Woodward SPM-D10 Synchronizing Unit

Overview

The Woodward SPM-D10 is a microprocessor-based synchronizing unit for generator sets and other AC power sources. Using the appropriate discrete inputs it performs three functions: synchronization, synch-check and dead bus start. A single front-mounted display and three push buttons give access to configuration, and a PC configuration socket on the side of the unit allows setup from a computer. The unit mounts flush in a standard DIN panel cutout, so it fits into existing switchgear fronts easily.

In Oman, generators run in parallel with the grid or with each other at oil and gas camps, utilities, hospitals, ports and industrial sites, and every one of those connections needs a reliable breaker-closing decision. Seven Star LLC supplies the Woodward SPM-D10 with engineering support in Muscat, helping panel builders and maintenance teams source synchronizers together with related switchgear components such as the ABB VD4/P 12.20.40 vacuum circuit breaker.

Synchronizing Principle

Before a circuit breaker is closed, the voltage, frequency and phase angle on both sides of the breaker must agree. The Woodward SPM-D10 compares the generator voltage with the busbar or mains voltage and acts on its internal frequency and voltage controllers to bring the generator into line. When the conditions are inside the configured windows for the required time, it issues a close command to the circuit breaker through a relay contact. If the breaker cannot be closed within the configured synchronization time, a time monitoring function raises an alarm.

Two further modes use the same hardware. In synch-check mode the unit lets an operator close the breaker manually, but only when the phase and voltage conditions are acceptable. In dead bus start mode it permits the breaker to close without synchronization when the busbar is verified as de-energized.

Engineering Design of the Woodward SPM-D10

The model designation of the Woodward SPM-D10 encodes the measuring voltage and mounting, for example a 400 Vac unit with no current transformer inputs and flush mounting. Standard units use a 24 Vdc supply, while N and XN packages accept 90 to 250 Vac. The measuring inputs cover 40.0 to 70.0 Hz with class 1 accuracy, and the housing measures 144 x 72 x 122 mm with a 138 x 67 mm front cutout and a weight of about 800 g. Protection is IP42 from the front, IP54 with the gasket, and IP20 from the back.

The standard unit has three-position controller outputs for speed and for voltage. The X and XN packages add analog controller outputs, which can be configured as current, voltage or PWM signals for governors and voltage regulators, while the HJV package adds mains monitoring for over and under frequency, over and under voltage and phase or vector shift. Password protection guards the configuration, and a parameter list at the rear of the manual records the default and customer settings.

Key Features

The following capabilities define the Woodward SPM-D10:

• Synchronization, synch-check and dead bus start in one compact flush-mounted unit.
• Double voltage and frequency display on the LC display, with LEDs showing breaker status, automatic mode and phase and voltage deviation.
• Three-position speed and voltage controller outputs as standard, with raise and lower relay contacts.
• Optional analog current, voltage or PWM controller outputs through the X and XN packages.
• Optional mains monitoring with the HJV package, including phase and vector shift detection for mains decoupling.
• Configurable frequency and voltage controller dead bands, ramps, gain and reset settings for stable tuning.
• Wide-range 90 to 250 Vac power supply available with the N and XN packages.
• UL and cUL listing for ordinary locations and CE marking for European conformity.

Industrial Applications

Generator paralleling is routine across the Sultanate of Oman: diesel and gas engine sets at remote drilling and production camps, standby systems at hospitals and data facilities, and captive power plants in the Sohar and Salalah economic zones. The Woodward SPM-D10 suits these duties because it is small, easy to wire and works with a wide range of governors and automatic voltage regulators through its raise and lower or analog outputs.

Projects that need grid-parallel operation also benefit from the HJV mains monitoring package. Seven Star LLC supplies the Woodward SPM-D10 alongside protection and metering equipment such as the ABB REF542plus feeder protection and control relay and the Janitza UMG 508 universal measuring device, so electrical contractors can order synchronization, protection and metering from the same supplier.

Technical Specifications

The table summarizes data from the manufacturer manual for the Woodward SPM-D10. Always confirm the voltage code, package and part number against the manual before ordering.

Request a Quote for Woodward SPM-D10

To obtain a quotation for the Woodward SPM-D10, send a formal RFQ to the Seven Star LLC instrumentation team in Muscat stating the voltage code, package (X, N, XN or HJV) and quantity. We will confirm availability for Oman and the GCC, advise on compatible governors and regulators, and include the Woodward SPM-D10 manual and datasheet information with our quotation for your technical review.