变压器(BCT出线）支付起站终站的盒子

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