SAF OPAL SS6 - Manual (Page 9)

OPAL SS6 Reduced Voltage Starters
Page 2
1.1.2 OPTIONAL FEATURES
- Solid State Reversing
Through the addition of 4 Silicon Controlled Rectifiers ( SCR's ) and a reversing card,
smooth motor reversing is achieved without having to stop the motor.
- Soft Stop
Motor deceleration is controlled to eliminate water hammer effect on pump applications.
- By-Pass Contactor
Once the motor has reached operational speed, the by-pass contactor is closed. This shorts
the SCR's which eliminates the voltage drop across the SCR's, in turn being more efficient
and ridding excess heat.
- Up-To-Speed Contact / Shear Pin Protection / Energy Saver
- Shorted SCR Sensor and Protection
Sensor detects shorted SCR and trips circuit breaker or contactor upstream.
- Linear Accel\Decel Card
Provides linear accel and decel independent of load with the use of speed feedback
- DC Injection Braking
Through the addition of 4 SCR's and a DC Injection card, adjustable braking of an AC motor
is performed. More information is provided in the OP-STOP, DC INJECTION manual.
- External Reset Push Button
- Start, Stop, Reverse Push Buttons
- NEMA 4 or NEMA 12 Enclosures
1.2 APPLICATION NOTES
1.2.1 OPERATION MODES
1.2.1.1 Constant Current Mode
Applications
*Compressors
*Empty Mixers
*Empty Crushers
*Chippers
*Pumps/Fans
*Centrifuges