LW38-40.5 Outdoor Sulfur Hexafluoride Circuit Breaker
Production Introduction
Overview:
LW38-40.5 Outdoor Sulfur Hexafluoride Circuit Breaker is a three-pole AC 50Hz outdoor high-voltage switchgear, suitable for the control and protection of 35KV power system, and can also be used to contact circuit breakers and open and close capacitor groups.
Structure:
The LW38-40.5 Outdoor Sulfur Hexafluoride Circuit Breaker is a three-phase discrete porcelain column structure with a pressurized arc extinguisher. The three phases are fixed to a common chassis, and the three-phase gases are connected by steel pipes. The circuit breaker is composed of arc extinguishing chamber, pillar porcelain sleeve, transmission shaft, connecting rod, chassis and spring actuation mechanism.
Arc extinguisher:
The arc extinguishing chamber of the circuit breaker is mainly composed of static contacts, moving contacts, porcelain sleeves, cylinders with nozzles and other components.
Porcelain sleeve:
The porcelain sleeve is the ground insulation part of the main same road of the circuit breaker. Depending on the altitude of the place of use and the level of ambient air contamination, porcelain sleeves with different creepage ratios can be selected.
Gearbox:
The function of the gearbox is to convert the horizontal movement of the mechanism output into the vertical movement of the circuit breaker moving contact through the outer arm, shaft and inner turning arm; Rotary seals are installed at both ends of the shaft. The upper and lower outer arms are equipped with closing shock absorbers and slug buffers respectively.
Molecular sieve:
Installed on the side of the transmission box, the role is to adsorb the water inside the circuit breaker and the hypofluoride produced by the decomposition of sulfur hexafluoride.
Arc extinguishing principle:
The arc extinguishing chamber of the circuit breaker is a single-pressure pressure gas structure: that is, the circuit breaker is filled with 0.45MPa (20 °C gauge pressure) sulfur hexafluoride gas, during the shutter process, the pressure cylinder makes relative movement to the stationary piston, the gas in the pressure cylinder is compressed, and the gas outside the cylinder forms a pressure difference, and the high-pressure sulfur hexafluoride gas strongly blows the arc through the nozzle, forcing the arc to extinguish when the current crosses zero. Once the shutter is completed, this pressure difference quickly disappears and the pressure inside and outside the cylinder is restored to equilibrium. Since the stationary piston is equipped with a check valve, the pressure difference when closing the gate is very small.
Advantage:
a. Excellent breaking performance, short arc time, rated short circuit breaking current of 40kA.
b. Reliable insulation.
c. High mechanical reliability, strong arc extinguishing ability, can be operated frequently.
d. The current of the opening and closing capacitor bank is 630A without re-ignition.
e. It can be equipped with 3~l2 built-in current transformers, with simple structure, small size, and long fmaintenance cycle.
f. The base frame adopts the overall surface treatment process, which has beautiful appearance and g. strong anti-corrosion ability.
Normal use conditions:
Altitude: 3000m and below.
Ambient air temperature: a 30 ~ +40 °C.
Relative humidity: the daily average is not more than 95%, and the monthly average is not at 900/0 (25 ° C).
Wind speed: not more than 700Pa (equivalent to 34m/s).
Pollution grade: IV and below, porcelain sleeve climbing distance J256mm and F.
There are no flammable substances, explosion hazards, chemical corrosion and severe vibrations.
Specification
The main technical parameters of circuit breakers：
| No. | Item | Unit | Data | ||
| 1 | Rated Voltage | kV | 40.5 | ||
| 2 | Rated Insulation(1min power frequency withstand voltage) | kV | 95 | ||
| 3 | Rated Insulation(Rated lightning impulse withstand voltage) | kV | 185 | ||
| 4 | Rated Frequency | Hz | 50 | ||
| 5 | Rated Current | A | 1600 / 2000 / 3150 | ||
| 6 | Rated short-circuit breaking current | kA | 25 / 31.5 | ||
| 7 | Rated order of operations | / | O-0.3S-CO-180S-CS | ||
| 8 | Rated short-circuit opening and closing current（Peak） | kA | 63 / 80 | ||
| 9 | Rated peak withstand current | kA | 63 / 80 | ||
| 10 | Rated withstand current for short periods | kA | 25 / 31.5 | ||
| 11 | Rated short circuit duration | s | 4 | ||
| 12 | Rated pressure of sulfur hexafluoride gas (gauge pressure at 20°C) | Mpa | 0.45 | ||
| 13 | Replenishment pressure of sulfur hexafluoride gas (gauge pressure at 20°C) | Mpa | 0.42 | ||
| 14 | Sulfur hexafluoride gas lock-up pressure (gauge pressure at 20°C) | Mpa | 0.40 | ||
| 15 | Sulfur hexafluoride gas moisture content (gauge pressure at 20°C) | % | ≤1 | ||
| 16 | Annual gas leakage rate | ppm | ≤150 | ||
| 17 | Mechanical Lifetime | t | 10000 | ||
Prodection details
Product outline and installation dimensions：
（Unit:mm）
Company Profile
Shaanxi Huadian Electric Co., Ltd. is a new type of enterprise with professional manufacturing of high-voltage power transmission and transformation equipment, in order to integrate into the excellent situation of the development of the western region and international standards, the company has achieved good results in new product development, production and sales performance, etc., and its popularity has been continuously improved, becoming a leader in the domestic electrical industry. The company is located in Baoji, Shaanxi, is a research and development, production, sales integration of the factory. Strict modern management, scientific production and operation, exquisite production technology, advanced production equipment, to provide good conditions for the production of high-quality products.
Production Workshop
Prodect qualification
Certifications
Delibery and Payment
Different shipping to various countries
Fast and Reliable
Most kinds of payments are acceptable
Safe and Eiffective
FAQ
1. Could you send your price list ?
Send inquiry to mailbox and inform your product details, then price list will be sent within 24 hours.
2.What about the shipment cost?
It depens on the destination and the deliver way.
3.How about the lead time?
7-12 working days
4.How to solve the quality problems after sales?
A: If it happens, we will make a satisfied solution for the customer within 3 days.
Hot Tags: lw38-40.5 outdoor sulfur hexafluoride circuit breaker, polyphase circuit breaker, circuit breaker arcing contacts, reactor circuit breaker, specific application circuit breaker, school circuit breaker, branch circuit breaker
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