Baldor MN894 - Manuals - manualsarea.com

Page 3 - Table of Contents

Table of Contents Table of Contents i MN894 Section 1 General Information 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . ....

Page 6 - iv Table of Contents

Page 7 - Introduction

Section 1 General Information General Information 1-1 MN894 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 eq...

Page 8 - Figure 1-1 Layout and Identification

1-2 General Information MN894 Figure 1-1 Layout and Identification CB L1 L2 L3 T1 T2 T3 CT4 CT3 CT2 CT1 CPT MOV PC1 PC2 PC3 Fan Fan LCM F1F2F3 TB1 OL GND Overtemperature Switch R1 R2 Fan Snubber Capacitor Snubber Resistor Shunt Trip Legend : CB - Motor Circuit Protector or fusible disconnect CPT - C...

Page 9 - Figure 1-2 Logic Control Module Block Diagram

General Information 1-3 MN894 Figure 1-2 Logic Control Module Block Diagram 1 2 3 4 5 6 123 456 O N OFF ON S2 RDD CM OC TACH CL BP Ramp Mode Select Logic & Firing Control CM PF MIN MAX R U N RD TD S T O P CLPT RU TU S T A R T User Adjustment Control PowerOvercurrent Trip Current Monitor Motor Po...

Page 10 - Major Components; Current Transformer; Protection Devices

1-4 General Information MN894 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 po...

Page 11 - Figure 1-3 Starter Diagram

General Information 1-5 MN894 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...

Page 12 - Configurations; Enclosures and Ventilation:

1-6 General Information MN894 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-combinatio...

Page 13 - General Information 1-7; Limited Warranty

General Information 1-7 MN894 Limited Warranty For a period of two (2) years from the date of original purchase, BALDOR willrepair or replace without charge controls and accessories which ourexamination proves to be defective in material or workmanship. Thiswarranty is valid if the unit has not been...

Page 14 - -8 General Information; Safety Notice

1-8 General Information MN894 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 ma...

Page 15 - Receiving, Inspection and Storage; AC Main Circuit

Section 2 Installation Installation 2-1 MN894 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...

Page 16 - Table 2-1 Three Phase

2-2 Installation MN894 Table 2-1 Three Phase Rating Fuse MCP (GE) Rating (AMPS) Amps Class Short Circuit A RMS Amps Type Short Circuit A RMS 8 100 J 5,000 20 5,000 16 100 J 5,000 20 5,000 30 200 J 5,000 50 5,000 100 RK1 5,000 50 SELA , 55 175 J 42,000 100 SELA SFLA 10,000 80 175 J 42,000 100 SFLA SG...

Page 17 - Installation; Use copper wire rated for at least 75; Table 2-2 Recommended Wire Size and Tightening Torque; All wire sizes based on 75

Installation 2-3 MN894 Installation 1. 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. 2. Ground the panel and control per NEC article 250 as well as state an...

Page 18 - Non-Motor and Special Motor Applications; Part Winding Starter:; controlling a standard design B motor.; Reversing Applications:; contactor can be used. Consult Baldor for more information.; Consult Baldor if the control is to be used with a multispeed motor.; The control can; Motors on Grounded and; may not be able to detect a shorted SCR condition.

2-4 Installation MN894 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 ...

Page 19 - Types of Starting; Voltage Starting

Section 3 Operation Operation 3-1 MN894 Types of Starting Voltage Ramp % Line Voltage 25 50 75 100 RU TD CL RD TU Time 0 PT Current Limit % FLA 100 200 300 400 CL RD Time 0 PT Tach % Full Speed 25 50 75 100 RU RUN RD Time 0 Voltage Starting (S2-4 = OFF) During start the initial voltage (TU) is set t...

Page 20 - Start Adjustments; up with constant acceleration is achieved.; Stop Adjustments; braking. Ramp down will only extend the stopping time.

3-2 Operation MN894 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...

Page 21 - Run Adjustments; Current Monitor; Power; factor; Note: PF adjustment has no effect in bypass mode.; Current Calibration Switch; the current monitor. The control will shut down.

Operation 3-3 MN894 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 co...

Page 23 - Control Connections; applies to an over current or a current monitor shutdown.

Operation 3-5 MN894 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...

Page 24 - Indicators; Power On; while the control is in operation.; Summary of Start and Stop Sequences; - 3 close when power is applied to motor. Ramp up cycle begins.

3-6 Operation MN894 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...

Page 25 - Section 4; Recommended Equipment

Section 4 Start-up Start-up 4-1 MN894 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 Che...

Page 28 - Starting Instructions; Variable Load with Voltage Ramp

4-4 Start-up MN894 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 fo...

