Multipurpose Soft Starter Sizes 8 to 840 AMP Installation & Operating Manual 9/06 MN894
Table of Contents Section 1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Over Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 6 Specifications and Product Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Three Phase Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv Table of Contents MN894
Section 1 General Information Introduction Three phase multipurpose soft starter control provides reduced voltage, three phase motor starting. Ramp up and extended ramp down features provide an effective means to start and stop material handling equipment and pumping equipment to minimize spillage and water hammer problems. Adjustable current limit allows constant current starting of high inertia loads such as chippers, centrifuges and compressors.
Figure 1-1 Layout and Identification T1 T2 T3 GND CPT F1 F2 F3 L1 L2 L3 CB Shunt Trip CT3 CT4 CT2 OL CT1 MOV R1 R2 TB1 LCM PC1 PC2 PC3 Overtemperature Switch Snubber Capacitor Snubber Resistor Fan Legend: CB CPT CT1, 2, 3, 4 F1, F2, F3 GND LCM MOV OL PC1, 2, 3 R1, R2 TB1, 2 - Fan Fan Motor Circuit Protector or fusible disconnect Control transformer (control voltage) Current Transformer Control transformer fuses Ground connection Logic control module Metal oxide varistors Overload relay
Figure 1-2 Logic Control Module Block Diagram O N Ramp Mode Select 123456 RDD CM OC TACH CL BP 1 2 3 4 5 6 Reset Logic Gates & Sync.
Major Components (Refer to Figures 1-1 and 1-2). Logic Control Module (LCM) The LCM (Logic Control Module) operates in the voltage ramp mode or current limit mode during ramp up and ramp down (if ramp down is selected). The LCM controls the amount of current that the power cells deliver to the motor during ramp up and ramp down. It uses gates and synchronous timing circuits to control the firing times of the SCR’s in the power cells. The current transformer provides the LCM with motor current information.
Snubber Network 160 through 840 amp models only. A resistor and capacitor series circuit (snubber) is wired in parallel with each disk type SCR. The RC network enhances the electrical characteristics of the SCR and provides high voltage transient protection. Shorted SCR Detection: If a shorted SCR condition is detected while starting, running or stopping, the SHUNT TRIP contact will close and the SHUNT TRIP light will indicate the condition.
Configurations Control Only: Soft start control, without motor overload protection or branch circuit protection circuit breaker or fusible disconnect switch. Suitable for installation with a series contactor or as a retrofit for an existing motor starter. Non-combination Starter: Soft start control with motor overload protection, less branch circuit protection circuit breaker or fusible disconnect switch. Installation with existing branch circuit protection would use this configuration.
Limited Warranty For a period of two (2) years from the date of original purchase, BALDOR will repair or replace without charge controls and accessories which our examination proves to be defective in material or workmanship. This warranty is valid if the unit has not been tampered with by unauthorized persons, misused, abused, or improperly installed and has been used in accordance with the instructions and/or ratings supplied.
Safety Notice This equipment contains voltages that may be as high as 600 volts! Electrical shock can cause serious or fatal injury. Only qualified personnel should attempt the start-up procedure or troubleshoot this equipment. This equipment may be connected to other machines that have rotating parts or parts that are driven by this equipment. Improper use can cause serious or fatal injury. Only qualified personnel should attempt the start-up procedure or troubleshoot this equipment.
Section 2 Installation Receiving, Inspection and Storage When you receive your control, there are several things you should do immediately. 1. Observe the condition of the shipping container and report any damage immediately to the commercial carrier that delivered your control. 2. Remove the control from the carton. Inspect for shipping damage and report any damage immediately to your commercial carrier. 3.
Table 2-1 Three Phase Rating (AMPS) 8 16 30 55 80 160 250 420 600 840 Fuse Amps Class 100 100 200 100 175 175 400 400 800 800 1200 J J J RK1 J J RK5 RK5 L L L MCP (GE) Short Circuit ARMS 5,000 5,000 5,000 5,000 42,000 42,000 100,000 100,000 100,000 100,000 100,000 Amps Type 20 20 50 50 100 100 300 300 600 600 600 SELA SFLA SGLA SKLA Short Circuit ARMS 5,000 5,000 5,000 , 10,000 10,000 42,000 42,000 42,000 42,000 42,000 Note: Maximum recommended fuses/breakers are based on 25°C ambient, maximum co
Installation 1. 2. 3. 4. 5. 6. 7. 8. 9. Mount the panel or enclosure to the mounting surface. The panel or enclosure must be securely fastened to the mounting surface. Refer to the mounting dimensions in Section 6 of this manual. Ground the panel and control per NEC article 250 as well as state and local codes. Use copper wire rated for at least 75°C. Refer to Figure 2-4 and Table 2-2 for wire size recommendations.
