LT6 Protection and Intelligence Combined - Barr
Contents
1. aale v 95 e e E ajaja ieee 35 chaning KM2 KM1 ajajaja Channel Reserved ETA A Reserved 96 18 Discrete input E 7 Motor 18 Discrete input E 7 stop E 7 17 _ Discrete input D Oi 17_ Discrete input D f Ch e O1 Forward EA KM1 Reverse EA KM2 T6 Discrete input C aa KM1 KM2 P Channel start start 16 Discrete input C B 02 02 Motor I5 Stop channels A and B _I5_ Stop channels A and B mer KM1 stop Reverse _ 1 14 Start channel B 97 74 Start channel B Fault 22 KM1 KM2 start si fils deaa ji Forward 13_ Start channel A g I 98 13 Start channel A 98 start tli yz Local or serial communication 7 Local or serial communication control of A and B 53 control of A and 93 11 _ Reset Alarm2. Description Nominal Sold in Catalog Number operating lots of temperature NOT C Triple probes 90 10 DA1 TT090 110 10 DA1 TT110 120 10 DA1 TT120 DA1 TT 130 10 DA1 TT130 140 10 DA1 TT140 150 10 DA1 TT150 160 10 DA1 TT160 170 10 DA1 TT170 a 2 SQUARE D 13 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Mounting Dimensions Protection relays LT6 P LT6 POM FM on 35 mm DIN rail Drilling pattern for panel mounting with M4 or ANSI 8 machine screws Ch W 4 65 in 118 mm 110 mm 3 5 15 in 2 12 in AN At EA4 Clip 131 mm 54 mm For M4 screws on pre slotted mounting plate AM1 PA LT6 POM FM weight 1 03 kg 2 3 Ibs Earth fault toroids TA30 PA50 IA80 MA120 SA200 5 N ne a c a s ci l al Dimensions in millimeters Dimensions in millimeters Type b b1 c cl c2 H Type a al b bi b2 c ci G H J K TA30 83 53 30 60 31 50 1A80 26 5 44 122 80 55 80 150 35 65 126 40 PA50 109 66 50 87 45 60 MA120 26 5 44 164 80 55 120 190 35 65 166 40 SA200 29 46 256 120 90 196 274 37 104 254 60 14 _ _ _ SQUARE D This document p
3. T1 _ Reset Alarm 34 94 C1 Common 1 C1 Common 1 1kQ 1kQ C2 Common 2 Ti C2 Common 2 Ti _C_ 4 PTC probes TD PTC probes 12 A2 NC A2 NG Earth fault H1 Earth fault H1 Ai toroid H2 Al toroid H2 1 SESE 271 TL1 L11 Li5 2T1 32 4 3L2 L21 L25 472 3L2 L21 L25 472 5L3 ey 5L3 L31 L35 6T3 SUS L31 L35 aana 613 SLBA Control via serial link communication Channels A and B set for independent contro Maintained stop 3 aded e 95 ay eae KM2 KM1 foal Reserved 96 a 18 Discrete input E I7 _ Discrete input D z Oi 16 Discrete input C ana KM1 KM2 02 15 Stop channels A and B 14 Start channel B Fault 97 13 _ Start channel A signalling 98 A Local or serial communication control of A and B 93 11 _ Reset Alarm 94 C1 Common 1 1kQ C2 Common 2 PTC probes m Control 7 A2 NC supply Earth fault H1 1 AT toroid H2 1L1 L11 L15 2T1 3L2 L21 L25 4T2 O 5L3 L31135 1 For DC control supplies the inputs 11 to 18 must be connected to the positive line 2 Disconnecting means and short circuit protection must comply with National Electrical Code and local codes 3 Local maintained stop must be connected when serial link is used without local stop push button 18 SQUARE D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Application Diagrams Motor control full
4. Undercurrent YES lv Ir 30 Ir 30 to 90 Ir Time before 10 sec 0 to 30 sec tripping Torque limitation YES ILc Ir 200 Ir 150 to 800 Ir Time before 10 sec 0 to 30 sec tripping Cos 9 YES Cos 0 1 1to1 power factor Time before 10 sec 0 to 10 sec tripping Phase rotation YES Disabled Enable or disable direction monitoring 1 These values can b 2 The average rms current is equal t e activated and adjusted from t e front face of the relay when set to Local the average current value of the 3 phases adjust Complementary Parameters Ability to Description Factory setting Adjustment functions preset and enable or range accessible function disable by via serial link enabled at serial link communication