Specifications
Type SSM Specication Guide
6 Low Voltage Products & Systems
1SXU132173M0201 [AC 1007.2] - 2/02 ABB Inc. • 888-385-1221 • www.abb.com/lowvoltage
(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. The coast down lockout time shall be programmable
between 0 and 60 minutes following a Stop command.
9) Starts-per-Hour Lockout shall be provided to prevent damage to the motor from rapid cycling of start
commands for any reason. The maximum starts-per-hour shall be programmable between 1 and 10 starts.
(a) Time Between Starts Lockout shall also be programmable to work with the above. A minimum time of
between 0 and 60 minutes between start attempts shall prevent restarting too rapidly for the motor and
load conditions as determined by the user.
B) Acceleration Control shall be fully adjustable in programming to match any application. As a minimum, starter
shall come complete with the following settings:
1) Ramp Type: To ensure maximum exibility in matching the load conditions in the eld, the starter shall provide
all of the following methods of closed loop acceleration ramp control: Voltage Ramp, Voltage Ramp with
Current Limit, Current Limit Only (Current Step), Current Ramp (Torque Ramp) or up to 3 Custom Ramp
proles that can be programmed by the user.
2) Starting Torque: Initial torque output shall be programmable as either Current or Voltage output, and adjustable
between 0-100% of maximum Locked Rotor Torque (600% current) available from the motor.
3) Maximum Current Limit: To ensure reliability of starting under any circumstance that the motor can function
in, Current Limit shall be adjustable between 200 and 600% of the unit rating. This will allow locked rotor
current to be delivered to the motor if necessary. Lighter duty starters with lower current limit settings will not
be acceptable.
4) Ramp Time: The time between Initial Torque and Full Output shall be adjustable between 1 and 120
seconds.
5) Dual Ramps: To accommodate changing load conditions, the starter shall provide 2 separately adjustable
ramp proles, selectable via a dry contact closure. Each ramp will provide all of the above features.
6) Custom Ramp Curves shall be available that can be congured by the user to match any load or starting
condition. Each of the 3 available custom curves can be proled by entering 8 torque and time points. The
starter shall create a smooth acceleration curve from these plotted axis points.
7) Kick Start: To provide for starting difcult loads, the starter shall include a Kick Start feature that will apply a
high output for a short time on initial start command. The Kick-Start voltage level shall be adjustable from 10
– 100% voltage, for 0.1-2 seconds max.
8) Jog: For checking rotation at start-up or other testing procedures, the starter shall provide a programmable
Jog feature, adjustable from 5 – 75% of line voltage.
C) Deceleration Control (Ramp Down) shall be completely independent of any Accel Ramp settings and provide
a fully adjustable Decel prole in order to avoid possible motor damage. Pre-programmed decel “algorithm”
systems that do not allow contouring to match load conditions are not acceptable.
1) Step Down Voltage: adjustable from 100 to 0% of line voltage, allowing the motor torque to drop off
immediately to a level that affects output without waiting for a linear ramp.
2) Deceleration Ramp Time: adjustable from 0 – 60 seconds to allow gentle controlled deceleration in
excess of the natural coast-to-stop time of the load.