Control Techniques Emerson Focus 1 - Solutions Requiring Isolation - Isolation Transformer; Isolation Transformer KVA Calculation

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Solution #2 – Isolation Transformer
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)
DO NOT CONNECT GROUND
TO TRANSFORMER SECONDARY
Focus 1
DC Motor
Controller
L1
L2
L1
L2
A2
A1
M