LJZ-65(75),High Voltage Current Transformer

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Home > Current Transformer > High Voltage Current Tran...

LJZ-65(75)

LJZ-65(75)

Description

Description

Introduce

LJZ-65(75) zero-sequence current transformer at 35kV and below,AC50Hz line.Zero sequence as the high-voltage electric power system three-phase alternator,motor over-current protection.

Features

LJZ-65(75) pouring of the zero-sequence current transformer is fully enclosed.small size,adaptability to climate,the use of external capacitor compensation,protection of high sensitivity.

This zero-sequence current transformer core high-quailty cold-rolled silicon steel rolling ring,the two secondary coils of the transformer winding along the core ,which coil K1,K3, there is a tap K2,coil a,Xdoes not tap conductive material is enameled.

65(75)window for the three-phase cable penetration,the zero sequence current transformer with a floor of non-magnetic material ,is equipment with a metal nameplate.

Technical Parameter

TRANSDUCER
Electrical insulation strength	zero-sequence current transformer bus ,it‘s only necessary to examine the insulating properties of the secondary coil;
The two secondary coils	The sulation resistance between the two secondary coils of not less than 10 megohms.
The two secondary coils	between the two secondary coils should be able to withstand power frequency test voltage of 3kV (rms)for 1minute
Protection sensitivity	The sensitivity of this zero-sequence current transformer shall meet the fllowing requirement

Specification

Coil terminal symbol of zero sequence current transformer connected to DD-11/60	DD-11/60 earthing relay		A zero sequence current
	Coil connection	Scale value
K1、K2 (a、x connect with acpacitor)	In series	15*1	1-3
		30*1
	Parallel connection	15*2	2-4
		30*2
K1、K2 (a、x not connect with acpacitor)	In series	15*1	3-6
		30*1
	Parallel connection	15*2	2-4
		30*2

Dimensions

LJZ-65(75)

Accuracy test

24Hs online service
365Ds NON-Stop Production 20Ys Professional Manufacturers

Professional designer and manufacturer of current transformer,
cooperated with Siemens ,schneider Fuji electrical softbank LG samdsung.

Tel:13968747975

E-mail: [email protected]

Add:(Zhejiang Lierde Relay Co., Ltd.) Xinguang Ind. Zone, Liushi Town, Wenzhou, Zhejiang, China

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