Harris ZX10, Technical Manual

Page: 48 / 198

2-4 888-2595-001 12/20/11
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WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
ZX Series
2.6 AC Mains Requirements
2.6.1 Transmitters with AC Distribution Chassis
Larger transmitters featuring the in-rack AC distribution chassis require only AC mains
connection to this chassis. All AC mains distribution within the transmitter is provided
by the chassis and its supporting mains cables. The AC distribution chassis has separate
versions for each of these three input voltage options:
•
Single-phase 190V - 264V*
•
Three-phase “delta” 190V - 264V
•
Three-phase “wye” 328V - 456V
NOTE:
As of this printing, the single-phase version has two mains inputs per cabinet: one
for the upper amplifier/exciter, one for the lower amplifier/exciter (when pres-
ent). This arrangement was chosen in the interest of providing AC mains redun-
dancy. Three phase models have a single connection point, but have AC mains
redundancy by virture of their three independent phases.
Connection to the AC distribution chassis is made at an insulated terminal block, which
may be accessed by pulling the chassis forward in the rack. See Figure 2-1. AC mains
cabling from the customer panelboard enters through an access hole in the roof of the
transmitter rack and passes along a hollow space near the rack side panel up to the side
entry of the AC distribution chassis. A label on the floor of the chassis, next to the
terminal block, indicates the proper connection points for the line (L), neutral (N), and
physical earth (PE) connectors (where applicable).