SPECIFICATIONS
Part Number: 5501-466
Manufacturer: Woodward
Product type: Simplex Power Supply
Operating range: 18 to 36 Vdc
Nominal voltage rating: 20 to 32 Vdc
Maximum current: 29.5 A
Maximum power: 531 W
Input power fuse/breaker rating: 50 A time delay
Availability: In Stock
Country of Manufacture: United States (USA)
Functional Description
5501-466 is a Simplex Power Supply developed by Woodward. The power supply unit is equipped with a set of four LEDs that serve as indicators to communicate the health status of the power supply. These LEDs are specifically designed to convey crucial information about the power supply's operational condition. The four LEDs represent distinct states: OK, Input Fault, Overtemperature, and Power Supply Fault. It's essential to recognize that the power supplies associated with the control system lack input power switches as a built-in feature. This design characteristic emphasizes the need for an alternative mechanism to disconnect input power for each main power supply during installation and servicing procedures. This precaution is vital to ensure the safety of technicians and maintenance personnel who might be working on the power supply unit.
Features
- To facilitate easy connectivity and accessibility, the input power connections are conveniently located on the front of the power supply. This arrangement ensures that users can readily access the terminals to establish the necessary input power connections, simplifying the overall installation process.
- For scenarios that require redundancy and increased reliability, the power supply unit allows for flexible configuration. The control system can make use of any combination of power supplies to ensure seamless operation even if one power supply experiences issues. This adaptability means that multiple power supplies can be employed simultaneously to share the load or act as backups, enhancing system resilience.
- In terms of physical placement, the power supplies can only be inserted into specific slots known as PA1 (power supply 1) and PA2 (power supply 2). This arrangement ensures proper compatibility and efficient functioning of the power supply units within the larger system architecture.
- In response to this requirement, an effective solution involves the inclusion of a dedicated means to disconnect the input power. This mechanism can come in the form of either a circuit breaker or a separate switch. Whichever option is chosen, it must meet the specified requirements to ensure both compatibility and safety within the system.
- When opting for a circuit breaker as the disconnecting device, it's important to ensure that it adheres to the prescribed criteria. These criteria encompass ratings that are aligned with the operational demands of the power supply unit. Additionally, considering the possibility of electrical faults or overloads, the circuit breaker should be equipped with time-delay functionality. This time-delay feature helps prevent nuisance trips unwanted interruptions due to transient fluctuations that might occur during regular operation.
- Alternatively, the use of a separate switch as the disconnecting mechanism is also a valid approach. Similar to the circuit breaker option, this switch must possess ratings that are in accordance with the power supply unit's requirements. The ratings pertain to factors such as voltage, current, and load capacity.
- By choosing either a circuit breaker or a separate switch that adheres to the specified ratings and incorporates time-delay capabilities, the power supply installation and servicing process can be undertaken with the utmost safety and efficiency. This diligent approach to providing a reliable means of disconnecting input power underscores the commitment to maintaining a secure working environment for maintenance personnel while minimizing the likelihood of disruptions caused by nuisance trips.
Input Power Wiring
- It's important to emphasize the significance of a fixed wiring installation specifically designed for alternating current (AC) applications. This type of installation serves as the foundation for the proper functioning and safety of the control system. In order to meet safety standards and ensure reliable operation, particular attention must be paid to certain electrical parameters.
- One key parameter is ground leakage. In MicroNet control systems, ground leakage exceeding 3.5 milliamperes (mA) of AC current is not permissible. This threshold is established to maintain a safe and efficient operational environment, minimizing the risk of electrical hazards or malfunctions.
- Within the scope of AC installations, a maximum ground leakage limit of 7.2 mA at a frequency of 60 Hz is defined. This upper limit is designed to prevent excessive electrical leakage that could compromise the integrity of the system or pose a safety risk to users and technicians.
- To ensure proper grounding and enhance safety measures, it is mandatory to establish a ground conductor that is securely connected to the control system's chassis. This grounding mechanism provides a vital path for the dissipation of electrical charges, reducing the likelihood of static buildup and the associated risks.
- Moreover, the control system's power supply grounding terminal(s) also require a connection to the earth grounding system. This practice not only contributes to the overall grounding of the system but also ensures that the power supply's printed circuit boards are effectively grounded. Proper grounding of these components is essential to prevent potential electrical issues and enhance the control system's stability and longevity.
- In line with safety regulations, it's essential to maintain consistency in the size of the grounding conductor. This conductor should match the size of the main supply conductors to ensure that it can handle the same current loads and maintain electrical integrity throughout the system.
World of Controls has the most comprehensive selection of GE and Woodward components. Our professionals are available to help you with your requirements at any time. If you require any additional information, please contact WOC immediately.
Frequently Asked Questions
What is 5501-466?
It is an MicroNet Simplex Power Supply developed by Woodward.
Is it advisable to connect both MicroNet main power supplies of a redundant pair to a single source?
No, it is not recommended to connect both MicroNet main power supplies of a redundant pair to a single source. This configuration is discouraged because if the single source were to fail, it would result in the disabling of the entire system due to the loss of both redundant supplies.
How do redundant MicroNet supplies distribute the load and ensure system stability?
Redundant MicroNet supplies distribute the load evenly between them, enhancing system stability and reliability. Each redundant supply is designed to handle the full load in the event that the other supply becomes disabled.
Why is it important to size the grounding conductor the same as the main supply conductors?
Sizing the grounding conductor to be the same as the main supply conductors ensures that it can handle the same current loads. This maintains consistency in electrical integrity and safety throughout the system.
