Potential Transformers (Circuit Breaker Operation Power Source)
Medium-Voltage Epoxy-Cast Indoor PTs
About the Product
Potential transformers EPF-3SF1 and EPF-6SF2 are primarily mounted on switchgear (3.3kV and 6.6kV, respectively) as an auxiliary power source for circuit breaker operation. Compact and of a flatter shape than other models, these potential 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 potential 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 potential transformers are characterized by a high-quality exterior, excellent moisture resistance, and superior electrical performance.
Other standards and specifications available.
|Burden / Accuracy||AC/BIL|
|Primary-Side Fuses||Approx. Weight|
|EPF-3SF1||IEC||1||50 or 60||3600|
|100VA / 1.0CL|
200VA / 3.0CL
|EPF-6SF2||IEC||1||50 or 60||7200|
|200VA / 1.0CL|
500VA / 3.0CL
- Related Products
Indoor medium-voltage single-phase coil molded potential transformers for power systems ≦ 7.2 kV. Laminated-core & cut-core models. 2 primary-side fuses. Circuit breaker operation power source (EP-6SFK).
Designed for 24kV 4-way switchgear, this MV single-pole potential transformer features a high-voltage elbow-type connector on the primary side and a built-in high-voltage fuse for protection. Exterior coated with a metal conductive mixture for shielding. Secondary side sealed and waterproof. Araldite® epoxy resin as insulation.
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Intended for the main panel or the motor control panel of a 3.6/7.2 kV power system and designed to be used with measuring or monitoring instruments, or with protective relays. Each CT has a busbar terminal. Insulated with Araldite® epoxy resin.
Offering a higher rated current ratio, this medium-voltage, two-core current transformer is suited to the main panel or the motor control panel of a 3.6kV (max.) power system and can be used with measuring or monitoring instruments, or with protective relays. Araldite® epoxy resin.
2-core & single-core models. Indoor window-type current transformers for the main panel or motor control panel of a MV (≦ 3.6 kV) power system. Good for protection and appropriate for measuring and monitoring instruments. Araldite® epoxy resin.
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How to select, based on application and power system attributes, the primary and secondary currents, burden, accuracy, rated frequency, type (indoor vs. outdoor), insulation material, etc.