Looking for voltage transformer manufacturers in Yueqing? This guide profiles ten local companies that publish instrument voltage transformers and a Yueqing manufacturing or contact address. The selection covers single-phase and three-phase units, cast-resin and selected oil-immersed designs, indoor and outdoor installations, gas-insulated switchgear and ring-main arrangements, and combined metering equipment.
A voltage transformer is not the same product as a power or distribution transformer. A PT reduces system voltage to a standard secondary voltage for meters, relays and control devices, while a power transformer transfers load power between systems. The enquiry should state the primary and secondary voltage, phase configuration, accuracy class, rated burden, voltage factor, insulation level and installation drawing. Use this guide to build a shortlist, then send every company the same technical schedule.
How this list was selected: Official company, product and contact pages were reviewed on 22 October 2026. The order is a research shortlist, not a quality, price, certification, export or “best” ranking. A published product range or address does not prove that BottomRace has audited every factory or that every model carries every approval. Confirm the legal entity, manufacturing site, exact model, current certificate and test scope before ordering.
Ten Yueqing voltage transformer manufacturers to compare
Start with the installation and the secondary equipment, then use the published product focus to choose a first group of suppliers. The list separates voltage transformers for switchgear and metering from power transformers and low-voltage control transformers.
| Manufacturer | Published location | Published VT focus | Useful first question |
|---|---|---|---|
| Zhejiang Beicheng Electric Co., Ltd. | Xinguang Industrial Zone, Liushi, Yueqing | 10/35 kV dry-type and oil-immersed voltage transformers and metering units | Dry-type or oil-immersed, and which metering arrangement? |
| Nahu Electrical Technology Co., Ltd. | No. 2188 Central Avenue, Liushi, Yueqing | 10–110 kV voltage, current and combined instrument transformers | Which voltage class and single- or three-phase design? |
| Zhikai Electric Technology Co., Ltd. | Shahu Industrial Zone, Liushi, Yueqing | 10–35 kV indoor and outdoor voltage transformers and fused DIN-type units | Standard PT or a fused or withdrawable arrangement? |
| Zhejiang Luoke Electric Power Technology Co., Ltd. | Beibaixiang Industrial Zone, Yueqing | 10–35 kV gas-insulated-switchgear, ring-main and indoor/outdoor VTs | Which gas-tank or switchgear interface? |
| Zhejiang Zhonghu Electric Co., Ltd. | Qiligang Industrial Park, Yueqing | 10–35 kV indoor and outdoor voltage transformers and combined metering units | Single-phase or three-phase, and which metering box? |
| Youxing Electric Co., Ltd. | No. 281 Wei 20th Road, Yueqing Economic Development Zone | Indoor and outdoor single- and three-phase voltage transformers up to 33 kV | Which phase, voltage, burden and installation? |
| Zhejiang Huwang Electric Co., Ltd. | Bingang Park, Jingsan Road, Yueqing Economic Development Zone | 10–35 kV indoor, outdoor, gas-insulated-switchgear and ring-main VTs | Which 10–35 kV installation and secondary winding? |
| Jihu Electric Power Technology Co., Ltd. | Wei 19th Road, Yueqing Economic Development Zone | 10–35 kV gas-insulated-switchgear, indoor, outdoor and combined VTs | Which VT type and switchgear interface? |
| Zhejiang Guoben Electric Power Technology Co., Ltd. | Chanxi Village, Liushi, Yueqing | 3–35 kV indoor and outdoor voltage transformers and metering assemblies | Which voltage class and indoor or outdoor construction? |
| Yueqing Fuyi Switch Co., Ltd. | No. 151 Jingliu Road, Yueqing Economic Development Zone | 10–35 kV voltage transformers and switchgear insulation components | PT only or a matched switchgear insulation assembly? |
Manufacturer profiles and questions to ask
1. Zhejiang Beicheng Electric Co., Ltd.
Short name: Beicheng Electric
Published location: Xinguang Industrial Zone, Liushi, Yueqing
Beicheng Electric publishes separate 10 kV and 35 kV dry-type voltage-transformer categories and oil-immersed current/voltage transformer families. Its published examples include JSZV-10, JDZ and JDZJ types, JDZ18, JDZ10, JDZX10, JDZC and JDZW outdoor units. Combined metering boxes are also listed. This breadth helps a buyer compare an indoor cast-resin PT with an oil-immersed or outdoor arrangement, but the final selection must match the switchgear or metering installation drawing.
