Transformer Accessories Series

Low Voltage Bushings for Distribution Transformers

High-performance secondary bushings designed for reliable current transfer. Available in HTN (High Temperature Nylon), Porous Resin, and Porcelain options, featuring multiple terminal configurations for utility and industrial distribution transformers.

High-Current Stability • Flexible Terminal Options • International Export Support
Request Quote View Specifications
Voltage Class 1.2 kV – 3.0 kV
Current Rating 600A – 5000A+
Insulation Material HTN / Resin / Epoxy
Product Definition

What Is a Low Voltage Transformer Bushing?

A low voltage bushing is a critical insulation component designed to facilitate high-current transfer from a transformer’s internal secondary windings to external systems. Our solutions utilize advanced HTN (High Temperature Nylon) and Porous Resin technologies to ensure thermal stability and leak-proof performance in demanding utility environments.

  • 01
    High Current Flow — Supports secondary side currents from 600A up to 5000A+ via optimized copper conductors.
  • 02
    Advanced Insulation — Employs Zytel® HTN or Porous Resin for superior mechanical strength and low moisture absorption.
  • 03
    Superior Sealing — Features tri-clamp or pressure plate mounting with resilient Buna-N gaskets for zero-leakage reliability.
ZeeyiElec specializes in HTN-molded and resin-dry bushings, providing drop-in replacements for standard OEM configurations.
Conventional Route
External Busbar / Cable
Terminal Threaded Stud
Insulation Porcelain Body
Mounting DIN / Standard Flange
Best for standard distribution projects with traditional requirements.
High-Performance Route
External High-Amp Palm/Spade
Terminal Spade / Plate Conn.
Insulation HTN / Porous Resin
Mounting Tri-Clamp / Plate
Optimized for high-current, low-profile, and humid environments.
Engineering Series

Product Family Overview

ZeeyiElec provides comprehensive low voltage bushing solutions categorized by insulation material and standard compliance.

REF: 3BE3-SERIES Series A
ZeeyiElec 1.2kV plastic HTN molded tri-clamp secondary bushing

Plastic Bushings

HTN Molded Tri-Clamp Type
Voltage Class1.2 kV
Current Rating600A / 1200A
MaterialZytel® HTN
MountingTri-clamp (3-Bolt)
Request Quote Specifications
REF: ANSI-STD-02 Series B
ANSI standard porcelain low voltage transformer bushing

ANSI Porcelain

American Standard Series
Voltage Class1.2 kV – 2.5 kV
Max Current6500 A
StandardIEEE / ANSI C57
TerminalsSpade / Stud / Palm
Request Quote Specifications
REF: DIN-42530 Series C
DIN standard wafer type porcelain low voltage bushing

DIN Porcelain

European Wafer Type
Voltage Range1.0 kV – 3.0 kV
Current Range315A – 6300A
ConfigurationWafer Type
SealingFull Ring Protection
Request Quote Specifications
REF: RESIN-DRY Series D
Porous resin dry type epoxy low voltage bushing

Epoxy Bushings

Resin Dry Type
MaterialPorous Resin / Epoxy
Max Current6500 A
FeatureLeak-Proof Dry Type
InterfaceFully Customizable
Request Quote Specifications
Engineering Specifications

Low Voltage Bushing Specifications by Family

Review key electrical, mechanical, and interface parameters across Plastic, ANSI Porcelain, DIN Porcelain, and Epoxy low voltage bushing families. Final dimensions and terminal details can be customized based on transformer design and project standards.

FamilyPlastic Bushings
Typical ApplicationTransformer LV secondary pass-through
Voltage Class1.2 kV
Current Rating600A / 1200A
Withstand (1 min)10 kV
Lightning Impulse (BIL)30 kV
Insulation MaterialHTN molded insulation body (Zytel®)
Conductor InterfaceCopper stud (5/8″ or 1″)
Mounting PatternTri-clamp (3-bolt pattern)
Sealing StructureGasket included (Buna-N)
Standard ReferenceANSI / IEEE C57.12.00
Typical Model3BE3-600-1.2 / 3BE3-1200-1.2
FamilyANSI Porcelain Bushings
Typical ApplicationANSI transformer LV terminals
Voltage Class1.2 kV / 2.5 kV
Current Range63A – 6500A
Withstand (1 min)10 kV (1.2kV class) / 15 kV (2.5kV class)
Lightning Impulse (BIL)30 kV / 45 kV
Creepage Distance55 mm / 70 mm (typical)
Insulation MaterialC-110 High-grade wet process porcelain
Conductor InterfaceSpade / Stud / Palm-hole variants
Mounting PatternThreaded / bolt interface
Standard ReferenceANSI / IEEE system context
FamilyDIN Porcelain Bushings
Typical ApplicationDIN-style distribution transformer terminals
Voltage Class1.2 kV – 3.0 kV
Current Range315A – 6300A
ConfigurationWafer type
Connection TypesScrew connected / T-type connected
Sealing StructureFull sealing ring protection
Shield OptionSingle shield / 2 shields (by model)
Mounting PatternPlate / screw route
Series ReferencesBF / BFJ type references
Standard ReferenceDIN 42530
FamilyEpoxy Bushings (Resin Dry)
Typical ApplicationCompact transformer LV outlet interfaces
Voltage ClassProject-dependent LV class
Current RangeUp to 6500A (series dependent)
Insulation MaterialEpoxy / Porous resin dry type
Mechanical CharacteristicHigh structural strength
Moisture CharacteristicSuperior moisture resistance (low absorption)
Sealing BehaviorDry-type, no oil-side porcelain body dependency
Maintenance StatementLow maintenance / Long-term stability
InterfaceConfigurable terminal and mounting by project
Typical ModelLEB Series (Porous)
  • Values shown are engineering reference ranges for pre-selection and inquiry preparation.
  • Final dimensions, hole patterns, and terminal configurations are confirmed by approved drawings.
  • For retrofit projects, please provide transformer nameplate data, opening dimensions, and connection photos.

