Ground Leakage - Leroy-Somer Digidrive SK Serie Guía De Usuario

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To avoid a fire hazard and maintain validity of the UL listing, adhere to the specified
tightening torques for the power and ground terminals. Refer to the table below.
WARNING
Frame size
A
B and C
Braking resistor: High temperatures and overload protection
Braking resistors can reach high temperatures. Locate braking resistors so that damage
cannot result. Use cable having insulation capable of withstanding the high temperatures.
WARNING
It is essential that an overload protection device is incorporated in the braking resistor
circuit. This can either be an external overload device fitted in the braking circuit or an
internal thermostat device fitted within the resistor.
Figure 4-1 and Figure 4-2 show a typical circuit arrangement for braking resistor protection.
The thermal protection device must disconnect the AC supply from the drive if the resistor
becomes overloaded. Do not use overload opening contact in line with the braking resistor.
WARNING
When connecting single phase to a dual rated 200V unit, use terminals L1 and L3.
NOTE
For control terminal connections, see Pr 05 on page 67.
NOTE
For information on the internal EMC filter, see section 4.3.1 Internal EMC filter .
NOTE
4.2

Ground leakage

The ground leakage current depends upon the internal EMC filter being fitted. The drive
is supplied with the filter fitted. Instructions for removal of the internal EMC filter are
given in section 4.3.2 Removing the internal EMC filter .
With internal EMC filter fitted
30µA DC (10MΩ internal bleed resistor, relevant where DC leakage current is being measured)
Size A
10mA AC at 230V, 50Hz (proportional to supply voltage and frequency)
Size B and C
1 phase 200V drives
20mA AC at 230V, 50Hz (proportional to supply voltage and frequency)
3 phase 200V drives
8mA AC at 230V, 50Hz (proportional to supply voltage and frequency)
3 phase 400V drives
8.2mA AC at 415V, 50Hz (proportional to supply voltage and frequency)
The above leakage currents are just the leakage currents of the drive with the internal EMC
NOTE
filter connected and do not take into account any leakage currents of the motor or motor cable.
With internal EMC filter removed
<1mA
In both cases, there is an internal voltage surge suppression device connected to
NOTE
ground. Under normal circumstances, this carries negligible current.
Digidrive SK Getting Started Guide
Issue Number: a
English Deutsch
Maximum power terminal screw torque
0.5 N m / 4.4 lb in
1.4 N m / 12.1 lb in
Italiano Español
57