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Home » Products » Live Tank Circuit Breaker » Live Tank Circuit Breaker

Live Tank Circuit Breaker

Live Tank Circuit Breaker
Live Tank Circuit Breaker
Product Code : SF6 Type EDF SK
Brand Name : ABB
Price And Quantity
  • Unit of Measure
  • Unit/Units
  • Minimum Order Quantity
Trade Information
  • Payment Terms
  • Cash Against Delivery (CAD), Cash in Advance (CID), Others
  • Supply Ability
  • As per the buyers requirement
  • Packaging Details
  • Carton Packaging / Wooden Packaging / Customized Packaging
  • Main Export Market(s)
  • Asia, Australia, Central America, North America, South America, Eastern Europe, Western Europe, Middle East, Africa
  • Main Domestic Market
  • All India
Product Description

Since in the year 2013, we have been instrumental in putting forth a top grade range of Live Tank Circuit Breaker to the valued patrons. This breaker is manufactured under the strict guidance of skilled professionals by utilizing high quality components and innovative techniques. This is a special kind of automatic device that is used to stop the flow of current in circuits in case of over voltage or short circuit. In addition, this Live Tank Circuit Breaker can be purchased from us at competitive prices.

Features:

  • Non corrosive
  • Robust construction
  • Excellent efficiency
  • Low operating energy

 

Live Tank Circuit Breaker - Type EDF SK

Main features and advantages

The EDF SK circuit breaker is based on the latest developments in arc research and offers the following advantages:

  • Restrike-free interruption of capacitive currents due to high inherent dielectric strength of SF6 gas and optimised contact movement
  • Low over-voltages when switching inductive currents due to optimum quenching at current zero
  • High dielectric strength even when SF6 gas is at atmospheric pressure due to wide contact gap
  • Low operating energy - reduced mechanical stress on breaker and low reaction forces on the foundation
  • High making capacity even in the case of parallel connected capacitor banks
  • High seismic capability due to optimised pole and structure design
  • Easy installation and commissioning. Each circuit breaker is pre-tested and shipped to site in the form of few easily inter-connected units

Rated voltage

36 - 84 kV

Rated current

up to 2500 A

Rated breaking current

up to 31.5 kA

Rated frequency

50 and 60 Hz

Installation

Outdoor

Technical data

Values complying with IEC 62271-100 and ANSI C37

EDF SK 1 – 1


36

52

72.5

84

Rated Voltage

IEC kV

36

52

72.5

84

ANSI kV


38

-

72.5

84

Power frequency withstand voltage

1 min dry

IEC kV

70

95

140

140

1 min wet

IEC kV

70

95

140

140

1 min dry

ANSI kV

105

-

160

-

10 sec wet

ANSI kV

105

-

140

-

Lightning impulse withstand voltage (LIWL)

IEC kV

170

250

325

325

Full wave 1,2/50 µs

ANSI kV

200

-

250

-

Chopped wave 2 µs

ANSI kV

258

-

452

-

Chopped wave 3 µs

ANSI kV

230

-

402

-

Creepage distance to earth 1) 2)

mm

1390

1390

1995

1995

Creepage distance across break1) 2)

mm

1995

1995

1995

1995

Rated normal current

A

2500

2500

2500

2500

Rated breaking current 3)

at 50 Hz kA

31.5

31.5

31.5

25


at 60 Hz kA

31.5

31.5

31.5

-

First pole to clear factor

1.5

Making current 3)

at 50Hz kAp

79

79

79

62.5


at 60Hz kAp

82

82

82

-

Duration of short circuit

s

3

Closing time

ms

60

Opening time

ms

35

Total break time

ms

55

Dead time

ms

300

Rated reclosing time, 60 Hz

ANSI cycles

20

Rated operating sequence

IEC and ANSI

O – 0.3 sec – CO – 3 min – CO

ANSI

CO – 15 sec – CO


1) Other values on request.
2) Tolerance according to IEC 233.
3) 100% SF6 gas.

Data and illustration without engagement. We reserve the right to make changes in the course of technical development.

Shipping data

Type

Number of cases

Total Volume

Total Gross weight

Total Net weight

EDF SK 36 - 84 kV three pole operation, incl. one op. mechanism and support columns

2

3.8

1123

873

EDF SK 36 - 84 kV single pole operation, incl. three op. mechanism and support columns

2

4.9

1490

1190


Design

The circuit breaker pole includes the breaking unit, the support insulator and the pole linkage housing. The three poles of the breaker are mounted on a common support frame with the operating mechanism arranged below the same frame.

The three breaker poles have a common gas system. For operations up to –300 C, the system is filled with SF6 gas at a pressure of 0.7MPa (abs), at a temperature of +200 C.  For applications where temperatures is as low as –500 C the common gas system is filled with a mixture of SF6 gas and Nitrogen gas. When the SF6 and Nitrogen gas mixture is used the breaking capacity is normally reduced one IEC step for e.g. 31.5 to 25 kA.

The operating reliability and service life of an SF6 circuit breaker is dependent on the maintenance of SF6 gas pressure and neutralisation of the effects of moisture and decomposed products in the gas. The above is achieved by:

  • Double O-rings of Nitrile rubber used for sealing purposes with excellent results
  • Each breaking unit is provided with an absorber that absorbs moisture and gaseous decomposed products
  • Interruption capability is a function of SF6 gas density. A density monitor consisting of a temperature-independent pressure switch is provided in the circuit breaker
  • Temperature-dependent pressure variations of SF6 gas are compensated by hermetically sealed reference gas volume. An alarm signal is triggered when pressure drops due to loss of gas


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CUMMINS PRODUCTS & SERVICES
55, Ezra Street, Kolkata - 700001, West Bengal, India
Mr. Sai Gopal Mohta (Proprietor)

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