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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36

Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36

Product catalog summary

Overview: The document provides detailed specifications and descriptions of Air Insulated Medium Voltage (MV) Switchgear offered by Ningbo Dowei Electric Co., Ltd. It covers three voltage levels: 12kV, 24kV, and 36kV, highlighting their compliance with international standards, design features, and technical specifications.

General Description: The switchgear is designed according to IEC 62271, ANSI/IEEE Std C37, and NEMA standards. It is certified by ISO 9001, KEMA, CESI, CE, TUV, UL, and ASTA. The design includes seismic considerations and structural integrity per ASTM and ANSI standards. It is suitable for high altitudes up to 5000m and features a modular, robust design that is SF6-free, using vacuum circuit breakers for safety and reliability.

Specifications for 12kV Switchgear:

Rated voltage: 12kV
Lightning impulse withstand voltage: 75kV
Power frequency withstand voltage: 42kV
Rated frequency: 50/60Hz
Internal arc class: AFLR 50kA/1s
Busbar system rated normal current: up to 5000A (fan cooled)
Circuit breaker ratings: short-circuit breaking current up to 50kA
Installation: Indoor, with temperature range -15 to +40°C

Specifications for 24kV Switchgear:

Rated voltage: 24kV
Lightning impulse withstand voltage: 125kV
Power frequency withstand voltage: 50kV
Internal arc class: AFLR 31.5kA/1s
Busbar system rated normal current: up to 4000A (fan cooled)
Circuit breaker ratings: short-circuit breaking current up to 40kA

Specifications for 36kV Switchgear:

Rated voltage: 36/38kV
Lightning impulse withstand voltage: 170kV
Power frequency withstand voltage: 70kV
Internal arc class: AFLR 31.5kA/1s
Busbar system rated normal current: up to 3150A (fan cooled)
Circuit breaker ratings: short-circuit breaking current up to 40kA

Common Features: All models feature interlock-controlled circuit breaker compartments, tool-based or non-accessible busbar compartments, and tool-based or interlock-controlled cable compartments. They have an external protection degree of IP4X and internal protection of IP2X. The auxiliary voltage options are AC110/220 and DC110/220, with a mechanism rated for over 20,000 operations.

Catalog excerpts

Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-1

Power Transmission & Distribution One stop equipments solution

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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-2

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 • Modular and Robust design for low maintenance and critical power application • SF6 free switchgear, vacuum circuit breaker for safe, compact and reliable solutions Rated voltage Lightning impulse withstand voltage (BIL) Power frequency withstand voltage (1 min) Rated frequency Internal arc class Loss of service continuity category...

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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-3

Auxiliary voltage Mechanism Rated operating sequence Number of operations interrupter 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.co

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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-4

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 • Modular and Robust design for low maintenance and critical power application • SF6 free switchgear, vacuum circuit breaker for safe, compact and reliable solutions General rating Rated voltage 24kV Lightning impulse withstand voltage (BIL) 125kV Power frequency withstand voltage (1 min) 50kV Internal arc class AFLR 31.5kA/1s Loss...

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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-5

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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-6

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 • Modular and Robust design for low maintenance and critical power application • SF6 free switchgear, vacuum circuit breaker for safe, compact and reliable solutions General rating Rated voltage 36/38kV Lightning impulse withstand voltage (BIL) 170kV Power frequency withstand voltage (1 min) 70kV Internal arc class AFLR 31.5kA/1s...

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Dowei Electric Air Insulated MV Switchgear AIS-12,AIS-24,AIS-36-7

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