Starting Squirrel Cage Motors

Starting Squirrel Cage Motors
Seminar Starting Squirrel Cage Motors March 99 1 1 1

Electronic soft starters
Part Presentation Slides 1 Starting AC Motors 2 Electronic soft starters 3 Digital soft starter “RVS-DN” 4 Analog soft starters “RVS-N“ 5 Analog soft starter “Solstart” 3 2 3

Starting the motor Three basic methods for starting squirrel cage motors : * Full voltage - Direct On Line (D.O.L.) * Reduced voltage - Electro mechanical methods * Reduced voltage - Electronic methods 3 3 3

Direct On Line (D.O.L.) Starting
Starting Voltage - Full voltage at starting 100% Un t Un 16 4 4

Direct On Line Starting
Starting Current - Typically % In, depends on motor design. RPM In Istart 15 5 5

* Starting Torque (M start) - Typically % Mn * Max Torque (Mmax) - Break Down Torque can reach 220% Mn Mstart RPM M operation Mn Mmax Load 36 6 6

Acceleration Torque - The difference between motor and load torque's, determines the Acceleration Time. M load M acceleration 36 7 6

Start Time - the high Acceleration Torque results in fast acceleration of motor speed, typically less than 1 sec. Nn t 36 8 7

1 sec. Current Inrush 19 8 9

1 sec. Mechanical Shock 20 10 9

Reducing Starting Current & Torque
Reducing Inrush Current is essential : * When starting from weak power supplies like fully loaded transformers, long cables, diesel generators, etc. Reducing mechanical shock is essential : * To increase life expectancy of belts, gears, shafts and motors. * To reduce maintenance requirements * To prevent damage to fragile loads 3 11 11

Reducing Starting Current & Torque
* Reducing Inrush Current & Mechanical Shock in squirrel cage motors can be done by reducing motor voltage during starting * Reducing voltage during starting can be done by the old electro- mechanical systems like Star-delta, Auto-transformer, Part winding, Starting Resistors or by modern Electronic Soft Starters 3 12 12

Reducing Starting Voltage
When Starting Voltage is reduced: * Starting torque is reduced in square proportion to voltage reduction * Starting current is reduced in direct or square proportion to voltage reduction - depending on starting method 3 13 13

Direct On Line - Summary
Advantages: Simple, Small size, Low price. Disadvantages: * High inrush current % In which may cause voltage drops in supply system, nuisance tripping & light dimming. * High starting torque % Mn which may cause mechanical damages to gears, transmissions and fragile loads. Price factor : times Soft starter 18 10 14

Y/D Starting Starting voltage - Y connected (58% Un), transfer to Delta (100% Un) by timer - open loop control. t U Y = 58% Un D Y Un U Y transfer point 16 14 15

Y/D Starting Starting Current - Typically 250% In, current is reduced in square proportion to voltage reduction RPM I Y I start DOL D Y Transfer point Reduced Starting Current 43 15 16

Y/D Starting Starting Torque - Reduced by the square proportion to voltage reduction, the voltage remains constant during most of the starting time. M start Y = (0.58)2 x M start (A.T.H) = 0.33 x M start RPM M operation M Y M acceleration Y D M DOL Reduced Starting & Acceleration Torque 38 16 17

Y/D Starting Start Time - Extended acceleration time due to lower acceleration torque D Y/ Nn t D.O.L 38 17 18

Y/D Starting - Current Inrush
1 sec. current spike during transfer from Y to D (especially in varying type loads) 22 18 19

Y/D Starting - Summary Price factor: .6 - 2 times Soft starter
Advantages: Simple, Small size, Inexpensive (in lower ratings), Lower starting currents. Disadvantages: * Non-adjustable starting characteristics * Possible high switching current & torque (expensive closed transition) * Open loop control * 6 wires to the motor * No optional features (only soft start) * No motor protection. Price factor: times Soft starter 21 20 20

Auto-transformer Starting
Advantages: Lower starting currents. Disadvantages: * Bulky * Expensive * Limited number of operations per hour * Complicated change of starting parameters * Switching transients - expensive closed transition. Price factor : times Soft starter 21 21 21

Electronic Soft Starters
Using 6 Thyristors (SCRs), 2 per phase, in an anti-parallel connection 3 L1 L2 L3 31 22 22

Thyristors (SCR’s) firing system
Vc The left thyristor conducts during the positive period of the sine wave, when Vc is On and can be turned Off when the current is at zero crossing. 32 23 23

Vc The other thyristor is coupled in an anti-parallel method and conducts in the negative half cycle. 33 24 24

Thyristor firing controls the soft starter output voltage U start Zero Crossing t soft start Phase Control 34 25 25

Voltage Ramp-up Voltage ramp-up (without Current Limit) t soft start
Time Voltage ramp Un U1 t2 t3 t4 t1 U2 U3 U4 U start 35 26 26

Current Ramp-up Current Ramp-Up (without Current Limit) I start
Current with Soft-starter RPM In I soft I start 45 27 27

