Basler Electric BE1‑60 Voltage Balance Relay (T176884)
The Basler Electric BE1‑60 is a solid‑state voltage balance relay designed to monitor three‑phase voltages and detect phase‑to‑phase or phase‑to‑neutral imbalances. It operates by comparing the magnitudes of the three phase voltages and tripping when the deviation between any two phases exceeds a preset percentage. This relay is essential for protecting three‑phase motors, generators, and transformers from unbalanced supply voltages that can cause overheating and premature failure.
The BE1‑60 features adjustable pickup (balance) percentage and time delay, allowing coordination with other protection devices. Its true‑RMS measurement ensures accurate performance even with non‑linear loads.
Key Features
Detects phase voltage imbalance (negative‑sequence components)
Adjustable imbalance pickup: 2–20%
Adjustable time delay: 0.1–10 s
High accuracy: ±1% of setting
Output relay with form‑C contacts
LED indicators for power and trip
Panel or DIN‑rail mounting
Technical Specifications
Nominal input: 120/240/480 VAC, 50/60 Hz; burden: < 5 VA; pickup range: 2–20% of nominal; reset ratio: 95% typical; output contacts: 1 x SPDT, 5 A; operating temperature: -20°C to +65°C.
Applications
Commonly used in motor control centres to protect large induction motors from voltage unbalance, in generator sets to detect phase loss or open delta VT failures, and in distribution feeders to prevent nuisance tripping of downstream devices.
Installation and Setting
Mount the relay in a clean, dry location. Connect the three phase voltage leads to the input terminals. Set the imbalance percentage and time delay using the front‑panel controls. A test input is provided for commissioning.
Reliability and Maintenance
The solid‑state design ensures long life and minimal maintenance. The relay is protected against voltage transients and surge. Periodic calibration verification is recommended.
Why Choose the BE1‑60?
This relay provides a simple and effective solution for voltage balance protection, backed by Basler Electric’s reliability. Its compact size and straightforward settings make it easy to integrate into existing systems.
In summary, the Basler Electric BE1‑60 voltage balance relay helps prevent equipment damage from unbalanced voltages, improving system reliability.
