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-20SK, EPF-20SL, EPF-20SNE, EPF-20DZE, EPF-30DE

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Single-pole voltage transformers in this indoor medium-voltage range are epoxy-resin-cast potential transformers designed for 12 kV, 24 kV, and 36 kV power systems. These instrument transformers operate with measuring and monitoring instruments for power system analysis and supervision or in conjunction with protective relays to support system safety and reliability. Selected models can be equipped with a primary-side fuse assembly, and certain models offering a rated thermal burden of 1000 VA or higher may also serve as a power source for circuit breaker operation, functioning as control power transformers (CPT), control transformers (CTR), or industrial control transformers in switchgear and machine tool applications.

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

EPF-20SI, EPF-20SN

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Voltage transformers EPF-20SI and EPF-20SN are potential transformers for 12 / 24 kV power systems. These voltage transformers are cast in epoxy resin and designed for indoor applications, offering stable electrical characteristics and compliance with IEC or IEEE standards. Flexible configurations are available to meet different system 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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Outdoor voltage transformers in the VPF Series are medium-voltage (MV) potential transformers designed for revenue metering applications. As part of a Metering Outfit (MOF), these 15.5–36.5 kV instrument transformers are cast in Araldite® UV-resistant cycloaliphatic epoxy resin and are suitable for long-term outdoor service in harsh environments, including solar ultraviolet radiation, salt fog, high temperature, and high humidity.

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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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Medium-Voltage (MV) Voltage Transformers / Potential Transformers 3.6-7.2 kV

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Voltage Transformer 3.6-7.2 kV Series by CIC is primarily designed to provide indoor VT (PT) solutions. This includes coil-molded voltage transformers that can also be used as control and operating power sources. Additionally, the lineup includes fully molded cast resin voltage transformers and medium-voltage three-phase grounding voltage transformers. The primary insulation material employed in this series is the internationally renowned Araldite® epoxy resin from Huntsman Advanced Materials (formerly Ciba-Geigy). This choice ensures the utmost reliability and performance of the voltage transformers. Customization is a key feature of CIC's voltage transformers, allowing them to be tailored to meet specific regulatory requirements, including those outlined by IEC, IEEE, and other industry standards. To guarantee the quality and precision of our voltage transformers, type tests and routine tests are meticulously carried out at CIC's Advanced Electricity Lab. This facility is accredited by TAF, a member of ILAC, underscoring our commitment to maintaining the highest standards. With decades of experience in manufacturing instrument transformers, CIC also provides ODM/OEM services. CIC's medium-voltage voltage transformers have been widely adopted by electric utilities, factories, major projects and construction companies globally for metering and distribution applications.

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Medium-Voltage (MV) Voltage Transformers / Potential Transformers 12-24 kV

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12-24 kV Voltage Transformers (VT) by CIC constitute a stellar range of indoor and outdoor potential transformers designed for various electrical applications, including metering, distribution, and specialized functions. Distinguished by their unique and advanced features, along with superior performance, this remarkable series of voltage transformers has garnered significant interest and widespread acclaim from numerous customers in the expansive international market.

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Medium-Voltage (MV) Voltage Transformers / Potential Transformers 36 kV

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36 kV Voltage Transformers (VT) by CIC include both indoor and outdoor potential transformers (PT). The series features single-pole resin-cast voltage transformers, capable of being combined into three-phase voltage transformer and Grounding Potential Transformer sets, alongside metal-clad-for-shielding resin-cast voltage transformers. Additionally, there are models specifically designed for power billing Metering Outfit (MOF), renowned for their exceptional UV resistance and enduring resilience, trusted by power companies across countries for over two decades. CIC's epoxy resin-cast voltage transformers utilize Huntsman's (formerly Ciba-Geigy in Switzerland) internationally acclaimed Araldite® epoxy resin. The outdoor models are meticulously crafted with UV-resistant cycloaliphatic epoxy resin, ensuring unwavering quality. Type tests and routine tests for CIC's voltage transformers are executed at CIC's Advanced Electricity Lab, accredited by TAF, a member of ILAC. With decades of experience, CIC not only manufactures voltage transformers but also offers customization and ODM/OEM services. Widely adopted by power utilities, major projects, and construction companies worldwide, CIC's voltage transformers play a crucial role in metering and distribution projects.

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