Ametek SHZF2 SCR Series, Instruction, Operation And Maintenance Manual

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Installation SHZF2/SHZF3 SCR Power Controller
10 Ametek HDR Power Systems Rev 2
Figure 3.3 T1 Transformer Connections
2. Unsolder the Black/White wire on T1 from the voltage tap, and resolder it to the tap desired, as
shown in Table 3.2. Route the wires so that they are physically located under the transformer
terminals.
Table 3.2 Transformer Voltage Wiring
Desired Voltage T1 White &
Black Wire to
120 120
208 240
220 240
240 240
380 400
400 400
415 400
480 480
575 575
3. Close the unit, and apply line power. The unit is now ready for operation on the line voltage
selected. It is a good idea to identify the unit with a label or tag, noting that SHZF2/SHZF3 has
been modified for line voltage other than what it was specified for. This may prevent accidental
use on an incorrect line voltage in the future.
3.8 Options
UB Option, if ordered by the customer, has been installed and set up at the factory. However, the
current transformers (CTs) are shipped loose, they should be placed on the load lines when the load
lines are connected (first step in Chapter 3.2), and wired as indicated on the schematic (located in the
Appendix A) with the number of turns on Table 3.3.
Table 3.3 Current Transformer Turns
Current Rating Turns
15 A 4
25 A 2
30 A 2
60 - 225 A 1
Phase 1 CT connects to terminals 51 and 52; Phase 2 CT connects to terminals 53 and 54, and Phase
3 CT connects to terminals 55 and 56. Reference schematic in Appendix.