MANUFACTURER PROFILE

Shanghai Huarun Special Transformer

Isolation and autotransformer equipment, with industrial UPS bypass assemblies from Shanghai.

Shanghai Huarun’s published equipment is oriented toward electrical conversion, isolation and power-supply assemblies. Its transformer catalogue distinguishes isolation designs from autotransformers, while a separate PLG-ZJ product page describes an industrial UPS bypass system. For a buyer, the useful starting point is the required electrical function: voltage conversion alone, separated input and output windings, or a complete bypass assembly.

Location: Shanghai
Isolation / autotransformer catalogue: 10–2,000 kVA; separate families
PLG-ZJ catalogue: 10–40 kVA industrial UPS bypass assembly
Production-base address: No. 19, Lane 3715, Huqingping Highway
Sales office: Hexuan Road Wanda office building

Isolation and autotransformers answer different requirements

Scroll sideways to compare all columns.

Requirement	Relevant published family	Clarify before quotation
Separate input and output windings	SGB / DGB isolation equipment; SDB label for phase conversion	Phase arrangement, required separation and the proposed connection scheme
Voltage conversion with a shared winding	SZB / DZB autotransformer equipment	Fixed or adjustable ratio and the permitted connection arrangement
Industrial UPS bypass supply	PLG-ZJ assembly	Complete bypass topology and the transformer/control components included

The isolation-transformer page identifies SGB three-phase, DGB single-phase and SDB three-phase-to-single-phase labels. It describes separate input and output windings and a published production range of 10–2,000 kVA. The autotransformer page identifies SZB three-phase and DZB single-phase designs, with a shared winding and fixed or adjustable ratios, also at 10–2,000 kVA.

Those matching capacity spans do not make the two families interchangeable. If the installation requires winding separation, state that requirement explicitly rather than requesting only an input/output voltage ratio. For either family, include phase arrangement, frequency, continuous duty and the proposed installation conditions. Ask for the connection arrangement and protection requirements in the offered design.

References: [1] [2]

The PLG-ZJ offer is an assembly, not a bare transformer

The PLG-ZJ page describes a bypass cabinet for industrial UPS installations in power plants, petrochemical facilities and other large industrial applications. Its published capacity range is 10–40 kVA. The described system includes isolation, compensation and voltage-regulating transformers alongside a drive mechanism, brush-contact system, controls and optional configurations.

Compare that proposal as a complete assembly. Define the UPS interfaces, normal and bypass supply arrangements, control requirements and installation boundary. A 10–40 kVA bypass-cabinet range should not be confused with the much broader isolation-transformer range. Likewise, a quotation for a transformer alone should not be assumed to include the bypass controls and switching-related equipment.

The PLG-ZJ description specifies microcomputer digital control, membrane touch-key operation and a backlit LCD display. These are concrete control-interface details to discuss with the UPS system integrator. Ask how the bypass cabinet reports status, how operators perform an agreed changeover procedure and which interfaces form part of the proposed system. Do not assume a bare isolation transformer includes those cabinet controls.

References: [3]

Distinguish the production base from the sales centre

The contact page names Shanghai Huarun Special Transformer Complete Equipment as the manufacturer and Shanghai Hualaide Power Supply as the sales centre. It publishes a sales-centre address at the Wanda office building on Hexuan Road and a production-base address at No. 19, Lane 3715, Huqingping Highway. For a factory inspection, agree the production-base location rather than assuming the sales-office address is the manufacturing site.

Manufacturer: 上海华润特种变压器成套有限公司
Sales centre: 上海华来德电源有限公司
Production-base location: No. 19, Lane 3715, Huqingping Highway
Sales-office location: Wanda office building, Hexuan Road

References: [4]

Request documents for the configuration being purchased

The catalogue also has medical and international-certification headings. If those requirements apply to your project, request the document number, covered product and configuration, applicable standard and validity information for the proposed equipment. A heading alone does not define approval scope. The same order-specific approach applies to losses, impedance and winding material: ask for the offered configuration’s schedule rather than transferring values from a different power-supply assembly.

References: [1] [2] [3] [4]

EXISTING CATALOGUE RECORDS

Explore the product detail

Use each product record to review the published configuration, then request the proposed specification for your project.

Huarun SGB / DGB isolation transformer series

SGB / DGB / SDB

Product documents

Manufacturer catalogue source review

View related product

Checked 2026-09-23

BEFORE YOU REQUEST A QUOTATION

A project brief the factory can respond to

Use this list to prepare your requirements. Checking an item only marks your preparation on this page.

0 of 5 items prepared

Identify isolation, autotransformer voltage conversion or a complete UPS bypass assembly.Specify input/output voltages, phase arrangement, frequency and duty.State any required winding separation and medical or destination-specific documentation.For PLG-ZJ, identify the UPS interfaces, controls and assembly components included.Request the proposed configuration’s losses, impedance, winding material and acceptance documents.

Prepare an RFQ for HUARUN

Questions buyers ask

Do both transformer families provide separate input and output windings?

No. The isolation page describes separated windings; the autotransformer page describes a shared winding. Define the electrical function before comparing them.

Is 2,000 kVA the stated upper rating for PLG-ZJ?

No. The 10–2,000 kVA statement belongs to the isolation and autotransformer pages. The inspected PLG-ZJ page states 10–40 kVA.

Where should a production inspection take place?

The contact page separates the sales office from the production base at No. 19, Lane 3715, Huqingping Highway. Confirm the visit and the relevant production area with the order.

Sources

4 sources · checked 8 October 2026

Prepared by PowerTransformerB2B. Checked 8 October 2026. The sources below identify the published company information and any dated public records used for this profile.

Company catalogues describe product families and options. Before you order, ask the manufacturer for the type-test report and acceptance documents for your exact model and rating.

[1] Isolation-transformer product descriptionHuarun Electric · Manufacturer catalogue
[2] Autotransformer product descriptionHuarun Electric · Manufacturer catalogue
[3] PLG-ZJ industrial UPS bypass descriptionHuarun Electric · Manufacturer catalogue
[4] Manufacturer, sales-centre and production-base contact detailsHuarun Electric · Manufacturer contact information