First Solar PGT 4 Substation

The site/building projected electrical demand indicates that the site would require a Customer Owned substation.

The substation was designed to provide a 138kV to 12.47kV transformation via 2-30 MVA transformers.

The substation was developed in concert with a Utility Detailed Load Study and their recommendations and requirements for design.

Items that were included are:

• Primary 145kV dead tank circuit breaker
• High Speed Ground Switch
• Primary Utility revenue metering CT’s/PT’s
• Provisions for CCVT’s (provides ability for Customer to install on-site generation in the future)
• Overhead busway
• Transformer 145kV primary dead tank circuit breaker (Each transformer)
• 30MVA transformer and associated devices
• 2-3000A 15kV distribution switchgear (each transformer)
• All relay and protection settings for 15kV circuits
• Coordination of all protection elements with Utility metering and protection departments
• Witness and coordination with Utility and 3rd Party Commissioning
• 14 – 15kV distribution feeder loops that provide a redundant loop thru the site and building power distribution requirements.