C
HAPTER
4 - M
AINTENANCE
BDS5
4-2
If the short circuit inrush
current generated by the
power source is in excess of
5000 amps RMS symmetrical
current, an isolation
transformer or line inductor
must be utilized in the
incoming power circuit.
Failure to observe this
precaution could result in
damage to, or destruction of
the PSR4/5 and BDS5.
Input transformers step up or step down input voltage
and can be either autotransformers or isolation
transformers. Isolation transformers help eliminate
the following:
•
Damaging AC line voltage transients reaching
the PSR4/5 and BDS5.
•
Damaging currents which may develop if a
point inside the PSR4/5 or BDS5 becomes
grounded.
4.2.3 Electrical Noise
The low levels of energy in the BDS5 control circuits
may cause them to be vulnerable to electrical noise.
Sources of electrical noise are those pieces of
equipment that have large, fast changing voltages and
currents when they switch on and off. These devices
have the capability of inducing critical current and
voltage transients on their respective power lines.
These transients must be accommodated for with
noise immunity provisions.
Electrical noise is prevented with the same methods
as Surge Current and Transient Voltages. However,
there are other methods of preventing electrical noise.
Such as:
•
Maintain physical separation between electrical
noise sources and the BDS5 amplifier.
•
Maintain physical separation between electrical
noise sources and the BDS5 control wiring.
This can be accomplished by using separate
conduits or wiring trays for control wiring and
power wiring.
•
Use twisted-pair wiring for control circuits of
the BDS5.
•
Follow good grounding practices when wiring
the PSR4/5 and BDS5. Be careful not to create
a grounding loop with multiple ground paths.
Follow the NEC's provisions on grounding.
4.2.4 Radio Frequency Energy
This equipment generates
radio frequency energy.
This equipment uses, and can radiate radio frequency
energy and must be installed and used in accordance
with this installation and service manual in order to
prevent possible interference with radio
communications or other electronic equipment.
4.3 PERIODIC MAINTENANCE
Periodically you will need to inspect your equipment
for possible problems to insure ongoing safe and
efficient operation. Periodic maintenance should be
performed at scheduled intervals to insure proper
equipment performance. It must be performed by
qualified personnel familiar with the construction,
operation, and hazards involved with the BDS5 and
its application. Power should be disconnected during
all maintenance procedures.
4.3.1 Ventilation
The PSR4/5 and BDS5 should be mounted vertically
to allow maximum ventilation of the components.
This configuration allows the heat generated by the
components to vent through the top and draft in
cooler air through the bottom. The top and bottom of
the components are vented to allow this drafting to
occur. These ventilation passages should be kept
open. If the PSR4/5 requires auxiliary cooling with
fans, inspect the fans on a regular basis.
CAUTION
NOTE
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