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SMR-H2L High Precision Zero Sequence Current Transformer
- Description
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1. Product Overview
The SMR-H2L high-precision zero-sequence current transformer can maintain good accuracy even when the input current on the primary side is low, compensating for the shortcomings of traditional zero-sequence current transformers. It plays a key role in the accurate diagnosis and rapid isolation of difficult issues in single-phase grounding faults, such as high-resistance grounding, grounding initial phase angle approaching 0°, and small residual current after arc suppression coil compensation. The core of the SMR-H2L high-precision zero-sequence current transformer uses special materials (such as permalloy or ultra-microcrystalline) that differ from conventional transformer cores, characterized by high permeability in weak magnetic fields, which is the basis for high-precision zero-sequence performance. Users can select appropriate zero-sequence current transformers based on the operating mode of the system (grounded or ungrounded neutral point, grounded through high resistance, grounded through small resistance, grounded through arc suppression coil).
2. Product Features
The dedicated zero-sequence achieves an accuracy level of 0.5S (measurement level 0.2S) within a measurement range of 1% to 120%; it achieves a protection accuracy level of 5P10 within the rated value to 10 times the rated value.
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