Emerson Control Techniques Focus 3N User Manual page 78

Single phase, uni-directional non-regenerative dc drive
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Solution #2 – Isolation Transformer
120 / 240
VAC Input
Transformer KVA = 1.5 x Rated Armature Current x 120 Vac (or 240)
Example :
Your DC Motor has a 10 A armature
KVA = 1.5 x 10 A x 120 Vac = 2.4 KVA (use 2.5 KVA)
Page 72
Isolation Transformer
120 / 240
VAC Output
DO NOT CONNECT GROUND
TO TRANSFORMER SECONDARY
L1
Focus 3 Non-regen
DC Drive
Heat Sink
L2
GND Lug
TB2
12

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