Current ramp-up with Current Limit
Voltage & current increases until the current reaches Current Limit. The Voltage will not increase until current begins reducing, as the motor approaches nominal speed. I n 4 X Current Limit RPM I start t soft start Time limit Un U start 48 28 28

Calculating motor’s torque
Motor torque with soft starter M soft = ( U soft / U n ) 2 * M start Assuming M start = 1.8 * M n Assuming U start =0.5 Un (0.25 Un) M soft = (0.25) * 1.8 = 0.45 M start Torque is reduced by the square of the voltage reduction 39 29 31

Motor Voltage / Torque Ratio
RPM M D.O.L M TU5 TU3 TU4 TU6 TU2 TU1 t6 t2 t3 t4 t5 t1 V U5 U3 U2 U1 t2 t3 t4 t6 t1 t5 U4 35 32 30

Torque with & without Current Limit
Torque / Voltage curves with and without Current Limit with current limit M max RPM Mn M saddle M start without current limit 50 33 31

Soft Starter - Current Inrush
with current limit 1 sec. 25 32 34

Soft Starter - Mechanical shock
1 sec. 26 33 35

Summary D.O.L Y / D Soft-starter Motor current Motor torque 27 34 36

Soft starter - summary Disadvantages: Relatively expensive, higher sophistication Advantages: * Solid state - no moving parts, less maintenance * Reduced starting current & mechanical shock * Smooth, stepless acceleration & deceleration * Closed current loop starting * Easy adjustments for all applications * Comprehensive motor protection package * Special features: “Pump Control”, Soft stop, Slow speed with electronic reversing, Dual adjustment, Energy saver, etc. 24 35

Soft Starter Line RVS-DN Digital 8-2700A 220 - 690V
RVS-DN “ A 1000V RVS-DN “ A Marine Type HRVS-DN “ A V RVS-N Analogue 8-170A V SOLSTART “ 8-17A V SEM-N (navy) “ 8-31A V 54 36

RVS-DN Digital Soft Starters for Heavy Duty Industrial Applications 64
37

The RVS-DN family 55 - 90 KW 250 - 450 KW 4 - 37 KW 110 - 220 KW
Size B Size D Size A Size C KW KW KW KW 66 38

RVS-DN Advantages Heavy Duty Design: 400% In, 30 sec. at 50°C, 4 starts an hour Comprehensive Range: A, V Second Generation Digital Field proven experience Fully featured: Control, Protection & Supervision Comprehensive Motor Protection User Friendly: Default settings, LCD display, Selectable languages 56 39

UL RVS-DN Approvals cUL UL Approved : 8-820A, USA
cUL Approved : 8-820A 1100A and above are designed to meet cUL requirements CE Approved (EMC & Safety) : A 1800A and above are designed to meet CE requirements Lloyd’s Approved (ENV 1 & ENV 2) : A 1800A and above are designed to meet Lloyd’s specifications for ENV1 & 2 requirements UL Approved : 8-820A, 1100A and above are designed to meet UL requirements Marine & Offshore Canada European USA 56 40

Selector Guide Starter Frame Motor HP Type Size 230V 460V 575V
RVS-DN A RVS-DN RVS-DN RVS-DN RVS-DN RVS-DN RVS-DN 105 B RVS-DN RVS-DN RVS-DN 210 C RVS-DN RVS-DN Starter should be selected according to motor’s Full Load Amp and starting conditions 85 41

RVS-DN D RVS-DN RVS-DN RVS-DN E * RVS-DN RVS-DN 1800 RVS-DN F * RVS-DN 2700 Starter must be selected according to motor’s Full Load Amp and starting conditions * To be used with a by-pass contactor 85 42

RVS-DN Block Diagram M * Tachometer in Firing circuitry I measurements
Inputs (Prog.) LCD Display Power Supply SCRs V measurements * RS-485 Comm. * Thermistor in * Insulation * Analogue Out Statistics Faults Keypad LEDs Outputs MICRO PROCESSOR Preparation Remain Active All Protection For By-pass Options : Memory : Isolated Relay 8

Size A (8-72A) Line To by-pass (option) LCD (selectable languages)
To Motor Control terminals (Plug-in) LCD (selectable languages) To by-pass (option) Line LEDs (status display) IP 20 Finger protected for safe operation 65 43

Size B (105-170A) (Bus bar cover removed) Line To Motor Power Section
Control Module (Identical for sizes B-F) Front protected for safe operation 65 44

Size C (210-390A) Line (Bus bar cover removed) To Motor C/T Power
Control Module Power Section To Motor Line (Bus bar cover removed) C/T Front protected for safe operation 65 45

Preparation for By-pass
Line To motor To by-pass C / T 46

Preparation for By-pass
M L 2 L 3 L 1 47

Size D (460-820A) Line Load (Bus bar cover removed) C/T Power section
Control module Power section (Bus bar cover removed) 65 48