Recommended RFQ Inputs

1
Electrical Rating

Required current rating (A) & Voltage class.

2
Material Preference

Plastic / ANSI Porcelain / DIN / Epoxy.

3
Mounting Interface

Opening size & bolt pattern dimensions.

4
Terminal Type

Stud / Spade / Palm / Custom request.

Engineering Capability

Reliable Delivery for Every Project

ZeeyiElec streamlines the low voltage bushing supply chain with precise engineering coordination, from initial selection to final export documentation.

01

Application Matching

We align Plastic, Porcelain, or Epoxy routes directly to your transformer's interface requirements and current demands.

02

Design Verification

Every order includes a review of opening patterns, terminal forms, and mounting details before production begins.

03

Flexible Configuration

Full support for custom stud, spade, or palm options, along with adaptable sealing structures for any tank design.

04

Export Documentation

Comprehensive commercial and technical documentation coordination to ensure smooth international B2B delivery.

Note: Detailed engineering feedback is provided within 24 hours after reviewing your nameplate data and interface dimensions.
Application Scenarios

Where Low Voltage Bushings Are Commonly Applied

ZeeyiElec low voltage bushing families are used across distribution transformer projects with different interface standards, current levels, and service environments. Select the scenario closest to your project for faster engineering alignment.

Utility Distribution Transformers

Typical LV outlet interfaces for public grid distribution transformers requiring stable insulation and reliable current transfer.

  • ANSI / DIN
  • Outdoor Service
  • High Reliability
Recommended Families ANSI Porcelain / DIN Porcelain / Epoxy

Pole & Pad-Mounted Units

Compact transformer platforms where interface layout, sealing integrity, and maintenance access are critical.

  • Compact Envelope
  • Sealing Priority
  • Retrofit-Friendly
Recommended Families Epoxy / ANSI Porcelain

Industrial Power Distribution

Factory and plant transformers with higher load continuity requirements and project-specific terminal configurations.

  • Custom Terminals
  • High Current
  • Heavy Duty
Recommended Families ANSI Porcelain / DIN / Epoxy

Renewable & Auxiliary Systems

Transformer interfaces supporting renewable integration and auxiliary distribution systems with reliability-focused component selection.

  • Grid Integration
  • Documentation
  • Configurable
Recommended Families Epoxy / ANSI Porcelain

Retrofit & Replacement

Replacement cases requiring precise matching of opening dimensions, terminal style, and existing transformer interface constraints.

  • Opening Check
  • Drawing Match
  • Fast Feedback
Recommended Families Plastic / ANSI / DIN / Epoxy

LV Secondary Platforms

Secondary-side applications where compact mounting and cost-effective insulation structures are preferred.

  • Tri-clamp
  • 1.2kV Class
  • 600A/1200A
Recommended Families Plastic (HTN)
Selection Guide

How to Select the Right Low Voltage Transformer Bushing

This low voltage bushing selection guide helps you match application conditions, standard system, current demand, and mounting interface to the right low voltage transformer bushing family. Use this workflow to shortlist ANSI porcelain bushing, DIN porcelain bushing, epoxy bushing, or plastic bushing options before RFQ.

Confirm Application

Identify whether the low voltage bushing is used for utility distribution, industrial transformer output, or retrofit replacement.

Match Standard

Determine if the project follows ANSI or DIN conventions to avoid mismatch between bushing interface and tank design.

Check Electricals

Confirm rated current range and voltage class. Compare withstand values with project requirements before model confirmation.

Choose Family

Shortlist plastic bushing, ANSI porcelain bushing, DIN porcelain bushing, or epoxy bushing based on material preference.

Submit RFQ

Submit nameplate data and opening dimensions. Engineering uses these inputs to finalize the low voltage transformer bushing recommendation.

Which Low Voltage Bushing Family Fits Best?