Page 33 - Check the “T” leads for a phase to phase and phase to ground short; OC light Comes ON Shutting “OFF” The Starter; “OFF” or current monitor level is set properly for a given load.

Start-up 4-9 MN894 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...

Page 35 - Power Off Checks

Section 5 Troubleshooting Troubleshooting 5-1 MN894 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...

Page 36 - SCR Tests; Inspection

5-2 Troubleshooting MN894 SCR Tests If the SCR devices are suspected of failure, these tests can be used to test the SCR’s. Inspection 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 o...

Page 37 - Figure 5-1 Power Cell Configurations

Troubleshooting 5-3 MN894 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. ...

Page 38 - SCR Replacement; SCR Polarity; the locations of the tightening bars.; Figure 5-2 SCR Polarity; SCR Pressure Gauge; Figure 5-3 shows how the pressure gauge is used.; Figure 5-3 SCR Tightening Pressure Gauge; True Flat Surface; Continued on next page.

5-4 Troubleshooting MN894 SCR Replacement SCR Polarity Figure 5-2 shows the polarity and wire colors for correct SCR installation. It also shows the locations of the tightening bars. Figure 5-2 SCR Polarity M160 / M250 M420 / M600 / M840 White wire to GT terminal, Red wire to T terminal White wire t...

Page 39 - Logic Control Module Resistance Test; Logic Control Module

Troubleshooting 5-5 MN894 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 defl...

Page 40 - Table 5-3 Troubleshooting Chart; Symptom

5-6 Troubleshooting MN894 Table 5-3 Troubleshooting Chart Symptom Cause Corrective Action Motor is not connected. Connect motor to T1, T2 and T3 of control. MCP trips as it is ST contact on control is always closed. Repair or replace logic control module. MCP trips as it is closed (also see Improper...

Page 43 - Reset an Overload Relay; the “Tripped” position.; Figure 5-6 Overload Relay; Fuse Replacement

Troubleshooting 5-9 MN894 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...

Page 45 - Identification

Section 6 Specifications and Product Data Specifications and Product Data 6-1 MN894 Identification Three Phase Starters Control Type M- Multipurpose M B Control Group A - Self powered logic control module B - Logic control modules that require 115 or 230VAC. Input Voltage Code 7- 208/230/460VAC (60H...

Page 46 - Multipurpose Control Specifications; Three Phase Starters

6-2 Specifications and Product Data MN894 Multipurpose Control Specifications Three Phase Starters Input Voltage MA7-008 MA7-016 MA7-030 Voltage VAC MA8-008 MA8-016 MA8-030 VAC 3PH 60Hz HP I C HP I C HP I C 230 2 5 10 460 8 8 10 16 20 30 575 5 10 25 Input Voltage MB7-055 MB7-080 MB7-160 MB7-250 MB7-...

Page 48 - OR; Wire Size Torque Specifications Size 8,16

6-4 Specifications and Product Data MN894 Wire Size & Tightening Torque Specifications OR (A) (A) (C) (D) (D) (B) (B) (D) (D) GND GND 8, 16 Amp Control Only Combination Starter and Non-Combination Starter and Control Only Line Input Motor Output Load GND GND Control Connections Line Input Motor ...

Page 49 - Specifications and Product Data 6-5; Mounting Dimensions; Open Panel; Dia; Open/Panel Dimensions

Specifications and Product Data 6-5 MN894 Mounting Dimensions Open Panel A Dia B w h d Open/Panel Dimensions Amp R ti Control Only Non-Combination Starter Combination Starter p Rating A B h w d Dia A B h w d Dia A B h w d Dia 8 12.25 10.25 11.63 9.63 10.16 0.25 21.00 14.50 19.50 13.00 10.16 0.50 21....

Page 50 - -6 Specifications and Product Data; Continued; NEMA 1 Dimensions

6-6 Specifications and Product Data MN894 Mounting Dimensions Continued NEMA 1, 3R and 12 A Dia B w h d NEMA 1 Dimensions Amp R ti Control Only Non-Combination Starter Combination Starter p Rating A B h w d Dia A B h w d Dia A B h w d Dia 8 14.00 12.00 11.00 11.00 11.35 0.28 24.00 16.00 21.88 11.00 ...

Page 51 - Specifications and Product Data 6-7; Connection Diagrams; Combination and Non-Combination Starter and Control only; Tachometer is only required when LCM is used in Tach Feedback mode.

Specifications and Product Data 6-7 MN894 Connection Diagrams MA Style 8, 16 and 30 AMP Combination and Non-Combination Starter and Control only 1312 11 10 987654321 16 17 14 15 19 20 CloseTo Run Start /Run ShuntTrip RampEnd TachInput MTRPWR CURMON CT Input OL 97 98 R X 115VAC A B F3 A F1 A F2 B B 1...

