Other Transformer Components

Red Type-E epoxy resin transformer bushing
Transformer accessories

Transformer Accessories & Components

Other transformer components for distribution transformers, pad-mounted equipment, and cable connection systems. Specify the required voltage class, current rating, mounting interface, and service duty before ordering.

Transformer accessory range

Transformer Accessories

Select accessories by voltage class, current rating, equipment interface, and installation duty.

Product data

15/25kV 200A loadbreak elbow connectors

15/25kV, 200A separable connectors for pad-mounted transformers and switchgear. Specify cable insulation O.D., conductor size, mating interface, and test-point option.

Review itemConfirmed scope or customization
Catalog modelsSZT-15/200 / SZT-25/200
Rated voltage and current15kV / 25kV, 200A
Test-point configurations200A with test point / 210A without test point
Cable insulation O.D.16.6 – 25.1 mm
Compression-lug conductor range25 – 150 mm² copper or aluminum
Typical equipment interfaceTransformer and pad-mounted equipment cable connection
Order inputsCable construction, conductor size, insulation O.D., mating interface, and test-point requirement
Product data

Epoxy resin bushings

Epoxy resin bushings for transformer and cable branch-box interfaces. Match the 10kV Butt-Joint or 35kV Type-E arrangement to the mounting face, terminal, current path, and seal.

Reference configuration

10kV Butt-Joint reference configuration

Through-interface epoxy-resin bushing reference for a 10kV cable branch-box or equipment joint.

Review itemConfirmed scope or customization
Reference voltage class10kV
Reference terminalM16 shown in the extracted drawing
Reference mounting pattern4 × Ø11.0 mounting holes on a Ø99.0 pattern
Reference interface dimensionsØ125 outer flange; Ø70 tank-wall opening (71 mm noted in the drawing); Ø56 / Ø46 / Ø30 stepped diameters
Reference vertical dimensions245 mm overall reference; 130 mm and 27.5 mm dimensions shown in the drawing
Catalog product-series options12kV / 24kV / 35kV; 630A / 1250A; epoxy resin thermal class F (155°C)
Final releaseCustomizable to the approved equipment mounting, sealing, and current-path drawing
10kV Butt-Joint reference configuration engineering drawing
Direct crop from the supplied selection-manual engineering drawing. Confirm the full approved dimensional package before production release.
Reference configuration

35kV Type-E reference configuration

Type-E epoxy-resin bushing reference for an insulated conductor passage and sealed equipment interface.

Review itemConfirmed scope or customization
Reference voltage class35kV
Reference terminalsM16 terminals shown in the extracted drawing
Reference outer and body diametersØ135 outer flange; Ø89 and Ø76 body dimensions shown in the drawing
Reference vertical dimensions280 mm and 119 mm dimensions shown in the drawing
Reference section details20 mm, 53 mm, 41 mm, and 2 mm dimensions shown in the drawing
Insulation bodyEpoxy resin
Final releaseCustomizable current path, sealing, mounting face, terminal arrangement, and approved drawing
35kV Type-E reference configuration engineering drawing
Direct crop from the supplied selection-manual engineering drawing. Confirm the full approved dimensional package before production release.
Product data

Transformer insulation materials

Electrical insulation materials for transformer windings, interlayers, leads, and conductor wraps. Select the material construction, thermal performance, dielectric duty, and supply form for the transformer design.

Review itemConfirmed scope or customization
Material-family coverageFlexible insulation material; Flexible composite insulation material; Polyester non-woven flexible composite insulation material; Crepe paper tube; Pre-impregnated adhesive insulation material
Applicable product-category terminologyCombined flexible materials for electrical insulation
Category standards for reviewGB/T 5591.1-2017 and GB/T 5591.2-2017; confirm the selected material’s applicable compliance
Material construction and modelCustomizable — select the exact material data sheet
Thickness, width, and supply formatCustomizable — model-specific
Thermal, dielectric, mechanical, and oil-compatibility dataCustomizable — model-specific test report required
Winding / lead application and delivery conditionCustomizable — match the transformer process and approved material data sheet
Product data

OMB magnetic interrupters

Self-resetting magnetic interrupters for overcurrent and oil-temperature protection on oil-filled distribution transformers. Match the phase arrangement and trip duty to the protection scheme.

Review itemConfirmed scope or customization
Protection functionSelf-recovering magnetic trip protection for overcurrent and oil-temperature conditions
Phase arrangementsOne-phase / two-phase / three-phase catalog arrangements
Rated voltage23kV
AC withstand (1 min)55kV
Basic impulse level150kV
Rated current65A / 12kV
Interrupting current (sym.)2100A / 12kV; 500A / 23kV
HousingUV-stabilized, high-strength glass-filled thermoplastic
Operation life>1000 mechanical cycles; >400 rated load switching operations
Project coordinationCustomizable phase arrangement, accessory set, installation, and protection coordination
Product data

Transformer drain valves

Transformer drain and sampling valves for oil filling, draining, and fluid sampling. Specify valve size, tank connection, pressure duty, sealing material, and corrosion resistance.

Review itemConfirmed scope or customization
Primary functionCoolant sampling, filling, and draining
Available valve sizes1 in. / 2 in.
Pressure rating200 lb. WOG
Valve-body materialBrass; stainless steel option
Stem, disc, handle, chain, stuffing nut, and drain fittingBrass catalog construction; final material selection customizable
Seal materialViton gaskets / O-rings for insulating-fluid compatibility
Sampler configurationIntegral 3/8 in. sampler option
Tank interfaceThread, connection face, sampler arrangement, and corrosion-resistance requirement customizable
Release checkConfirm tank connection, coolant compatibility, final material, and approved valve configuration
Application Coverage

Application Areas

The product families above support three distinct duties in distribution transformers and associated equipment. Expand an application to open the relevant product data.

Transformer Accessories Technical FAQ

Use the selected product data with the transformer terminal drawing and protection requirements. Confirm project-specific ratings, dimensions, materials, and drawing revisions before release.

What information is needed to select a transformer bushing or cable connection?

Provide the transformer terminal drawing, conductor or cable connection, mounting dimensions, required voltage and current, available clearances, and the applicable sealing or environmental requirements.

How should magnetic interrupter protection be specified?

State the transformer protection function, phase arrangement, voltage class, interruption duty, current rating, and required installation arrangement. Confirm the final protection coordination against the project scheme.

What is needed for transformer insulation-material selection?

Specify the winding or lead application, thermal class, dielectric duty, oil compatibility, thickness or supply format, and the required test or acceptance documentation.

How do I specify a transformer drain or sampling valve?

State the tank connection or thread, valve size, pressure duty, insulating-fluid compatibility, sampling requirement, material and sealing preference, and installation orientation.

Request a Transformer Accessory Review

Send the relevant drawing, service duty, and ratings for the selected bushing, connector, protection, insulation, or oil-service component. We will review the project inputs against the requested configuration.

Include with your inquiry

  • Terminal or tank-interface drawing
  • Voltage, current, and insulation level
  • Connection, mounting, and clearance
  • Protection or service duty
  • Quantity, documents, and destination
  • Part number, nameplate, or site photos
Send Technical Requirements

Request a configuration review

Tell us the equipment interface, application, required rating, mounting arrangement, quantity, and available project documentation.

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