Трансформатор (BCT из линии) крышку клеммной коробки

Transformer(BCT out line)cover of terminal box(current and voltage mutual inductor terminal box) 1)New skills,new workmanship and new materials. 2)The shell is formed by aluminum alloy die-casting. 3)Structure:two parts,namely CT terminal board and the shell. 4)Good looking and light weight. 5)Number of terminals:1 32. 6)Got national patent,various specification made as per customers' special requests. 7)Have passed ISO9001:2000 quality management system and approved other many certifications. Type introduction: Example:BCT3-12/a(1-Φ190 2-Φ206 3-Φ246 4-Φ264)12-12 terminals(a-single outlet hole b-double outlet holes)Physical and mechanical propertiesItem Standard Unit Index Eigenvalue CT board impact strength GB1043 KJ/M2 ≥10 8 14 CT board bending strength GB1043 KJ/M2 ≥110 100 130 CT board heat distortion temperature TGA °C ≥200 150 CT board wire expansion coefficient TMA K-1 30×10-6 30 35×10-6 Copper plugin expansion coefficient TMA K-1 26×10-6 25 32×10-6 Copper plugin copper nut surface GB6170 um ≥15 Nickel Plated Shell strength OS:617749 N-M ≥80 No fault and crack Shell surface CTC859810 um ≥140 painted 140um Steel bolt GB5783 um ≥20 Chromium Plated Electrical properties Item Standard Unit Index Eigenvalue Breakdown with standard voltage GB1408 KV/mm ≥20 10 20 Insulation resistance GB1410 MΩ ≥1000 ≥500 Surface resistivity GB1410 MΩ >106 106 Sealing properties Item Standard Unit Result Requirement 0.5MPa GB1094 2h no leakage no leakage 10N•M torque GB1043 5 times no leakage no crack -40°C 105°C cold and hot circulation TMA 3 times no leakage no change tgδ test GB1094 % <2.0 ≤2.8 Covered with transformer GB1094 168h 105°C no change no change