PowerWalker VFI 20000-40000TAP 3/3 BI, User Manual

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The UPS has many standard features that provide cost-effective and consistently reliable power protection.
The descriptions in this section provide a brief overview of the UPS standard features.
1.1.1 Installation Features
Power wiring can be routed to the bottom or rear of the cabinet with connections made to easily accessible
terminals. Some models (
VFI 20000TAP 3/3 BI / VFI 30000TAP 3/3 BI / VFI 40000TAP 3/3 BI ) provide rear-only cable
access. Details in 4.4 section of user manual.
1.1.2 Control Panel
The control panel, located on the front of the UPS, contains a liquid crystal display (LCD) and pushbutton
switches to control the operation of the UPS and to display the status of the UPS system. See Chapter 6,
“UPS Operating Instructions,” for additional information.
1.1.3 Customer Interface
• Building Alarm Monitoring – Up to three inputs in the UPS are available to connect the facility's alarm
system contacts. Some system configurations may limit the number of inputs available. The UPS uses
these inputs to monitor the building alarms in addition to the UPS status. See Chapter 7,
“Communication,” for additional information.
• Mini-Slot Communication Bays – Two communication bays are standard equipment. One to two optional
Mini-Slot connectivity cards can be installed in the UPS module at any time. Mini-Slot cards are quickly
installed at the front (behind door) of the UPS and are hot-pluggable. See Chapter 7, “Communication,” for
additional information.
1.1 UPS Standard Features
1.1.4 High-Efficiency Mode
The PowerWalker VFI 3/3 Series UPS offers a High-Efficiency (HE) normal mode with double-conversion
on demand that allows the UPS to operate in standby bypass mode. This mode allows the PowerWalker
VFI 3/3 Series UPS to achieve 98% efficiency while still protecting the load. See Chapter 6, “UPS
Operating Instructions,” for additional information. On setting the UPS to work in High Efficiency mode.
1.1.5 Intelligent Charging Management
A three-stage charging system increases battery service life by optimising recharge time, and protects
batteries from damage due to high current charging and inverter ripple currents. Charging at high currents can
overheat and damage batteries.
1.1.6 Maintenance Bypass
The internal Maintenance Bypass for VFI 20000-80000TAP 3/3 BE/BI models consists of input, output and
bypass input (Dual feeds) switches used to control the AC input to the UPS the inverter output, and a
Maintenance Bypass switch used to partially isolate the UPS so that a limited number of components can be
serviced without interrupting power to critical systems.