Nautel NX100, Руководство по предварительной установке

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NX100 Pre-installation Manual Electrical requirements
Page 5-4 Issue 3.2 2017-03-31
Secondary ac wiring
The following information pertains to the wiring, cable connectors and cable tray support system,
between the external power transformer cabinet and the main transmitter cabinets.
Overview.
See Figure 5.1 . The NX100 transmitter requires a 3-phase, 400 V ac source, capable of
providing 171 kVA. The transmitter consists of a main cabinet (rack) and an external power
transformer. The transformer’s secondary supplies three-phase ac power (4-wire: X1, X2, X3, X0) to
the main cabinet. A single-point ground connection is required between the transformer cabinet and
the transmitter’s station reference ground, located on top of the main cabinet. This ac power is
applied to a 3-phase rectifier assembly in the main cabinet.
Figure 5.1: Transformer to Transmitter Interconnect Wiring
Additionally, the main cabinet contains a single-phase 2 kW logic supply that receives its ac input
from one of the three phases and X0.
Note:
It is highly recommended that you purchase suitable wiring, hardware and cable trays from
Nautel. If you decide to purchase these items from an alternate vendor, it is imperative that you
read and understand the information presented in this section, as it provides specific part
information as well as insight into some of Nautel’s design philosophy behind the interconnect
wiring requirements.
Do not
use the provided secondary wiring in place of primary wiring.
WARNING: DO NOT connect the X0 terminal of the power transformer
to ground. Blown fuses and possible damage to the 3-phase SCR may
result.
H3
*
**
A C
B
COAX
H1
X2 X3
X0 ***
RACK
GROUND
REFERENCE
FROM
350 KVA
400V, 3 PHASE
S2070227 V1
H2
TO RACK
6"
X0
1/0 (GREEN) ***
535 MCM *
535 MCM *
REFERENCE
GROUND
STATION
X1 T1
1/0 **
535 MCM *
TRANSMITTER
SHIELD
CABLE TRAY
TO GROUND!
DO NOT CONNECT X0
DENOTES PART # NL WT02 1/0 DLO
CROSS SECTION
DENOTES PART # NL WT01 1/0 DLO
DENOTES PART # NL WT04 535 MCM DLO