ZW7-40.5 33kV 35kV Miniature Outdoor High-Voltage Vacuum Circuit Breaker

Рубрика вакуумные выключатели серии

✅ Compact Size & Light Weight

✅ Wide Range of Applicable Working Environments

✅ Local & Remote Intelligent Control Available

✅ Stable Vertical Magnetic Field Arc Extinguishing

✅ 10,000 Times Mechanical Operation Life

Детали

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1. Product Brief Introduction

ZW7-40.5 outdoor high-voltage vacuum circuit breaker is equipped with split independent poles and high-reliability integrated operating mechanism.

It is designed for outdoor power transmission and distribution systems to switch load current, overload current and short-circuit current reliably. Featuring miniaturized lightweight structure, maintenance-free performance, long service life and strong environmental adaptability, this vacuum circuit breaker is widely used in urban & rural power grids, industrial and mining power supply, wind power stations, photovoltaic power stations and other outdoor power facilities.

2. Core Product Advantages

Superior Operational Reliability

Adopts split pole layout and mature spring operating mechanism to guarantee stable operation without jamming. The vertical magnetic field vacuum interrupter provides outstanding short-circuit breaking capacity.
Maintenance-Free Integrated Structure

Fully sealed integral design, no regular disassembly, lubrication or routine maintenance required, effectively cutting later operation and maintenance costs.
Extra Long Service Life

Mechanical service life reaches 10,000 times, and the rated short-circuit breaking cycle can be realized 30 times, supporting long-term continuous outdoor operation.
Miniaturized & Lightweight for Easy Installation

Compact overall layout with a total weight of around 800kg, occupying less space, suitable for pole-mounted and outdoor cabinet installation scenarios.
Excellent Environmental Adaptability

Works stably under harsh outdoor conditions including low temperature, high altitude, strong wind and heavy pollution.
Multiple Intelligent Control Methods

Matched with intelligent controller for local closing and opening operation. Remote control via optical port is supported. Device data can be transmitted to central control room through cables, optical cables, GPRS, CDMA, GSM and other communication channels.

3. Operating Environmental Conditions

Parameter Item	Standard Value
Ambient Working Temperature	-30℃ ~ +60℃
Storage Temperature	-40℃ ~ +85℃
Высота	≤2000m
Maximum Allowable Wind Speed	≤34m/s
Pollution Class	Class Ⅳ

4. Complete Technical Parameters

4.1 Main Electrical Technical Data

Нет.	Артикул	Единица	Технические характеристики
1	Номинальное напряжение	кВ	40.5
2	Номинальный ток	A	1250 / 1600
3	Номинальная частота	Гц	50 / 60
4	1min Power Frequency Withstand Voltage (Wet/Dry) Phase-to-ground / Fracture	кВ	80, 95 / 95
5	Lightning Impulse Withstand Voltage (Peak) Phase-to-ground / Fracture	кВ	185
6	Rated Short Circuit Breaking Current	кА	25 / 31.5
7	Rated Short Circuit Making Current (Peak)	кА	63 / 80
8	Rated Peak Withstand Current	кА	63 / 80
9	4s Short Time Thermal Withstand Current	кА	25 / 31.5
10	Rated Operating Sequence	—	O-0,3s-CO-180s-CO
11	Rated Short Circuit Breaking Times	Times	30
12	Mechanical Life	Times	10000
13	Mechanism Control Voltage	V	AC/DC 220 / 110
14	Secondary Circuit 1min Power Frequency Withstand Voltage	кВ	2

4.2 Mechanical Performance Data

Нет.	Артикул	Единица	Standard Parameter
1	Contact Opening Distance	мм	18±1
2	Contact Over-travel Distance	мм	4±0.5
3	Скорость открытия	м/с	1.2–1.8
4	Скорость закрытия	м/с	0.5–0.8
5	Contact Closing Bounce Time	мс	≤5
6	Standard Center Distance Between Three Phases	мм	710±3
7	Three-phase Closing/Opening Time Difference	мс	≤2
8	Single-phase Circuit Resistance	μΩ	＜ 80
9	Total Closing Time	мс	≤100
10	Total Opening Time	мс	≤50
11	Overall Weight	кг	Approx. 800

5. Structure & Working Principle

5.1 Overall Structure Composition

ZW7-40.5 vacuum circuit breaker mainly consists of three independent poles, optional current transformers and integrated spring operating mechanism. When connected with an intelligent controller, local switching operation can be realized. Remote control and real-time data upload to central control room are available via optical communication ports and multiple transmission media.

5.2 Vacuum Arc Extinguishing Principle

The equipment adopts high-performance vacuum interrupters for arc extinction and insulation. An electric arc generates between moving and static contacts during breaking operation. The special contact structure forms vertical magnetic field in contact clearance, spreading the arc evenly on contact surfaces to maintain low arc voltage. When AC current crosses zero, residual ions, electrons and metal vapor inside the interrupter rapidly recombine and condense on contact and shield surfaces. Dielectric strength recovers instantly to extinguish the arc completely, realizing reliable circuit breaking. The vertical magnetic field arc control system ensures consistent and powerful short-circuit breaking capacity.

5.3 Energy Storage & Operation Mechanism

Motor Energy Charging

Motor torque drives small gear, transmits power to main shaft large sprocket, rotates knee arm to compress and charge closing spring. The limit switch cuts off motor power automatically once charging completes.
Manual Energy Charging

Rotate manual operation shaft to transfer torque through gear set, drive knee arm and finish closing spring charging manually.
Electromagnetic Closing Operation

After receiving closing signal, closing electromagnetic core lifts to shift release lever, rotates closing half shaft counterclockwise and unlocks closing latch. Cam impacts swing arm and transmits force through connecting rod to complete closing action. Manual closing function works with the same mechanical logic via shifting fork rotation.
Auto Reclosing Function

After spring energy release and closing completion, the mechanism recharges automatically. Under energy-charged closing state, the breaker can perform one-time auto-reclosing once receiving valid reclosing signal.
Electromagnetic Opening Operation

Upon opening signal input, opening electromagnetic core pushes release lever upward to rotate opening half shaft, unlocking opening latch. Driven by opening spring, swing arm rotates counterclockwise to finish opening. Manual opening shares identical mechanical principle via shifting fork.
Over-Current Tripping Protection

When over-current flows through over-current release, electromagnetic tripping component pushes tripping lever to rotate opening half shaft, triggering opening action and cutting off faulty circuit automatically.

6. Installation Drawing

ZW7A-40.5 standard installation outline dimension drawing is provided for pole-mounted and outdoor cabinet layout design, including overall width, phase spacing and mounting hole position parameters for construction reference.

7. Application Scenarios

Urban and rural overhead distribution power grids
Wind power and photovoltaic power station outdoor switching equipment
Mining, chemical and industrial enterprise outdoor power supply systems
Railway, highway and municipal engineering outdoor power distribution stations
Outdoor box-type substation supporting switchgear

8. After-Sales & Customization Service

Free technical parameter selection support
Customizable current transformer configuration and communication modules
Complete installation, operation and maintenance manual supplied
Long-term spare parts supply and remote technical guidance
Global one-stop delivery service for bulk orders