Basler Electric KT3B Voltage Regulator

The Basler Electric KT3B is a compact, cost‑effective automatic voltage regulator designed for brushless generators up to approximately 500 kVA. It maintains the generator output voltage within ±1% of the setpoint under varying load and speed conditions. The KT3B is widely used in diesel generator sets, mobile power units, and renewable energy hybrid systems.

Control and Protection

The regulator uses a simple proportional‑integral control loop for stable voltage regulation. It includes an adjustable stability control to match different exciter time constants. Over‑excitation protection, under‑frequency roll‑off, and a sensing loss shut‑down feature ensure safe operation under abnormal conditions. A built‑in trim potentiometer allows fine‑tuning of the voltage setpoint.

Easy Setup and Operation

Installation requires only a few connections: AC sensing, DC power (optional), and field output. The regulator is fully solid‑state and requires no programming; all adjustments are made with front‑panel potentiometers. LED indicators show power on and excitation status, simplifying troubleshooting.

Technical Specifications

Sensing voltage: 100–480 VAC, single‑phase or three‑phase. Frequency: 50/60 Hz. Excitation output: 0–75 VDC, up to 4 A continuous. Voltage regulation accuracy: ±1%. Response time:<100 ms. Operating temperature: –20°C to +60°C. The KT3B is housed in a rugged aluminium case suitable for panel or chassis mounting.

Applications

The KT3B is ideal for standby generators used in hospitals, data centres, telecommunications, and construction sites. It is also used in agricultural irrigation pumps and remote off‑grid installations where simple and reliable voltage control is essential. The regulator can be used with self‑excited or separately excited generators.

Installation and Commissioning

Mount the regulator near the generator control box. Connect the sensing leads to the generator output terminals, and the field leads to the exciter stator. Commissioning involves adjusting the voltage setpoint and stability control while observing the generator output. A manual test mode is available for verifying field output.

Durability and Maintenance

With no moving parts and a simple circuit design, the KT3B offers high reliability and low maintenance. Periodic inspection of connections and cleaning of the unit is sufficient. The regulator is protected against reverse polarity and short circuits on the field output.

Conclusion

The Basler Electric KT3B voltage regulator provides dependable, easy‑to‑use voltage control for a wide range of generator applications. Its robust construction, simple adjustment, and proven performance make it a trusted choice for generator manufacturers and end users alike.