GB Transformer Bushing Full Range: BF / BJL / BJLW / BD / BDW, 1~20kV, 50~7000A, 69 Specifications at a Glance

Product Overview

This page presents the full range of XD GB transformer bushings: five series, 69 specifications. ① BF series (1kV, 300~7000A) low-voltage big-current bushings with three tail connections — screw-nut connection, T-shaped connection and plate connection — 34 specifications in total; ② BJL / BJLW series (10~20kV, 50~1200A) presser-foot bushings, 21 specifications, plus 8 high-altitude versions; ③ BD / BDW series (10/20kV, 300~600A) outdoor porcelain bushings, 6 specifications.

Structure & accessories: for the BF series, the under-oil porcelain part can be made of epoxy resin on request; the gland can be made of high-strength aluminium in red / yellow / green / black, printed with marks a, b, c and o. For the BJL/BJLW series, the d3 section of the conductive rod can be freely adjusted to customer demand, the lead connection can be changed from welding to cold-pressing, and four presser-foot styles are available: platen, hot-dip galvanized, butterfly and colored. Standard sealing material is nitrile rubber or acrylic rubber; fluorine rubber is available on request.

Terminals & openings: 300A terminal block 4-Φ10.5; 400~600A terminal block 4-Φ12.5; above 800A, 4-Φ14.5; above 4000A, heavy 2-Φ18 terminals. Tank-cover cutouts (10#10 square-steel mounting face) and spot-weld screw holes 3-M12×55 / 4-M12×55 are matched per the tables. All dimensions are for conventional products; non-standard designs can be customized to customer drawings.

Model naming: series code - voltage / current (e.g. BF-1/3150, BJL-20/275, BDW-20/600). Code formats: XD.DYTG.0xx (BF series), XD.GYTG.CL.x.xx (BJL/BJLW series), XD.current.voltage.model (BD/BDW series).

Models & Specifications

Table 1 | BF-1kV tail screw-nut connection bushings (300~1200A, 6 specifications)

※ The 300~600A ratings use top terminals only — columns B/b/t are blank in the original catalogue; 800A and above use 80×40 plate terminals.

Table 2 | BF-1kV tail T-shaped connection big-current bushings (1600~7000A, 13 specifications)

※ 1600/2000/3150/4000A each have two rows (short type H≈360~427 and tall type H≈365~492) as printed in the original catalogue. In the scan, some Md entries look like Φ (e.g. Φ52*2.0); per the column header Md they are interpreted as M threads.

Table 3 | BF-1kV tail plate connection bushings (300~7000A, 15 specifications)

※ For 300~600A the B/b columns are blank in the original catalogue; for 1600A and above, h3 = 105/135 is the under-tank tail plate length. Tank-cover cutout 4-M12×61.75 and plate terminals 4-Φ14.5 / 2-Φ18 are matched per drawings.

Table 4 | BJL-10/20kV presser-foot bushings (50~315A, 12 specifications)

※ The 20kV group comes in two heights (385 / 445) as printed in the catalogue. Lid opening Φ116±0.5 / Φ70; spot-weld screws 3-M12×55 (120° distributed) or 4-M12×55. Presser feet: platen / hot-dip galvanized / butterfly / colored (red, yellow, green).

Table 5 | BJLW-20kV presser-foot bushings (50~1200A, 9 specifications)

※ 50~600A use the Φ127 clamp plate (4-M12×55); 800~1200A use the Φ170 clamp plate (6-M12×65) with tank-cover cutout Φ105. 800A+ terminals: 80×40 plate, 4-Φ14.5. 3L2S / 4L3S = number of large / small sheds.

Table 6 | BJL-20kV high-altitude bushings (100~400A, 8 specifications)

※ High-altitude version: larger sheds (d1=125) and deeper h2 (385/475), creepage 570mm; two height groups (490/515 and 580/605).

Table 7 | BD-10kV / BDW-20kV outdoor bushings (300~600A, 6 specifications)

※ BD-10kV uses the 300A terminal block (4-Φ10.5, 50×25); BDW-20kV uses the 400~600A terminal block (4-Φ12.5, 55×30). Lid opening Φ116±0.5 / Φ70; spot-weld screws 3-M12×55; clamp plate Φ127 / 4-M12×55.

Typical Applications

Why XD

GB bushings are produced in-house by Tianjin Xingda (XD): five series and 69 specifications with complete tooling and stable supply. The BF series covers up to 7000A at 1kV with all three tail connections; the conductor-rod d3 section, the lead connection (welding / cold-pressing), the presser-foot style and color are all customizable, and the under-oil porcelain part can be replaced with epoxy resin. This series is produced in the same factory as the ANSI, NBR, DIN, EN, flanged and epoxy bushing lines, so all HV and LV bushings for distribution and power transformers can be sourced in one order. Presser feet, gaskets and tank-opening parameters are supplied with each bushing for direct assembly.