24 kV Two-Core Current Transformer (for Polluted Regions)

EWF-20DK

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2-core current transformer for a 20~24kV power system. Used in conjunction with measuring or monitoring instruments, and with protective relays. Epoxy cast. Designed to have greater creepage, it is appropriate for polluted regions.

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Multi-Ratio Current Transformers (Single-Core & Two-Core Options) for 25 kV max. Power Systems

CR-20S Series

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Current transformers for installation in a switchgear panel of a 25kV (max.) power system and to be used with measuring or monitoring instruments, or protective relays. These are economic models suited to locations of high humidity or moderate pollution. The insulation material for the core and the secondary coil is Araldite® epoxy resin.

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Bushing Current Transformers for Draw-Out Circuit Breakers

HCB-2415(A), EBF-25M Series

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Multi-ratio bushing current transformers (bushing CTs, or BCTs) designed for 24kV draw-out circuit breakers and to be used with measuring (or monitoring) instruments or protective relays. IEEE 0.3 B-0.9. Cast in Araldite® epoxy.

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Outdoor-Type Current Transformers / Extended Range Current Transformers (ERCTs) for Revenue Metering (12~36 kV)

AWF-12, AWF-24, AWF-36

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These outdoor current transformers for revenue metering, intended for 12~36 kV power systems, are used as part of an MOF (Metering Outfit) or for current monitoring. Insulated with UV-resistant cycloaliphatic epoxy resin, these medium-voltage (MV) current transformers are ideal for outdoor use and can be available as Extended Range Current Transformers (ERCTs) when requested.

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36 kV Multi-Ratio Current Transformers (Indoor Use)

EWF-30D Series

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Suited to ≤ 36kV power systems, these multi-ratio current transformers are available in 2-core and 3-core options. Insulated with Araldite® epoxy and intended to work with measuring or monitoring instruments, or with protective relays.

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High-Voltage (HV) Outdoor Current Transformer, 52 kV & 72.5 kV

AWF-52, AWF-72

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These high-voltage current transformers (52 kV or 72.5 kV), designed for outdoor use, are available in single-core and two-core varieties. Featuring extended creepage distance and insulated with UV-resistant cycloaliphatic epoxy resin, these current transformers can withstand solar ultraviolet radiation and IEC-defined pollution level III (“Heavy”). They’re especially ideal for regions with salt fog, high temperature, and high humidity.

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Control Power Transformers / Low-Voltage (LV) Voltage Transformers (Potential Transformers)

CPT Series

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These low-voltage control transformers, resin-insulated for Class A or Class F insulation, are economical while conforming to UL safety requirements and regulations. Highly resistant to moisture, heat and dust, these control power transformers are suitable for use at highly polluted locations. Some models of this versatile series can be used as voltage transformers (potential transformers) with Class 0.5 or Class 1.0 accuracy according to IEC’s standard for voltage transformers.

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Low-Voltage Dry-Type Control Transformers

S Series

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These low-voltage control power transformers, with Class A or Class H insulation, are economical products suitable for use with machine tools or industrial equipment at indoor locations with lower humidity. Also referred to as "control transformers" (CTR), "industrial control transformers," or "machine tool transformers," these control power transformers (CPT) can also be installed in low-voltage main panels or motor control panels as an auxiliary power source. This dry-type transformer is compact and easy to install.

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Low-Voltage Dry-Type Control Transformers (With Optional Enclosures)

DSH Series

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DSH Series low-voltage control transformers are compact, economical, and suitable for use with machine tools or industrial equipment. This product is often referred to as an "industrial control transformer," "machine tool transformer," "control power transformer" (CPT), or "control transformer" (CTR).

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Coil Molded Single-Phase Voltage Transformers (Potential Transformers), Indoor Use

EP-3SF/6SF Series

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Voltage transformers of the EP-3SF/6SF Series are coil-molded, single-phase, indoor-type, medium-voltage, epoxy-resin-insulated potential transformers suitable for power systems of 7.2kV or below. Made with either a laminated core (Model EP-3SF2) or a cut core (EP-3SF5 & EP-6SFK), the voltage transformer has two power fuses attached to the primary side. Specific models from this series can be used as an auxiliary power source for circuit breaker operation — that is, as a control power transformer (CPT), also referred to as a control transformer (CTR), industrial control transformer, or machine tool transformer.

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Voltage Transformers (Potential Transformers) as Circuit Breaker Operation Power Source

EPF-3SF1, EPF-6SF2

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Voltage transformers EPF-3SF1 and EPF-6SF2 are medium-voltage, indoor-type potential transformers cast in epoxy resin, commonly installed on switchgear (3.3kV or 6.6kV) to serve as an auxiliary power source* for circuit breaker operation. Positioned atop the switch as an operational power source, these transformers can handle relatively high outputs for short durations. Featuring Class-F heat-resistant insulation material for the coils, each voltage transformer is equipped with two power fuses on the primary side to safeguard against overload and short-circuit currents. * Auxiliary power source: In this application, the voltage transformer may also be referred to as a "control power transformer" (CPT), "control transformer" (CTR), "industrial control transformer," or a "machine tool transformer."

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Three-Phase Grounding Voltage Transformer (GVT), or Grounding Potential Transformer (GPT), for MV Indoor Applications

EGP-3DF, EGP-6DF

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This ground voltage transformer (GVT), or ground potential transformer (GPT), is a three-phase medium-voltage (MV) potential transformer for indoor applications. With a fuse for each phase, this PT (VT) features epoxy-insulated coils and a five-legged (five-limbed) laminated core. This voltage transformer is used with measuring or monitoring instruments, or for ground-fault protection.

