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35kV high voltage SF6 circuit breaker

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SF6 CIRCUIT BREAKER

LW8-40.5T outdoor high-voltage sulfur hexafluoride circuit breaker is an outdoor high-voltage electrical equipment with three-phase AC 50Hz.

It is applicable to the control and protection of 35kV Transmission and distribution system; It can also be used for connecting circuit breakers and opening and closing capacitor banks; The current transformer can be connected for measurement and protection.

Equipped with ct35 or CT10 spring operating mechanism, it complies with the national standard GB1984 AC high voltage circuit breaker.

It is mainly composed of supporting insulator, current transformer, starting element, transmission element, base, operating mechanism, etc.

For more information about LW8-40.5T SF6 circuit breaker, please contact us.

TECHNICAL PARAMETER

Parameter
Technical drawings
Parameter

 

Parameter name Unit   Parameter value
Rated voltage kv 40.5
Rated frequency Hz 50/60
Rated current A 1000/1250/1600
2000/2500/3150/4000
Rated short-circuit breaking current kA 25 31.5 40
Rated short-circuit switching current (peak) kA 60 80 100
Rated short-circuit withstand current (thermal stability current) kA 25 31.5 40
Rated peak withstand current (thermal stability current) kA 63 80 100
Rated out of step breaking current kA 6.3 8.0 10.0
Cumulative breaking times under rated short-circuit breaking current N 30
Rated short circuit duration S 4
Rated lightning impulse withstand voltage Relatively kV 185
Between fractures kV 215
Rated 1min power frequency withstand voltage Relatively kV 95
Between fractures kV 118
Rated operating sequence O-0.3s-CO-180-CO
Closing time MS ≤100
Opening time ≤50
Breaking time ≤50
Closing and opening time ≤60
Closing synchronization ≤3
Opening synchronization ≤2
Voltage of opening coil and opening coil V DC: 220/110
Energy storage motor voltage V AC: 220/110
DC: 220/110
Single circuit resistance µΩ ≤70
Rated SF6 other pressure MPa 0.45
Annual leakage of SF6 gas ≤5%
Moisture content of SF6 gas ppm(v/v) ≤150
Radio interference level µV ≤2500
Mechanical life N 10000
Technical drawings

35kV-SF6-circuit-breaker-drawing

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PRODUCT DETAILS

>>   Installation scenario                                                                                                                                                     / 场景安装
>>   Structural analysis                                                                                                                                                        / 结构解析
>>   Performance characteristics                                                                                                                                       / 性能特点
>>   Structural features                                                                                                                                                        / 结构特点
>>   Service conditions                                                                                                                                                        / 使用条件
>>   Why choose us                                                                                                                                                        / 为什么选择我们

10KV SF6高压断路器

>> 10kV High Voltage SF6 circuit breaker

High voltage circuit breaker is the most important control equipment in power system, which undertakes the dual tasks of control and protection.

On the one hand, 10kV SF6 circuit breaker can reliably connect or disconnect the load current under normal conditions, so as to change the operation mode of power grid.

When the system fails, it can quickly cut off the short-circuit current to ensure the normal operation of non fault equipment.

>> Installation scenario

Hydropower station                                                                                                                                                                                #1
Factory and mining enterprises                                                                                                                                                            #2
Ring network power supply                                                                                                                                                                   #3
Petrochemical Enterprises                                                                                                                                                                     #4

>> Structural analysis

Structural-analysis-00
Structural-analysis-01

01.Current transformer >> The circuit breaker can be equipped for differential or overcurrent protection

02.Pedestal >> Function of support and fixation

03.Disconnect the original >> It is composed of electrical control unit, energy storage mechanism unit andvdriving mechanism unit

04.Transmission element >> Transfer the operation command and operation work to the  contact and other parts of the breaking element

05.Disconnect the original >> The part that performs the openingand closing of the circuit

06.Support insulator >> Ensure reliable electrical insulationof breaking elements

Structural-analysis-02

>> Performance characteristics

1. Reliable breaking performance: self energy arc extinguishing technology is adopted, which can continuously break 40.5ka short-circuit current for 22 times without maintenance.

2. Reliable mechanical operation performance: the mechanical service life of the short circuit breaker can reach 6000 times in continuous operation. After simple adjustment, it can reach more than 10000 times, with high operation reliability.

3. Reliable insulation capacity: the specific creepage distance of external insulation is > 31m / kV, with strong pollution resistance. It is suitable for safe operation in harsh environment with altitude not exceeding 3000m. The insulating pull rod can withstand 250kV / 5min in the air.

