Lowell Manufacturing Company | 05-10-18
UPS-XBDM-20RHW Manual
Page 6
Introducon
The informaon provided in this manual covers single phase hardwired 20A bypass distribuon module, its basic
funcons, operang procedures, opons available and emergency situaons. It also includes informaon on how
to ship, store, handle, and install the equipment. Only detailed requirements of the XBDM unit are described
herein, and installaon must be carried out in accordance with this manual. Refer to the associated UPS manual for
UPS operang instrucons. Electrical installaon must also carefully follow local legislaon and regulaons. Only
qualied personnel should conduct these installaons as failure to acknowledge electrical hazards could prove to
be fatal.
Product Descripon
Many dierent kinds of sensive electrical equipment can be protected by an Uninterrupble Power Supply (UPS)
including computers, workstaons, process control systems, telecommunicaons systems, sales terminals, other
crical instrumentaon, etc. The purpose of the XBDM is to provide an extra level of protecon 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 shi between input and output (like ferro of UPS
with an isolaon transformer).
Electrical interference exists in many forms, causing problems in AC power, from lightning, power company ac-
cidents and radio transmission motors, air condioners, and vending machines. Protecon of sensive electrical
equipment is vital to protect against power outages, low or high voltage condions, slow voltage uctuaons,
frequency variaons, dierenal and common-mode noise, transients, etc.
To prevent power line problems from reaching crical systems causing damage to soware, hardware, and equip-
ment malfuncons, a UPS maintains constant voltage, isolang crical load output and cleaning the ulity AC pow-
er. When the UPS fails or needs maintenance, many mes it is necessary to turn o the UPS and disconnect it from
incoming electrical circuits. With the XBDM installed between the incoming Ulity and the UPS, you can replace
the UPS and/or Baeries without dropping the load. You simply switch the XBDM from UPS power to Ulity power
and remove the UPS while the load connected to the XBDM connues to operate temporarily from Ulity power.
Bypass Distribuon Descripon
The Bypass Distribuon Module (XBDM) is designed to operate with a single-phase UPS up to 20Amps in output
capacity. The XBDM allows you to:
• Replace or upgrade the UPS without losing power to the protected equipment
• Provide surge protecon if the UPS is not present
• Provide extra surge protecon when the UPS is present
