Basler Electric BE25927001 Current Transformer

The Basler Electric BE25927001 is a high‑accuracy current transformer (CT) designed for current measurement and protection in power systems. It features a primary‑to‑secondary ratio of 1:34, meaning that a primary current of 34 amperes produces a secondary current of 1 ampere (or vice versa, depending on the configuration). This transformer is used to step down large primary currents to safe, standardized levels for feeding into protective relays, metering instruments, and control devices. Its robust construction ensures reliable performance in industrial and utility environments.

Design and Materials

The BE25927001 is built with a high‑permeability silicon steel core, which provides excellent linearity and low excitation loss. The windings are made of high‑grade copper, insulated with a Class B (130°C) or higher insulation system. The assembly is vacuum‑impregnated with an epoxy resin to protect against moisture, dust, and mechanical stress. The terminals are clearly marked for primary and secondary connections, and the unit is designed for panel or busbar mounting with standard hardware.

Accuracy and Performance

This CT offers accuracy classes suitable for both metering and protection applications (typically class 0.5 or 1.0 for metering, and class 5P or 10P for protection). The ratio error and phase displacement are within the limits specified by IEC 60044 or IEEE C57.13 standards. The transformer exhibits low burden and high short‑circuit current withstand capability, ensuring dependable operation even during fault conditions. Frequency response is optimized for 50/60 Hz systems.

Technical Specifications

Primary current: 34 A (nominal). Secondary current: 1 A (or 5 A depending on configuration). Ratio: 1:34. Rated burden: typically 5‑15 VA. Insulation voltage: 3 kV RMS. Frequency: 50/60 Hz. Operating temperature: –25°C to +65°C. Enclosure: epoxy‑encapsulated or open frame (depending on variant). Weight: approximately 1‑2 kg.

Applications

This current transformer is used in switchgear, motor control centers, and generator protection panels for measuring load currents, feeding overcurrent and differential relays, and providing inputs to energy meters and power quality analyzers. It is suitable for indoor installations with moderate ambient conditions.

Installation and Maintenance

Install the CT on the primary conductor (busbar or cable) with the proper orientation of the primary and secondary terminals. Ensure that the secondary circuit is never left open while the primary is energized, as this can cause dangerous high voltages. Connect the secondary leads to the relay or meter with appropriate wire size. No regular maintenance is required beyond periodic inspection of connections and insulation resistance testing.

Reliability and Quality

Basler Electric manufactures this transformer with strict quality control, including turns‑ratio verification, polarity testing, and insulation resistance checks. The unit is designed for long service life and is backed by Basler’s technical support and documentation.

Conclusion

The Basler Electric BE25927001 current transformer offers precise and reliable current transformation for protection and measurement. Its 1:34 ratio and rugged construction make it a valuable component in any power system requiring accurate current sensing.