User Manual Chapter 1 - General Description
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1 Chapter 1 – General description 1.1 Introduction
The Network Power Switch is an automatic static transfer switch designed to provide fast automatic transfers between
two independent, synchronous AC power sources to provide continuity of AC power to critical equipment, such as
information technology equipment.
One of the two AC inputs is designed as the “preferred” source to which the Network Power Switch will connect the
load as long as the designated input source is within the acceptable limits, the Network Power Switch is designed to
transfer the output load to the “alternate “input source, as long as the alternate source is within the acceptable voltage
limits.
The Network Power Switch provides fast, break-before-make transfers to prevent interconnection of the two sources,
even under faulted source conditions.
The maximum sense and transfer times are within the tolerance of IEEE Standard 446 susceptibility curve for
information technology equipment to allow uninterrupted load equipment operation.
In case of overload, Network Power Switch gives the alarm. Under Short-circuit condition a fast acting semi conductor
fuse protects condition of the load.
Manual Bypass Switch
The entire power static switch module is hot swappable. Before removing this module the load is transferred, without
break to any one of the source directly by using the Manual bypass switch. After replacing the static switch module, the
load is restored on static switch module, using the Manual bypass switch.
Block Diagram
Fig 1.1 – Block Diagram of Network Power Switch
L1 BYP.
L2 BYP.
STATIC
SWITCH
L1
L2
MAN. BYP. SW
N1
N2
OUTPUT
NETWORK P OWER S WITC H
NEUTRAL
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