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Case Study
Does your generator take too long to start after a power failure?

What kind of power solution can provide uninterrupted long-term power backup?

Food Manufacturer Company A (200 Employees)
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Problem
  • When a power failure occurs, it takes 40 seconds for the generator to start, and there is a risk of fire.
  • In the event of a power failure, the power supply must continue uninterrupted for at least 20 minutes to allow the equipment to shut down safely.
  • When UPSs and generators are installed separately, combined system operation is not guaranteed.
Solution and Results
  • In the event of a power failure, the combination of a SANUPS E23A UPS and a SANUPS G53A generator provides uninterrupted long-term power backup.
  • The UPS and generator are supplied by the same company, and all systems in the lineup have been tested for combined operation.
  • Along with UPSs and generators, full maintenance and support services are available.

Large typhoons and torrential rains cause major damage in many places each year. The most common damage from natural disasters is power failures. As natural disasters are becoming more frequent due to climate change, more and more companies are developing business continuity plans to protect their business operations.

Problem

If the exhaust system of a commercial oven is shut down by a power failure, the risk of fire in bakeries increases

Company A manufactures and sells bread and confectionery. They had a problem with power failure countermeasures at their factory. Ms. E, manager of the production management department, shared her experiences with us:
"Our factory used generators to back up the power for commercial ovens. However, we once had a small fire due to a power failure. The power failure stopped the exhaust system, and it took about 40 seconds for the generator to start. During that time, the temperature in the commercial oven rose, and the oils in the food turned into a gas which ignited, then when the generator started, oxygen entered through the exhaust system and caused a fire. In addition, even if it doesn't lead to a fire, if the conveyor burns out and stops working, the production line will stop, requiring extensive work to restart the machines."

To prevent such risks, it was necessary to continue supplying electricity continuously in the event of a power failure and provide power backup for more than 20 minutes to allow the temperature of the oven to fall to safe levels.
Therefore, Ms. E examined combining a UPS and a generator. However, since UPSs and generators are usually only separately guaranteed by their respective manufacturers. She was worried because, when a UPS and a generator were installed separately, neither manufacturer would guarantee the operation of the combination of the two.

Solution and Results

UPS and generators both supplied by the same company, all combination systems have been confirmed to work together

Mr. E, who was looking for a manufacturer that could guarantee the operation of the UPS and generator combination, was introduced to SANYO DENKI by a trading company she was dealing with.
After listening to her problems, the SANYO DENKI sales representative proposed the SANUPS-SS power solution.
"It was exactly what we were looking for, a solution that provided the best combination of UPS and generator. Both UPS and generator were supplied by SANYO DENKI, and all systems in the lineup had been tested in combination, so I knew I could install them with confidence," exclaimed Ms. E.

Provides both uninterrupted and long-term power backup in power failures

The SANUPS-SS lineup has UPS variations with single-phase 2-wire 100 and 200 V models and 3-phase 3-wire 200 V models. We selected the combination of a SANUPS E23A UPS and SANUPS G53A generator, which are 3-phase 3-wire 200 V models.
Ms. E immediately examined it in-house and confirmed the reliability of the SANUPS-SS power supply solution.
The SANUPS E23A uses a parallel processing method to charge the battery while supplying power from the commercial power supply during normal operation. When a power failure occurs, it switches to battery power without interruption and starts backup.
When the generator also detects a power failure, it starts automatically and supplies power to the UPS after the output is stabilized, and continues supplying backup power while simultaneously charging the battery. This allows long-term power backup without stopping the exhaust system when power failures occur," exclaimed Ms. E.

System flow diagram (1) Normal time

System flow diagram (2) When a power failure occurs

System flow diagram (3) During power failure

Soon after, Company A decided to adopt the SANUPS-SS power supply solution and installed it in their factory.
"Before delivery, we visited the SANYO DENKI factory to witness and inspect the actual operation, so we could install the system with confidence. Also, with an on-site maintenance service* contract, necessary parts will be replaced during periodic inspections, and we can contact the manufacturer about any problems 24 hours a day, 365 days a year. The support for both the UPS and the generator has been excellent, and we have been using them with peace of mind since they were installed. I am satisfied that we are fully prepared. I will continue to consult SANYO DENKI in the future," enthused Ms. E.

* On-site maintenance service: To keep SANUPS products functioning at their best, we offer a variety of on-site maintenance services to meet the needs of our customers. Contact us for details.

Date of publication: December 16, 2020

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