The LFZB1 series high-voltage current transformer is an epoxy resin cast insulation fully enclosed product, suitable for current and energy measurement and relay protection in indoor power lines and equipment with rated voltage levels of 10kV and below, rated frequency of 50Hz or 60Hz. This type of transformer has the characteristics of small size, light weight, superior insulation performance, high precision, and high dynamic and thermal stability multiple. It is a new product specially designed to replace the old model LAJ-10 (semi closed). Its appearance and installation dimensions are the same as the old product, and it can be completely replaced. It can also be made into various special specifications according to user needs, with strong flexibility. Compliant with IEC44-1:1996 and GB1208-2006 "Current Transformers" standards.

Meaning of LFZB1 series high-voltage current transformer models


Structure Introduction
The LFZB1 series high-voltage current transformer is a fully enclosed structure, with an iron core made of excellent magnetic conductive material. The primary and secondary windings, as well as the iron core, are all cast in epoxy resin, which has excellent insulation performance and moisture resistance, and is easy to maintain on the surface. The primary output lines P1 and P2 are located on both sides of the casting body, and the secondary winding output end is in the middle of the casting body. The first group is the metering winding (0.2S level, 0.2 level), marked as 1S1 and 1S2; the second group is the monitoring winding (0.5 level), marked as 2S1 and 2S2; The third group is the protection level winding (10P level), marked as 3S1 and 3S2. If the customer needs, the accurate level combination can be changed arbitrarily. The transformer is of reduced polarity, and the four M10 copper inserts in the middle are the installation holes for the transformer.

Technical parameters of LFZB1 series high-voltage current transformer

Rated insulation level: 12/42/75KV
Power factor of load 2: COS Φ=0.8 (lagging)
Rated secondary current: 5A or 1A
Surface creepage distance: 280mm
The partial discharge level meets the GB1208-2006 standard for current transformers
The rated primary current, accuracy level combination, rated output, and rated dynamic and thermal stability current are shown in the table below

LFZB1 series high-voltage current transformer