
3. START--UP PROCEDURE
B--65245EN/02
START--UP PROCEDURE
10
The driving circuit of the servo amplifier unit employs an IGBT--based
pulse width modulation control method. So, a high--frequency leakage
current flows to ground through the stray capacitance against the ground
of the motor windings, power line, and servo amplifier unit. This leakage
current may cause the leakage current protection relay or ground fault
interrupter, installed on the power supply line, to malfunction. S o, use an
inverter--type ground fault interrupter designed to protect against such a
malfunction.
(1) Motor leakage current
Use the following data for reference:
Motor model Commercial frequency component
ϒ1toϒ6,
∼0.5 (ϒ0.5) to ∼2
∼C3 to ∼C6
∼3, ∼6, ∼M2, ∼M2.5, ∼M6, ∼M9,
∼L6, ∼L9
1.8mA
∼C12, ∼12, ∼C22, ∼22 2.0mA
∼30 2.5mA
3.2.2
Leakage C urrent and
Ground Fault
Interrupter