
7.4 HV HRC fuse assembly
Features • With fuse slide for fuse replacement without tools
• HV HRC fuse-links according to DIN 43625 (main dimensions) with striker in "medium"
version according to IEC/EN 60282-1
- as short-circuit protection before transformers
- with selectivity to upstream and downstream connected equipment
- 1-pole insulated
• Dimension e of the fuse-links
-U
r
= 12 kV: e = 292 mm (optionally, e = 442 mm)
-U
r
= 24 kV: e = 442 mm
• Requirements according to IEC 62271-105 / VDE 0671-105 met for HV HRC fuse-links in
combination with the three-position switch-disconnector
• Thermal striker tripping when the corresponding HV HRC fuse-link is used
• Climate-independent and maintenance-free, with fuse boxes made of cast resin
• Arrangement of fuse assembly below the switchgear vessel
• Fuse assembly connected to the three-position switch-disconnector via welded-in bushings
and connecting bars
• Fuse replacement is only possible when the feeder is earthed
• Option for HV HRC fuse-links: "Tripped" indication for remote electrical indication with a
NO contact
Mode of operation If a HV HRC fuse-link operates, the switch is tripped via an articulation which is integrated into
the cover of the fuse box.
Thermal protection If the fuse tripping fails, the sudden overpressure trips the switch via a diaphragm and the
articulation situated in the cover of the fuse box.
The thermal protection works independently of the type and design of the HV HRC fuse-link
used. The thermal protection is maintenance-free and independent of any outside climatic
effects.
Fig. 9: HV HRC fuse assembly
①
Fuse box
②
Fuse slide
③
Tripping pin
④
Sealing cover with seal
⑤
Cap with control electrode
⑥
HV HRC fuse-link
⑦
Cable connection (bushing)
⑧
Switchgear vessel
⑨
Fuse bushing