Basler Electric BE1‑59N Solid State Protective / Ground Fault Overvoltage Relay

The Basler Electric BE1‑59N is a solid‑state relay that provides protection against ground fault overvoltage conditions in ungrounded or high‑impedance grounded systems. It monitors the zero‑sequence voltage (3V0) and trips when the voltage exceeds a preset threshold, indicating a ground fault. This relay is essential for detecting intermittent or arcing ground faults that may not produce sufficient current for overcurrent relays.

The BE1‑59N features adjustable pickup voltage and time delay, allowing coordination with other protection devices. Its high sensitivity and fast response make it ideal for applications where early detection of ground faults is critical to prevent equipment damage or fire.

Key Features

• Ground fault overvoltage detection

• Adjustable pickup: 1–100 V (secondary)

• Time delay: 0.1–10 s (definite time)

• High input impedance for minimal burden

• LED trip indicator and reset button

• Compact DIN‑rail mounting

Technical Specifications

Voltage input: 120 VAC, 50/60 Hz; burden: < 0.5 VA; pickup accuracy: ±2%; output relay: 1 x SPDT, 5 A; operating temperature: -20°C to +65°C; enclosure: IP40.

Applications

Commonly used in industrial distribution systems, hospital power supplies, and critical process plants where uninterrupted service is essential. The BE1‑59N provides early warning of ground faults, enabling maintenance before a catastrophic failure occurs.

Installation and Setting

Mount the relay on a DIN rail. Connect the voltage sensing leads to the open‑delta or broken‑delta VT secondary. Set the pickup voltage and time delay using the front‑panel controls. A test input allows simulation of ground fault conditions.

Reliability and Maintenance

The solid‑state design ensures long life and stable operation. The relay is protected against transients and surges. Regular testing is recommended to verify calibration and functionality.

Why Choose the BE1‑59N?

This relay offers a cost‑effective solution for ground fault overvoltage protection, with the reliability and simplicity of analog circuitry. Basler Electric’s reputation for quality ensures dependable protection for your power system.

In summary, the Basler Electric BE1‑59N is a vital component for detecting ground faults in ungrounded systems, enhancing safety and reliability.