Mobile aluminum plant considering Alabama Power's Schedule FIS (Firm Industrial Service) vs Schedule IS (Interruptible Service). Need to analyze their load profile to determine curtailment capability. IS offers $8/kW discount but requires 30-minute response to interruption calls.
Alabama Power interval data for industrial interruptible rate
Biloxi client switched from firm to interruptible with Mississippi Power. Similar program. Saved $4,200/month but got interrupted 8 times last summer. Make sure plant can shut down major processes quickly without damaging equipment.
Virginia client on Dominion's interruptible rate learned the hard way. Failed to curtail during one interruption call and got hit with $15,000 penalty. Now they have automated load shedding system to ensure compliance.
Alabama Power IS program typically calls interruptions 5-10 times per year during peak summer afternoons. Need minimum 500kW load to qualify. Analyze 3 years of interval data to identify curtailable loads.
Plant has 1,200kW baseline load with ability to shut down 800kW of smelting operations within 30 minutes. Seems like good fit for interruptible rate. Potential savings around $6,000/month.
That's excellent curtailment capability. Make sure plant understands the compliance requirements and penalty structure. Alabama Power is strict about response times and load reduction verification.
Interruptible rate analysis requires detailed load profiling and operational assessment. The savings can be substantial, but customers must have reliable curtailment procedures to avoid penalties that can exceed annual savings.