Zero Sequence Current Transformer

Zero Sequence Current Transformer Voltage Grade: 0.38kv-66kv Grid Frequency:50Hz Ambient Temperature: -10 - 60 c

Zero Sequence Current Transformer

1.Product Overview

When circuit grounds, CT could senses zero-sequence grounding current. To be equiped with relay protector or signal devices, it help device components act for the purpose of protecting or monitoring circuit.

MRD-L series zero-sequence CT is a kind of cable type, using ABS engineering plastics as casing, poured by resin. With beautiful appearance, good hermeticness, high insulation, high sensitivitym, good linearity, easy installation and wide application, it is not only suitable to magnetic relay, but also to electronics and mico-computer devices. CT type is determined by the operation way of user.(Neutral ground, unground,ground by high-resistance,low resistance or arc suprression coil.)

MRD-L series zero-sequence CT core is made of ZH120-130 cold rolled silicon steel sheet imported from Japan with advantages of smooth surface, constant thickness, good conductivity, strong sensitivity to magnetizing, accuracy and stability.

Model Selection Instruction

1)Inner Diameter (select site cable and inner diameter of zero-sequence CT), See table1

Table1

0-sequence CT Spec.	Cable Section(mm2)
φ80	3×50 and below
φ100	3×70     3×95
φ120	3×120 3×150 3×185
φ140	2×(3×150) 3×240 3×300
φ160	2×(3×185)
φ180	2×(3×240)
φ200	3×(3×185)
φ240	3×(3×240) 2×(3×300)   4×(3×185)

2)Mounting size of MRD-LJK/LJB 0-sequence CT, see diagram 2 below

If you need more details, please contact with us