Basler Electric SSR 63-12 – Static Voltage Regulator for 600 V AC Systems

The Basler Electric SSR 63-12 (part number 9 1859 00 101) is a solid‑state static voltage regulator designed for generator excitation in medium‑voltage power systems. It operates from a 600 V AC, 50/60 Hz input and delivers a controlled DC output to the field winding, ensuring stable generator terminal voltage under varying load and speed conditions.

Technical Highlights

This regulator uses advanced thyristor technology to achieve fast response and high efficiency. It accepts a wide input voltage range and provides a regulated output adjustable between 0 and 100% of rated field voltage. The built‑in voltage sensing circuit compares the generator output with a reference and modulates the firing angle of the SCR bridge accordingly. The SSR 63-12 includes under‑frequency roll‑off to protect the generator during overspeed and over‑excitation limiting to prevent field overheating.

• Input voltage: 600 V AC ±10%, 50/60 Hz

• Output voltage: up to 240 V DC (field dependent)

• Output current: 12 A continuous (15 A for 1 minute)

• Regulation accuracy: ±1% of nominal voltage

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

• Protections: overvoltage, undervoltage, phase loss, and short circuit

• Diagnostic LEDs: power, regulation, fault, and field status

• Mounting: panel or chassis with heat sink

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

Typical Applications

The SSR 63-12 is ideal for generators in industrial plants, marine vessels, and power stations where the main bus voltage is 600 V AC. It works with both brushless and static excitation systems, providing reliable voltage support for motors, transformers, and sensitive electronic loads. Its robust design makes it suitable for continuous duty in harsh environments.

Installation and Tuning

Mounting is via four bolts on a flat surface, with adequate clearance for ventilation. Terminal blocks are clearly labelled for AC input, field output, and sensing connections. An external potentiometer can be used for remote voltage setpoint adjustment. On‑board trimpots allow fine‑tuning of gain, stability, and droop characteristics.

Durability and Compliance

Constructed with industrial‑grade semiconductors and encapsulated to resist moisture and vibration, the SSR 63-12 complies with IEC 60068 and UL 508 standards. Its proven design has been field‑tested in thousands of installations, offering long service life and minimal maintenance. Basler’s support ensures easy integration and operation.

In conclusion, the Basler Electric SSR 63-12 static voltage regulator provides dependable, precise excitation control for 600 V AC generators, backed by robust construction and flexible settings.