Fuji Electric FRENIC-AQUA series, User Manual

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4.4 Options
4-37
Chap. 4
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4.4.1.4 Surge suppression unit (SSU)
„ Effects of installing the surge suppression units (shown by voltage waveform between motors)
„ Basic specifications
Item Specifications
Type SSU 50TA-NS SSU 100TA-NS
Applicable wiring length 50 m or shorter 100 m or longer
Power supply voltage 200 V and 400 V classes, PWM converter is applicable
Inverter capacity 75 kW or below
Output frequency 400 Hz or below
Carrier frequency 15 kHz or below (The SSU is not available at 16 kHz.)
Enclosure IP20
Installation environment
Ambient temperature: -20 to +40
°
C, Relative humidity: 85% RH or below,
Vibration: 0.7 G or less, Installation: Horizontally
Dielectric strength voltage 2500 VAC, 1 minute
If the drive wire for the motor is long, an extremely low surge voltage (micro surge) occurs
at the wire end connected to the motor. Surge voltage causes motor degradation, insulation
breakdown, or increased noises. The surge suppression unit (SSU) suppresses the surge
voltage. It features the connectivity for all motor capacities and easy wiring work.
„ Dimensions
•
50 m spec.:
SSU 50TA-NS
•
100 m spec.:
SSU 100TA-NS
Motor/inverter capacity: 3.7 kW
Wiring length: 50 m
Running status: No-load
Power supply voltage: Three-phase 400 V
Motor/inverter capacity: 75 kW
Wiring length: 100 m
Running status: No-load
Power supply voltage: Three-phase 400 V