Fuji Electric FRENIC-Ace series, User Manual

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11.12 Surge Suppression Unit (SSU)
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Chap 1
1
11.12 Surge Suppression Unit (SSU)
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Dimensions
• 50 m spec: SSU 50TA -NS • 100 m spec: SSU 100TA -NS
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Effects of surge suppression units (voltage waveform between motors)
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Basic specifications
Item Specifications
Type SSU 50TA-NS SSU 100TA-NS
Applicable wiring length
Up to 50 m (164 ft) Up to 100 m (328 ft)
Power supply voltage
200 V and 400 V classes; PWM converter is applicable.
Inverter capacity
Up to 75 kW (90 kW or larger requires customized service.)
Output frequency Up to 400 Hz
Carrier frequency Up to 15 kHz (Cannot be used 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 min
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 inverter capacities and easy wiring work.
Surge suppression mechanism
Pulse
Surge suppression unit
Surge absorption
Power
supply
• Motor/inverter capacity: 3.7 kW
• Running status: No-load
• Wiring length: 50 m
• Power supply voltage:
Three-phase 400 V
• Motor/inverter capacity: 75 kW
• Running status: No-load
• Wiring length: 100 m
• Power supply voltage:
Three-phase 400 V