Basler BE1-81 Digital Frequency Relay

The Basler BE1-81 (style T1E-E1C-B0N1F) is a digital frequency relay offering overfrequency (81O) and underfrequency (81U) protection. It is designed for generators, motors, and utility interconnections, with high accuracy and programmable setpoints.

Features a front‑panel display, keypad, and Modbus communication.

Technical Specifications

• Model: BE1-81 (T1E-E1C-B0N1F)

• Protection: Over/under frequency

• Nominal: 50/60 Hz selectable

• Pickup: 45‑65 Hz adjustable

• Time delay: 0.1‑30 s

• Accuracy: ±0.02 Hz

• Output: 2 form C

• Power supply: 24‑240 V AC/DC

• Operating temperature: -40°C to +70°C

• Certifications: CE, UL, RoHS

Functional Features

• Independent over/under elements.

• High accuracy.

• Event recording.

Typical Applications

• Generator protection.

• Load shedding.

• Utility intertie.

Installation

Panel mount, connect PT and power.

Conclusion

BE1-81 provides reliable frequency protection.