Non-Motor and Special Motor Applications Non-motor load: The multipurpose control is designed to provide reduced starting voltage for standard three phase induction motors. The control may also start non-motor loads for controlled inrush current applications with resistive or inductive loads. Consult Baldor if the control is to be used with a non-motor load. Wye-Delta or Part Winding Starter: The multipurpose control can replace an existing wye-delta or part winding starter.
Section 3 Operation Types of Starting Voltage Starting (S2-4 = OFF) During start the initial voltage (TU) is set to a level where the motor will begin to turn when power is applied. The ramp time (RU) is adjustable to provide a smooth start. The pulse time (PT) is used for high friction loads to break loose “frozen” loads with up to 400% FLA.
Start Adjustments (Refer to Figure 3-1). Ramp Up Ramp up time (RU) is adjustable from 3 to 50 seconds. RU adjusts the voltage ramp or the tachometer starting ramp time. For voltage starting, RU adjusts the time it takes the motor to reach full voltage. Actual acceleration time to full speed depends upon the motor load and the setting of the additional start adjustments.
Run Adjustments (Refer to Figure 3-3). Current Monitor Current monitor set point (CM) is adjustable from 50 to 400% FLA to monitor the running current after the motor reaches the full run condition. With CM enabled (S2-2=ON), if the running current exceeds the CM set point, the control will shut down, the CUR MON contact will close, and the light will illuminate.
S2-4 Tachometer and Voltage Ramp Select (TACH) “On” position: The control is in the tachometer ramp mode during start and stop. Starting and stopping times are independent of the load conditions. Ramp up (RU) is dependent on the ramp up and current limit (CL) settings. RD is dependent on the RD and CL settings. Note: Current limit is disabled if S2-5 is “Off”. Operation in the tachometer mode requires an isolated input tach signal of 0 to 10 volts DC with a 10 msec response time or better.
Control Connections (Refer to Figure 3-5). CLOSE TO RUN Close to Run terminals 12 and 13. Close to run contact must be closed to initiate ramp up and run. Close to Run contact must be opened to initiate ramp down to stop. Close to run contact must be dry and electrically isolated contact. If a voltage is applied to these terminals, the control may be damaged. When the Close to Run circuit is closed, the Start/Run light will be on and the contact will close.
Indicators Power On The PWR light indicates that power is supplied to the internal power supply of the control. WARNING: If the power light is not illuminated, it does not necessarily mean that the line voltage is off. Electrical shock hazard may exist. Measure the voltage at the line terminals before service. Over Current OC over current shutdown LED. If the control shuts down due to an over current condition (motor current is greater than 450% FLA), the OC light will be on.
Section 4 Start-up Safety Notice Be sure to read and understand all notices, warning and caution statements in Section 1 of this manual. If you have any questions about the safe operation of this equipment, please contact your Baldor representative before you proceed. Start-up Checklist Recommended Equipment Overview Caution: Volt meter (20kW per volt or better, true RMS meter). Clamp on ammeter (5 times FLA full scale). Adjustment wand (provided with multipurpose soft start control).
Quick Set-Up 1. Check continuity of the motor wiring and check for phase to phase and phase to ground short circuits. 2. Connect the control wiring for your application. (Refer to section 2 for wire size and torque specifications). 3. For MB#−XXX models, verify the control transformer is set for the line voltage. For MA#−XXX models, verify proper voltage jumper selection on LCM models. 4. Calibrate S1. Refer to Appendix A for switch settings.
Tach Feedback Starting 11. Set for ramp up with ramp down as follows: S2-1 = OFF Ramp down disable S2-2 = OFF Current monitor S2-3 = OFF Over current shut down S2-4 = ON Tachometer enable S2-5 = OFF Current limit enable S2-6 = OFF Bypass contactor Set RU, TU, PT and PF fully CCW. Set RD and RT at mid point. 12.
Starting Instructions Choose one of the following examples that best matches your application. Read the procedure and set the control according to the procedure or use the steps to develop your own procedure. Variable Load with Voltage Ramp (S2-2=OFF, S2−4=OFF) Typically used for non-inertial loads, loads that increase with speed and changing loads, such as axial fans and pumps. 1. Set RU, TU, PT, RD, TD and PF fully counterclockwise CCW). 2. Set CL and CM fully clockwise (CW). 3.
