High Voltage Current Transformer

LJZ-65(75)

Item No.: LJZ-65(75)
The current transformer is only  suitable for indoor.And three-phase three-core cable outside diameter not greater than65~75mm
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
Add:(Zhejiang Lierde Relay Co., Ltd.) Xinguang Ind. Zone, Liushi Town, Wenzhou, Zhejiang, China
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