High-Current Transformer Bushings at a Glance: Ten Series, About 100 Models from 10 kV to 40 kV (100A–3150A)

Overview

This page brings together the complete Xingda bushing range for 10 kV to 40 kV systems, covering nine series — BD, BDW, BD.T (draw-lead), BJ, BJW, BJL, BJLW, BJLW01 and the wind/PV flanged BFW — with about 99 standard models. Rated currents run from 100 A up to 3150 A, making this the workhorse line for transformer LV/HV line entries. All models are porcelain-insulated and supplied complete with mounting accessories (platen, presser foot, gasket and welding studs) matched to standard tank-cover openings of Φ105, Φ140 and Φ150 mm.

The model code is self-explanatory: BD = 10 kV class; BDW = 20 kV class with reinforced outdoor insulation (W); BJ / BJW = 35 kV standard / outdoor-heavy type; BJL = 35 kV with detachable terminal (cold-compression lug); BJLW = 35 kV extended-creepage outdoor type; 40 kV models are coded BJW-40 / BJLW-40. A suffix T marks draw-lead construction (cable passes through the center tube), and suffixes .A / 01 mark reinforced versions with larger sheds and longer creepage distance. Customers can lock in a model using just three parameters: system voltage, rated current and mounting hole.

Model & Specification Tables

Table 1 | BD-10 kV / 800–3150 A (3 large sheds, creepage 320 mm)

Table 2 | BDW-20 kV / 800–3150 A (creepage 550 mm; reinforced .A version 744 mm)

Table 3 | BD-10 kV / BDW-20 kV draw-lead type (T, 800–3150 A)

Table 4 | BJ-35 kV & BJW-35 kV / 300–3150 A (creepage 650 / 900 mm)

Table 5 | BJL-35 kV / 100–600 A (three shed groups: 7 / 9 / 11 sheds)

Note: h2/h3 figures in Table 5 rows 1–4 were read from a scanned page; please verify against CAD drawings before quoting.

Table 6 | BJW-40 kV / 300–3150 A (creepage 1380 mm; reinforced BJWA 1550 mm)

Table 7 | BJL-35 kV & BJLW-35 kV / 100–1200 A (detachable terminal type)

Table 8 | BJLW-40 kV / 100–1200 A (creepage 1380 mm; reinforced 01 version 1550 mm)

Table 9 | Wind/PV flanged bushing BFW-40.5 kV / 100 A (to GB/T4109-2008)

Mounting & Accessories

Every series is designed around standard tank-cover openings: Φ105 mm with 6–12 spot-welded M12×65 studs for the 10/20 kV and BJL/BJLW families, and Φ150 mm for the BJ/BJW 35 kV family. Terminal threads grow with current — from M12×1.75 (100–300 A) up to M48×2.0 (3150 A) — and all 2000 A+ models use a 4-hole flat terminal pad (B1 = 80, B2 = 85 mm). Hot-dip galvanized presser feet and aluminium platens are supplied with the BJL/BJLW series. Standard gasket material is nitrile or acrylate rubber; fluorine rubber is available on request.

Typical Applications

Why Xingda

All nine series are produced in-house by Tianjin Xingda with complete tooling; standard models are available from stock. Dimensions listed are for conventional products — custom sheds, extended heights and special tank openings can be made to customer drawings. One factory supplies both the ANSI export range and this GB-coded range, so transformer manufacturers can outfit domestic and export units from a single purchase. Every bushing ships with platen, presser foot, gasket and mounting studs ready to bolt onto the tank cover.