Voltage Dip Proofing
VOLTAGE-DIP PROOFING INVERTERS PREVENT
PRODUCTION DOWNTIME CAUSED BY MOMENTARY POWER
reliability of power to industry is high, momentary power interruptions and
voltage sags still occur. These may be caused naturally, by lightning strikes,
snow storms and overgrown vegetation or artificially, by heavy load switching,
short circuits and automatic re-closures.
As these interruptions are generally less than
one second in duration, most industrial
installations and plants are able to ride
through such power dips by virtue of their
electrical and mechanical inertia. This is not
the case with electrically held-in contactors
and relays that control the machinery. These
usually drop out after a few milliseconds, and
as a result, the plant or process has to be
The VOLTAGE DIP-PROOFING INVERTER™ (DPI) offers a maintenance-free solution to
facilities that suffer from costly and inconvenient disruption of critical
production processes. The DPI maintains AC control voltage to switchboards and
motor control centres during momentary power dips and voltage sags by supplying
standby power to such items as contactors, relays, PLCs, and other sensitive
No batteries; therefore, no replacement and
maintenance costs or hazardous waste.
More reliable; fast (<700µS) transfer,
off-line system develops little heat & fails
Able to withstand high inrush currents; no
need to oversize as with UPS's & CVT's.
Lightweight, small & easy to retrofit; no
step-up transformers or batteries.
Accurate application control; adjustable
ride through time & variable transfer level.
Designed for inductive and low power factor
Losses incurred by these power quality problems far outweigh the cost of
installing the DPI and investment payback is achieved in a relatively short
period of time. It is designed specifically for use in industrial and commercial
environments and unlike other equipment, offers a preventative rather than
For more information on the
DPI Product Range see our
Dip Proofing Inverter catalogue.