Recent NEC updates require fire pump controllers to be protected with surge protective devices. This life-safety equipment is composed of intricate electronics that are susceptible to disruptions and damage caused by transient voltage.
Fire pumps are critical pieces of equipment within a fire sprinkler system. The devices are an integral part of supplying water pressure to the sprinkler system and assuring it’s proper and effective function.
Pumps can be powered via electric motors, diesel engines and occasionally steam turbines. Backup generators and transfer switches may also be part of the system where electric motors are used.
The purpose of this critical equipment is to maintain water pressure within the emergency sprinkler system of the building or structure it services.
When a sprinkler system operates, it can reduce the water pressure within the system. If this is the case, a pump needs to be used. To maintain required pressure in the system, the pump kicks in when the pressure drops below a certain level.
Building or structure designs largely determine the requirement and implementation of fire pumps. Because of their size, large buildings and tall structures typically require the addition of these devices.
Because of height or physical size of many buildings, the available supplied water pressure is usually not enough to assure effective and required level of sprinkler system operation.
Changes to the National Electrical Code in 2017 added Surge Protection requirements to protect Fire Pump Controllers. Click NEC Surge Protection Updates to view.
Controllers are the sensitive electronics of a pump system. The controllers are contained inside of panels/cabinets. In general, these panel designs provide...
These are critical functions that make the pump and sprinkler system operate effectively and consistently.
Various types of pump applications for Controllers can include:
For additional information on controllers, view this short UL article.
These panels and cabinets need to be protected with properly designed, high quality, high performance surge protectors.
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