Size E (1100-1800A) Line Power Section C/T Control Module To Motor 65
49 2

Control Module (identical for sizes B-E)
* Insulation Test board * Analogue board * Tacho encoder board (only one) Communication Board RS 485 (MODBUS) Control Supply I / O Optional boards: Power Supply Board Control Transformer Plug Dip Switch E PROM 50

Dip switch No. Function OFF (default) ON 1 Display Minimum Maximum
2 Tacho feedback Disabled Enabled 3 Mains / Generator Mains Generator 4 Always OFF 5+6 Language selector English, French, German, Spanish 7 Extended range Disabled Enabled 8 Software lock Open Locked OFF 85 51

Front panel Keypad, LCD & LEDs
Two lines - 16 characters each, Back light (optional) Selectable languages - English, German, French, Spanish Motor data, Parameter setting, Fault diagnostic, Statistical data Digital Reduced Voltage Starter RVS-DN Mode Store Reset Select On Start Run S.Stop Stop E.Save / Slow D. Adj. / Rev. Fault CURRENT LIMIT 400% 8 LEDs for quick status display 6 keys, menu driven software, default parameters 69 52

Start & Stop Parameters
Initial Voltage Current Limit Acceleration Time (Ramp-up Time) Deceleration Time (Ramp-down Time) - Soft Stop Pump Control Dual Adjustments Pulse start Diesel Generator Starting 35 53 26

Initial Voltage Initial Voltage - determines the Initial Torque (the Torque is reduced in the square proportion of the voltage reduction). Adjustable : 10-50% (80%) Un, should be set for the motor to start turning immediately after Start signal is initiated 10% Initial Voltage 50% Un 35 26 54

Acceleration Time Acceleration Time - Determines the Voltage Ramp-up Time, from Initial to Full Voltage. Adjustable :1-30 (90) sec. Set to the shortest acceptable time. Time Voltage Ramp-up Time Un U start 30 sec 2 35 26 55

Current Limit Current Limit - Determines the maximum current during acceleration process and the acceleration time to full speed. Adjustable : % (500%) I FLA, Set to the highest acceptable current. Current Limit U start t soft start U C. L U1 Un I start RPM 400% 100% 48 28 56

Current limit / Start time Ratio
Lower Current Limit => longer Start Time Time 4 x In 5 10 15 20 25 30 In 3 x In 51 30 57

Deceleration Time “Soft Stop”
Deceleration Time - Determines the Voltage Ramp-down Time, from Un to zero. Adjustable: 1-30 (90) sec. Set to the shortest acceptable time. Un Speed Deceleration Time 2 30 / 90 sec 35 58

Pump Control Program Designed to eliminate
Over-Pressure during starting. Water-Hammer during stopping. Imperative when pumping to higher elevations or into a high pressure pipe system 59

Pump Starting D.O.L. When starting D.O.L high Acceleration Torque causes rapid increase in pump speed, fast change in flow & consequently high Pressure. The high pressure in the pipe system may result in damage to pipes, fittings, joints, etc. Time Torque M start Accel. Motor (D.O.L) Voltage Speed Load 60

Standard Soft Starters
When starting with a standard soft starter - Starting Torque is reduced drastically, however Peak Torque still remains high, causing high Acceleration Torque towards the end of the starting process. Peak & Acceleration Torque must be reduced to extend the Acceleration time. Time Voltage With soft starter Slow Accel. Speed Torque M start D.O.L Load soft 61

RVS-DN Pump Control Pump Control “Start Curves” - Three special voltage ramp-up curves to reduce peak torque & extend Acceleration time. Adjustable: 1-3 Curves, set as required With soft starter Speed Time 1 2 3 DOL Time Voltage Area of Pump Control start curves Torque 3 Speed D.O.L 2 1 62

Pump Stopping When stopping with a D.O.L starter - speed is quickly reduced and flow abruptly stopped. This may cause a Water Hammer (mechanical shock and audible noise) with severe damage to pipes, joints, fittings, valves, etc. DOL opens Un Speed 63

Pump Control - Stop Curves
Stopping with a standard soft starter - when pumping to a higher elevation, motor torque may quickly fall below load torque (as torque decreases at the square of voltage reduction). This may cause abrupt stalling instead of smoothly decreasing speed to zero, creating the Water Hammer phenomenon. Stalling point Un Speed “Soft stop” 64

RVS-DN Pump Control Pump Control “Stop Curves” - enables selection between 3 special voltage ramp-down curves preventing stall condition and eliminating Water Hammer. Adjustable:1-3 Curve, Set as required Time Voltage Area of Pump Control stop curves With soft starter Speed 1 2 3 DOL Torque D.O.L Time 65

Pump Control - Final Torque
Final Torque - enables setting a point where motor stops when the valve closes - Before reaching end of deceleration, motor torque is lower than load torque and the valve closes, however motor may continue running. Adjustable: Min-Max., Set as required Time Check Valve closes and motor stops Voltage Speed Area of Pump Control Final Torque DOL 66