Before requesting a quote: State the system voltage, highest voltage for equipment, phase configuration, indoor or outdoor installation and whether the PT is for metering, protection or both. Provide the primary and secondary voltage, accuracy class, rated burden and voltage factor. For an oil-immersed or combined unit, include the tank, fuse, metering and connection arrangement. Request the outline drawing, terminal diagram, nameplate and model-specific test scope.
Official sources: 10 kV dry-type VT range · 35 kV dry-type VT range · contact page.
2. Nahu Electrical Technology Co., Ltd.
Short name: Nahu Electric
Published location: No. 2188 Central Avenue, Liushi, Yueqing
Nahu Electrical Technology publishes current, voltage, combined and integrated instrument transformers from its Liushi base. Its voltage-transformer category lists indoor JSZV, JDZ and JSZW examples, plus an outdoor JDZW unit and several three-phase designs. The company's overview states that it covers 10 kV to 110 kV current and voltage transformers and combined metering equipment. A buyer should confirm the insulation type, the number of phases, the residual-voltage windings and the exact host equipment before treating two similarly named PTs as equivalent.
Before requesting a quote: Provide the rated primary and secondary voltage, system earthing, number of phases, indoor or outdoor location, accuracy class and rated burden. State whether the PT needs a residual-voltage winding, fuses, an anti-resonance arrangement or a three-phase five-limb construction. Add the insulation level and altitude. Request the connection diagram, terminal markings, outline drawing and test report for the exact model.
Official sources: Voltage-transformer range · JSZV12-10R indoor PT · contact page.
3. Zhikai Electric Technology Co., Ltd.
Short name: Zhikai Electric
Published location: Shahu Industrial Zone, Liushi, Yueqing
Zhikai Electric publishes a dedicated 10–35 kV voltage-transformer category with single-phase JDZ and JDZX types, three-phase JSZV types and models such as JDZ12(A)-6/10R and JDZ18-6/10R. Several of those models are described as fully enclosed elbow-type indoor units with fuses. The catalogue also includes JDX9-35 and JDZC examples. This range is relevant when the PT must fit a particular ring-main, switchgear or metering compartment; the model family alone does not establish fuse type, terminal position or mounting clearance.
Before requesting a quote: Identify the switchgear or ring-main model and whether the PT is fixed, withdrawable, elbow-type or mounted on a support. Specify the voltage ratio, phase configuration, accuracy class, burden, voltage factor and residual-voltage winding. Confirm the fuse rating, type and whether it is integrated or supplied separately. Ask for the outline drawing, terminal arrangement, insulation coordination and model-specific type-test evidence.
Official sources: 10–35 kV VT range · JDZ10 voltage-transformer example · contact page.
4. Zhejiang Luoke Electric Power Technology Co., Ltd.
Short name: Luoke Electric
Published location: Beibaixiang Industrial Zone, Yueqing
Luoke Electric publishes voltage transformers for gas-insulated switchgear and ring-main units, plus separate 10–35 kV voltage and outdoor-transformer categories. Its product pages list JDZJ-10(6), JDZC-10(6), JSZF-10(6), JDZ10, JDZX10 and JDZX9 examples. The company says its predecessor was founded in 2010 and was renamed in 2018. A gas-tank PT depends on the host equipment's insulation, mounting and test interface, so buyers should provide the switchgear drawing rather than selecting from a voltage class alone.
Before requesting a quote: Send the switchgear or ring-main model, PT compartment drawing, phase spacing and available terminal position. State the primary and secondary voltages, phase count, accuracy class, burden, voltage factor and residual-voltage requirement. Confirm the insulation type, gas or solid interface, fuse arrangement and applicable partial-discharge test. Request the assembly drawing, secondary wiring and final factory test record.
Official sources: Gas-insulated/ring-main VT range · 10–35 kV VT range · contact page.
