Pump Controls

Over the years, advancements in technology have significantly evolved the design and functionality of fire pump controls. These systems have transitioned from bulky, slate-backed electrical switchgear to compact, computer-controlled units equipped with digital user interfaces, achieving greater efficiency and sophistication in a much smaller footprint.

Diesel engine controllers come in two types: 12-volt DC and 24-volt DC, both featuring a standard negative ground configuration.

For electric motor controllers, there's a range from single-phase models suitable for motors up to 15 horsepower to three-phase versions for motors as powerful as 300 horsepower. In systems powered by electric motors, when backup power is in place, the Automatic Transfer Switch (ATS) must be certified for fire pump use, as per regulations. Control makers provide a certified transfer switch as an integral component of their electric control offerings.

Additionally, electric controllers offer a variable speed feature through the use of a variable frequency drive (VFD). It's important to note that VFD controls typically require a longer production time compared to standard controls and are also considerably larger in size. These VFD controls are procured as special orders directly from the manufacturer.

Jockey pump controllers operate by detecting pressure changes using a transducer and usually employ an across-the-line startup method, though alternative methods are also offered. In certain setups, an external disconnect switch in the fire pump control circuit might be recommended or mandated. These external disconnect switches, conforming to NFPA 70 (National Electrical Code) § 695.4(B)(2)(a)(2) specifications, are supplied by the control manufacturers.