Phone: (714) 970-2304 Fax: (909) 930-3335
Web Page:
www.DSPManufacturing.com
Email:
6
SECTION 1- OPERATION
1-1 INTRODUCTION
The DEFENDER UPS (uninterruptible power system) from DSPM provides an
exceptional level of load protection and monitoring capabilities. The critical load is
provided with conditioned, regulated, battery backed up power at all times. Both the
voltage level and frequency are controlled at all times to the load.
When the input power is lost to the UPS, such as during a power outage, the UPS
automatically draws power from its battery supply. The critical load receives only clean
sine wave power at all times. There are no disturbances or power interruptions on the
output when the UPS transfers to battery operation. Transfers to and from battery
operations are “No Break” transfers. The internal maintenance-free batteries provide a
few minutes to hours (depending upon model) of backup power. Upon restoration of
input power, the UPS automatically resumes normal operation. Also the UPS
immediately begins to recharge the batteries.
The DEFENDER is a dual conversion three phase UPS available in output ratings of 5
to 50 kVA. The UPS is U.L. listed under UL1778 and/or UL924. The UPS is available
with input voltages of 208 and 480 VAC; and output voltages of 120, 208, 480 and 277
VAC (Other voltages available, consult factory). This information is provided on the
nameplate located on the inside of the front door.
