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：

DC Short Circuit Current Limiter
Listing date： 2018-06-14

The quick action mode and switching-off principle of the DC short-circuit current limiter is the same. It would be switched off before the instantaneous current of short-circuit current gets to the expected current limiting value. The actual maximum instantaneous value of short-circuit current is far lower than the first half-wave peak value of short-circuit current. It provides an economical and reasonable short-circuit current solution for DC users of the power systems. The differences between it and the traditional AC products are: (1) sensors; (2) electronic controller; (3) fuse. The products have been successfully applied to Wenchang submarine cable repair project, CNOOC direct current transmission project, Guizhou distribution network project, etc., and have won unanimous favorable comments from customers.
Product description

Product Overview

Main technical parameters：

number

Parameter name

Unit

Technical parameter

1

Rated voltage

kV

12-40.5

2

Rated current

A

630-6300

3

Rated pre-expected short-circuit breaking current t

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

42-95

Lightning impulse withstand voltage

kV

75-185

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 can be used both indoors and outdoors and can be used dispersedly or in a set of cabinet.

◆At present, the only manufacturer in China that can apply the DC system current limiter products

Product Usage：

◆ Protection of DC Transmission and Distribution System

◆Fast Protection of DC System Cables and Power Electronic Devices
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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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