UPS Maintenance Bypass Panels
All UPS Installations benefit when an external "Make Before Break" Maintenance Bypass Panel is included. The reason is that critical equipment powered by a UPS typically cannot be shut down to allow servicing or repair of the UPS. The cost is minimal compared to costs and risks of downtime when an external maintenance bypass is not included. Many UPS manufacturers incorporate an "Internal Maintenance Bypass Circuit". Keep in mind if internal this will be a partial bypass, not a total bypass. The better design is having an external, thus total, bypass. Increasingly, safety rules for service work dictate that serviced equipment must be off, an internal maintenance bypass does not allow this.
The most common configuration (out of 15) for external maintenance bypass is a three breaker panel, dual input UPS. Other configurations include two breaker, four breaker and custom configurations in which the output is a defined set of multiple breakers to allow the UPS to feed multiple load panels without requiring an additional distribution panel. With our engineering background we help clients determine the best configuration for a specific installation.
Specific Bypass Panel Drawings are available in the table below by clicking on a part number.
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