Nautel NX100, Руководство по предварительной установке

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NX100 Pre-installation Manual Electrical requirements
Issue 3.2 2017-03-31 Page 5-1
Section 5: Electrical requirements
This section describes electrical power and electrical protection requirements associated with the
NX100 transmitter. This section includes the following topics:
• Electrical power
• Station reference ground - see page 5-9
Refer to Nautel’s Recommendations for Transmitter Site Preparation Manual for information about
requirements associated with lightning protection.
Electrical power
The transmitter is preconfigured to operate from a 50/60 Hz 3-phase, 3-wire plus ground, Wye or
closed delta ac power source. You select the specific voltage range when you order the transmitter.
Voltage stability
The ac power source nominal voltage must be stable to within plus or minus 15% under all loading
conditions. The transmitter contains circuitry that maintains the RF output at the preset carrier level
for voltage variations within the specified range, provided the correct transformer tap is chosen.
Power consumption
When operating at 100 kW with 100% modulation by a continuous sine wave, power consumption is
approximately 167 kW (171 kVA). When operating at 100 kW with no modulation, power
consumption is 111 kW. Power consumption for a specific station will depend on the programming
format and the level of audio processing. Nautel recommends the ac power source have a 25% over-
capacity to ensure adequate regulation.
Primary ac wiring
When operating at 100 kW with 100% modulation by a continuous sine wave, line currents are
approximately as shown in
Table 5.1 through Table 5.3 on page 5-2 . Use this information to
determine appropriate wire and breaker sizes for the ac input. NOTE: Primary wiring is provided by
the end user.
CAUTION: Technical pre-commissioning activities described in this section
require technical decisions and the customization of electrical circuits. Do
not attempt to perform these activities unless you are a certified
electrician.