Installation
3-3
Part 1089210A04
E 2010 Nordson Corporation
Power Supply Electrical Connections
Power Connections
NOTE: Power must be supplied from a dedicated power line.
The customer power source must be wired in accordance with either the
National Electric Code, Part I or the Canadian Electrical Code, Part I, or
local codes. At a minimum, 10 AWG 600 volt wire is required unless
superceded by local codes. Four #10−32 studs provide for line connection.
Refer to the power supply ID plate for the input voltage and verify the
transformer tap wiring using 3-1 and 3-2. Measure the incoming power
source voltage from the main power supply. Incoming voltage transients
shall not exceed 150 volt amplitude and have a frequency content of less
than 500 Hz.
S The power line input is three phase (three wire with ground).
S There are two large high-voltage transformers in the power supply.
Each has a terminal block with H1, H2, and H3 terminals. Refer to
Table 3-1.
S The power for the control electronics is provided from transformer T3. If
an internal blower is used, a larger T3 is required. Both transformers
have the same voltage range tap selections, as shown in Table 3-2.
S The transformer taps must be set in the same range. Only the taps on
the two identical power transformers need to be changed.
Table 3-1 High Voltage Transformer Taps (T1 and T2)
Voltage Range Transformer Tap
440−480 H1−H3
380−440 H1−H2
Table 3-2 Control Transformer Taps (T3)
Voltage Transformer Tap
480 H1 and H4
400 H1 and H3
380 H1 and H2
Front of Power Supply
High VoltageHigh Voltage
T2
T1
T3
Control Transformer
External Blower
Transformer T3
Internal Blower
Transformer T3
Figure 3-2 Transformers Identified in Power Supply
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