UFR1001E G99/98 compliant Loss of Mains Relay

The UFR1001E system-disconnection relay monitors voltage and frequency in single or three-phase networks.

• Presetting per G99/98, values as per the standard pre programmed

• Under and overvoltage monitoring 40…520 V

Under and over frequency monitoring 45…65 Hz

• Monitoring of Rate of Change of Frequency (ROCOF, df/dt)

• Monitoring the voltage quality (10 minute average value)

Response time adjustable 0.05 … 130.0 s, individual setting for each limit

• Fail-safe, with monitoring of the connected section switch (can be switched off) 2 automatic restarts on error

• Supports the mains synchronisation when using generators

• Measurement 3 phase 3 or 4 wire systems or single phase

Self-test

• Third Part Independently tested Compliant to G99/98 by Bureau Veritas

Pumped Storage Hydro Energy Plant Plan For Tennessee

Tennessee Valley Authority is asking for public input on the scopes of environmental reviews for three generation projects, including a pumped storage hydro plant. These environmental reviews are the first steps in considering potential environmental impacts of projects that would support a cleaner energy future, while maintaining affordability, reliability and resiliency.

First, TVA said it is studying various technologies to store energy, including pumped storage hydroelectricity. TVA will need longduration energy storage to meet energy demand as more intermittent renewable energy sources are added to the grid.

TVA is developing a Programmatic Environmental Impact Statement (PEIS) to increase pumped storage hydropower capacity within its power service area.

The PEIS will evaluate the potential environmental and economic impacts of several options, which include expanding the existing 1,652 MW pumped storage facility at Raccoon Mountain or constructing a new pumped storage facility at one of two locations in Jackson County, Ala.

Public comment is invited about the scope of the PEIS, alternatives being considered, and environmental issues which should be addressed.

The other two projects for which TVA is seeking input are a solar and battery storage project and a natural gas combustion turbine and battery energy storage system.

TVA has a strategic goal to add 10,000 MW of solar by 2035. To facilitate this goal TVA is developing new guidance to help review solar energy and battery storage projects that could be built on private and TVA-owned land in its service area. TVA is now preparing a PEIS to help develop new guidance and a bounding analysis.