Basler Electric BE1-59 – Solid‑State Overvoltage Relay (Style A3E‑A1J‑N1N3F)

The Basler Electric BE1-59 (style BE159A3EA1JN1N3F) is a solid‑state overvoltage relay that provides reliable protection against excessive voltage on generators, transformers, and feeders. It trips when any phase voltage exceeds a user‑adjustable threshold, preventing equipment damage and system instability.

Protection Features

The relay monitors three‑phase voltage inputs and offers independent pickup and time delay settings for each phase. The pickup level is adjustable from 100% to 130% of nominal voltage, and the time delay can be set from 0.1 to 10 seconds. A built‑in target indicator latches on trip for fault analysis.

• Voltage inputs: 120/240 V AC, 50/60 Hz

• Pickup range: 100–130% of nominal, adjustable

• Time delay: 0.1–10 seconds

• Accuracy: ±2% of setting

• Output contacts: 2 Form‑C relays, 5 A at 250 V AC

• Power supply: 120/240 V AC or 125/250 V DC

• LED indicators: power, alarm, and trip

• Mounting: panel draw‑out case

• Operating temperature: –20 °C to +65 °C

Applications

This relay is used in generator protection panels, transformer feeders, and motor control centres to safeguard against overvoltage caused by loss of load, regulator failure, or system faults.

Installation and Configuration

Mounting is via a standard panel cutout. Settings are made using front‑panel potentiometers and DIP switches. A test jack allows verification without live power.

Reliability and Compliance

Built with Basler's solid‑state technology, it complies with IEEE C37.90 and IEC 60255 standards.

In summary, the Basler Electric BE1‑59 provides essential overvoltage protection, ensuring the safety and reliability of critical power equipment.