The source changeovers ensure, in an optimized volume, the energy availability in critical electrical installations.
• Maximum continuity of service
• Optimized energy management
• Simplicity of the system based on pre-tested components
For maximum continuity of service you can see below different types of source changeover systems:
• Manual source-changeover system: This is the most simple type. It is controlled manually by an operator and consequently the time required to switch from the normal to the replacement source can vary. A manual source-changeover system is made up of two or three mechanically interlocked manually-operated circuit breakers or switch-disconnectors
• Remote-operated source-changeover system: This is the most commonly employed system for devices with high ratings (above 400 A). No human intervention is required. Transfer from the normal to the replacement source is controlled electrically. A remote-controlled source-changeover system is made up of two or three circuit breakers or switch-disconnectors linked by an electrical interlocking system that may have different configurations. In addition, a mechanical interlocking system protects against electrical malfunctions or incorrect manual operations.
• Automatic source-changeover systems An automatic controller may be added to a remote-operated source-changeover system for automatic source control according to programmable operating modes. This solution ensures optimum energy management:
- transfer to a replacement source according to external requirements
- management of power sources
- emergency source replacement, etc
The communication option must not be used to control the opening or closing of source-changeover system circuit breakers. It should be used only to transmit measurement data or circuit-breaker status.