Basler Electric BE1‑59‑A4E‑E1K‑B1S3F Overvoltage Relay
The Basler Electric BE1‑59 is a solid‑state overvoltage relay that provides reliable protection against sustained overvoltage conditions in power systems. The specific style A4E‑E1K‑B1S3F offers a defined set of inputs, outputs, and time‑delay characteristics, making it suitable for generator, transformer, and feeder protection.
This relay monitors the AC voltage and trips when the voltage exceeds a preset threshold for a specified time. It features a pickup accuracy of ±1% and a wide adjustment range, allowing coordination with other protective devices. The solid‑state design ensures fast operation and long life without mechanical wear.
Key Features
Adjustable pickup voltage: 80–140% of nominal
Definite time delay: 0.1–10 s (adjustable)
High accuracy: ±1% of setting
Isolated output relay with form‑C contacts
LED status indication for power and trip
Compact case for panel or rack mounting
Technical Specifications
Nominal input: 120/240 VAC, 50/60 Hz; burden: < 3 VA; pickup range: 96–336 VAC (for 240 V nominal); reset ratio: 98% typical; output contacts: 1 x SPDT, 5 A at 250 VAC; operating temperature: -20°C to +65°C.
Applications
Commonly used to protect generators from overvoltage due to governor or AVR malfunction, to safeguard transformers from overvoltage on the primary side, and to protect sensitive loads from sustained high voltage. The relay is also employed in capacitor bank protection.
Installation and Setting
Mount the relay on a standard panel. Connect the voltage sensing leads to the monitored circuit. Set the pickup voltage and time delay using the front‑panel knobs and DIP switches. The relay includes a test button for functional verification.
Reliability and Maintenance
The BE1‑59 features transient suppression and is immune to harmonic distortion. Routine inspection of wiring and periodic calibration checks are recommended. The solid‑state construction eliminates contact bounce and arcing.
Why Choose the BE1‑59?
This relay provides a simple, cost‑effective solution for overvoltage protection, backed by Basler Electric’s reputation for quality. Its versatility and ease of use make it a preferred choice for both OEMs and maintenance engineers.
In summary, the Basler Electric BE1‑59‑A4E‑E1K‑B1S3F is a dependable overvoltage relay, ensuring system safety and preventing damage from excessive voltage.
