Medium-Voltage Epoxy-Cast Indoor PTs | Elevate Power Distribution: Explore Premium Voltage Transformers | CIC

Voltage Transformers, or Potential Transformers, as Circuit Breaker Operation Power Source / Serving a diverse client base around the world, CIC is a leading manufacturer and supplier of current transformers, potential transformers (voltage transformers), distribution transformers, epoxy insulators, electronic meters, and other electrical and electronic products.

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

EPF-3SF1, EPF-6SF2

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."

Medium-Voltage Epoxy-Cast Indoor PTs

About the Product

Voltage transformers (potential transformers) EPF-3SF1 and EPF-6SF2 are primarily mounted on switchgear (3.3 kV and 6.6 kV, respectively) as an auxiliary power source for circuit breaker operation. Compact and of a flatter shape than other models, these voltage transformers are mounted on top of the power switch as an operation power source and are compatible with short-interval large output. With Araldite® epoxy resin as insulation, these voltage transformers also feature a Class-F heat-resistant insulation material for the coils. Two fuses on the primary side offer protection against overload and short circuit currents. EPF-3SF1 and EPF-6SF2 voltage transformers are characterized by a high-quality exterior, excellent moisture resistance, and superior electrical performance.

Specifications

Other standards and specifications available.

ModelStandardPhase
(Φ)
Frequency
(Hz)
Primary Voltage
(V)
Secondary Voltage
(V)
Burden / AccuracyAC/BIL
(kV)
Primary-Side FusesApprox. Weight
(kg)
EPF-3SF1IEC150 or 603600
3450
3300
120
115
110
100VA / 1.0CL
200VA / 3.0CL
10/4028.5
EPF-6SF2IEC150 or 607200
6600
4200
120
115
110
200VA / 1.0CL
500VA / 3.0CL
20/60216
3600
3300
10/40
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