15
Installation
Transformer output voltage drop may become a limiting factor at motor speeds and loads near
maximum ratings. Typically, higher KVA transformers have lower voltage drop due to lower
impedance.
Line Fusing and Wire Size
You must incorporate over current protection for the incoming AC power with the minimum
rating shown here. Control Techniques recommends Bussman type: KTK-R, RK1or
equivalent.
* This is at 20% derated drive output only current as required when using single-phase AC power.
Input Power Connections
According to UL requirements, the EN drive is suitable for use on a circuit capable of
delivering not more than 5000 RMS symmetrical amperes, 240 volts maximum.
Drive Model External AC Line Fuse
Recommended Minimum AC/PE Line Wire
Gauge
EN-204 KTK-R 15 Amp 1Ø 14 AWG
EN-208 RK1 20 Amp 1Ø 12 AWG
EN-214 RK1 20 Amp 3Ø 12 AWG
Drive Model
Input Voltage
(VAC)
Frequency
(Hz)
Input Current
(Amps RMS) at
full drive output
current
Inrush Current (Amps)
1st Cycle 2nd Cycle
1 Ø 3 Ø
EN-204 90 - 264 / 1 Ø
47 - 63
9.5 A - 140 (8ms) 50 (8 ms)
EN-208 90 - 264 / 1 Ø 19 A - 140 (8ms) 50 (8 ms)
EN-214 90 - 264 / 1 - 3 Ø 20 A* 14 A 100 (5 ms) 3 Ø 40 (5 ms) 3 Ø
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