Basler Electric EL200-7 – Wide‑Input Static Voltage Regulator

The Basler Electric EL200-7 is a versatile solid‑state voltage regulator engineered to provide precise excitation control for generators with AC input voltages ranging from 90 to 660 V AC. With a continuous output current rating of 7 A, this regulator is suitable for small to medium‑sized synchronous machines in industrial, agricultural, and standby applications.

Design and Capability

The EL200-7 utilises a pulse‑width modulation (PWM) switching topology to achieve high efficiency and low harmonic distortion. Its wide input range accommodates generators with varying output voltages without the need for external transformers. The regulator includes a built‑in voltage reference with an adjustable setpoint, enabling fine‑tuning of the generator terminal voltage from 90% to 110% of nominal. Additional features include under‑frequency compensation, over‑excitation limiting, and soft‑start to reduce stress on the field winding.

• Input voltage: 90–660 V AC (single‑phase or three‑phase sensing)

• Frequency: 50/60 Hz (auto‑detection)

• Output current: 7 A continuous (10 A for 10 seconds)

• Output voltage: up to 150 V DC (depending on input)

• Regulation accuracy: ±0.5% from no‑load to full‑load

• Response time: < 80 ms for 50% load change

• Protections: reverse polarity, short circuit, and overtemperature

• LED indicators: power, regulation, and fault

• Mounting: panel mount with heat sink

• Operating temperature: –25 °C to +60 °C

Typical Applications

This regulator is ideal for portable generator sets, marine auxiliary generators, and off‑grid power systems. Its wide input range makes it a drop‑in replacement for many older regulators, facilitating upgrades. The EL200-7 also supports remote voltage adjustment via an external potentiometer, allowing operator control from a distance.

Installation and Calibration

Mounting is simple with four screws, and all connections are made through robust terminal blocks. A single trimpot adjusts the voltage setpoint; another sets the stability (gain) to match the generator’s response characteristics. Diagnostic LEDs help verify correct wiring and operation during commissioning.

Durability and Compliance

Built with conformal‑coated boards and high‑quality semiconductors, the EL200-7 withstands humidity, dust, and vibration. It complies with CE and RoHS standards, ensuring environmental safety. Basler’s rigorous quality control guarantees long‑term reliability in demanding conditions.

In conclusion, the Basler Electric EL200‑7 voltage regulator offers a flexible, robust solution for generator excitation across a wide voltage range, delivering stable voltage with minimal maintenance.