The EM and EMS range of AC Voltage Stabilisers and Power Conditioners from Watford Control offers the most cost effective and efficient way to ensure a stable, undistorted mains supply for the vast majority of applications. Based on the proven electronic servo design, a double wound transformer has its secondary winding connected between the incoming AC supply and the load, with the primary winding voltage controlled by a motor-driven variable auto transformer. A solid-state servo amplifier continuously monitors the output voltage of the stabiliser, and any error voltage is amplified to operate the servomotor of the variable transformer, driving its brush-gear to a point where it is injecting a voltage that will correct the supply voltage by adding or subtracting from it. Over six thousand models span ratings from 1kVA to 8,000kVA, single or three-phase, incorporating full transient spike and noise suppression if required. Available with a wide selection of input voltage ranges from ±8% to ±40%.

IP AND EMO VOLTAGE STABILSERS

Designed for outdoor use.For outdoor use or any installation in humid or contaminated environments, a range of IP rated air-cooled stabilisers are available for mounting inside GRP enclosures with either naturally ventilated or forced air-cooling. The GRP enclosures can be designed to specific requirements to conform to the required IP rating. For smaller models up to 100kVA the oil immersion of stabilisers results in a more efficient cooling and a reduction in size compared to air-cooled stabilisers. They are available in both single and three phase models. The EMO range, are normally supplied suitable for ground mounting but some of the smaller versions are available for pole mounting.