4. Reliable sealing performance: ensure that the annual leakage rate of sulfur hexafluoride gas is far less than 0.5%.

5. The dehumidification process of product parts is strict: the moisture content of SF6 is far lower than that of similar products.

Characteristics-of-10kV-SF6-circuit-breaker-03
Characteristics-of-10kV-SF6-circuit-breaker-01
Characteristics-of-10kV-SF6-circuit-breaker-02

>> Structural features

Arc extinguishing principle

>>Self-energy arc extinguishing using arc energy to establish the pressure value needed for arc blowing
>>Use its own ability to heat the SF6 gas in the gas storage chamber
>>Form a high-speed air flow at the nozzle, when the current exceeds zero, the arc is extinguished

Arc-extinguishing-principle 01

1. The circuit breaker adopts the self energy arc extinguishing principle with low operating power.

2. The valve plate of the arc extinguishing chamber is made of a new type of special alloy with high temperature resistance and light weight. Compared with similar products made of traditional materials, the air flow characteristics and breaking performance are more stable and reliable.

3. The nozzle is composed of PTFE (polyoxyethylene) and other trace components, with stable breaking performance and strong burning resistance.

4. The porcelain bushing is adopted, which has good bending resistance, strict and reliable production process and quality control, and can ensure the safe operation of the circuit breaker.

5. The insulation pull rod of the circuit breaker adopts special relaxation measures to make the operation of the circuit breaker more reliable.

6. The spring operating mechanism with small operating power, light weight and low noise is adopted, which has no leakage and high reliability.

7. The important parts in the mechanism are forged from alloy steel, with high strength and wear resistance, which can ensure the frequent operation of the circuit breaker and low failure rate.

8.The electrical components of secondary circuit and SF6 density controller are excellent products.

9. The product has novel and bright appearance and compact structure. The installation underframe is made of thick steel plate, the surface adopts hot-dip galvanizing process, the exposed fastening adopts high-strength hot-dip galvanized screw, the interphase transmission connecting rod adopts high-strength aluminum profile or stainless steel profile, the mechanism box is stainless steel, and the corrosion resistance of the product is excellent.

>> Service conditions使用条件

Normal-service-conditions

The normal service conditions shall comply with the provisions of GB / t1022-1999 general technical conditions for high voltage switchgear, namely:

1. Altitude: ≤ 1000m (lw36-126g can be used for 3000m);

2. Ambient temperature: ≤ + 40 ℃, ≥ - 40 ℃;

3. Wind pressure: ≤ 700pa (equivalent to wind speed 34m / s);

4. Daily temperature difference: 25 ℃;

5. Sunshine intensity: < 1W / cm2

6. Seismic capacity: horizontal acceleration 0.25g;

7. Icing thickness: < 10mm;

8. Pollution degree: class I;

9. Installation site: outdoor.

>> Why choose us

DESIGN SERVICES

Packaging design and improved product mix have a history of more than 20 years. It is the most important to establish and maintain the unique characteristics and style of products

PRODCUCT SAMPLING

Mass production can only start after you approve it

OEVELOPMENT

New product development, different market characteristics and commitment to international trade facilitation, credibility and transparency

AFTER-SALES

Customer feedback: actively looking for solutions to problems, professional technical guidance and long-term after-sales service

奖状

COMPANY INTRODUCTION

公司图片
Company profile

       Lawrence Electric Co., Ltd. is a high-tech enterprise focusing on power transmission and distribution products, providing customers with one-stop service of power transmission and distribution products.

        It mainly produces and sells lightning arrester, insulator, fuse, isolation / load switch, SF6 / vacuum circuit breaker, power supply fittings, optical cable fittings, switch cabinet and other transmission and distribution products. The company has production bases and sales centers in Jiangxi, Zhejiang, Uganda, Tanzania and other places.

Nature of Business

        Our products have operated safely in the power supply systems of more than 20 countries and regions around the world for more than 10 years. They are also qualified suppliers of China State Grid and China Southern Power Grid. At present, they have gained a good reputation in the field of power system in the world.

world

        We have received high-quality product recommendation letters from power supply companies in Kenya, Uganda, Tanzania, Zambia, Guinea, Ghana, Togo, Mozambique, Nepal, Guyana, Myanmar and other countries and regions.

Real shooting factory

factory

Conformity inspection

test

Ehibition

xhibition

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PACKAGING AND TRANSPORTATION

Packaging-and-transportation

SHOPPING INSTRUCIONS

Warranty

We are aware of the quality assurance. If you have any question, please contact the customer service, so as to ensure that you can use them and solve your worries.

About Delivery

The production cycle is generally 10 to 30 working days depending on the product. In case any urgent materials please contanct with us for fast delivery.


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