Dual Adjustment Two sets of parameters - for Variable Loads, Two Speed Motors and D.G. starting Adjustments: Initial Voltage Current Limit Acceleration Time Deceleration Time Motor FLA Starting Mode (Utility or D.G) Dual Adjust Characteristic Voltage Time Standard 35 67

Energy Save Energy Save - potential saving and P.F. improvement on lightly loaded motors . Adjustable: 0-10 (Min-Max) Note - may require filter to meet CE requirement (European) I motor time In Un 35 68

Slow Speed Slow speed - Motor operates at 1/6 Nn, Forward or Reverse (no contactors required) Adjustments: Torque at Slow speed (Min-Max) Max time sec. Speed 1/6 Reverse Max. Slow Speed Time 30 Sec. Nn 1/6 Forward Applications * Positioning * Sewage pumps 35 69

Pulse start Pulse start - a pulse of 80% Un (without Current Limit) to break free high friction / inertia loads. Adjustable: Pulse Time sec. Un time sec. 35 70

Tacho feedback Tacho Feedback - for linear acceleration of special loads Adjustable : Consult factory Voltage Speed RPM +10 DC Applications * Conveyor belts 35 71

Starting from a Diesel-Gen.
When starting from older D.G. sets (especially those equipped with low cost Voltage Regulators) both voltage and frequency are unstable, causing irregular firing of the thyristor. The RVS-DN is equipped with a special program overcoming the voltage and frequency instability. To operate Gen. Mode set Dip Sw. 3 to On and energize the Dual Adjustment Terminal. When operating in Generator mode, motor must be loaded. When motor can operate from Mains and D.G (stand-by D.G) set Dip Sw. 3 to On. However, Dual Adjustment Terminal should be energized only when D.G. is running. 35 72

Motor & Starter Protection
Before During During During Starting Starting Running Stopping Motor Insulation (optional) Motor not connected No. of starts & Start Inhibit Too long start (Stall) Phase Loss Phase reversal Under / Over Voltage Under Current Shear-pin (Instantaneous) Over Current (O/L) External Fault High Motor Temp (optional) Shorted SCR Starter over-temp 83 73

Low Motor Insulation (optional)
Motor Insulation (optional) - tests motor insulation level when motor is not running (requires a Line Contactor or disconnecting a Line C/B etc. ). Adjustments: Alarm Level: Mohm, Set as required Trip Level: Off, Mohm, Set as required Applications * Submersible pumps * Harsh environments * Motors not running for a long period of time. S 83 74

Motor Temp. (optional) Motor Thermistor Input - Over Temp Protection (option, in place of Insulation Card) Adjustments: Thermistor type: PTC or NTC Trip Level: Off, Kohm Note - the Analogue card contains also Analogue Output, related to motor’s current (0-10VDC, 4-20mA, 0-20mA) 83 75

Excessive starts Max. Number of Starts - preventing excessive starts during a short period of time. Adjustments: Permitted Number of Starts: Off, 1- 10 Start period: min. Start Inhibit Time (after Too Many Starts): min. 83 76

Stalled Motor Max. start time - Preventing Stall condition, trips the starter if current is not reduced below Motor FLA within the adjusted time. Adjustments: 1-30 (240) sec. Max. Starting Time Starting current 20 10 30 83 77

Jam Protection Jam Protection - Trips the starter in less than 1 cycle when current exceeds 850% IFLA. 850% IFLA Trip Applications * Conveyors * Agitators * Complex Machinery 83 78

Electronic Shear-pin Shear-pin Protection (“Immediate Relay” set to “Shear-pin”) - Stops (no trip) the motor when current exceeds the set level, with an adjustable time delay. Adjustments: Trip Current % Motor FLA (during starting 850%) Shear-pin Delay sec (no delay at 850%) 850% IFLA Trip Applications * Shredders * Complicated drive systems 83 79

Electronic Shear pin A G Shredder M PLC Rev. For. Electronic Ammeter
Williams Tire Shredders * When system was jammed the electronic ammeter sent a signal to the PLC which tripped the Forward Contactor and closed the Reverse. * The Forward Contactor was quickly damaged by the high opening currents. 65 80

Electronic shear-pin (Williams Shredder)
Shear-pin M For. PLC C/B RVS-DN Rev. L N The “Immediate Relay” is designated as “Shear-pin”, upon Jam (delayed up to 5 sec) the starter will stop (no trip) and signal the PLC. The Forward Contactor will open under no-current, the Reverse Contactor will close and the soft starter will be re-started. 86 81

Overload Electronic overload - with selectable curves Adjustments:
O/L Trip level: % I FLA Trip Time at 500% I FLA: 1-10 sec 150% 10 sec t 75% 500% 1 sec I 115% trip time at 500% FLA O/L setting 83 82

Under Current Under current - Trips the starter when current decreases below the U/C Trip level after the selectable time delay. Under current auto reset allows for restarting after a predefined period of time, to re-check the under current status. Adjustments: Trip Current: Off, 20-90% I FLA Trip Delay 1-40 sec. Start I FLA 20% 40 sec. 80% 20 90% 2 Applications * Dry running pumps * Broken belt / gear * Closed air inlet (fan) 83 83