factory Voltage threshold Trip voltage 70 Un 68 to 120 Un detection YES Time before 10 000 sec 0 to 100 000 sec tripping Reset voltage 90 Un 68 to 120 Un Time before 10 000 sec 0 to 100 000 sec resetting Short circuit YES Isc 15 x Ir peak detection Automatic YES Time before reset 0 sec 0 to 1000 sec reset Iron 6 C before 100 8n 0 to 100 On reset Motor control YES Control of Reversing Reversing outputs Independent A and B 2 stage Motor YES Cooling method Self cooled 3 Self cooled or cooling for motor external cooled 3 SQUARE D 5 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr tho
5. 91 0 87 0 84 0 79 0 75 3000 9843 0 93 0 91 0 87 0 84 0 80 0 76 0 71 3500 11 484 0 89 0 86 0 83 0 80 0 76 0 72 0 68 4000 13 124 0 83 0 81 0 78 0 75 0 72 0 68 0 64 The values shown in the above table are for guidance only In effect the derating of a motor depends on its size insulation class method of construction self ventilated or forced ventilation enclosure type and varies according to the manufacturer Also in addition to the normal ambient conditions the rated power of a motor is defined by the manufacturer for continuous duty S1 This covers continuous operation of sufficient duration to enable the motor to reach a steady temperature It is this value of rated power that is normally shown on the motor plate There are other standardized types of duty such as temporary duty S2 or intermittent periodic duty type S3 S4 and S5 for which the motor manufacturer defines an operational power appropriate to each and different from the rated power 1 For temperature rise limits of 90 C 194 F and 100 C 212 F the brushes must be selected with the agreement of the motor manufacturer 2 These limit values may be exceeded depending on the quality of the grease used and the applied loads SQUARE D 3 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Functions LT6 POMO05FM The LT6 is designed for the control mo
6. L35 LT6 POMO05FM 5 to 25 LT6 POMO05FM LT6 POM025FM For AC motor full load currents gt 25 A use LT6POMO05FM with customer provided external current transformers with 1 A or 5 A secondary outputs Configuration software and user s manual Description For use Catalog Number with Configuration software kit All ratings of relay LA9 P620 3 1 2 diskette PC minimum requirements 2 meter RS232 cable 386 SX with Windows 3 1 User s manual USA Edition 9110IM9701 Earth fault toroids ground fault current transformers Products marketed under the Merlin Gerin brandname For ordering references please refer to our Merlin Gerin Low voltage distribution 95 96 catalog pages D72 to D74 Sensitivity Internal Type Catalog Number of toroid mm 0 3 to 30A 30 TA30 50437 50 PA50 50438 80 1A80 50439 120 MA120 50440 200 SA200 50441 300 GA300 50442 46 POA 50485 110 GOA 50486 Note Merlin Gerin earth fault toroids may be substituted with GFCT with 1000 1 ratio 12 ____ 1 1 11 SQUARE D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Catalog Numbers PTC thermistor probes
7. communication provides information exchange between the LT6 and PLC or personal computer instantaneous values voltage current per phase frequency power factor thermal state of motor stator and copper windings data log of 5 previous trip incidents causes and remedies maintenance statistics cause of trip statistics operating and alarm states Physical features e Power input terminals from the contactor and power output terminals to the motor 16 pin plug in connector for monitoring protection inputs e 11 pin plug in connector for outputs for contactor coil thermal alarm and fault signalling e 5 pin plug in connector for ground fault current transformer and PTC