High Friction Load with Voltage Ramp (S2-2=OFF, S2-4=OFF) Typically used for loads that require high breakaway torque and low acceleration torque; i.e., conveyors in icy environment, equipment that resists starting due to lack of use, traction loads, etc. 1. Set RU, TU, PT, RD, TD and PF fully counterclockwise (CCW). 2. Adjust PT clockwise sufficiently to start load slowly moving at moment of switching. 3. Adjust TU clockwise sufficiently to keep load moving after starting pulse. 4.
Inertial Load (S2-1=ON, S2-4=OFF, S2-5=ON) Typically used on coasting and/or flywheel loads; i.e., chippers, centrifuges, compressors, crushers, chillers, band saws, centrifugal fans and blowers. Note: Ramp down and pulse start are not normally used with inertial loads. 1. Set TU, PT, RD, TD and PF fully counterclockwise (CCW). 2. Set RU approximately 90% clockwise. 3. Set CL to midpoint. 4. Set CM fully clockwise (CW). 5.
Tachometer Mode (S2-4=ON, S2-5=OFF) Typically used for changing loads that require consistent starting and stopping times, independent of load condition, and pumping applications with severe head pressure to reduce water hammer; i.e., pumps, conveyors, stackers and other material handling equipment. 1. Set RU, TU, PT, RD, TD and PF fully counterclockwise (CCW). 2. Set CL and CM fully clockwise (CW). 3. Adjust RU and RD for desired ramp up and ramp down time. RD is only effective with S2-1=OFF.
Start-up Troubleshooting The Multipurpose Control module has 7 LEDs to help diagnose problems. There is a summary of the functions and indications on pages 2-8 and 2-9. The Multipurpose starter was tested under load with all SCR and electronic functions checked before shipping. Note: To test the output of a soft starter a motor must be connected, even if it is a 1/2 HP motor on a 700 HP starter. Be careful not to start large motors repeatedly without a cooling-down period. No Power To The Motor 1.
Circuit Breaker is Tripping − During Starting If the shunt trip light comes “ON” during starting it may detect a weak input phase. This is typical of grounded delta and open delta power systems. For proper operation, a four wire WYE system is recommended. If the shunt trip light is ON and it is determined that input power is correct and there is a motor load; Then, disable the shunt trip circuit and do an SCR resistance test. 1.
4-10 Start-up MN894
Section 5 Troubleshooting Safety Notice Be sure to read and understand all notices, warning and caution statements in Section 1 of this manual. If you have any questions about the safe operation of this equipment, please contact your Baldor representative before you proceed. Preliminary Checks In the event of trouble, disconnect all input power to the control and perform these preliminary checks. Power Off Checks 1. 2. 3. 4. 5. 6. 7.
SCR Tests Inspection Full Voltage Test 5-2 Troubleshooting If the SCR devices are suspected of failure, these tests can be used to test the SCR’s. Be sure the physical condition of components is correct. Refer to Figure 5-1. 1. Be sure power is off. 2. Inspect power cell connections for tightness and signs of overheating. 3. Replace snubber capacitors if there is any sign of oil or fluid leaking. Snubbers are not used on size 55 and 80 amp power cells. 4. Inspect SCR clamp insulator for cracks.
Resistance Test Disconnect the power cell or SCR pack from all external wiring before you perform a resistance check. Use an ohmmeter with 20,000 ohms per volt or greater impedance for the resistance measurements. Refer to Table 5-1 and Figure 5-1. 1. Be sure power is OFF. 2. Remove all wiring from the power cell or SCR pack. 3. Sizes 55 and 80 amps have three SCR packs, one for each phase mounted on a single ground potential heatsink. Check all three SCR packs.
SCR Replacement Figure 5-2 shows the polarity and wire colors for correct SCR installation. It also shows the locations of the tightening bars. SCR Polarity Figure 5-2 SCR Polarity M160 / M250 M420 / M600 / M840 Cathode Terminals GT, T, GL and L.
With the SCR device installed with the tightening bar and bolts (Figure 5-2), tighten the bolts as follows: (see Figure 5-3) 1. Tighten the nuts evenly until finger tight. 2. Tighten bolts in 1/4 turn increments. 3. Use the SCR tightening pressure gauge and measure the deflection of the Tightening bar. The middle and both ends of the gauge must be in solid contact with the bar for an accurate reading. Correct pressure is indicated when the gauge notch for the tightening kit number align.
