Woodward 9907-186 Load Distribution Module

FAQ

Q1: What is the primary function of the 9907-186 module?
A1: It distributes load among multiple generator sets operating in parallel, functioning in either isochronous or droop mode to ensure proportional load sharing.

Q2: What supply voltage is required?
A2: DC 24 V, with 3-phase PT and CT inputs for load sensing.

Q3: What type of output signal does it provide?
A3: +0.5 V to +4.5 V DC analog signal, proportional to the generator load, for controlling the speed regulator.

Q4: What is the difference between isochronous and droop modes?
A4:

• Isochronous: all generators maintain the same speed/frequency and share load proportionally.

• Droop: generator speed decreases with load, used for multiple generators in parallel or connection to an infinite bus.

Q5: What are the environmental requirements for operation?
A5: Install in a ventilated, low-vibration, and condensation-free environment; operating temperature –40 °C to +70 °C.

Q6: What precautions should be taken during installation?
A6: Ensure correct CT/PT phasing, proper grounding of shielded cables, appropriate cable lengths, and do not disconnect CTs while energized.

Q7: What are the module’s dimensions and weight?
A7: Dimensions 250 × 160 × 50 mm, weight 1.2 kg.

Q8: Can it be used with non-Woodward controllers?
A8: Yes, it can operate with other brands of speed controllers to achieve load sharing.

9907-186 Load Distribution Module Woodward

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