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PotentialTransformers.com

Global B2B High Voltage Transformer Portal

PotentialTransformers.com is a leading international OEM & EPC supplier specializing in high-voltage potential transformers (3.3kV to 500kV), capacitive VTs (CVT), cast-resin dry transformers, and SF6 gas-insulated VTs for global power utilities, substations, and heavy industrials.

100% Factory Partial Discharge Tested

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  • Voltage Transformers (VT / PT)
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  • Electromagnetic PT vs. Capacitive CVT: Selection Guide for 110kV–500kV Substations
  • Understanding IEC 61869-3: Accuracy Classes, Burdens, and Temperature Rise Limits
  • High Voltage Faraday Lab Testing
  • Request Technical Datasheets

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  • 86 18852046268
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© 2026 PotentialTransformers.com. All Rights Reserved. Engineered for Global High-Voltage Grids.

IEC 61869-3 CompliantIEEE C57.13 CompliantKEMA Type Tested
Global Leader in Precision Voltage Measurement (3.3kV – 500kV)

Precision Voltage Transformers for Critical Power Grids

Engineered for maximum dielectric reliability, tariff revenue metering precision (Class 0.1 / 0.2S), and extreme environmental withstand. Supplying national utilities, GIS substations, and heavy industrial plant infrastructure worldwide.

Accuracy ClassClass 0.1 / 0.2S
Testing LabKEMA Type Tested
Partial Discharge< 5pC @ 1.2Un
Global Export50+ Countries
Explore Product CatalogAI Spec Selector Studio
JDZF9-35A Indoor Single-phase Epoxy Resin Casting Voltage Transformer JDZF9-35A
Model JDZF9-35A (35kV Dry Epoxy Resin)IEC 61869-3 Approved
Nominal System Voltage:35kV
Metering Winding Accuracy:0.2, 0.5
Insulation Impulse Withstand:40.5/95/200kV
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Complete Voltage Transformer Matrix

High Precision PT & CVT Products

500kV Extra-High-Voltage Capacitive Voltage Transformer (CVT)
500 kV (550kV max)
Voltage Transformer (VT) / Potential Transformer (PT)50/60Hz

TYD-500

500kV Extra-High-Voltage Capacitive Voltage Transformer (CVT)

Heavy-duty 500kV Extra High Voltage CVT for critical national backbone transmission grids. Engineered to withstand extreme transient overvoltages, lightning surges, and seismic tremors.

Accuracy Class0.1 / 0.2S / 3P
Insulation TypeCapacitive Divider
Rated Burden100 - 400 VA
ComplianceIEC 61869-5
View Specs
220kV Capacitive Voltage Transformer (CVT)
220 kV (230kV max)
Voltage Transformer (VT) / Potential Transformer (PT)50/60Hz

TYD-220

220kV Capacitive Voltage Transformer (CVT)

Ultra-high reliability 220kV Capacitive Voltage Transformer combining high-voltage capacitor stack divider with intermediate electromagnetic unit. Dual function as PT measurement source and PLC power line carrier coupling capacitor.

Accuracy Class0.1 / 0.2 / 0.5 / 3P
Insulation TypeCapacitive Divider
Rated Burden100 - 300 VA
ComplianceIEC 61869-5
View Specs
110kV SF6 Gas-Insulated Voltage Transformer
110 kV (115kV max)
Voltage Transformer (VT) / Potential Transformer (PT)50/60Hz

NVT-110

110kV SF6 Gas-Insulated Voltage Transformer

High-precision 110kV SF6 gas-insulated inductive voltage transformer engineered for main grid metering, protection relays, and GIS substation integration. Zero oil leakage risk with explosion-proof bursting disc.

Accuracy Class0.2S / 0.5 / 3P
Insulation TypeSF6 Gas Insulated
Rated Burden50 - 150 VA
ComplianceIEC 61869-3
View Specs
110kV High-Efficiency Power Transformer
110 kV
Power Transformer50/60Hz

SCB13-110

110kV High-Efficiency Power Transformer

110kV high-efficiency main power transformer with low no-load loss design, dynamic short-circuit withstand capability, and integrated optical fiber temperature monitoring.

Accuracy ClassMetering Grade CT/PT Integrated Option
Insulation TypeOil-Immersed
Rated Burden6.3 MVA to 63 MVA
ComplianceIEC 60076
View Specs
66kV SF6 Gas-Insulated Voltage Transformer
66 kV / 69 kV
Voltage Transformer (VT) / Potential Transformer (PT)50/60Hz

HPT-66

66kV SF6 Gas-Insulated Voltage Transformer

Compact 66kV outdoor SF6 gas-filled voltage transformer for wind farm collector systems, railway power supply stations, and urban compact substations.

Accuracy Class0.2S / 0.5 / 3P
Insulation TypeSF6 Gas Insulated
Rated Burden30 - 100 VA
ComplianceIEC 61869-3
View Specs
JDZX15-35A1-CQ Indoor Single-phase Metal Armoured Epoxy Resin Casting Voltage Transformer
35kV
Voltage Transformer (VT) / Potential Transformer (PT)50Hz / 60Hz

JDZX15-35A1-CQ

Indoor Single-phase Metal Armoured Epoxy Resin Casting Voltage Transformer

Indoor single-phase metal armoured epoxy resin casting voltage transformer, compliant with GB/T20840.1/3 and IEC61869-1/3; rated insulation level 40.5/95/200kV, applicable for 50Hz/60Hz power systems, aluminum shell full grounding design, net weight 75kg.

Accuracy Class0.2/3P(6P)、0.5/3P(6P)
Insulation TypeDry Epoxy Resin
Rated Burden30VA(0.2),60VA(0.5),150VA(1.0),100VA(3P)
Compliance
View Specs
View All 390 Voltage Transformer Models
Electrical Topology

Where Voltage Transformers Are Applied Across the Power Grid

From 500kV Extra High Voltage cross-border interconnections down to 10kV factory power distribution.

500kV – 220kV EHV Grid

Capacitive CVTs

Used in long-distance interconnections for metering and Power Line Carrier (PLC) telecommunications coupling.

Model: TYD-500EHV
110kV – 66kV Transmission

SF6 / Inductive VTs

Substation tariff revenue metering with class 0.2S precision and explosion-proof gas enclosures.

Model: NVT-110G
35kV – 33kV Sub-Transmission

Cast Resin & Oil VTs

Applied in wind farms, metro traction, and outdoor oil-immersed rural substation switchyards.

Model: JDZX11-35R
10kV – 11kV Distribution

Indoor MV Dry VTs

Mounted inside metal-clad switchgear panels for industrial plants and commercial distribution.

Model: JDZX10-10
High-Voltage Testing Facility

State-of-the-Art High Voltage Laboratory & Testing

Every potential transformer leaving our Hong Kong manufacturing base undergoes rigorous dielectric and routine testing inside our fully shielded High-Voltage Faraday Cage Test Hall before export.

  • Impulse Voltage Test: Up to 1000kV lightning & switching impulse testing.
  • Partial Discharge (PD) Guarantee: Guaranteed < 5pC at 1.2 Un operating voltage.
  • KEMA Type Testing: Dynamic short-circuit withstand and thermal stability tested.
  • Seismic Protection: Earthquake withstand rating up to Zone IX (0.5g peak ground acceleration).
Learn More About Our Factory Strength
High Voltage Faraday Testing Lab
1000kV HV Faraday Testing HallOnline automated partial discharge diagnostic system