Table 5-3 Troubleshooting Chart Symptom MCP trips as it is cclosed osed (a (also so see Shunt Trip p light g comes ON) MCP trips t i as the th motor is started (also see Shunt Trip light comes ON) MCP trips p after th motor the t is i running (also see Shunt Trip light comes ON) Starter does nothing when start button is pressed. Control does not accelerate motor to full speed (Stalls) Insufficient torque available from current limit CL. Motor accelerates too slowly. Motor accelerates too quickly.
Table 5-3 Troubleshooting Chart Continued Symptom Overload relay trips when starting Overload relay trips when running Motor decelerates too quickly (RDD=OFF) Motor decelerates too slowly (RDD=OFF) Erratic operation Shunt trip light comes ON Cause Incorrect heater size or setting. Loose or burned heater. Long starting time. (high inertia loads may require slow trip overloads. Mechanical failure within the load. Single phasing or unbalanced start circuit. Excessive starting time (CL too low).
The control panel is intended to provide years of trouble free service with appropriate cooling and protection from the elements. Should trouble occur, refer to the appropriate control manual for control and motor troubleshooting information. Reset the Circuit Breaker If the circuit breaker is tripped, it must be reset to restore power. The breaker is tripped if the handle is in the “Tripped” position as indicated in Figure 5-5. Before the breaker is reset, locate the source of electrical trouble. 1.
Reset an Overload Relay If the Overload relay is tripped, the tripped indicator (Reset Button of Figure 5-6) will be in the “Tripped” position. 1. Verify that the overload condition has been cleared to allow restart. 2. Verify motor lead connections are tight. 3. Allow time for the overload to cool. 4. Press the “Reset Button” (Figure 5-6).
5-10 Troubleshooting MN894
Section 6 Specifications and Product Data Identification Three Phase Starters M B 7 − 030 − C B − * Control Type M- Multipurpose Control Group A - Self powered logic control module B - Logic control modules that require 115 or 230VAC.
Multipurpose Control Specifications Three Phase Starters Input Voltage VAC 3PH 60Hz HP IC HP IC HP IC 230 460 575 2 8 5 8 5 10 10 16 10 20 25 30 MA7-008 MA8-008 Input Voltage VAC 3PH 60Hz HP 208 230 460 575 15 20 40 50 MB7-055 MB8-055 MA7-016 MA8-016 MB7-080 MB8-080 IC HP 55 25 30 60 75 MA7-030 MA8-030 MB7-160 MB8-160 IC HP 80 50 60 125 150 MB7-250 MB8-250 IC HP 160 75 100 200 250 MB7-420 MB8-420 IC HP 250 150 150 350 400 MB7-600 MB8-600 IC HP IC 420 200 250 50
Control Specifications Control Method 6 SCR’s connected in inverse parallel for full-wave 3 phase control Peak Inverse Voltage 208/230 460 575 1200VAC minimum 1200VAC minimum 1600VAC Start Time Adjustable range 3-50 seconds (current limit starting is not timed). Stop Time Adjustable range 5-50 seconds (can only extend stop time). Initial Torque Adjustable range: Starting 40-75%, Stopping 0-100%. Current Limit (Selectable) Adjustable range 75-400% of FLA (full load amperes).
Wire Size & Tightening Torque Specifications Combination Starter and Non-Combination Starter and Control Only 8, 16 Amp Control Only (A) Line Input TB1 (C) Control Connections Line Input (B) (D) GND (C) (D) GND OR GND Control (D) GND Motor Output Load (A) (B) (D) Motor Output Load Wire Size Torque Specifications Size 8,16 Terminal (Identifier) A B C D Amps 8, 16 30 55 80 160 250 420 600 840 All 8, 16, 30 55 80 160 250 420 600 840 6-4 Specifications and Product Data Wire Size AWG 10 -
Mounting Dimensions Open Panel B d Dia h A w Open/Panel Dimensions Amp p R ti Rating 8 16 30 55 80 160 250 420 600 840 MN894 A 12.25 12.25 12.25 21.00 21.00 39.00 39.00 45.00 57.00 57.00 B 10.25 10.25 10.25 21.00 21.00 27.00 27.00 33.00 33.00 33.00 Control Only h w 11.63 9.63 11.63 9.63 11.63 9.63 19.24 19.24 19.24 19.24 31.24 25.24 31.24 25.24 43.24 31.24 55.24 31.24 55.24 31.24 d 10.16 10.16 10.16 12.62 12.62 9.35 11.35 13.35 13.35 13.35 Dia 0.25 0.25 0.25 0.50 0.50 0.50 0.50 0.50 0.50 0.
