Liebert HiSwitch2 User Manual

Power Quality Systems

Liebert HiSwitch2

Digital Static Transfer Switch

Liebert HiSwitch2

The Cornerstone of
High-Availability Power System

The new Liebert HiSwitch2, solid-state digital bus transfer
switch from Emerson Network Power, is the enabling
technology behind dual-bus power systems. These devices
are connected between your critical load and the outputs
of two independent UPS (Uninterruptible Power Supply)
systems. If the primary UPS should fail, the switch will
automatically transfer the loads to the surviving UPS.

Liebert is the market leader in dual & multi-bus power
systems architecture, building the world’s most reliable
UPS and Static Transfer Switch products. The new
HiSwitch2 (Digital Static Transfer Switch) further extends
our market leadership with design benefits unmatched by
other products.

True Internal Redundancy

The HiSwitch2 has triple-redundant logic. Each DSP
(Digital Signal Processor) controller is capable of working
independently, and each helps monitor the other two. If
one malfunctions, the other two lock it out. Each controller
has power feeds from both power supplies.
The two power supplies feature true dual-bus power
distribution. Both have dual inputs, one from each AC input
source. All power connections have diode protection, so
that internal or external faults cannot propagate. The result
is a rugged, fault-resilient package that is optimized for
real-world applications.

True Front-Access Design

All mechanical and electronic components of the HiSwitch2
are accessible from the front of the unit. This gives you
several immediate benefits:

Greater freedom in system design. The HiSwitch2 can
be placed adjacent to or in back of other equipment.
It can also be placed against a wall or partition.

Simplified installation, with ample space for cable
connections through top and bottom access plates.

Less floor space required for maintenance access.
Simplified maintenance, with all key components visible

and accessible from the front of the unit.
225° front door’s opening angle for simplified operations

Complete Front-Access
Input Surge Protection
Optional Color Touch-Screen Monitor

Triple-redundant, Self-Correcting Logic

Internal Dual-Bus Control Power
Simplified Installation & Maintenance

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Liebert HiSwitch2 - Digital Static Transfer Switch

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