ANSI Bushing

Beginner‑Friendly Guide To ANSI High‑Voltage Porcelain Transformer Bushing

Beginner‑Friendly Guide To ANSI High‑Voltage Porcelain Transformer Bushing

INQUIRY

Beginner‑Friendly Guide To ANSI High‑Voltage Porcelain Transformer Bushing

Basic Overview

Ansi bushing is the standardized insulating hardware designed to meet american national standard codes for oil‑filled power transformers. This specialized ansi transformer bushing forms the insulated passage that lets charged metal terminals pass through sealed transformer metal tanks. The hard glazed‑porcelain main body provides powerful insulation, separating live internal transformer wiring and the grounded metal transformer shell. The mainstream 55a ansi bushing product series supports rated‑voltage options covering 15kv 18kv 25kv and 34kv. Customers choose single‑hole or double‑hole metal terminals, alongside varied umbrella‑layer quantities to adjust creepage distance. Every dimension parameter complies with unified ansi industry standards, guaranteeing interchangeability during transformer maintenance. As one core transformer accessory, ansi porcelain bushing ensures safe and steady daily‑running for all types of oil‑immersed high‑voltage transformer equipment.

Introduction Core Features Advantages and Application Scenarios

porcelain bushing has multiple practical structural features built for power‑grid operating circumstances. Its multi‑layer umbrella‑shaped porcelain surface lengthens the surface creepage path and greatly reduces surface flash‑over risks caused by dirt, dew and airborne industrial waste. All metal connecting components receive anti‑corrosion surface treatment to resist rust during long‑time outdoor deployment. Standardized measurements make replacement‑work simple for maintenance technicians.Key competitive strengths of ansi bushing are outstanding mechanical shock resistance, consistent high‑voltage insulation performance, flexible terminal‑wiring selections, affordable operating costs and wide temperature adaptability. Operators can select 4‑umbrella up to 17‑umbrella designs for light‑pollution and heavy‑pollution working locations.The broad application scope of ansi transformer bushing covers town‑area distribution transformers, factory heavy‑duty power transformers, mining‑site power‑supply transformers, temporary construction‑site power transformers and backup‑power transformer machinery for large‑scale commercial facilities. Transformer assembly factories, electrical‑parts distributors and power‑grid maintenance teams regularly purchase ansi‑standard bushings for equipment‑building and repair‑related assignments.

Technical Parameter Table

表格

S N	Model	Shield	H	h1	h2	n*Ød	Ød1	B	Creep distance
1	ANSI‑15KV‑55A‑single hole	4‑umbrella	380	156	184	1*14.3	101	31.8	279.4
2	ANSI‑18KV‑55A‑single hole	7‑umbrella	437.5	213	184	1*14.3	101	31.8	450.85
3	ANSI‑25KV‑55A‑single hole	8‑umbrella	490	266	184	1*14.3	99	31.8	523
4	ANSI‑25KV‑55A‑single hole	10‑umbrella	495	270	184	1*14.3	101	31.8	775
5	ANSI‑34KV‑55A‑single hole	11‑umbrella	567.5	344	184	1*14.3	107	31.8	774.7
6	ANSI‑34KV‑55A‑single hole	15‑umbrella	780	458	280	1*14.3	105	31.8	1114
7	ANSI‑34KV‑55A‑single hole	17‑umbrella	792	505	248	1*14.3	106	31.8	991
8	ANSI‑15KV‑55A‑double hole	4‑umbrella	380	156	184	2*14.3	101	76.2	279.4
9	ANSI‑18KV‑55A‑double hole	7‑umbrella	437.5	213	184	2*14.3	101	76.2	450.85
10	ANSI‑25KV‑55A‑double hole	8‑umbrella	490	266	184	2*14.3	99	76.2	523
11	ANSI‑25KV‑55A‑double hole	10‑umbrella	495	270	184	2*14.3	101	76.2	775
12	ANSI‑34KV‑55A‑double hole	11‑umbrella	567.5	344	184	2*14.3	107	76.2	774.7
13	ANSI‑34KV‑55A‑double hole	15‑umbrella	780	458	280	2*14.3	105	76.2	1114
14	ANSI‑34KV‑55A‑double hole	17‑umbrella	792	505	248	2*14.3	106	76.2	991

Frequently Asked Questions

Q1 Are cracks on ansi bushing porcelain shell very dangerous

A1 Even tiny porcelain cracks create major safety risks. Moisture will seep inside and trigger insulation breakdown. You need to replace cracked ansi transformer bushing straight away.

Q2 Can ansi bushing withstand frequent transformer‑switching surges

A2 Well‑produced ansi porcelain bushing is engineered to tolerate regular electric surges during transformer startup and shutdown under standard operating conditions.

Q3 What tools are needed to mount ansi bushing

A3 Prepare torque spanners, sealing gaskets, insulating gloves and basic measuring tools. Certified electrical workers must complete the whole installation workflow.

Q4 Why do ansi bushing models have different overall‑height measurements

A4 Taller bushing configurations carry extra umbrella layers, extending creepage distance for high‑voltage 34kv‑grade transformer equipment.

Q5 Is routine inspection necessary for indoor‑installed ansi bushing

A5 Indoor‑placed bushings still require periodic examination. Dust accumulation, gasket aging and loose mounting nuts can bring on unexpected equipment breakdown.