Mounting Dimensions Continued NEMA 1, 3R and 12 B d Dia h A w NEMA 1 Dimensions Amp p R ti Rating 8 16 30 55 80 160 250 420 600 840 A 14.00 14.00 14.00 24.00 24.00 42.00 42.00 48.00 60.00 60.00 B 12.00 12.00 12.00 24.00 24.00 30.00 30.00 36.00 36.00 36.00 Control Only h w 11.00 11.00 11.00 11.00 11.00 11.00 25.24 18.00 25.24 18.00 37.24 24.00 37.24 24.00 49.24 30.00 61.24 30.00 61.24 30.00 B 16.00 16.00 16.00 24.00 24.00 36.00 36.00 36.00 48.00 48.00 Control Only h w d 21.24 10.00 11.35 21.24 10.
Connection Diagrams MA Style 8, 16 and 30 AMP Combination and Non-Combination Starter and Control only (Three Wire) Start (Hand - Off - Auto) Two Wire Control Device H Stop O Caution: Read Note (Two Wire) A R TB1 11 12 13 TB1 11 14 12 13 14 11 TB1 12 13 Line Input L2 L1 L3 14 CB X A F3 B A F1 B A F2 B MOV 115VAC CB Shunt Trip 97 98 OL 96 OL 14 13 12 11 10 9 8 7 6 5 4 3 2 1 15 Close To Run Start / Run 16 60Hz Shunt Trip 50Hz 18 Ramp End Tach Input
Section 1 General Information Connection Diagrams Continued MB Style 8, 16 and 30 AMP Combination and Non-Combination Starter and Control only (Three Wire) Start (Hand - Off - Auto) Two Wire Control Device H Stop O Caution: Read Note (Two Wire) A R TB1 11 12 13 TB1 11 14 12 13 14 11 TB1 12 13 Line Input L2 L1 L3 14 CB X A F3 B A F1 B A F2 B MOV 115VAC 95 CB Shunt Trip 97 98 OL 96 OL 13 12 11 10 9 8 7 6 5 4 3 2 1 14 15 14 15 16 Shunt Trip 230VAC
Section 1 General Information Connection Diagrams Continued MA Style 55 and 80 AMP NEMA 1 and Panels Combination and Non-Combination Starter and Control only (Three Wire) (Hand - Off - Auto) Start Two Wire Control Device H Caution: Read Note O Stop Line Input L2 A L1 1 2 TB1 3 4 5 6 7 8 96 10 9 95 1 2 TB1 R1 OL 13 3 5 4 6 7 8 14 F3 B X 115VAC CF R1 R1 12 R2 9 CB 8 13 14 5 97 98 OL R2 Shunt Trip 13 12 11 10 9 8 7 6 5 4 3 2 1 14 15 Close To Run
Section 1 General Information Connection Diagrams Continued MB Style 55 and 80 AMP NEMA 1 and Panels Combination and Non-Combination Starter and Control only (Three Wire) (Hand - Off - Auto) Start Two Wire Control Device H Caution: Read Note O Stop Line Input L2 A L1 1 2 TB1 3 4 5 6 7 8 96 10 9 95 1 2 TB1 R1 OL 13 3 4 5 6 7 8 14 F3 B X 115VAC 5 CF R1 R1 12 R2 9 CB 8 13 14 5 97 98 OL R2 Shunt Trip 13 12 11 10 9 8 7 6 5 4 3 2 1 14 Close To Run S
Section 1 General Information Connection Diagrams Continued NEMA 1 & Panel Mounted Size 160−840 AMP Control Only (Hand - Off - Auto) Enclosure Fan (Three Wire) Two Wire Control Device H O Start Stop 2 3 4 1 2 TB1 5 6 8 7 4 5 6 7 8 13 14 F3 B X 115VAC CF CF CF R1 12 8 13 12 11 10 9 8 7 6 5 4 3 2 1 Power cell cooling fan. Snubber capacitor. LCM current transformer. Primary current transformer. Control transformer fuses. Control branch circuit fuse.