5. Zhejiang Zhonghu Electric Co., Ltd.
Short name: Zhonghu Electric
Published location: Qiligang Industrial Park, Yueqing
Zhonghu Electric publishes a voltage-transformer category with JDZ10-10A, JDZX10-10A, JDZ10-10, JDZX10-10, JDZ9-10Q, JDZX9-10Q, JDZW-35 outdoor, JDZ8-10R, JSZVR-10W, JSZY16-10R1, JSZJKF-10R and JSZV18-10R examples. It also offers combined instrument transformers and power-metering boxes. That makes the company relevant where a buyer needs a single-phase PT and a three-phase or combined metering assembly from one source. The quotation should separate the PT, fuse, meter and enclosure scope.
Before requesting a quote: State the primary and secondary voltage, number of phases, accuracy class, burden, voltage factor and required residual-voltage winding. For a combined metering box, send the single-line diagram and list the CT, PT, fuse, meter, terminal and enclosure requirements separately. Confirm the indoor or outdoor rating, mounting dimensions, cable or busbar connection and final routine test plan.
Official sources: Voltage-transformer range · JDZ10-10A PT example · contact page.
6. Youxing Electric Co., Ltd.
Short name: Youxing Electric
Published location: No. 281 Wei 20th Road, Yueqing Economic Development Zone
Youxing Electric publishes a voltage-transformer range that includes single-phase, two-phase and three-phase designs, cast-resin and selected oil-filled constructions, and indoor or outdoor arrangements. Its catalogue shows medium-voltage PT examples up to 33 kV, multiple secondary windings and values such as accuracy class, burden, voltage factor and creepage distance. The company also states that it can customise voltage, winding, terminal and enclosure requirements. Buyers should separate an instrument PT from a low-voltage control or distribution transformer.
Before requesting a quote: Specify the system voltage, rated primary voltage, secondary voltage, number of phases and windings, accuracy class, burden and voltage factor. State indoor or outdoor installation, pollution or humidity conditions, fuse requirement and the mounting envelope. For a custom unit, send the electrical schedule and outline drawing. Ask for the turns-ratio test, polarity check, insulation test and the applicable model-specific report.
Official sources: Voltage-transformer range · 15 kV PT example · contact page.
7. Zhejiang Huwang Electric Co., Ltd.
Short name: Huwang Electric
Published location: Bingang Park, Jingsan Road, Yueqing Economic Development Zone
Huwang Electric publishes indoor and outdoor 10–35 kV voltage transformers, including units for gas-filled cabinets and ring-main equipment. Its English catalogue includes JDZQN, JDZXN and JSZWF examples and separates the voltage-transformer categories by installation. The published address is Building 12, second floor, Bingang Park, Jingsan Road, Yueqing Economic Development Zone. The buyer should confirm the number of secondary windings, residual-voltage output, fuse arrangement and the exact host equipment drawing.
Before requesting a quote: Identify the switchgear, ring-main or outdoor installation and give the phase spacing and mounting position. State the primary and secondary voltage, accuracy class, burden, voltage factor and number of secondary windings. Confirm whether a residual-voltage winding, fuse or surge-protection interface is required. Request the drawing, terminal marking, polarity, insulation test and partial-discharge record where applicable.
Official sources: Indoor 10–35 kV VT range · Gas-insulated/ring-main VT range · contact page.
8. Jihu Electric Power Technology Co., Ltd.
Short name: Jihu Electric
Published location: Wei 19th Road, Yueqing Economic Development Zone
Jihu Electric publishes voltage transformers for 10–35 kV gas-insulated switchgear and ring-main units, plus indoor, outdoor and dry-type combined transformer categories. Its gas-insulated range includes JDZ, JDZX, JDZ12, JDZX16, JSZV, JSZY, JSZF and JSZWF examples. The company gives its address as Wei 19th Road in the Yueqing Economic Development Zone. Buyers comparing these models should check the fuse arrangement, secondary winding count, terminal location and host-compartment dimensions.
Before requesting a quote: Send the host switchgear or ring-main drawing and the required VT position. State the primary voltage, secondary voltage, phase count, accuracy class, burden and voltage factor. Confirm the need for a residual-voltage winding, integrated fuse, surge protection or draw-out mechanism. Ask for the assembly drawing, insulation and partial-discharge requirements, nameplate wording and the production address.
Official sources: Gas-insulated/ring-main VT range · Indoor 10–35 kV VT range · contact page.