Under / Over Voltage Under Voltage - Trips the starter when voltage drops below the U/V Trip level after the selectable time delay. With programmable auto-reset. Adjustments: Trip level V (Line - Line) Trip Delay 1-10 sec. Over Voltage - Trips the starter when voltage increases above the O/V Trip level after the selectable time delay. Trip level V (Line - Line) 83 84

Phase Loss & Wrong Sequence
Phase Loss - Trips the starter when one or two phases are missing for over 1 sec. With programmable auto-reset. Phase Sequence - Trips the starter when phase sequence is wrong Adjustments : Protection Enabled / Disabled 83 85

Motor Not Connected Wrong Connection - Trips the starter if motor is not connected to starters’ Load terminals, 1,2 or 3 wires. C R 400V * When motor is connected, voltage between phases will be approx 3V. * When motor is not connected, voltage between phase will be full voltage. 83 86

External Fault External Fault - Trips the starter 2 sec. after the contact closes. RVS-DN Applications * Water level for pumps * Oil level for compressors 83 87

Soft Starter Fault Shorted SCR - Prevents starting when one or more SCR have failed (short circuited) C R When SCRs fail, there is a short circuit between Line and Load of the same phase. 83 88

Fault & Resetting Upon fault The starter trips and locks in fault mode
The “Trip” LED lights up The LCD displays fault cause (Shear-Pin) The Fault Relay changes position The Immediate & End of Acc. Relays return to original position Same data is transmitted through the RS 485 The starter records fault current in statistical parameters Resetting after fault removal Front panel - Reset key, Hard wire - Terminals 7 or 8, RS 485 Possible only after Start signal is removed 83 89

Soft Starter Fault Heatsink Over temperature - Trips the starter when heatsink temp. rises above 85°C. SCR Protection: by MOVs (Metal Oxide Varistors) 83 90

Control wiring L N Control Supply can be 115 or 230VAC - must be specified (By special order, DC voltage may be supplied for sizes B-F) Common Neutral Soft Stop Stop E.Save / Slow / Reset D. djust / Reverse / Reset Start 86 91

Control Wiring Plug Control Transformer Power Supply Board
Control Supply Power Supply Board Control Transformer Plug 92

Control Supply Internal Jumper
* When connected to A - fan (s) will operate as long as Control Supply is connected to Terminals 1-3 * When connected to B - fan (s) will operate when Control Supply is connected to Terminal 2 (for example through a N.C. contact of the by-pass contactor) * When connected to C - Fan (s) will operate when relay A closes (Automatically upon start signal, stops 5 min. after stop signal or when by-pass contactor closes. Notes : 1. It is recommended to leave at factory default (A). 2. For size A, 44-72A, modification should be done by a field technician. 2 L1 N B A C 3 1 Jumper R 86 93

! Control wiring Aux Contact “Immediate” “End of Acc.” “Fault”
Stop Soft Stop Start E.Save / Slow Sp / Reset D. Adjust / Rev. / Reset Common External Fault Tacho feedback Neutral Aux Contact “Fault” “End of Acc.” “Immediate” 86 94

Control wiring Neutral
Neutral N or Gr. (1) (1) For Mains system with Ground and / or Neutral - connect Terminal 21 to N or Gr. (2) For Mains system without Ground and Neutral - leave Terminal 2 open N 86 95

Control wiring L N Same voltage for Control Supply (1-3) and Control Commands (4-9) Common Neutral Soft Stop Stop E.Save / Slow / Reset D. Adjust / Reverse / Reset Start 86 96

Control wiring Common Neutral Different voltages for Control Commands (4-9) can be AC or DC (must be specified) Soft Stop Stop E.Save / Slow / Reset D. Adjust / Reverse / Reset Start Control Command voltage N L 86 97

Control wiring - Start / Stop
Motor will soft start when C closes and stop immediately when C opens L N Common Soft Stop Stop E.Save / Slow / Reset D. Adjust / Rev. / Reset Start C 86 98

Motor will soft start when C closes and soft stop when C opens L N Common Soft Stop Stop E.Save / Slow / Reset D. Adjust / Rev. / Reset Start C 86 99

Common Soft Stop Stop E.Save / Slow / Reset Start C2 C C1 D. Adjust / Rev. / Reset Push-button operation - Motor will soft start when C closes, soft stop when C1 opens and stop immediately when C2 opens 86 100

Common Soft Stop Stop E.Save / Slow / Reset Start C L N D. Adjust / Rev. / Reset 86 101

Control wiring - Energy Save
Energy Save will operate when Terminal 7 is designated as Energy Save and C closes. For automatic operation use a jumper. Common Soft Stop Stop E.Save / Slow / Reset Start N C D. Adjust / Rev. / Reset 86 102

