11.13 Surge Suppression Units (SSU)
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11.13 Surge Suppression Units (SSU)
If the drive cable for the motor is long, an extremely small amount of surge voltage
(micro surge) will be generated at the motor connection end.
Surge voltage can cause problems such as motor degradation, dielectric
breakdown, or increased noise.
Surge suppression units can suppress surge voltage.
Surge suppression units can be connected regardless of the inverter capacity, and
wiring work can be carried out easily.
■ External drawings
• 50 m specification: SSU 50TA-NS
• 100 m specification: SSU 100TA-NS
■ Surge suppression unit benefits (motor line voltage waveform)
Motor, inverter capacity: 3.7 kW, wire length: 50 m, operating status: no load, power supply voltage: three-
phase 400 V
Motor, inverter capacity: 75 kW, wire length: 100 m, operating status: no load, power supply voltage: three-
phase 400 V
Surge suppression mechanism
Output terminal block
(with terminal block cover)
Output terminal block
(with terminal block cover)
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