9. Zhejiang Guoben Electric Power Technology Co., Ltd.
Short name: Guoben Electric
Published location: Chanxi Village, Liushi, Yueqing
Guoben Electric describes itself as a manufacturer of 0.5–40.5 kV indoor and outdoor current and voltage transformers, covering 3–10 kV and 15–35 kV indoor VTs and 3–35 kV outdoor VTs. Its catalogue also includes gas-insulated-switchgear transformers, breaker transformers, electronic zero-sequence voltage sensors and combined metering units. The published address is Chanxi Village, Liushi, Yueqing. The broad range means that the exact voltage class, phase count and installation type must be stated before a quotation is meaningful.
Before requesting a quote: State the system voltage, indoor or outdoor installation, phase configuration, primary and secondary voltage, accuracy class, burden and voltage factor. Identify whether the VT is for metering, protection, residual-voltage detection or a combined metering box. Request the outline drawing, terminal diagram, fuse arrangement, insulation level and the test scope for the exact model.
Official sources: 3–10 kV indoor VT range · 3–35 kV outdoor VT range · contact page.
10. Yueqing Fuyi Switch Co., Ltd.
Short name: Fuyi Switch
Published location: No. 151 Jingliu Road, Yueqing Economic Development Zone
Yueqing Fuyi Switch states that it makes 10–35 kV current and voltage transformers and also publishes contact boxes, bushings, sensors, insulators and related switchgear components. Its catalogue includes JCZ-10 voltage-transformer references alongside gas-insulated-switchgear CTs. The contact page gives No. 151 Jingliu Road in the Yueqing Economic Development Zone. This makes the company relevant for a matched switchgear assembly, but the PT should remain a separately specified item with its own ratings, tests and responsibility.
Before requesting a quote: Provide the switchgear model, PT mounting position, phase spacing and available compartment. State the primary and secondary voltage, phase count, accuracy class, burden, voltage factor and residual-voltage requirement. If the order includes bushings, contact boxes or sensors, send the assembly drawing and define who is responsible for dielectric coordination and final testing. Request the PT drawing, nameplate and routine-test record.
Official sources: Voltage-transformer product · Switchgear product range · contact page.
Specify the voltage transformer as an instrument device
A VT quotation is comparable only when both suppliers describe the same electrical duty and physical interface. Build a technical schedule with the fields below, send it unchanged to the shortlisted manufacturers, and require each supplier to list deviations in writing.
| Include in your enquiry | Ask each supplier to confirm |
|---|---|
| Application and location | Metering, protection, residual-voltage detection or combined metering; indoor, outdoor, gas-insulated switchgear, ring-main unit or a specific switchgear compartment. |
| System and insulation | Rated system voltage, highest voltage for equipment, insulation level, frequency, phase spacing, pollution level, altitude and environmental conditions. |
| Primary and secondary voltage | Rated primary voltage, secondary voltage, phase-to-phase or phase-to-earth connection, transformation ratio and any tapped or dual-ratio arrangement. |
| Phase configuration | Single-phase, two-phase or three-phase unit; number of primary windings; whether three single-phase units form the required assembly. |
| Accuracy and burden | Accuracy class for metering and protection cores, rated burden in VA, power-factor basis, voltage factor and the complete secondary-loop load. |
| Secondary windings | Number and purpose of windings, residual-voltage winding, winding connections, terminal markings and the neutral or earthing arrangement. |
| Protection and fuses | HV fuse type and rating, integrated or separate fuse carrier, anti-resonance requirement, surge protection and the switchgear protection scheme. |
| Construction and dimensions | Cast-resin, oil or gas insulation; single- or three-phase construction; mounting holes, compartment depth, terminal positions, weight and cable or busbar clearance. |
| Tests and standards | Applicable standard, routine tests, type tests, special tests, partial-discharge requirements, report language and the exact model and factory covered by each document. |
| Nameplate and documents | Nameplate data and language, serial number, drawing revision, terminal diagram, installation instructions, packing protection and transport dimensions. |
| Production and change control | Factory address, subcontracting, approved model revision, component or material substitution rules and written notification before a change. |
Do not compare VTs by model name alone. A JDZ or JSZ label can cover different voltage ratios, phase configurations, winding counts, accuracy classes, burdens, fuses and mounting dimensions. Ask for the guaranteed electrical values and test basis in the order. For a three-phase unit, confirm the magnetic circuit, residual-voltage performance and behaviour during a single-phase earth fault. For an outdoor unit, confirm creepage distance, sealing and UV or pollution performance.
