Woodward 5501-381 the third mock examination redundant power board card

Woodward 5501-381 the third mock examination redundant power board card

5501-381 is a Woodward MicroNet TMR series the third mock examination redundant power board card. Belonging to the core power supply unit of MicroNet TMR turbine digital electro-hydraulic control system.

5501-381 is installed in the MicroNet TMR system power supply chassis. After converting, filtering, and stabilizing the external 220VAC AC input through AC-DC, it provides stable and reliable low-voltage DC working power for the CPU module, I/O module, and communication module in the system through the backplane bus; The 5501 ‑ 381 adopts a the third mock examination redundancy (TMR) architecture. The three power boards operate independently and the load is evenly distributed. When any one or two power supplies fail, the remaining power supply automatically takes over at full load, ensuring that the control system does not shut down due to a single point of power failure; 5501-381 has a maximum input power of 1250VA, with a power outage holding time of one AC cycle, and short-term grid fluctuations do not affect the continuous operation of the system; Built in 10A delay circuit breaker/fuse input protection to prevent overcurrent damage to backend equipment; It is the power supply core board of MicroNet TMR high reliability steam turbine control system. In case of failure, it can cause the loss of corresponding redundant circuit power supply, decrease system redundancy, and in severe cases, trigger control circuit power loss.

Parameter Specifications

Woodward 5501-381 the third mock examination redundant power board card

Product features

1.  the third mock examination Redundancy (TMR) power board card design, three power supplies operate at the same time, and the load is equally divided. Any fault of one power supply does not affect the system power supply, meeting the high reliability requirements of the turbine protection system; The board supports hot swappable replacement, and there is no need for system shutdown when replacing faulty power supplies.
2. 220VAC high-voltage AC input, 47-63Hz broadband adaptive, suitable for different global power grid standards; The maximum input power is 1250VA, the maximum input current is 6.7A, and the power margin is sufficient to meet the full configuration module power supply requirements of the MicroNet TMR system.
3. It has a Holdup Time of one AC cycle, which ensures uninterrupted power output during brief grid fluctuations or instantaneous power outages, avoiding control system misoperation or restart due to transient voltage drops, and improving on-site operational stability.
4. Built in 10A delay circuit breaker/fuse input protection, automatically cuts off the input in case of overcurrent or short circuit, preventing the fault from expanding and damaging the backend control module; Equipped with surge suppression and EMI filtering on the input side, suitable for harmonic interference environments in power plant grids.
5. Board type structure, directly inserted into the MicroNet TMR power chassis backplane, completes power output and status signal interaction through backplane connectors without external wiring; The onboard power status indicator light and fault alarm contact point, when the power supply is abnormal, report to the main control CPU through the backplane and trigger the system alarm.

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