4611 Safety Standards

Safety standards are important to continue the safe operation of distribution systems. Changes in other requirements should not unduly compromise safety standards. Safe operation is a concern of the host utility, the owners of distributed generation, and the operators of these facilities. Safety standards implemented by most electric utilities have a long history. Safety must not be unduly compromised in order to implement distributed generation in the State of Texas. However, in order to facilitate installation of distributed generation, flexibility in implementing the present standards of the electric utilities is needed. This flexibility should be focused on allowing installation of products and devices that meet the intent of the safety standards, although they may not meet a particular utility's historical practices and standards.

A device shall be in put in place for the purpose of isolating the source of generation from the utility system. This device should have the ability to physically disconnect the distributed generation source from the utility system. The device should provide for a visible disconnect to provide easy and sure confirmation of the switch status to a utility troubleshooting patrolman. The device shall be capable of interrupting full load current and shall be lock-able in the open position. This device shall be accessible by the host utility on a 24-hour basis. The device may be a disconnect switch, a draw-out breaker, fuse block, or other commonly used means of physical isolation. These devices must be able to be controlled on-site and may have the capability for remote control.

The generation system must meet all applicable governmental standards: national, state, and local construction and safety standards. These do not include standard utility policies and practices. The local distribution utility may direct the generator to disconnect completely from the system due to abnormal system conditions, such as system outages, emergencies, and equipment maintenance and repairs on the utility system.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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