ZW7A-40.5 Outdoor High Voltage Vacuum Circuit Breaker | Enhanced Grid Protection | Chennuo Electric-Chennuo Electric Technology Group Co., Ltd

ZW7C-40.5 Series Outdoor High Voltage Vacuum Circuit Breaker (Side Mounted/Mid Mounted)

ZW7C-40.5kV Series Outdoor High Voltage Vacuum Circuit Breaker (Miniaturized)

The ZW7c-40.5 Series Outdoor High-Voltage AC Vacuum Circuit Breaker is a three-phase AC 50Hz outdoor high-voltage switching device featuring a compact, miniaturized design. It is specifically engineered to pair with new energy power station SVG products to realize soft-starting switch functions. Featuring strong breaking capacity, safety and reliability, frequent operation capability, and a maintenance-free design, this breaker complies with national and international standards such as GB1984-2014 and IEC62271-100:2001.

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Feature

Miniaturized & Compact Design: Engineered with a streamlined, space-saving footprint to suit modern outdoor installations where spatial efficiency is critical.

High Breaking Capacity & Safety: Delivers robust breaking capabilities combined with high operational safety for demanding power distribution and new energy networks.

Frequent Operation & Maintenance-Free: Built to support high-frequency switching tasks with long operational lifespans and virtually maintenance-free cycles.

Strict Standards Compliance: Fully compliant with GB1984-2014 (AC High-Voltage Circuit Breakers) and IEC62271-100:2001 standards.

Parameter

Tech. parameters			Unit	data
Rated voltage			KV	40.5
Rated insulation level	Rated short-time withstand voltage	Dry test	KV	95
		Wet test	KV	80
	Lightning impulse withstand voltage (peak)		KV	185
Rated frequency			Hz	50
Rated current			A	1250、1600、2000
Rated short-time withstand current			kA	20、25、31.5
Rated peak withstand current			kA	50、63、80
Rated short-circuit breaking current			kA	20、25、31.5
Rated short-circuit making current			kA	50、63、80
Rated short-circuit duration			s	4
DC component of rated short-circuit breaking current				37
Peak transient recovery voltage (TRV)			kV	114
Rated power supply voltage for closing/opening devices and auxiliary circuits			V	AC/DC220
Rated operating sequence				0-0.3s-C0-180s-C0
Opening time			ms	≤50
Closing time			ms	≤140
Full breaking time			ms	≤80
Rated cable charging breaking current			A	100
Classification				E2-C2-M2(10000)
Number of times rated short-circuit breaking current has been used			times	20

Environmental conditions:
1.Ambient air temperature: +60℃ to -30℃
2.Altitude not exceeding 2000m
3.Wind pressure not exceeding 700Pa (equivalent to wind speed of 34m/s)
4.No frequent severe movements
5.Air pollution level: Grade III

Typical Application Scenarios：

New Energy Power Stations (SVG Pairing): Perfectly matched with Static Var Generator (SVG) products in new energy power plants to achieve soft-starting switch functions.
No-Load Line Switching: Widely utilized in power scenarios requiring the switching and opening/closing of empty load-carrying transmission lines.
Capacitor Bank Control: Reliable switching and management of capacitor bank groups within high-voltage power grids.

Frequently Asked Questions (FAQ)

Q1: What is the primary purpose of the ZW7c-40.5 series circuit breaker?
A: The ZW7c-40.5 is primarily designed as an outdoor high-voltage switching device for 50Hz systems, notably used to pair with new energy power station SVG products for soft-starting, switching empty load-carrying lines, and opening/closing capacitor bank groups.

Q2: What standards do these compact outdoor vacuum circuit breakers comply with?
A: They strictly comply with GB1984-2014 (AC High-Voltage Circuit Breakers) and IEC62271-100:2001 (High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers).

Q3: What are the altitude and temperature limits for standard and high-plateau models?
A: The standard model supports altitudes up to 2000 meters, while the high-plateau model supports up to 4000 meters. The operational ambient temperature ranges from -35°C to +40°C.

Q4: Can the ZW7c-40.5 operate in heavy icing and polluted environments?
A: Yes. The circuit breaker is rated to handle an ice thickness of up to 20mm, wind speeds up to 34m/s, and a III-class environmental pollution resistance value, provided it is installed away from flammable, explosive, chemically corrosive, and severe regular vibration sites.