Key Information of Woodward SPM-A Synchronizer Model 9907-028
The 9907-028 is a variant of the Woodward SPM‑A Synchronizer, designed for generator synchronization applications. 9907-028 matches the speed and phase of an off‑line generator with another generator or the utility bus before paralleling, and 9907-028 automatically issues a circuit breaker closure signal when conditions (frequency, phase, and voltage, if applicable) meet requirements.
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Core Technical Specifications
Parameter | Specifications |
Frequency Compatibility | 50/60 Hz |
Phase Match Window | ±10° |
Voltage Matching | None (no voltage matching function; focuses on frequency and phase synchronization) |
Input Voltage | 115 Vac or 230 Vac rms (50/60 Hz), with ±10% voltage tolerance |
Power Consumption | Maximum 5 W |
Dwell Time (Match-up Time) | Field-selectable: 1/8, 1/4, 1/2, or 1 second (factory default: 1/2 second) |
Operating Temperature Range | -45 to +70 °C (-49 to +158 °F); optimal range: +10 to +30 °C (+50 to +86 °F) |
Weight | 2.2 kg (5 lbs) |
Output & Control Compatibility
4.1 Control Output Options
High Impedance Output: For single-unit synchronization with Woodward 2301 load sharing controls (terminals 20 (±) and 21 (common)).
Low Impedance Output: For single-unit synchronization with Woodward 2301A, EPG, 2500 load sharing controls, or EGA/EGM controls with external resistors (terminals 22 (±) and 21 (common)).
EPG Output: For Woodward EPG controls without load sensing (terminals 24 (±) to EPG terminal 10; terminal 23 (common) to EPG terminal 5).
4.2 Breaker Closure Relay
Contact Type: Normally open (NO) contacts.
Contact Ratings:
Resistive Loads: 10 A at 28 Vdc; 3 A at 120 Vac (50/60 Hz).
Inductive Loads: 6 A at 28 Vdc; 2 A at 120 Vac (50/60 Hz).
Command Duration: Approximately 1 second (after conditions are met).
If you have any PLC DCS inquiries, please contact Cheryl freely
