Our company produces BW-LJ series zero-sequence current transformers, zero-sequence current transformers (cable type) with 40mm ~ 300mm aperture, high-precision zero-sequence current transformers with various capacity, variation and accuracy limit coefficient, and high-sensitivity zero-sequence current transformers supporting small current grounding line selection devices, relays and so on. The products are divided into two types: integral and combined. Transformer adopts engineering plastics shell, casting resin perfect sealing, good appearance, easy installation, saving installation space, specification variety, can adapt to the needs of all kinds of protection device, and a variety of power system operation mode (neutral point grounding, neutral point grounding, grounding resistance, small resistance grounding, arc suppression coil grounding).

Purpose: A with DL1 1/60 relay

B with DL.11/0.2 relay

J With arc suppression coil, microcomputer protection, small resistance grounding system

Technical performance index

● AC voltage above 0.4kV (cable).

● Power grid frequency 50Hz.

● Homonymous end: once through "L1" side, twice through "K1"

● Models and data, dimensions see chart.

● Ambient temperature: maximum temperature +60°C, daily average temperature does not exceed +40C, minimum temperature -5°C.

● Altitude not more than 1000m (special order when using plateau).

● Relative humidity < 85%.

Custom

● Product model, inner hole diameter (mm).

● Primary zero sequence current, secondary current (or current ratio).

● Secondary load capacity or load impedance.

● Accuracy limit coefficient, accuracy level (if any).