his equipment must be conducted in accordance with all
national, regional and local electrical codes.
All drawings and technical representations included in this manual are for
typical installations and should not in any way be considered for specific
applications or modifications. Consult SAF Drives and Automation for
supplemental instructions.
SAF Drives and Automation Ltd. accepts no liability for any consequences
resulting from inappropriate, negligent or incorrect installation, application or
adjustment of this equipment.
The contents of this manual are believed to be correct at the time of printing.
In following with our commitment to the ongoing development and improvement
of our products SAF reserves the right to change the specification of this
product and/or the content of this instruction manual without notice. SAF MSS6 REDUCED VOLTAGE STARTER
Page 4 SAF MSS6 REDUCED VOLTAGE STARTER
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TABLE OF CONTENTS
1 MSS6 GENERAL DESCRIPTION ................................................................................................7
1.1 OVERVIEW...................................................................................................................................................................................... 7
1.1.1 STANDARD FEATURES ....................................................................................................................................................... 7
1.1.2 OPTIONAL FEATURES ......................................................................................................................................................... 8
1.2 APPLICATION NOTES ................................................................................................................................................................. 8
1.2.1 OPERATION MODES ............................................................................................................................................................ 8
1.2.2 CHOOSING STARTING MODE.......................................................................................................................................... 8
1.2.3 MOTOR AND LOAD TYPES ................................................................................................................................................ 9
1.2.4 STARTING AC MOTORS IN PARALLEL ........................................................................................................................ 9
2 SPECIFICATIONS.........................................................................................................................10
2.1 POWER RATING..........................................................................................................................................................................10
2.2 MAXIMUM RATINGS..................................................................................................................................................................10
2.3 SERVICE CONDITIONS .............................................................................................................................................................10
2.4 FUSE SIZING.................................................................................................................................................................................11
2.5 DIMENSIONS ................................................................................................................................................................................11
2.5.1 STANDARD UNIT.................................................................................................................................................................11
2.5.2 REVERSING UNIT (OR STANDARD UNIT WITH DC INJECTION).........................................................................11
3 TERMINALS .................................................................................................................................12
4 KEY PAD OPERATION................................................................................................................13
5 INSTALLATION AND START-UP..............................................................................................14
5.1 INSPECTION.................................................................................................................................................................................14
5.2 SAFETY PRECAUTIONS ............................................................................................................................................................14
5.3 MOUNTING GUIDELINES ..........................................................................................................................................................14
5.4 WIRING GUIDELINES .................................................................................................................................................................15
5.5 START-UP......................................................................................................................................................................................16
5.5.1 BEFORE POWER-UP ...........................................................................................................................................................16
5.5.2 WITH POWER ON ...............................................................................................................................................................16
6 FAULTS ..........................................................................................................................................17
FAULT...............................................................................................................................................................................................17 SAF MSS6 REDUCED VOLTAGE STARTER
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7 FEATURES.....................................................................................................................................18
7.1 SOFT STOP...................................................................................................................................................................................18
7.2 SCR BY-PASS...............................................................................................................................................................................18
7.3 SHEAR PIN PROTECTION........................................................................................................................................................18
7.4 SLOW SPEED FWD/REV (JOG)...............................................................................................................................................18
7.5 SHORTED SCR DETECTION....................................................................................................................................................19
7.6 SOLID STATE FULL SPEED REVERSING.............................................................................................................................19
7.7 DC INJECTION BRAKING.........................................................................................................................................................20
8 PARAMETERS..............................................................................................................................21
9 SPARES ..........................................................................................................................................26
9.1 SPARE PARTS..............................................................................................................................................................................26
9.2 SCR INSTALLATION PROCEDURE.......................................................................................................................................26 SAF MSS6 REDUCED VOLTAGE STARTER
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1 MSS6 GENERAL DESCRIPTION
1.1 OVERVIEW
The Micro Opal series is a processor controlled line of solid state reduced voltage starters for use with
3 phase induction motors. This series also includes various communication options, which can be
easily added to connect to standard industrial networks.
A solid state starter provides a step-less, smooth current ramp to the motor. This characteristic
eliminates current surges and mechanical torque transients. Since these units are solid state, we now
eliminate the maintenance of moving contacts, which are involved in almost any other method of
starting an AC induction motor.
1.1.1 STANDARD FEATURES
200 600 VAC 3 phase universal voltage, 50/60Hz with no adjustment
Single control card through out Micro Opal range
Current regulated closed loop
Dual operation modes to match any application:
Constant Current mode for light loads or limited power supplies
Current Ramp mode for high inertia or heavy loads
Soft stop
Jog Speed:
14% of full speed forward
20% of full speed reverse
Two or three wire control
120 VAC control inputs for:
Start
Stop
Jog
Reverse
Reset
Enable
Keypad and LCD display for starter setup and diagnostics
Single phase protection
Phase rotation insensitive
Instantaneous over-current trip
Class 10, 15, 20, or 30 electronic motor overload
Shorted SCR Fault output
Shear pin Fault
Dry contact relay outputs for:
Fault
By-pass
Shorted SCR
Running
Reverse SAF MSS6 REDUCED VOLTAGE STARTER
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1.1.2 OPTIONAL FEATURES
By-Pass Contactor
Once the motor has reached operational speed, the by-pass contactor is c