UPS Maintenance Bypass Assembly with Digital Control
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Solution Overview
Problem
Current maintenance bypass systems for Uninterruptable Power Supplies (UPS) rely on manual procedures and key-lock systems, which are prone to human error and do not adequately prevent unintended power interruptions or ensure safe state transitions, potentially causing equipment damage and safety hazards during maintenance or repairs.
Innovation Solution
A digital processor-controlled Maintenance Bypass Assembly (MBA) with remotely actuated circuit breakers and a graphical display that senses the status of the UPS and MBA, allowing for safe and controlled reconfiguration of power flow between input and output interfaces, preventing state changes that could result in damage or power interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual key-lock systems are used for maintenance bypass, then device complexity is reduced, but reliability deteriorates due to human error and inadequate prevention of unintended power interruptions
Solution Approach 1:
The patent replaces manual key-lock mechanical systems with an automated digital processor-controlled system. The digital processor monitors system state, controls circuit breaker operations, and prevents unintended power interruptions through automated logic, eliminating human error while maintaining operational control.
Solution Approach 2:
The system incorporates feedback mechanisms where the digital processor continuously senses the status of the UPS and MBA, monitors circuit breaker positions, and adjusts control actions based on real-time system conditions. This feedback loop ensures reliable prevention of unintended power interruptions while managing system complexity through intelligent control.
2Reliability
If remotely actuated circuit breakers with digital control are implemented, then reliability improves through automated control, but device complexity increases
Solution Approach 1:
The digital processor serves multiple functions: it senses system status, controls multiple circuit breakers, provides graphical display information, and implements safety logic. By consolidating these functions into a single multi-functional controller, the system achieves high reliability through automated control while minimizing the increase in overall device complexity.
3Productivity
If automated sequenced control of circuit breakers is used, then productivity improves through faster maintenance operations, but device complexity increases
Solution Approach 1:
The digital processor pre-establishes the correct sequence for circuit breaker operations and automatically executes this predetermined sequence during maintenance operations. This preliminary programming of the operation sequence enables fast, automated maintenance procedures without requiring complex real-time decision-making logic, thus improving productivity with moderate complexity increase.
4Ease of operation
If graphical display with status sensing is implemented, then ease of operation improves through better monitoring, but device complexity increases
Solution Approach 1:
The graphical display system automatically senses and displays the status of the UPS and MBA without requiring manual intervention. The digital processor continuously monitors system parameters and updates the display accordingly, enabling operators to easily monitor system state while minimizing the complexity of the interface through automated self-updating displays.
Data Source
AI summary
Where an Uninterruptable Power Supply (UPS) is used in a system to ensure highly reliable power supply to an electronic system, occasional maintenance or repair of the UPS or its storage batteries may be required. Effecting this servicing while ensuring that the utility power continues to be supplied to the load may involve a Maintenance Bypass Assembly (MBA) comprising a plurality of manually-operated circuit breakers. The possibility of an incorrect actuation of such circuit breakers is precluded by the coordination of a plurality of electromechanically actuated circuit breakers in communication with a controller that may store a table of permitted state transitions and sequences for safe operation. Such operation may be confirmed by one or more sensors monitored by the controller.