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Digidrive SK Technical Data
www.leroy-somer.com Issue Number: a
9.11 Frequency accuracy
0.01%
9.12 Resolution
0.1Hz
9.13 Output frequency range
0 to 1500Hz
9.14 Starts per hour
Electric starts
With the supply permanently connected the number of electronic motor starts per hour is only limited by motor and drive thermal limits.
Power starts
The number of starts by connection of the ac supply is limited. The start up circuit will allow for three consecutive starts at 3-second intervals on initial
power up. Exceeding the rated number of starts per hour, presented in the table below, could result in damage to the start up circuit.
9.15 Start-up time
The soft-start circuit must charge the dc bus and SMPS outputs and stabilise to allow the control processor to start operation in the following times:-
9.16 Serial communications
Modbus RTU
9.17 Switching frequencies
The software allows for the following switching frequencies:
Size A & B: 3, 6, 12, 18kHz
Size C: 3, 6, 12kHz
9.18 Harmonics
The Digidrive SK industrial AC variable speed drives are classified as class A professional equipment as defined in BS EN61000-3-2: 1995. Drives
with input power equal to or below 1kW that do not meet the requirements of EN61000-3-2 are to be corrected, to ensure compliance, at the point of
installation using suitable AC line chokes. See 7.1 (Reactor current ratings)
9.19 Acoustic noise
Drive frame size
Maximum AC line starts per hour
evenly spaced in time
A, B & C
20
Drive frame size
Maximum time taken to charge DC bus
and SMPS outputs to stabilise
A, B & C
1s
Frame
Power ratings
Condition
Max SPL measurement (dBA)
A
All ratings
N/A
None contributed by drive (no fan).
B
≤
0.75kW
N/A
None contributed by drive (no fan).
B
≥
1.1kW
rd mode, fan on
50
C
All ratings
rd mode, fan on
53