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Dowei Electric Horizontal Knee Disconnector GW11

Dowei Electric Horizontal Knee Disconnector GW11

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Dowei Electric Horizontal Knee Disconnector GW11

Product catalog summary

General Description:

The Horizontal Knee 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 copper and silver moving contacts, insulator double row ball bearings, and adjustable open and close position stops.

Typical Specification:

The disconnector is available in models GW11-126, GW11-145, GW11-252, and GW11-363, with rated voltages ranging from 126kV to 363kV.
Rated frequency for all models is 50 Hz.
Rated current varies from 2000A to 5000A depending on the model.
Rated short-time withstand current and duration are specified as 40/3 kA/s to 63/3 kA/s.
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 230+70 kV to 510+210 kV.
Rated lightning impulse withstand voltage to earth ranges from 550 kV to 1175 kV, and across breaks from 550+100 kV to 1175+295 kV.
Rated switching impulse withstand voltage is specified for the GW11-363 model as 950 kV to earth and 850+295 kV across breaks.
Switching capacitive current is 1A for most models, with the GW11-363 model at 2A.
Switching inductive current is 0.5A for most models, with the GW11-363 model at 1A.
Rated busbar transferring current is consistently 1600A across all models.

Catalog excerpts

Dowei Electric Horizontal Knee Disconnector GW11-1

Power Transmission & Distribution One stop equipments solution Horizontal Knee Disconnector

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Dowei Electric Horizontal Knee Disconnector GW11-2

Horizontal Knee Disconnector 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 • Copper and silver moving contact • Insulator double row ball bearings • Adjustable open and close position stops Horizontal Knee 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]...

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