Control wiring - Slow speed
Slow Speed will operate when Terminal 7 is designated as Slow Speed and C closes before motor starting. Common Soft Stop Stop E.Save / Slow / Reset Start L N C D. Adjust / Rev. / Reset 86 103

Control wiring - Remote Reset
* Remote (hardwire) Resetting will operate when Terminal 7 or 8 are designated as Reset and C1 or C2 close Common Soft Stop Stop E.Save / Slow / Reset D. Adjust / Rev. / Reset Start N C2 C1 86 104

Control wiring - Dual Adjustment
Dual Adjustment (secondary parameter setting) will operate when Terminal 8 is designated as Dual Adjust and C1 closes. L Common Soft Stop Stop E.Save / Slow / Reset D. adjust / Reverse / Re. Start N C 86 105

Control wiring - D.G. Program
D.G. Program will operate when Dip Switch 3 “Generator” is set to On, Terminal 8 is designated as Dual Adjust and C1 closes. L Common Soft Stop Stop E.Save / Slow / Reset D. Adjust / Reverse / Re. Start N C 86 106

Control wiring - Slow speed Reverse
Common Soft Stop Stop E.Save / Slow / Reset D. Adjust / Reverse / Res. Start N C2 C1 Slow Speed Reverse will operate when Terminal 7 is designated as Slow Speed, Terminal 8 is designated as Reverse and when closing C1 (before starting) and C2 (before or during motor running) 86 107

Auxiliary Relays Auxiliary Relays : C/O, 8A/250VAC
* Immediate - with On and Off delays * Fault - prog. Fault / Fale- safe * End of Acceleration - with On delay 108

“Immediate Relay” Immediate / Shear pin L Relay
Immediate / Shear pin Relay Selection by designating the Immediate Relay as: * Immediate - with On and Off delays * Shear pin - When relay is designated as Shear-pin 86 109

“Immediate Relay” - Immediate
Immediate Relay Applications * Operating a valve * Opening / closing a brake Off Delay after Stop On delay after Start 86 110

“Immediate Relay” - Immediate
D. Adjust Immediate Relay Creating special Starting Curves: 1. Designate “Imm Relay” as Immediate and set On Delay time 2. Designate Terminal 8 as “Dual Adjust” and set parameters On delay Voltage Ramp-up 86 111

By-pass Contactor End of Acceleration Relay M
L N M End of Acceleration Relay 86 112

Fault Relay Fault Relay 1 2 3 4...9 13 14 15 16 17 18 19 20 21
Fault Relay Fault Relay programmable : * Fault at NO, upon fault are NC, returns upon fault reset * Fault Fail Safe - Upon Control Supply connection at NC, upon fault are at NO, returns upon fault reset. 86 113

Control wiring - External Fault
External Fault input - connected between 19 and 21 (Neutral), use short wires, can be used only when 21 is connected to Ground or Neutral 86 114

Control wiring - optional cards
25 26 27 Motor Insulation Alarm 23 24 22 Communication Board (+) RS485 (-) RS485 N.C. Digital Tacho Board Encoder (-) (+) Ground (+) Analogue (-) Analogue Thermistor 28 29 30 31 32 Analogue I/O Board 86 115

Wiring M L2 L3 Fuses or Circuit breaker Line Contactor (when required)
Soft Starter M L1 65 116

Line & By-pass contactors
“Preparation for By-pass” eliminates the need for additional O / L M 65 117

Power Factor Capacitor
Capacitor (when used) must be at Line side L1 L2 L3 Soft starter Motor Fuses or circuit breaker M 65 118

? Minimized Mode Mode Select Store Reset
PAGE PAGE PAGE PAGE PAGE 9 ? % OF MOTOR FLA MOTOR INSULATION 52,8 Mohm FLC FLA UCT UCD OCT OLT OLD UVT UVD OVT OVD STC PT IV CL AT MST NOS SP SI CD SPC DT FT DA: IV CL AT DT DA: FLA 105 ES SST MSST SEQ INSULAT RST NO 0, ,1 NO I7 I8 FREL IMREL DRV BAUD PAR SER MAIN PARAMETERS STARTER FLC 105 AMP. MOTOR FLA STORE ENABLE START PARAMETERS SOFT START CURVE 0 (STANDARD) START TACHO GAIN 0 (MIN. GAIN) PULSE TIME 0 SEC. INITIAL VOLTAGE 30 % CURRENT LIMIT 400 % OF FLA ACC. TIME 10 SEC. MAX. START TIME 30 SEC. NUMBER OF STARTS 10 STARTS PERIOD 30 MIN. START INHIBIT 15 MIN. RUN CONTACT DEL. 5 SEC. STOP PARAMETERS SOFT STOP CURVE STOP TACHO GAIN DEC. TIME FINAL TORQUE UNDERCURR.DELAY 10 SEC. O/C - SHEAR PIN 850 % OF FLA OVERLOAD TRIP 115 % OF FLA OVERLOAD DELAY 4 SEC - AT 5 FLA UNDERVOLT. TRIP 300 VOLT UNDERVOLT. DELAY 5 SEC. OVERVOLT. TRIP 480 VOLT OVERVOLT. DELAY 2 SEC. UNDERCURR. TRIP 0 % OF FLA STATISTICAL DATA LAST STRT PERIOD NO DATA LAST START MAX. I TOTAL RUN TIME 0 HOURS TOTAL # OF START LAST TRIP TRIP CURRENT TOTAL # OF TRIPS Mode Select Store Reset Minimized Mode 70 119

