Shanxi Lanhe Electronic Engineering Co., Ltd.
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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：

35kV Short Circuit Current Limiter
Listing date： 2018-04-25

DDX1 short-circuit current limiter is an ultra-high-speed switch with strong short-circuit current breaking ability. The short-circuit fault can be completely cut off within 10ms after the short-circuit fault occurs and before the peak value of the pre-expected short-current is arrived. It combines blasting cutting technology, current-limiting fuse technology, high voltage insulation technology, electronical measurement and control technology perfectly. It realizes the quick current-limiting cut-off of short-circuit current of power generation, power distribution and power consumption systems, and prevents main equipment of the power system such as generators, transformers from being impacted by catastrophic short-circuit current. At the same time, the operation mode of the power distribution system can be improved to achieve the effects of saving energy, improving power quality and improving power supply reliability.
Product description


DDX1-12 Rated electrical parameters of products：

number

Parameter name

Unit

Technical date

1

Rated voltage

kV

40.5

2

Rated current

A

630-6300

3

Rated pre-expected short-circuit breaking current

kA

50-200

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

95

Lightning impulse withstand voltage

kV

185

Product features and advantages

◆Strong short-circuit breaking capability ( large capacity ): rated breaking short-circuit current is 50kA～200kA

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

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

◆The action criterion adopts current instantaneous value and current change rate instantaneous value.

◆The current sensor is integrated with the fast-speed disconnector, and the structure is simplified

◆The electronic controller works independently in three phases through high temperature and strong interference tests to ensure the overall reliability of the product.

Product Usage

◆ Bypass current limiting reactor (energy saving, consumption reduction, reactive power elimination and power supply quality improvement)

◆ Parallel operation of sectionalized buses in large-capacity distribution system (optimizing load distribution and reducing network impedance)

◆ Short circuit protection of generator outlet or transformer low voltage side

◆ Short - circuit Protection of Branch Busbar and High Voltage Transformer in Power Plant
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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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