Plastic Bushing
HTN Series
  • 1.2kV class projects
  • 600A / 1200A needs
  • Tri-clamp mounting
Best fit for compact low voltage bushing secondary outlets.
ANSI Porcelain
American Std
  • ANSI transformer jobs
  • Wide current span
  • Porcelain preference
Common choice for low voltage transformer bushing projects under ANSI.
DIN Porcelain
European Std
  • DIN style interfaces
  • Wafer configuration
  • Screw/T-type routes
Recommended when DIN porcelain bushing geometry is required.
Epoxy Bushing
Resin Dry Type
  • Compact designs
  • Dry-type interface
  • Moisture sensitive
Practical low voltage bushing option for resin-based interfaces.

Low Voltage Bushing RFQ Checklist

Transformer type and application
Required current rating (A)
Preferred family (Plastic / ANSI / DIN / Epoxy)
Tank opening dimensions and bolt pattern
Terminal form (stud / spade / palm / custom)
Quantity and target lead time
Get Engineering Selection Support Review Specifications
Quality & Documentation

Low Voltage Bushing Quality Control and Documentation Support

For each low voltage bushing project, ZeeyiElec aligns material route, interface details, and outgoing inspection with project requirements. Documentation support is provided to help buyers and engineers evaluate low voltage transformer bushing suitability before order release and shipment.

Quality Control Logic

Quality control for each low voltage bushing family follows a practical engineering sequence: material verification, dimensional check, and interface consistency review. For ANSI porcelain bushing and DIN porcelain bushing routes, dimensional tolerances are prioritized. For epoxy bushing and plastic bushing routes, insulation integrity is key.
  • Material and component consistency check
  • Critical dimension and mounting pattern verification
  • Terminal/interface match confirmation
  • Visual inspection before final packing

Documentation Package

To support low voltage transformer bushing procurement and project alignment, ZeeyiElec can provide a documentation package based on project stage and customer requirements. This helps reduce communication cycles and improves engineering handoff efficiency.
  • Technical datasheet (family-level)
  • Dimensional drawing / outline reference
  • Quotation sheet with configuration notes
  • Packing list and commercial invoice
  • Origin-related commercial documents (as requested)
  • Additional project coordination files

Pre-Production Review Inputs

  • Transformer application and voltage class
  • Required current rating
  • Preferred low voltage bushing family
  • Opening dimensions / bolt pattern
  • Terminal form requirement

Pre-Shipment Verification Focus

  • Model-family and quantity consistency
  • Visual condition and marking check
  • Interface/mounting correspondence
  • Packaging protection status
  • Document completeness check

All values and references shown on this page are for engineering pre-selection of low voltage bushing solutions. Final model confirmation is based on approved drawings, project requirements, and order-level technical agreement.

Review specification ranges → Use the selection guide →
FAQ & Resources

Common Questions & Technical References

Clear answers on interface definition, selection boundaries, and compatibility, plus quick access to official standards.

Related Resources

A low voltage bushing is an insulated pass-through component that transfers current from internal transformer windings to external conductors. A low voltage transformer bushing must provide insulation integrity, mechanical stability, and interface compatibility with terminals and mounting structures.
Selection depends on current level, interface standard, mounting pattern, and service environment. Plastic bushing options are common for compact secondary interfaces, while ANSI porcelain bushing, DIN porcelain bushing, and epoxy bushing routes are typically selected for broader current ranges and project-specific transformer interface requirements.
ANSI porcelain bushing and DIN porcelain bushing differ mainly in dimensional conventions, interface geometry, and project standard context. In low voltage bushing selection, standard-system matching is critical to avoid installation mismatch and rework.
Epoxy bushing configurations are often preferred when compact structure, dry-type interface behavior, and stable sealing performance are required. For many low voltage transformer bushing applications, epoxy options provide flexible interface adaptation for modern transformer designs.
No. The low voltage bushing specification values shown are engineering reference ranges for pre-selection and RFQ preparation. Final low voltage transformer bushing configuration is confirmed by approved drawings and project-level technical agreement.
Please provide current rating, voltage class, preferred family (plastic, ANSI porcelain, DIN porcelain, or epoxy), opening dimensions, terminal style, quantity, and destination. These inputs significantly improve transformer bushing selection speed and accuracy.
Yes. For retrofit work, low voltage bushing solutions are typically matched to existing tank openings and interface constraints. Provide old part photos, key dimensions, and terminal details so engineering can evaluate replacement feasibility.
Projects commonly reference ANSI/IEEE context, DIN system context, or IEC/GB project specifications depending on market and transformer platform. The key in low voltage transformer bushing selection is consistency between project standard, dimensions, and interface design.
Yes, documentation support can include technical datasheets, dimensional references, quotation details, packing list, and commercial documents as required by the project stage and destination market.
Engineering response time depends on completeness of your RFQ inputs. In most cases, when current rating, dimensions, and interface requirements are clear, preliminary low voltage bushing family recommendations can be provided efficiently for quotation alignment.