? Maximized Mode Mode Select Store Reset
PAGE PAGE PAGE PAGE PAGE 8 DUAL ADJUSTMENT PARAMETERS DA: INIT. VOLT. 30% DA: CUR. LIMIT 400 % OF FLA DA: ACC. TIME 10 SEC. DA: DEC. TIME DA: MOTOR FLA 105 AMP. STORE ENABLE D.ADJ. PARAMETERS EN. SAVE & SL.SPD. PARAMETERS SAVING ADJUST. 0 MIN. SLOW SPEED TORQ. 8 MAX. SLOW SP. TIME 30 SEC. STORE ENABLE EN. SAVE & SL. SPD. FAULT PARAMETERS PHASE SEQ. Y/N NO INSULATION ALARM OFF THERMISTOR TRIP STORE ENABLE INSULATION TRIP AUTO RESET THERMISTOR TYPE PTC I/O PROGRAMMING PARAMETERS PROG. INPUT #7 ENERGY SAVER PROG. INPUT #8 DUAL ADJUSTMENT FAULT RELAY TYPE FAULT ANALOG OUTPUT NORMAL STORE ENABLE I/O PROG.PARAM. IMM/S.PIN RELAY IMMEDIATE RELAY ON DELAY 0 SEC. RELAY OFF DEL. COMM. PARAMETERS DRIVE NUMBER BAUD RATE 9600 PARITY CHECK EVEN SERIAL LINK NO 248 (OFF) STORE ENABLE Mode Store Reset Select Maximized Mode 73 120

Main Parameters Starter FLC 8 - 2700A (8, 17, 31, 44 .... )
Motor FLA % Starter FLC setting Under Current Trip Off, % Motor FLA setting Under Current Delay sec O/C Shearpin % Motor FLA setting O/C Shearpin Delay sec Overload Trip % Motor FLA setting Overload Delay sec 500% FLA) Under Voltage Trip V Under Voltage Delay sec Overvoltage Trip V Overvoltage Delay sec 35 121

Start Parameters Soft start curve 4 selectable curve (Pump Control)
Start Tacho Gain 6 levels of Tacho Gain Pulse Time sec. (2sec) Initial Voltage % Un (80%) Current Limit % Motor FLA setting (500%) Acceleration Time sec. (90sec) Max. Start Time sec. (240sec) Number of Starts & Off Starts Period min. Start Inhibit Period min. Run Contact Delay sec. 35 122

Fault Parameters Phase Seq.. protection Yes / No
Insulation Alarm Off, Mohm Insulation Trip Off, Mohm Auto Reset Yes / No (phase loss , Undervoltage) Auto Reset Yes / No (Under Current) Thermistor type PTC / NTC (optional) Thermistor Trip Off, Kohm 35 123

I / O Programming Prog. Terminal # 7 Energy Save, Slow Speed, Reset
Prog. Terminal # 8 Dual Adjustment, S.Spd.Reverse, Reset Fault Relay Fault, Fault - fail safe Imm Relay function Immediate / Shearpin Imm Relay On Delay Imm sec. / Shearpin sec. Imm Relay Off Delay Imm sec. / Shearpin sec. Analogue Output Normal, Inverted 35 124

Communication Parameters
Drive number Baud rate Parity check Even / Odd Serial link No & Off RS 485 with MODBUS RTU protocol can control and supervise up to 32 starters through a twisted pair. A Windows based software for Setting, Control & Supervision is available as an option. 35 125

Statistical Data Last start Period Last start max. current
Total run time Total number of starts last trip Trip current Total number of trips 35 126

Motor maintenance is not so simple
4 127

Ordering Information Starter Current Rating: 8 - 2700A
Mains voltage: V, V, V, V, 1000V Control voltage (terminals 1-3): V, V (DC by special order) Control inputs (terminals 4-9): 24-48Vac, Vdc Options: * Communication Board ( option # 3 ) * Motor Insulation Board # 4 * Analogue Board (cannot be used with # 4) # 5 * Special treatment for harsh environments # 8 * Preparation for by-pass (standard for size B) # ‎9 * Special width 536 mm (size C only) # A * Line & Load Bus-bars at bottom (size C, D only) # B * Door operated MMI, pre-ordered (size A-F) # D * Door operated Kit with additional MMI (size A-F) # DK * Back lit LCD # L * Lloyd’s ENV-1 & 2 Approval (8-1400A) # M * Tachometer Input for special applications # T * UL and cUL approval # U 128

