ADC 70 - Manual (Page 29)

ADCP-80-524 • Issue 1 • November 2001
Page 29
© 2001, ADC Telecommunications, Inc.
4.13 Voltage Designation Label
Write
the voltage used in the fuse panel on the voltage designation label (see
Figure 9 )
and
attach
the label to the back of the panel.
5 TESTING
5.1 Quality Control
Each
unit is thoroughly tested at the ADC factory. The following tests are recommended,
however,
to assure that no damage has occurred during shipping or handling. Both bus A and
bus
B circuits need to be tested. The tests in
Subsection 5.2,
Resistance Test and
Subsection 5.3,
Wiring
Connections Torque Measurements must be performed without power applied to the
fuse
panel.
5.2 Resistance Test
Measure
the resistance at each bus input connector using a multi meter connected to the BATT
and
RTN input terminals. A resistance of at least 500 ohms should be read on the meter (some
meters
will indicate a resistance of several Megohms because their input voltage is not high
enough
to break down the forward conductance of the diodes used in the alarm circuit). Any
resistance
higher than 500 ohms is acceptable.
5.3 Wiring Connections Torque Measurements
Measure
the torque of all input, output, and fuse failure alarm relay contact connections
included
in the non-powered testing paragraphs above using a torque screwdriver that is
calibrated
in pound-force inches or Newton meters. The torque specifications are printed on the
rear
of the fuse panel adjacent to each connector.
5.4 Power Indication Test
After
checking input resistance and verifying the wiring connections torque, power may be
applied
to the fuse panel. Upon power application, the alarm indicators should not light unless
there
is a fuse that has failed. The alarm relay contacts should provide an open circuit between the
common
(C) terminals and the normally open (NO) terminals and a closed circuit between the
common
(C) and normally closed (NC) terminals.
Caution:
This equipment employs electrical voltage and amperage levels which may be
considered
an electrical hazard. Care should be exercised to assure that only qualified personnel
are
allowed to install, operate, maintain, or otherwise come in contact with the fuse panel when
it
is energized. Only insulated tools should be used on energized elements of the panel.
Caution:
Before performing this test, verify that the input and output power is not applied to the
fuse
panel connectors,