VHD4.21 · AC Power Requirements
Current Draw
230 V Mode
Max Long Term Continuous
8 A rms
Burst Current
15 A rms
Short Term Peak
26 A peak
Current Requirements
Each VHD4.21 requires approximately 15 Amps max at 230V AC for proper operation.
The VHD4.21 presents a dynamic load to the AC mains, which causes the amount of current to uctuate depending
on quiet or loud operating levels. Since dierent cables and circuit breakers heat up at varying rates, it is essential to
understand the types of current ratings and how they correspond to circuit breaker and cable specifícations.
The maximum long-term continuous current consumption is the maximum rms current during a period of at least ten
seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to
electrical code standards. It is also used to select the rating for slowreacting thermal breakers.
The burst current consumption is the maximum rms current during a period of approximately one second, used to
select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the
formula: V pk (drop)= I pk x R (cable total).
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table
below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.
AC Cable Color Coding
If the colors referred to in the diagram don't correspond to the terminals in your plug, use the following guidelines:
Connect the blue wire to the terminal marked with a N or colored black. Connect the brown wire to the terminal marked
with an L or colored red. Connect the green and yellow wire to the terminal marked with an E or colored green or green and
yellow.
Power cable color coding
CAUTION: The VHD4.21 requires a ground connection. Always use a grounded outlet and plug.
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