Section 1 General Information Connection Diagrams Continued NEMA 1 & Panel Mounted Size 160−840 AMP Combination & Noncombination (Hand - Off - Auto) Two Wire Control Device H O Enclosure Fan (Three Wire) A Caution: Read Note Start Stop Enclosure Fan 1 2 1 2 TB1 3 4 5 6 8 7 5 4 6 8 7 9 95 96 10 TB1 CB R1 OL 13 14 A F3 B X 115VAC 9 5 CF CF CF R2 9 97 OL Line Input L2 L1 3 R1 10 9 CB F1 B A F2 B MOV 14 R1 12 13 14 Shunt Trip R2 A 5 98 8
Section 1 General Information Connection Diagrams Continued NEMA 12 Size 160−840 AMP Combination & Noncombination Bypass Stop Enclosure Fan 1 2 3 5 4 A Caution: Read Note 1 2 TB1 6 8 7 9 95 96 O Enclosure Fan Start 10 3 4 5 9 5 R2 97 98 OL OL 13 TB1 A1 12 R2 13 14 A2 R3 8 13 12 11 10 9 8 7 6 5 4 3 2 1 L3 CB MOV 14 F3 B X A A F1 B F2 B 14 R1 13 14 BP 5 Line Input L2 R1 CF CF Shunt Trip R3 9 10 9 CB 5 8 7 115VAC CF 9 6 L1 A
Section 1 General Information 6-14 Specifications and Product Data MN894
Appendix A Reference Information Glossary BP CC CCW CL CM CS & RS Bypass Contactor Current Calibrator Counterclockwise Current Limit Current Monitor Resistor & Capacitor series circuit Current Monitor Current Transformer Clockwise Full Load Amperes (Motor) Logic Control Module Light Emitting Diode Motor Circuit Protector Metal Oxide Varistor Motor Power Over Current Shutdown Overload Relay Power Cells CUR MON CT CW FLA LCM LED MCP MOV MTR PWR OC OL PC PF PIV PT PWR Ramp End RD RDD RMS RU SCR Shunt Trip S
Size 055 Motor M t FLA 24−26 27−30 31−34 35−38 39−42 43−45 46−48 49−51 52−55 Size 080 M t FLA Motor 44−46 47−52 53−58 59−64 65−69 70−75 76−80 Size 140 Motor M t FLA 58−63 64−70 71−78 79−86 87−95 96−105 106−120 121−128 129−140 Size 160 Motor M t FLA 65−70 71−78 79−87 88−97 98−108 109−120 121−135 136−148 149−160 2 1 0 0 1 0 1 1 0 0 S1 Switch 3 0 1 0 0 1 1 1 0 0 Position and 4 5 0 0 0 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 Setting 6 1 1 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 2 1 0 0 1 0 0 1 S1 Switch 3 1 0 0 0 1 1 1
Quick Reference Chart RU +− TU −+ 50 3 40 75 S T A CL −+ 75 400 R T PT −+ RD +− 0 5 TD −+ 0 CM − + Torque Up (40-75% voltage) Tachometer: Disabled. Voltage: Initial starting voltage for ramp. Current Limit (75-400% FLA) Tachometer or voltage: Enabled by S2-5=ON. Maximum current during ramp up and ramp down. Pulse Time (0-1.5 sec.) Tachometer: Disabled. Voltage: Duration of 400% FLA starting pulse. 1.5 S 50 Ramp Up Time (3-50 sec.) Tachometer: Time to reach full speed.
Overload Relay Adjustment A class 30 electonic relay is provided with combination and non-combination starters. Read the FLA from the motor nameplate and set the overload dial to the correct ampere setting. Refer to the table that represents the starter size. Caution: Select the table that matches you starter size only. Do not use the switch settings for a starter size that is different than the one you are setting up. Using the wrong switch setting can damage the Multipurpose Soft Starter control.
Appendix B Circuit Breaker Adjustments Circuit Breaker Adjustment (Inrush current estimation) Mechanical adjustment of the trip setting may be necessary if the circuit breaker is replaced. The first step of this adjustment procedure is to determine the motor inrush current (in amperes). Inrush current is also called “Locked Rotor AMPS” or “LRA”. In soft start applications, the initial voltage applied to the motor is reduced to approximately 40% to 70% of nominal line voltage.
Section 1 General Information Example: 3 phase Motor rated at 50 HP at 460VAC, 65 amps (continuous), code letter J. I Inrush + 50 x 577Ǔ ǒ7.5 x 460 + 470Amperes Circuit Breaker Adjustment The calculated Inrush Amps value is used to initially set the breaker. If the circuit breaker trips during use, the trip level is increased. Refer to Figure B-1. Caution: The trip level of the circuit breaker must remain as low as possible to avoid damage to equipment.
Baldor District Offices
BALDOR ELECTRIC COMPANY P.O. Box 2400 Ft.