Page 52 - -8 Specifications and Product Data

Section 1 General Information 6-8 Specifications and Product Data MN894 Connection Diagrams Continued MB Style 8, 16 and 30 AMP Combination and Non-Combination Starter and Control only 1312 11 10 987654321 16 17 14 15 19 20 CloseTo Run Start /Run ShuntTrip RampEnd TachInput MTRPWR CURMON CT Input OL...

Page 53 - Specifications and Product Data 6-9; MA Style 55 and 80 AMP NEMA 1 and Panels

Section 1 General Information Specifications and Product Data 6-9 MN894 Connection Diagrams Continued MA Style 55 and 80 AMP NEMA 1 and Panels Combination and Non-Combination Starter and Control only 1312 11 10 987654321 16 17 14 15 L1L2L3 GL1GL2GL3 GT1 GT2 GT3 T1 T2 T3 19 20 CloseTo Run Start /Run ...

Page 54 - -10 Specifications and Product Data; MB Style 55 and 80 AMP NEMA 1 and Panels

Section 1 General Information 6-10 Specifications and Product Data MN894 Connection Diagrams Continued MB Style 55 and 80 AMP NEMA 1 and Panels Combination and Non-Combination Starter and Control only 1312 11 10 987654321 16 17 14 15 L1L2L3 GL1GL2GL3 GT1 GT2 GT3 T1 T2 T3 19 20 CloseTo Run Start /Run...

Page 55 - Specifications and Product Data 6-11; NEMA 1 & Panel Mounted Size 160; Number of cooling fans depends on the FLA rating.

Section 1 General Information Specifications and Product Data 6-11 MN894 Connection Diagrams Continued NEMA 1 & Panel Mounted Size 160 − 840 AMP Control Only 1312 11 10 987654321 16 17 14 15 L1L2L3 GL1GL2GL3 GT1 GT2 GT3 T1 T2 T3 19 20 CloseTo Run Start /Run ShuntTrip RampEnd TachInput MTRPWR CUR...

Page 57 - 40 AMP Combination & Noncombination Bypass

Section 1 General Information Specifications and Product Data 6-13 MN894 Connection Diagrams Continued NEMA 12 Size 160 − 840 AMP Combination & Noncombination Bypass 1312 11 10 987654321 L1L2L3 GL1GL2GL3 GT1 GT2 GT3 T1 T2 T3 19 20 CloseTo Run Start /Run ShuntTrip RampEnd TachInput MTRPWR CURMON ...

Page 58 - -14 Specifications and Product Data

Section 1 General Information 6-14 Specifications and Product Data MN894

Page 59 - Glossary; the Multipurpose Soft Starter control.

Appendix A Reference Information Appendix A-1 MN894 Glossary BP Bypass Contactor CC Current Calibrator CCW Counterclockwise CL Current Limit CM Current Monitor CS & RS Resistor & Capacitor series circuit CUR MON Current Monitor CT Current Transformer CW Clockwise FLA Full Load Amperes (Motor...

Page 61 - Quick Reference Chart

Appendix A-3 MN894 Quick Reference Chart Ramp Up Time (3-50 sec.) Tachometer: Time to reach full speed. Voltage: Time to reach full speed. 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=O...

Page 62 - Overload Relay Adjustment; setting. Refer to the table that represents the starter size.; Select the table that matches you starter size only. Do not use the; Overload Relay; - Electronic Class 30

A-4 Appendix MN894 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 t...

Page 63 - Circuit Breaker Adjustment; of motor; Table B-1 Code Letter Definition; Phase Inrush Current Calculation; Inrush AMPS; KVA; Rated Volts

Appendix B Circuit Breaker Adjustments Adjustments B-1 MN894 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 ...

Page 64 - Inrush; to avoid damage to equipment. If set too high, the circuit breaker; Turn on power and start the motor.; Figure B-1 Magnetic Circuit Breaker

Section 1 General Information B-2 Adjustments MN894 Example: 3 phase Motor rated at 50 HP at 460VAC, 65 amps (continuous), code letter J. I Inrush + ǒ 7.5 x 50 x 577 460 Ǔ + 470Amperes Circuit Breaker Adjustment The calculated Inrush Amps value is used to initially set the breaker. If the circuit br...

Page 65 - Baldor District Offices

Page 66 - BALDOR ELECTRIC COMPANY; Baldor Electric Company

BALDOR ELECTRIC COMPANY P.O. Box 2400 Ft. Smith, AR 7290 1 − 2400 (479) 646 − 4711 Fax (479) 648 − 5792 © Baldor Electric Company MN894 Printed in USA 9/06