Softstarters Type SSM, Medium voltage 2300 – 4160V Specification Guide Low Voltage Products & Systems
SSM Series Medium Voltage Solid State Soft Starter 2300 – 4160V, 200 – 600A Overview: This detailed Specification Guide assists Plant and Consulting Engineers to specify and describe the ABB SSM Series Digital Reduced Voltage Solid State Starter. This equipment is provided as a superior method of providing soft start control and protection for AC motors.
Softstarters Type SSM Specification Guide Type SSM Medium voltage Installation & maintenance manual Introduction....................................................................................................... 2 2.0 Codes & Standards.................................................................................. 2 3.0 Product Features..................................................................................... 2 A. Motor and Load Protection . ................................................
Type SSM Specification Guide 1.0 Introduction This specification describes the performance, functional specifications and fabrication details for a digital reduced voltage, stepless, solid state medium voltage motor starter that shall provide a selectable voltage ramp, current limit or current ramp (all standard) method of soft starting 3-phase AC induction motors.
Type SSM Specification Guide (d) Separate Trip Curves shall be provided for Start and Run, allowing a higher level curve to avoid nuisance tripping during acceleration, but dropping to another level for accurate motor protection while at full speed. To maximize flexibility, each trip curve shall be programmable as follows: (i) Basic, using the NEMA Class ranges described above. (ii) Locked Rotor programmable between 400 – 800% of FLA, and a trip time from 1–– 30 seconds.
Type SSM Specification Guide (b) LOSET Trip level preset at 7% with a 1 – 20 second delay. (c) HISET Trip level preset at 10% with an 8 – 250 millisecond delay. 7) Line Frequency Window shall be programmable from a 1 – 6Hz variance from the nominal line frequency as entered by the user. It shall provide an adjustable trip delay of 1 – 20 seconds. 8) Coast Down Lockout shall be provided to prevent restarting of the motor during backspin or other dangerous mechanical conditions after shutting off.
Type SSM Specification Guide 3) Stop Voltage Level: adjustable from 100 – 0% of line voltage to automatically turn off the starter when the output torque has reached a desired level. Programming shall not allow the Stop level to be set higher than the Step Down Level. External timers shall not be needed to turn off the starter. 4) Selectable Operation During Overload shall be available to allow the user to decide if the motor shall turn off or continue to Decel when an overload condition is detected.
Type SSM Specification Guide (d) RTD Relay (when RTD Input option is ordered) including Stator or Non-Stator Trip and/or Warning, and RTD Failure. 2) Analog Outputs (2) shall be included for providing information to external controls and be programmable as RMS Current or Percentage of Motor FLA. (a) If the Tach Feedback Starting option is used, the Analog outputs can be programmed as RPM.
Type SSM Specification Guide 18) Statistics including Elapsed Run Time, Total Trips, Trips on Short Circuit, Start O/L, Run O/L, Frequency, Overcurrent, Stator RTD, Non-Stator RTD, G/F LOSET and HISET, Acceleration Time, Start Under Curve, Start Over Curve, I*I*T Start, Fail Shunt Trip, Phase Loss, Tach Accel, and 4 External Inputs 19) Learned Start Curve. When enabled, the starter will record a start curve with 100 data points of current and time between Start and At-Speed.
Type SSM Specification Guide (i) The incoming line section door cannot be opened if the disconnect switch is in the closed position. The disconnect switch cannot be closed if the incoming line section door is open. (ii) All other associated doors in sections containing medium voltage potential shall be interlocked with the incoming line section door by either direct mechanical means or by use of Kirk-key interlock mechanisms.
Type SSM Specification Guide C) SCR Modules 1) PIV Ratings: SCRs will be connected as inverse parallel pairs in series circuits to attain the following Peak Inverse Voltage ratings as a minimum for each phase: System Voltage: 1500 / 2300V Pairs: 1 ; PIV Rating.; 6500V System Voltage: 3300 / 4160V Series Pairs: 2 ; PIV Rating.;13000V 2) Protection: RC snubber network circuits on each phase assembly. To avoid possible component damage, MOV protective devices shall be used only on the gate firing circuitry.
Type SSM Specification Guide 2) Data Sampling (a) Critical operating data such as instantaneous current for Short Circuit, Ground Fault and Immediate Overload calculations shall be sampled every 2 milliseconds to prevent lagging operation. (b) Non-Critical data shall be obtained from a true RMS calculation circuit, and sampled in a 350 millisecond moving window of individual phase currents. 3) Real Time Clock with automatic leap-year updating shall be provided.
Type SSM Specification Guide D) Printed circuit boards shall be burned in for a minimum of 48 hours at 60°C. E) The complete unit shall be functionally tested under load before shipment to assure proper operation per specification. Complete test reports shall be available upon request. 7.
Type SSM Specification Guide Notes 14 1SXU132173M0201 [AC 1007.2] - 2/02 Low Voltage Products & Systems ABB Inc. • 888-385-1221 • www.abb.
Low Voltage Products & Systems ABB Inc. 1206 Hatton Rd. Wichita Falls, TX 76302 Tel. 888-385-1221 940-397-7000 Fax 940-397-7001 Web www.abb.com/lowvoltage 1SXU132173M0201 [AC 1007.