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Single-Pole Voltage Transformers (Potential Transformers), or Three-Phase VT (PT) + GVT (GPT)

EPF-10CE, EPF-10DE, EPF-20SK, EPF-20SL, EPF-30DE

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Voltage transformers from this series are indoor medium-voltage single-phase epoxy-resin-cast potential transformers suitable for 12kV, 24kV, and 36kV power systems. They are used in conjunction with measuring instruments for system monitoring and analysis or in combination with protective relays. Specific models can be equipped with a combination fuse assembly on the primary side. Additionally, models with a maximum thermal burden of 1000 VA can also function as a power source for circuit breaker operation, meaning they can serve as "control power transformers" or "control transformers," also known as CPT or CTR, or "industrial control transformers" or "machine tool transformers."

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12 kV & 24 kV Epoxy-Cast Voltage Transformers (Potential Transformers) for Indoor Use

EPF-10B/20SE/20SI

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Widely used for 12~24 kV power systems and insulated with Araldite® epoxy resin, these voltage transformers, or potential transformers, are characterized by superior moisture resistance and excellent electrical properties. Customizable for different standards and requirements.

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Conductive Shield Voltage Transformer (Potential Transformer) for 24 kV 4-Way Switchgear (Also Operation Power Source)

EPF-20FB

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This voltage transformer is a single-phase, epoxy-resin-cast medium-voltage potential transformer designed to also function as an operation power source*, specifically paired with 24kV 4-Way Switchgear. It features a high-voltage elbow-type connector on the primary side and includes an internal high-voltage power fuse for protection. The exterior of the voltage transformer is coated with a conductive metal mixture for shielding, and waterproof treatment can be requested for the secondary side. The voltage transformer has a rated burden and accuracy of 600 VA / 3.0 CL. * Operation power source: In this application, the voltage transformer can also be referred to as a "control power transformer" (CPT), "control transformer" (CTR), "industrial control transformer," or a "machine tool transformer."

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Voltage Transformer (Potential Transformer) for SF6 Gas-Insulated MOF Panel

EPF-20SH

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Intended for power companies, this indoor single-phase epoxy-cast voltage transformer, or potential transformer, is designed to be mounted inside the SF6 gas-insulated MOF (Metering Outfit) panel of a 25.5 kV (max.) power system. With an added tap in the secondary winding, this VT (PT) can offer two voltage ratios (120/60:1).

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12 kV & 24 kV Epoxy-Cast Voltage Transformer (Potential Transformer) or Control Power Transformer, as Power Source for Circuit Breaker Operation and Lighting

EPF-20DZ

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This voltage transformer, cast with self-extinguishing epoxy resin, is a medium-voltage, indoor-type, single-phase potential transformer for a 12kV or 24kV power system for measuring and monitoring voltage signals. With a continuous output capacity of 4000 VA (max.), it can also serve in a small substation or a switchgear panel as a power source for circuit breaker operation and lighting equipment*. * Power source for circuit breaker operation and lighting equipment: In this application, the voltage transformer can also be referred to as a "control power transformer" (CPT), "control transformer" (CTR), "industrial control transformer," or a "machine tool transformer."

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Outdoor-Type Voltage Transformers (Potential Transformers) for Revenue Metering

VPF Series

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Cast in Araldite® UV-resistant cycloaliphatic epoxy resin, these medium-voltage (MV) voltage transformers (potential transformers) for revenue metering are designed for long-term outdoor use in harsh conditions such as solar ultraviolet radiation, salt fog, high temperature, and high humidity. Designed to be part of a Metering Outfit (MOF).

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36 kV Epoxy-Cast Voltage Transformers (Potential Transformers)

EPF-30SA, EPF-30SB

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Indoor-use voltage transformers (potential transformers) for 36 kV (max.) power systems. IEC type testing & environmental testing (-45℃~+65℃). The choice of major corporations of numerous countries. Insulated with Araldite® epoxy resin. Superior moisture resistance.

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36 kV Metal-Clad Voltage Transformer (Potential Transformer) for Indoor Application

EPF-30SE

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Intended for the switchgear panels of a 36 kV power system, this single-pole epoxy-cast voltage transformer (potential transformer) for indoor application is covered with an aluminum box. The grounded aluminum box for shielding reduces the installation space requirement.

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Epoxy Insulator Accessories for Medium-Voltage C-GIS

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Epoxy resin insulator accessories play a crucial role in C-GIS, which is short for cubicle-type gas-insulated switchgear—a type of gas-insulated switchgear (GIS). These insulator accessories are integral to the metal-enclosed switchgear equipment that is insulated with sulfur hexafluoride (SF6) gas.

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Digital Tester (Comparator) for Instrument Transformers

WHES-1Cx

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Digital Tester (Comparator) for Instrument Transformers is designed for the testing of ratio error and phase displacement of current transformers and voltage transformers (potential transformers).

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Standard Potential Transformers (Voltage Transformers)

WHJB Series

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WHJB Series Standard Potential Transformers are mainly used as reference PTs (VTs) in a variety of potential (voltage) transformer tests: error tests, characteristic tests, and so on.

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Standard Current Transformers

WHLB Series

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WHLB Series Standard Current Transformers are mainly used as reference CTs for current transformer measurements and tests: error tests, characteristic tests, and so on.

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