have sufficient voltage to "push" the desired test current through the device. The
operator should start with the
parallel connection and move to the series connection
only when necessary. To operate the test set
in
the parallel connection does not
require any changes be made by the operator. However the test set in series
requires that a special adapter be placed on the output stab adapter boards to
complete the series connection.
See figures below.
I
I
I
I
PARALLEL
SERIES
-
NOTE: When the output
of
the test set is
in
a series configuration, cabling must
be
used to connect the output
of
the test set to the test specimen.
B.
OUTPUT CONNECTIONS: Both models DDA-3000/6000 Test Sets are equipped··
with an AVO International Stab Adapter Board and AVO International CBS-1 and
CBS-2 Stab Sets which accommodate direct engagement
of
many drawout type
circuit breakers to the test set without the use
of
leads. Additionally, stabs are
available for breakers not accommodated by the
CBS-1 and CBS-2 stabs. Contact
the factory for further details
or
refer to the specification section.
When testing devices which cannot be connected directly to the stabs
of
the DDA-
3000/6000 Series Test Sets, it will be necessary to use test leads. When using high
current test leads, it may be necessary to connect the output
of
the test set
in
series
(see Section IV, 2, A on PARALLEL AND SERIES OPERATION).
The
following
information on the selection
of
output leads will provide the
user
with a guide for
choosing the proper test
leads for his application.
Due to the
voltage drop from the inductive reactance
of
the test circuit, a significant
15
To Next Page
Loading...
Need help?
General
