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Contact us
  • Shanxi Lanhe Electrical Engineering Co., Ltd.
    TEL: 86-29-84251056

    FAX: 86-29-88318201

    E-mail:sxlhdq@126.com
product name：

DGK Large Capacity High Speed Current Limiting Breaker
Listing date： 2018-04-25

（1）DGK is mainly used in small current systems with rated current＜630A, and rated breaking current ≤200kA.

（2）DGK can limit the current and cut off the short-circuit current within 10ms, so that the current actually appearing in the fault circuit is only (15 ~ 50) % of the expected short-circuit current.

（3） TXB3=DGK+ switch cabinet with different configurations. TXB3 is made up of DGK and general switching equipment such as vacuum circuit breaker, load switch or disconnector in series. For normal switching operation and operation of load current or overload current, it is completed by the switching equipment (load switch or circuit breaker) in TXB3 device.

（4）The product not only realizes low-cost switching off of short-circuit current, but also avoids improving the dynamic and thermal stability parameters of related electrical equipment on the branch circuit, thus achieves the rational design of the circuit and reduces the investment of engineering equipment.
Product description

Product overview

Main technical parameters：

number

Parameter name

Unit

Technical date

1

Rated voltage

kV

3.6~24

2

Rated current

A

6.3~500

3

Rated pre-expected short-circuit breaking current

kA

20-120

4

Current limit coefficient = cut-off current / the peak Value of Pre-expected Fault Current

%

15~50

5

Insulation level

Power frequency withstand voltage

kV/1min

42/48

Lightning impulse withstand voltage

kV

75/85kV

Product features and advantages：

◆Breaking speed is fast (High speed): Total breaking duration:<10ms

◆The breaking process has obvious current limiting characteristics (Current limiting)

◆It is mainly used for small rated current systems.

◆Non-standard cabinet types are assembled according to the engineering requirements. There are various configuration schemes.

◆The cost of replacing a large number of switches and other main equipment in a transformer substation is reduced.

Product Usage：

◆The rapid short circuit protection of auxiliary branch buses in hydropower plants, limit and quick break the high-amplitude short circuit current, avoids using the expensive generator circuit breakers, improves technical economy.

◆Outlet of large synchronous motor

◆It is used for quick disconnection of the feeders prone to short circuit fault and quick isolation of the fault points.
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Contact us /
Shanxi Blue River Electrical Engineering Co., Ltd.
TEL：+86 029-8425 1056
FAX：+86 029 8831 8201
E-mail:sxlhdq@126.com
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