When the VT is part of a switchgear package, define the battery limits. State who supplies the PT, fuses, secondary wiring, terminal blocks, earthing, test links and final switchgear tests. A unit that fits mechanically but has not been checked against the host compartment and protection scheme can create a costly interface problem.
What to inspect during a voltage-transformer factory visit
Follow the selected VT through its production route. A useful visit links the winding, insulation, assembly and test records to the exact model and accessory scope in the quotation.
- Incoming materials: review the core, conductor, insulation, resin or oil, fuse carrier and nameplate identification, and how material batches are linked to production records.
- Core and winding: compare the core construction, winding direction, number of windings, ratio taps and interlayer insulation with the approved drawing.
- Insulation process: for cast-resin units, review vacuum casting, curing and partial-discharge controls; for oil or gas designs, review the applicable drying, filling, sealing and gas-handling records.
- Assembly and fuses: check terminal position, polarity, secondary wiring, fuse type and carrier, mounting dimensions, gaskets, earthing points and phase barriers.
- Routine tests: review ratio, polarity, winding resistance, insulation resistance, power-frequency withstand, no-load current and accuracy tests, plus partial-discharge or other tests required for the selected design.
- Type-test evidence: verify that the report identifies the offered model, ratings, factory and standards rather than only the company name.
- Document control: check how the serial number links to the drawing, nameplate, test result and packing list, and how changes are notified before shipment.
BottomRace coordinates electrical sourcing and purchasing in Yueqing. Pro: $0 separate service fee; procurement service costs are included in the product quotation. Basic: 5% of product value, with a minimum service fee of $100, for your existing Yueqing suppliers. Compare our Pro and Basic services. For on-site meetings, see our factory visit services. The quotation confirms the scope, inspections, payment terms and any additional costs.
For related equipment, see our current-transformer manufacturer guide, power-transformer guide, distribution-box guide and terminal-block guide.
Questions voltage-transformer buyers often ask
What is the difference between a voltage transformer and a power transformer?
A voltage transformer is an instrument device that reduces system voltage to a standard secondary level for meters, relays and control equipment. A power transformer transfers electrical load between voltage levels and is rated by power and losses. They should not be substituted for one another, even when both products appear in the same supplier catalogue.
How do I choose single-phase or three-phase?
The choice follows the switchgear, metering and protection design. Three single-phase VTs can be connected in a bank, while a three-phase unit may use a five-limb core or another construction for residual-voltage performance. Give the supplier the connection diagram, the earthing arrangement and the required behaviour during an earth fault.
What does the voltage factor mean?
The voltage factor defines the multiple of rated primary voltage that the VT must withstand or remain accurate at for a specified time. It is selected from the system earthing and protection scheme. Do not use a generic factor from a catalogue without checking the project standard and the relay or meter requirements.
When is a residual-voltage winding required?
A residual-voltage winding is used in an earth-fault detection or protection scheme. The need depends on the system earthing, relay scheme and VT connection. State the required winding ratio, burden and connection so that the supplier can provide the correct terminal arrangement and test data.
Why does the fuse arrangement matter?
The fuse protects the VT and its primary circuit, but the type, rating, carrier and mounting arrangement must match the switchgear. An integrated elbow-type fuse is not interchangeable with a separate fuse or a different compartment design. Confirm who supplies, tests and takes responsibility for the complete fused assembly.
Can BottomRace help arrange a Yueqing VT factory visit?
Yes. Email your VT application, system voltage, primary and secondary voltage, phase configuration, accuracy class, burden, fuse arrangement and preferred dates to contact@bottomrace.com. We can agree the local coordination, interpretation and observation scope before arranging the visit. We do not replace your engineer’s protection or metering design review.
Build your voltage-transformer shortlist with local support
Email your VT specification, host equipment drawing, quantities and preferred visit dates. We can discuss suitable suppliers and factory visits in Yueqing.