LZZBJ9-12 current transformer is a cast type 10kV-12kV current transformer, belonging to the pillar type dry type current transformer. It is suitable for indoor installation and can be used as a measuring and measuring current transformer. This webpage mainly introduces the transformation ratio, wiring diagram, parameters, magnification, and model meaning of LZZBJ9-12 current transformer. The current ratio (transformation ratio) is: 5-50/5, 1; 75-200/5, 1; 300-600/5, 1; 800-2500/5, 1; Accuracy level: 0.2 (S), 0.5, 10P15; The working voltage is 12kV;
LZZBJ9-12 current transformer is a pillar type epoxy resin cast insulated indoor full condition product, suitable for current and energy measurement and relay protection in mid mounted switchgear or other types of switchgear, in power systems with rated frequency of 50Hz and rated voltage of 10kV and below. This type of current transformer is a fully enclosed pillar structure cast with epoxy resin, which is resistant to pollution and moisture. Tighten the screw once during installation to ensure reliable contact.
Like any transformer, a current transformer has a primary winding, core, and secondary winding, although some transformers (including current transformers) use an air core. In principle, the only difference between current transformers and voltage transformers (regular type) is that the former is powered by a "constant" current, while the latter is powered by a "constant" voltage, where "constant" has strict circuit theoretical significance.
The wiring method of the current transformer is determined according to the operating requirements of the load it is connected to. The most commonly used wiring methods are single-phase, three-phase star, and incomplete star.
First letter: L - Current Transformer
Second letter: A - Wall through style; Z-pillar type; M - busbar type; D - Single turn through type; V-inverted structure; J-Zero sequence
Used for grounding detection; W - Anti pollution; R-winding exposed type
Third letter: Z - epoxy resin casting type; C - Ceramic insulation; Q - Gas insulation medium; W - Dedicated to microcomputer protection
Fourth letter: B - with protection level; C - Differential protection; D-D level; Q-reinforced type; J-reinforced ZG
Fifth digit: voltage level, product serial number
