Medium-voltage solid state reduced voltage controllers (SSRVC), type Series 81000™ up to 13.8 kV
As of October 1, 2008, our U.S. business is called Siemens Energy, Inc.
SSRVC description and features
Soft start advantages
Minimize system maintenance and repair
Reduce system downtime
Increase productivity
Minimize mechanical wear and tear on motor and driven equipment
Reduce inrush currents
Reduce motor starting current for prolonged motor life
Standard features
Drawout main fuses with fixed-mounted main contactor (800 A)
Bypass contactor capable of full-voltage start
Heavy duty soft start module
125% continuous duty rating (on soft start module only)
Digital microprocessor control with non-volatile memory
Fiber optic isolation
Advanced electronic motor protection
Metering
Alphanumeric LCD display
Keypad programming
Modbus RTU communications
Standard adjustment capabilities
Soft start and stop
Voltage and current ramp
Starting methods (settable)
Optional features
Flexibility
Safety
Reliability
Dependability
SSRVC ratings and dimensions
One line diagram
Maximum motor size | Voltage | Maximum FLA |
4000 HP | 10000 | 300 |
5500 HP | 13800 | 300 |
Starter dimensions (for estimating purposes only)
126" width x 90" height x 48" depth
AC supply voltage VAC +10% to -15% *** | SCR peak inverse voltage line voltage | SCR peak inverse voltage PIV rating | Series pair |
10000 | 10000 | 32500 | 5 |
11000 | 11000 | 39000 | 6 |
13800 | 13800 | 39000 | 6 |
Ambient operating temperature
0 - 40 °C ( 32 °F to 104 °F)
Overload ratings
Communications
RS485 or RS422 with Modbus RTU, RS422 protocol or Windows interface
Statistical data
Digital control unit
Programmable keypad / operator interface
Two lines x 20 characters backlit LCD display and non-volatile memory
LCD status / alarm LEDs (power, run, alarm, trip, aux 1-8)
Auxiliary contacts
Multiple form C contacts rated 5 A @ 240 Vac maximum
SSRVC metering
Percent of FLA
Phase currents
Average start time
Ground fault current
Remaining thermal register
Thermal capacity to start
Average start time & current
Measured capacity to start
Time since last start
Line Frequency
Phase order
Motor RPM (requires tach feedback option)
SSRVC motor and starter protection and programmable features
Motor and starter protection
Electronic overload | Two stage, programmable class 5-30 |
Phase loss | One or more phases missing |
Phase imbalance | Adjustable trip level with delay |
Phase reversal | Phase sequence varies from initial start |
Short circuit detection | Starting and running protection |
Over current | 100 - 300% of FLA with trip delay |
Under current / load loss | 10 - 90% of FLA with trip delay |
Over voltage | Trips at high line set point |
Under voltage | Trips at low line set point |
Shorted SCR | Internal fault detected |
Shunt trip | Prevents start if SCR(s) are shorted |
Starter over-temp | Thermal sensors on heatsink |
Ground fault2 | Alarm and two trip levels with trip delay |
Coast down lockout | 0 - 60 minutes following stop command |
Starts per hour lockout | 1 - 10 starts per hour |
Time between starts | 0 - 60 minutes between start attempts |
RTD inputs2 | 12 RTDs for motor / bearing protection |
Programmable features
Motor FLA | |
Dual ramp adjustments | Initial voltage; Current limit |
Two independent settings for | 0 - 100% of nominal voltage; 200 - 600% of motor FLA |
Acceleration time | 1 - 120 seconds |
Three custom curves | Via plotted torque / time axis points |
Deceleration time | 1 - 60 seconds |
Kick start | 0.1 - 2.0 seconds (10 - 100% voltage) |
Tach feedback1 | Closed loop speed ramp |
1 Requires Tach Feedback Option
2 Optional