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Dowei Electric Indoor Vacuum Circuit Breaker (VCB) VN

Dowei Electric Indoor Vacuum Circuit Breaker (VCB) VN

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Dowei Electric Indoor Vacuum Circuit Breaker (VCB) VN

Product catalog summary

General Description:

The Indoor Vacuum Circuit Breaker (VCB) complies with standards such as IEC 62271, ANSI/IEEE Std C37, and NEMA, and holds certifications including ISO 9001, KEMA, CESI, CE, TUV, UL, and ASTA.
It features seismic design in accordance with ETGI-1.020, IEEE Std 693, and NCh2369, and structural design per ASTM A325, ANSI/AISC 360, and AWS D1.1.
High altitude correction is available up to 5000m as per IEC 62271 & IEEE C37.
The VCB includes a highly reliable vacuum interrupter embedded in the pole and a modular operating mechanism for enhanced mechanical life.
Options include fixed and withdrawable versions, as well as an accessory for a second trip coil.

Typical Specification:

The VCB is designed for indoor medium voltage AC applications with rated voltages of 7.2/12, 15/17.5/24, and 33/36/40.5 kV.
Rated current options range from 630 to 4000 A, depending on the voltage level.
It supports rated frequencies of 50/60 Hz and various insulation levels, including power frequency withstand voltage and lighting impulse withstand voltage (BIL).
The rated short circuit breaking current varies from 20 to 50 kA, with a short time withstand current of up to 50 kA for 4 seconds.
The VCB features a motor drive spring mechanism and supports operating sequences based on the short-circuit current level.
Mechanical endurance is rated at 20,000 operations, with auxiliary control voltages of AC220/110 and DC220/110 V.
Timing specifications include opening times of 20-60 ms, arcing times of 10-15 ms, full opening times of 30-65 ms, and closing times of 35-70 ms.

Catalog excerpts

Dowei Electric Indoor Vacuum Circuit Breaker (VCB) VN-1

Power Transmission & Distribution One stop equipments solution Indoor Vacuum Circuit Breaker (VCB)

Open the catalog to page 1

Dowei Electric Indoor Vacuum Circuit Breaker (VCB) VN-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 • Highly reliable vacuum interrupter embedded in the pole • Modular operating mechanism with higher mechanical life • Optional for fixed and withdrawable version • Optional accessory for 2nd Trip Coil Indoor Medium Voltage AC Vacuum Circuit Breaker Item Unit Data Rated voltage Rated current Rated frequency Rated insulation level...

Open the catalog to page 2

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