Siemens 8DJH-36 36kV Ring Main Unit shown with ring switch, fused panel and circuit breaker
Back in July 2017, we took to the road seeing customers between Kaitaia and Invercargill with a 36kV 8DJH. That panel showed a circuit breaker and ring switch. We are doing this again in September but this time with a special demo unit with circuit breaker, fused switch and ring switch. The demo unit is cut open at front and back allowing customers to see the internal switching mechanisms of all panels.
In comparison to primary 1000 A rated equipment, the 8DJH-36 is a highly cost-effective range which now includes several predefined, lower cost, single SF6 gas block configurations. These include the versatility to allow future extensions of panels to the left or right-hand side.
The 8DJH-36 is rated 36 kV (20 kA 3 sec) with a bus current rating of 630 A. The range includes:
- Ring switches
- Cable to bus panels
- Transformer fused T-offs
- Circuit breakers
- Air-insulated billing/metering panels – arc rated (with option for cable connection left, right or both)
- Bus section
- Ability for VTs to be mounted in the switchgear panel (a special extra panel for VT’s is not required)
- Automation for remote control – including earth switches if desired
The 8DJH-36 is being used for outdoor-to-indoor conversion of 33 kV switching stations locally in New Zealand, and for mobile substations. For many of New Zealand’s smaller substations, where a 630 A rating is sufficient, 8DJH-36 offers considerable savings in capital cost compared to traditional primary switchgear.
An outdoor enclosure option provides even more possibilities for the 8DJH-36 to be used in outdoor substation refurbishments. See the Siemens website for further 8DJH-36 information.