Xtreme Power Conversion Corporation
XBDM-1520RHW User’s Manual
Page 6
Bypass Distribution Module
Introduction
The information provided in this manual covers single phase hardwired 15/20A bypass distribution module, its
basic functions, operating procedures, options available and emergency situations. It also includes information on
how to ship, store, handle, and install the equipment. Only detailed requirements of the XBDM unit are described
herein, and installation must be carried out in accordance with this manual. Refer to the associated UPS manual for
UPS operating instructions. Electrical installation must also carefully follow local legislation and regulations. Only
qualified personnel should conduct these installations as failure to acknowledge electrical hazards could prove to
be fatal.
Product Description
Many different kinds of sensitive electrical equipment can be protected by an Uninterruptible Power Supply (UPS)
including computers, workstations, process control systems, telecommunications systems, sales terminals, other
critical instrumentation, etc. The purpose of the XBDM is to provide an extra level of protection in allowing for the
replacement of a UPS without powering down the loads connected. The XBDM can work with most single phase
topologies. It will not work with topologies that have a phase shift between input and output (like ferro of UPS
with an isolation transformer).
Electrical interference exists in many forms, causing problems in AC power, from lightning, power company ac-
cidents and radio transmission motors, air conditioners, and vending machines. Protection of sensitive electrical
equipment is vital to protect against power outages, low or high voltage conditions, slow voltage fluctuations,
frequency variations, differential and common-mode noise, transients, etc.
To prevent power line problems from reaching critical systems causing damage to software, hardware, and equip-
ment malfunctions, the UPS maintains constant voltage, isolating critical load output and cleaning the utility AC
power. When a UPS fails or needs maintenance, many times it is necessary to turn off the UPS and disconnect it
from incoming electrical circuits. With the XBDM installed between the incoming Utility and the UPS, you can re-
place the UPS and/or Batteries without dropping the load. You simply switch the XBDM from UPS power to Utility
power and remove the UPS while the load connected to the XBDM continues to operate temporarily from Utility
power.
Bypass Distribution Description
The Xtreme Bypass Distribution Module (XBDM) is designed to operate with a single-phase UPS up to 30Amps in
output capacity. The XBDM allows you to:
• Replace or upgrade the UPS without losing power to the protected equipment
• Provide surge protection if the UPS is not present
• Provide extra surge protection when the UPS is present
As shown in the block diagram below:
• Under normal operation, the UTILITY INPUT flows through the XBDM to the UPS and then out to the CON-
NECTED LOADS.
