1. Product Overview

SMR-H2L high-precision zero sequence current transformer can still maintain good accuracy when the input current at the primary side is small, which makes up for the defects of traditional zero sequence current transformer, and can make high resistance grounding and grounding initial phase angle tend to zero °、 The residual current after arc suppression coil compensation is small, which plays a key role in the accurate diagnosis and rapid isolation of these problems. The core of smr-h2l high-precision zero sequence current transformer is made of special material (permalloy or microcrystalline) which is different from conventional transformer core. Its characteristic is high permeability of weak magnetic field, which is the basis of high-precision zero sequence performance; The user can select the appropriate zero sequence current transformer according to the different operation modes of the system (neutral point grounding or neutral point ungrounded, grounding through large resistance, grounding through small power unit and grounding through arc suppression coil).

2. Product Features

The special zero sequence achieves the accuracy level of 0.5s (measurement level 0.2S) in the measurement range of 1% ~ 120%; The accuracy level of 5p10 protection is achieved in the range of rated value to 10 times of rated value.