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漫赢娱乐:HM launched its first SF6 Gas Insulated Vacuum OLTC in 2014 with the world highest voltage level

Date: 2017-09-27
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Concerning the continuous increasing power consumption in urban areas, a great number of substations have been constructed underground, beneath commercial buildings, parks and public spaces. In this case, gas insulated transformers offer the best solution due to their outstanding non-flammability and insulating efficiency. As the most crucial part of transformers, gas Insulated vacuum OLTCs were born accordingly.

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Boasting a professional and experienced design team, HM launched its first SF6 Gas Insulated Vacuum OLTC (Type: SHGVIII) successfully in 2014 and became a leader ofGas Insulated Vacuum OLTCs with the highest voltage level.?


HM launched its first SF6 Gas Insulated Vacuum OLTC in 2014 with the world highest voltage level


Diverter Switch

l? Use Vacuum interrupter (EATON, USA) to extinguish arc.

l? The energy accumulation mechanism adopts the?“over-dead–point” release principle, and all moving parts are rolling friction.

l? Take the heat dissipation problem of transition resistance into consideration and reduce the transition resistance flow density.


Tap Selector

l? Use the mature overall structure of CMD selector.

l? All the contacts are designed as rolling structures.

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Advantages of HM SF6 Gas Insulated Vacuum OLTC

l? Non-flammability

l? Easy inspection and less maintenance work


HM launched its first SF6 Gas Insulated Vacuum OLTC in 2014 with the world highest voltage level?

Transformer SQFPZ11-63000/220±8*1.25%& SHGVIII-400Y/126C-10193G

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The?SF6 Gas Insulated Vacuum OLTC passes all ?type tests as below in accordance with the requirements of IEC-60214-1 tap-changer Part 1: performance requirements and test methods.

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1. OLTC functional test

2. OLTC Mechanical test

3. Contact temperature-rise test

4. Switching test

5. Short-circuit current test

6. Transition impedance test

7. Insulation test


On 21 July 2016, Power Grid Planning Research Center of Shenzhen Power Supply Bureau Co., Ltd issued a Statement to HM and certified the SF6 Gas Insulated Vacuum OLTC produced by HM operates very well at the 220V Yulv Substation in Qianhai, Shenzhen without any failure since commissioning.


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