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[ 5 ] 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 (164 ft) or shorter 100 m (328 ft) or shorter
Power supply voltage 200 V and 400 V classes, PWM converter is applicable
Inverter capacity 75 kW (100 HP) or below (For 90 kW (125 HP) or above, individually
treated.)
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 temp.: -20 to +40°C (-4 to 104°F),
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 (164 ft) spec.: SSU 50TA-NS • 100 m (328 ft) spec.: SSU 100TA-NS
Motor/inverter capacity: 3.7 kW (5 HP)
Running status: No-load
Wiring length: 50 m (164 ft)
Power supply voltage: Three-phase 400 V
Motor/inverter capacity: 75 kW (100 HP)
Running status: No-load
Wiring length: 100 m (328 ft)
Power supply voltage: Three-phase 400 V
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