Ordering Information Specify : RVS-DN S Starter FLC Mains voltage Control voltage Control supply Options Front Panel 50/60 Hz A CONTROL INPUT STARTER FLC MAINS VOLTAGE CONTROL VOLTAGE SERIAL NUMBER 72 400 V 230 V 129

RVS-N Analog Soft Starters
For Light Duty Industrial / Commercial Applications 64 130

UL RVS-N Advantages cUL Heavy Duty Design: 400% In, 30 sec. at 50°C
Range: 8-170A, V Second Generation Analog Field proven experience Incorporating : Soft Start, Current Limit, Soft Stop, Motor Protection Simple Installation and operation UL cUL in process 64 131

RVS-N A RVS-N RVS-N RVS-N RVS-N RVS-N RVS-N 105 B RVS-N RVS-N Starter should be selected according to motor’s Full Load Amp and starting conditions 85 132

Size A (8 - 72A) Line IP 20 Control terminals (Plug-in)
Finger protected for safe operation LEDs for status display Load 65 133

Wiring with Line & Bypass contactors
“Preparation for Bypass” eliminates the need for additional O / ‎L * Size B - Standard * Size A - Optional 65 134

Control wiring - standard unit
Stop Neutral Fault Start End of Acc. Fan a. Control voltage to the electronic circuitry is derived from three phase supply b. Connect control voltage to operate the fan (RVS-N 44 and above) c. Connect Neutral to terminal 6 to enable Phase Loss Protection (when Neutral is not available or not connected to Terminal 6 starter may not detect Phase Loss of lightly loaded motors. d. Realys rating 8A, 250VAC, 2500VA 86 135

Easy Adjustments Motor FLC 50-100% Starter FLA setting *
Initial Voltage % Un Current Limit % Motor FLA setting Ramp-up Time sec. Ramp-up Time sec. Overload Trip % Motor FLA setting, factory set. * e.g. for motor 100A and Starter 105A, set x 100 = 95% 35 136

Motor Protection Electronic overload Phase Loss
Heatsink Over Temperature 83 137

Ordering Information Starter Current Rating 8 - 170A
Mains voltage: V, V, V, V Fan voltage (RVS-N 44 and above): V, V Frequency 50 (5) or 60 (6) Hz Options: * Preparation for by-pass (size A only, standard on size B) # 9 * UL and cUL approval # U 138

Ordering Information Specify : RVS-N 170 - 400 / 6 - 230 - 9 - S
Starter FLC Mains voltage Frequency Fan voltage Options Front Panel 50 / 60 Hz A STARTER FLC MAINS VOLTAGE CONTROL VOLTAGE SERIAL NUMBER 72 400 V 230 V 60 Hz 139

Solstart Micro Soft Starter For Commercial Applications SOLSTART 64
140

“Solstart” Advantages
Max. Current: 8, 17A Initial Volltage: % Ramp-up Time: Sec. Ramp-down Time: Sec. Starts per houre 60 Protection IP 20 Mounting DIN Rail 141

Two-phase Control L2 L1 W U V L3
Start * L2 L1 W U V L3 a. Voltage is control no two phases only b. Internal by-pass relays 142

Easy Adjustments - 8A, 220-690V - Soft Start - Soft Stop - Compact
- Easy to use 35 143

RVS-DN Applications All types of standard 3 phase motors Pumps
Fans and blowers Compressors Transport systems Conveyors Mills and extruders Weak mains and generator networks 53 145 4

Off Shore Applications
Pumps Fans and blowers Screw & Piston Compressors Powerpacks Multi-purpose Hydraulic Crane Powerpack Thrusters Main propulsion Weak generator systems Ballast Pumps 53 146 5

RVS-N Applications Pumps Fans and blowers Compressors
Transport systems Conveyors Weak mains and generator networks 53 147 4

Marine Installations M/V Seaway Condor CGG Fohn M/V Seaway Eagle
M/S Arizona M/S Tromsbas M/S Siglar M/S Forde Jumior M/V Sprut M/S Leinebris CGG Fohn M/S Ordinat M/S Havbas M/V Northern Eagle M/S Syclus M/S Forde M/S Botnica Twelve Torpedo Radars ZIM Hadera - Pending 3 Italian Crude Oil carriers 3pc each 53 6 148

Marketing & Sales - End Users
Identifying potential customers - End Users Water Industry - Water & Waste water Utilities, Municipalities Industrial Customeras Cement - Conveyors, Pumps, Crushers, Compressors, Agrigates, Stone & Lime - Conveyors, Crushers Chemical & Petrochemical - Pumps, Fire fighting pumps, Compressors, fans Animal food - Crushers, Palletizers 53 149 5

About this presentation
This presentation intends to show you the quality, sophistication, functionality and reliability of our digital soft starters. Thank you for joining our seminar. Major parts of this Presentation were prepared by Henrik. L. Lillholt of Denmark 1997. 93 8 150

Starting Squirrel Cage Motors

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