Woodward 9905-946 Automatic Synchronizer

FAQ

Q1: What is the main function of the Woodward 9905-946 Automatic Synchronizer?
A1: The 9905-946 automatically matches the generator’s frequency, voltage, and phase angle with the bus or another generator, ensuring safe and smooth synchronization before circuit breaker closure.

Q2: How does the 9905-946 achieve synchronization accuracy?
A2: It uses digital phase-locking algorithms to continuously compare the generator and bus parameters, adjusting speed and excitation until the phase difference is within ±1°.

Q3: What type of systems can this synchronizer be used with?
A3: The module is suitable for use with diesel and gas engine-driven generators, turbine systems, and marine power management systems requiring automatic synchronization.

Q4: Can the 9905-946 be integrated with external control systems?
A4: Yes, it includes an RS-232 communication interface allowing integration with Woodward governors, voltage regulators, and supervisory control systems.

Q5: What happens if the synchronizer detects unsafe synchronization conditions?
A5: If voltage, frequency, or phase deviation exceeds preset limits, the unit blocks breaker closure and indicates a synchronization fault to prevent equipment damage.

Q6: How does the device handle dual or parallel generator operation?
A6: It can manage parallel operation by automatically synchronizing multiple generators sequentially to a common bus, ensuring balanced load sharing after synchronization.

Q7: Is there a manual synchronization option available?
A7: Yes, the 9905-946 supports manual control through front panel switches or remote operator panels for field calibration or emergency operation.

Q8: What are common applications of the Woodward 9905-946 Automatic Synchronizer?
A8: It is commonly used in power plants, industrial generator systems, marine vessels, and backup power installations where precise and safe generator synchronization is essential.

9905-946 Automatic Synchronizer Woodward

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