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Dowei Electric Double Break Disconnector GW7

Dowei Electric Double Break Disconnector GW7

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Dowei Electric Double Break Disconnector GW7

Product catalog summary

General Description:

The Double Break Disconnector adheres to international standards such as IEC 62271, ANSI/IEEE Std C37, and NEMA.
It is certified by ISO 9001, KEMA, CESI, CE, TUV, UL, and ASTA.
Designed for seismic conditions according to ETGI-1.020, IEEE Std 693, and NCh2369.
Structural design follows ASTM A325, ANSI/AISC 360, and AWS D1.1 standards.
High altitude correction is applicable up to 5000 meters as per IEC 62271 & IEEE C37.
Features include a stationary cast aluminum contact base and copper and silver moving contacts, with a robust, seamless steel pipe base.

Typical Specification:

The disconnector is available in models GW7-126, GW7-145, GW7A-252, and GW7-363, with rated voltages ranging from 126kV to 363kV.
Rated frequency is 50/60 Hz across all models.
Rated current varies from 1250A to 5000A depending on the model.
Rated short-time withstand current and duration are 40/3 kA/s for lower models and up to 63/3 kA/s for higher models.
Rated peak withstand current ranges from 100 kA to 160 kA.
Rated short-time power frequency withstand voltage to earth ranges from 230 kV to 510 kV, and across breaks from 265 kV to 580 kV.
Rated lightning impulse withstand voltage to earth ranges from 550 kV to 1175 kV, and across breaks from 630 kV to 1175+205 kV.
Rated switching impulse withstand voltage is specified for the GW7-363 model, with 950 kV to earth and 850+295 kV across breaks.
Switching capacitive current is 1-2 A, and switching inductive current is 0.5-1 A depending on the model.
Rated busbar transferring current is specified for higher models, with 2000 A for GW7A-252 and 1600 A for GW7-363.

Catalog excerpts

Dowei Electric Double Break Disconnector GW7-1

Power Transmission & Distribution One stop equipments solution Double Break Disconnector

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Dowei Electric Double Break Disconnector GW7-2

General Description: • IEC 62271, ANSI/IEEE Std C37, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Seismic design, ETGI-1.020, IEEE Std 693, NCh2369 • Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1 • High altitude correction per IEC 62271 & IEEE C37, ~ 5000m • Stationary Cast Aluminum Contact Base • Copper and Silver Moving Contact • Robust, Seamless Steel Pipe Base Double Break Disconnector 126~363kV NINGBO DOWEI ELECTRIC CO., LTD. 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang, China. 315048 Tel: +86-15088801930 | [email protected] | www.dowei-electric.com

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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