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Woodward 8440-1849 D DTSC-50 Digital Transfer Switch Controller

The Woodward 8440-1849 D is an intelligent microprocessing device engineered to handle automated power transition infrastructure between a primary utility source and an auxiliary emergency generator.When the local utility station suffers a voltage drop, phase loss, or total outage, the 8440-1849 D senses the fault immediately via true RMS monitoring and commands the standby generator to crank.

Once the engine achieves nominal speed and voltage stability, the controller manages the open-transition sequence—disconnecting the main line before clamping the load over to the generator bus. When stable grid utility is restored, the DTSC-50 smoothly handles the reverse transfer, initiating an adjustable engine cooldown sequence before returning the engine to standby alert.Housed in a fully enclosed, compact shell with a multi-window 7-segment LED front facade, it isolates breaker feedback paths through internal software interlocks, entirely eliminating the risk of dual-source cross-conduction.

• True RMS Phase Checking: Tracks exact phase-by-phase voltage and frequency values on both inputs, preventing erratic transfers caused by grid harmonic noise or voltage waveshape sags.

• Cranking Voltage Resiliency: The internal power supply stage tolerates severe battery dips down to 6.5 Vdc, ensuring the controller does not reboot during demanding engine starter engagement cycles.

• Integrated Statistical Logging: Tracks and archives essential maintenance statistics directly on local memory chips, including cumulative engine operating hours, service timers, and total transfer switch counts.

• Flexible Diagnostic HMI: Employs explicit front-panel LEDs to visualize active breaker position feedback and live source availability instantly, supplemented by numeric error code displays for rapid troubleshooting.

• Dual Setup Architecture: Permits flexible controller calibration protocols via physical soft-keys directly on the front panel or through a secure serial PC interface using Woodward ToolKit connectivity.

• Emergency Standby Power Stations: Regulates automatic transfer switch panels inside telecommunication hubs and manufacturing plants.

• Commercial Building Switchgear: Fits into localized infrastructure control enclosures to switch building loads over to emergency backup diesel groups.

• Compact Industrial Gen-Sets: Serves as the primary power monitoring component on packaged standalone generator units.

Q1: Can the 8440-1849 D be used for closed-transition (parallel/overlap) transfer switch control?

A: No, the 8440-1849 D is fundamentally restricted to open-transition ("break-before-make") operation modes. For applications requiring active phase synchronization and overlapping source switching, alternative Woodward units like the easYgen series must be used.

Q2: How does the controller verify breaker positioning to prevent short circuits?

A: The unit uses designated discrete inputs connected directly to the auxiliary feedback switches of the utility and generator breakers. Its internal logic enforces a rigorous hardware-and-software interlock, preventing a close command if the alternative source contact remains closed.

Q3: What parameters can be hand-adjusted directly from the front panel facade?

A: Users can access the password-protected configuration layer to adjust grid failure delay timers, engine warm-up durations, under/over-voltage trip thresholds, and generator cooldown cycles without needing a PC connection.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.