Nautel NX50, Installation Manual

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NX50 Installation Manual Installing the power transformer
Issue 6.1 2021-07-13 Page 3-1
Section 3: Installing the power
transformer
1. Before placing the transformer into the transmitter, set the line voltage tap selections.
Based on your nominal line to line voltage, select the appropriate tap position
identified on the labels mounted on the terminal board end of the transformer. One
label identifies the tap number and the line-to-line voltage. Another label identifies the
tap. All phases must be set to the same tap (see also Figure 3.1 , Figure 3.2 on page 3-2
and Table 3.1 on page 3-2 ). If necessary, use the hardware already on each of the three
copper straps to connect the straps to the new tap positions. Be sure to scrape any
excess epoxy off the electrical joint area.
Figure 3.1: NX50 power transformer line voltage tap layout (350 - 510 V or 570 - 630 V)
5
4
3
2
1
Load 3
Line 3 Load 2 Line 2 Load 1
Line 1
6
Load 0