Basler Electric CBS-377 – Current Boost System (P/N 9109600102)

The Basler Electric CBS‑377 (part number 9109600102) is a current boost system designed to enhance the transient performance of generator voltage regulators. During sudden load increases, such as motor starting or transformer energisation, the CBS-377 injects additional excitation current to support rapid voltage recovery, preventing dips that could affect sensitive loads.

How It Works

The system monitors the generator output current and compares it to a preset threshold. When the current exceeds this level, the CBS-377 provides a temporary boost to the field current by injecting extra DC power. The boost duration is programmable, and the system gradually returns to normal operation as the load stabilises. This unit works in parallel with the main regulator, enhancing its response without interfering with steady‑state regulation.

• Input voltage: 120/240 V AC, 50/60 Hz

• Boost current: up to 10 A (depending on regulator output)

• Boost duration: 0.5–10 seconds, adjustable

• Pickup threshold: 50–120% of rated current

• Output: isolated DC injection to field circuit

• Status indicators: boost active and fault

• Mounting: panel or chassis mount

• Operating temperature: –20 °C to +60 °C

Applications

The CBS-377 is particularly useful for generator sets feeding motor‑heavy loads, such as pumps, compressors, and conveyors. It is also beneficial in marine and offshore applications where large starting currents are common.

Installation and Integration

Wiring is simple, with connections for AC supply, current sensing, and field injection. The unit is typically installed between the regulator output and the field winding. Adjustments for threshold and duration are made via front‑panel trimpots.

Reliability and Construction

Built with rugged semiconductors and protective circuitry, the CBS-377 is designed for continuous duty. Basler’s engineering ensures seamless compatibility with most Basler regulators.

In summary, the Basler Electric CBS‑377 current boost system provides essential transient support for generator excitation, improving voltage stability during heavy load changes.