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We are the supplier and exporter of low & medium voltage electric equipements: Electric Connectors, Industrial Plugs, XAC Pendent Pushbutton Switches, APP SB Power Connectors ,Contacts,Split Core Transformer, Clamp Transformer, Distribution box, LED Lampes. And crane parts: Electirc Hoist, Terminal Blocks, COB,XAC Pendant Control Stations, Crane Overload Detector, Cut off limit..

LW39 126 Outdoors AC HV SF6 Live-tank Circuit Breaker

LW39-126 Outdoors AC HV SF6 Live-tank Circuit Breaker

Type LW39-126  HV SF6 Live-tank Circuit Breaker is a new product in high performance. According to the national standards, the designation of it results from absorbing and digesting the advanced technology of SF6 circuit breaker from abroad.
      Type LW39-126 can be used in the power system with frequency 50HZ, nominal voltage system 110KV to protect and control the apparatuses in the power plant and substation. It can be fitted with CT type spring-operated mechanism and three-phase mechanical interlocking operation. It is filled with SF6 gas in high performance of arc extinguishing. In order to prevent leakage, double O ring is used for sealing.

Features  of this LW39-126 Outdoors AC HV SF6 Live-tank Circuit Breaker
      a. High performance of breaking, which has the capability to cut off the short-circuit and pull out of the outgoing point, and resolve the close-in faul .
      b. The arc-chutes manufactured by the technology of spinning with high quality of airflow and simple structure .
      c. Longer electrical service life, the ability of breaking for 20times on full capacity, and long interval for maintaining, free maintenance for 10 years under the normal operation .
      d. Operation mechanism in low energy which is simple, reliable and neat .
      e. Low rated pressure, not be liquefied under low temperature . 
      f. Smaller area occupied .
      g. Low noise, used in residential areas .
      h. Instant on-site installation .

Technical parameter :

                                 Name

Unit

Parameter

Rated voltage

KV

126

Rated frequency

Hz

50

Rated current

A

3150

Rated short circuit breaking current

KA

31.5/40

Rated short time withstand current

KA/s

31.5 (4)/40(3)

Rated peak making current

KA

100

Rated peak withstand current

KA

100

All breaking time

Ms

<=65

Closing time

Ms

<=110

Breaking factor of first phase

 

1.5

Out -of-phase breaking current

KA

10

Rated operation sequence

 

0-0.3s-CO-180s-CO

Continuous breaking rated short-circuit current endurance

Times

20(40kA)

Mechanical endurance

Times

6000

Rated SF6 gas pressure

M pa

0.55MPa/0.60

Rated power frequency withstand voltage

Phase-to-earth, phase-to-phase

KV

275

Isolating distance

KV

275

Rated lightning impulse withstand voltage

Phase-to-earth, phase-to-phase

KV

650

Isolating distance

KV

650