equipped with automatic voltage regulators (optional) capable of
correcting the primary potential.
All wiring and signal inputs are at the top of the cabinets.
Overhead cabling is used. No access is provided in the cabinet
floors.
AC power to the transmitter should be run in metallic conduit,
connected to earth ground for safety and to provide shielding
against interference. All phases should be run within the same
conduit to cancel induced magnetic fields. The power run must
be terminated in a power distribution panel, whose case must also
be connected to earth ground.
2.2.6
Circuit Breaker Selection
Refer to AC Distribution drawing and Recommended AC Circuit
Breaker drawing for the connection and breaker information.
Each cabinet is fed from the distribution panel through a separate
circuit breaker.
The transmitter requires a relatively stable source of input power.
For this reason, the primary power for the transmitter should
originate at the main power distribution system and remain
isolated from other electrical distributions.
Other input AC power requirements include the following:
2.2.7
Starting Surge Requirement
A short-duration starting surge, due to transformer inrush cur-
rent, will last for a portion of the first half-cycle after power is
turned on. During this half-cycle surge, the line voltage at the
cabinets must not drop below 80% of the rated line voltage. See
Recommended AC Circuit Breaker Drawing for sizing informa-
tion. A second surge of longer duration also occurs at power-on
and will last up to 10 cycles of the line frequency. During this
surge the equipment will draw 400% or more of the rated load.
The line voltage at the cabinets must not drop below 90% of the
rated line voltage during this 10-cycle surge.
2.2.8
Power Input Isolation
If a separate isolation transformer is used, it should be connected
to the highest potential primary source available to minimize
voltage fluctuations on the secondary. The isolation transformer
must have both primary and secondary taps so that power input
variations and changes in loads can be compensated. The isola-
tion transformer must maintain the rated output during the trans-
mitter starting surge. The transformer should be located as
closely as possible to the transmitter.
No load other than the transmitter should be connected to the
transformer secondary. The feed line to the transformer must be
protected by a main line circuit breaker to protect against a
transformer short.
Branch circuit breakers should be provided for peripheral equip-
ment and other loads. These loads should not be connected to the
secondary of the isolation transformer used for the transmitter.
Branch circuits should terminate within six feet of peripheral
equipment.
2.2.9
Disconnect Location
The circuit breaker panel should be located near the transmitter
in a well lighted area. As a safety precaution, controls for discon-
necting the main power service supplying the transmitter must
be convenient to the operator and maintenance personnel. Provi-
sions for emergency lighting should be made.
2.3
Unpacking and Equipment Inventory
When the transmitter is delivered to the site, the shipment should
be inspected and inventoried before installation is begun. This
section provides information to assist unpacking and inventory.
2.3.1
Inventory and Inspection
2.3.1.1
Packing Check List
Each transmitter shipment will be accompanied by a packing
check list identifying which equipment is packed in the various
crates and boxes. Be sure to locate this document when the
shipment arrives.
The contents of the shipment should be as indicated on the
packing lists. If the contents are incomplete, or if the unit is
damaged electrically or mechanically, notify the Harris Cus-
tomer Service Department by phone at 1-217-222-8200, or at the
following address:
Harris Corporation,
Broadcast Division
P.O. Box 4290
Quincy, Il 62305
Attn. Customer Service Department
The equipment becomes the property of the customer when the
unit is delivered to the carrier. Carefully unpack the unit and
perform a visual inspection to determine that no apparent damage
has been incurred during shipment. Retain all shipping materials
until it has been determined that no damage occurred during
shipment. Claims for damaged equipment must be filed
promptly; otherwise, the carrier may not accept the claim.
2.3.1.2
Factory Test Data Sheets
A set of factory test data is supplied with each transmitter. It lists
parameters for operation of the transmitter at your power level
and channel. These readings were recorded during factory test-
ing. Locate the test data, copy, and file the original so that copies
may be made as needed.
Record the same readings periodically to establish and maintain
an information base from which to work in the event of future
changes or problems.
2.3.2
Equipment Required for Unloading
Before the truck arrives with the new transmitter, have ready on
site a fork lift truck or a suitable unloading dock, a pallet jack,
heavy duty two wheel cart, and any other equipment necessary
to unload up to 1100 pounds (500 kg) at the site in question. The
cabinets and power supplies are too heavy to be safely unloaded
by hand.
2-2
888-2365-001
Rev. C: 8-24-2000
WARNING: Disconnect primary power prior to servicing.
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