thermistor probes e Two rotary dials for selection of motor full load current from 20 to 109 of the maximum rated current 1 A 5A or 25 A of the LT6 relay e Rotary dial for selection of Class 5 10 A 10 15 20 25 or 30 thermal overload protection DIP switch for selection of Bus communication address UNI TELWAY or JBUS MODBUS protocol Manual or automatic thermal overload reset Enable local front face or line serial communication link thermal overload settings Sealable transparent cover eliminates tampering with local front cover settings 7 segment display for fault indication e Test button opens N C overload trip contact and closes N O fault signal contact Manual Reset button SUB D Serial interface port for bus commun
8. control device 20 0 R 5S Temperature g 92e C es O OE 82 25 DI _ SQUARE D SSH 9 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Tripping Curves Cold state curves 1 t s 10000 1000 100 Class 30 Class 25 Class 20 10 Class 15 Class 10 Class 5 10 A 1 Wr 1 1 12 1 5 2 3 4 5 6 7 8 1 Tripping time accuracy 8 to 7 2 x Ilr 10 _ SQUARE D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Tripping Curves Hot state curves 1 t s 10000 1000 100 10 Class 30 Class 25 Class 20 Class 15 Class 10 Class 5 10 A 1 Wr 1 1 12 1 5 2 3 4 5 6 7 8 1 Tripping time accuracy 8 to 7 2 x I Ir _ SOQUARE I NANA 1 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Catalog Numbers 3 pole multifunction protection relays Operational current A Catalog Number 0 2 to 1 use terminals L11 L21 L31 LT6 POMO05FM 1 to 5 use terminals L15 L25
9. max gt 5A Max 400 of motor FLA Max 400 of motor FLA Control circuit supply characteristics terminals A1 A2 Rated insulation voltage Ui Conforming to IEC 947 1 Vv 380 VAC Operating voltage Vv 90 to 276 VDC 90 to 276 VDC 50 60 Hz Cabling Plug in connector Solid cable 1 or 2 conductors mm 0 5 to 1 AWG 20 to 18 Stranded cable w out cable end 1 or 2 conductors mm 0 5 to 1 AWG 20 to 18 Stranded cable with cable end 1 conductor mm 0 5 to 1 AWG 20 to 18 2 conductors mm 0 5 to 0 75 AWG 20 Terminal tightening torque N m 0 7 Ib in 6 5 Discrete input characteristics terminals 11 12 13 14 15 16 I7 18 C1 3 C2 see Control circuit supply characteristics for cabling and tightening torques Rated insulation voltage Ui Conforming to IEC 947 1 V 250 VAC Operating voltage V 90 to 15 VDC 90 to 276 VAC 50 60 Hz Current consumption Minimum transient value mA 2 1 changing from 0 state to 1 state in t gt 4 ms Input impedance kQ 56 1 For use with 110 to 690 V 50 60 Hz AC motors only Not approved for use with DC motors or variable speed drives 2 For motor full load currents gt 25 A use LT6POMO05FM with customer provided external current transformers with 1 A or 5 A secondary outputs im This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com SQUARE D LT6 Multifunction Protection Relays Characteristics Discrete outp
10. LA4 KE DC loads Rated voltage V 30 VDC Permissible power w 50 le 0 2 A Ue 30 VDC Ith 2 A for category DC 15 Associated with contactor 300 000 operations for resistive load LP1 K LP2 K with suppressor block LA4 KC External current transformer characteristics Customer provided Must have 1 A or 5 A secondary output Conforming to standards IEC 185 IEC 71 Accuracy class 5P Accuracy limit factor 15 8 SQUARE D D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Characteristics PTC thermistor probes PR Probe characteristicts terminals T1 T2 see Control circuit supply characteristics for cabling and tightening torques Conforming to standards IEC 34 11 mark A Resistance At 25 C Q 3 x 250 in series Rated operational voltage Ue Per probe V 2 5 VDC max Rated insulation voltage Ui kV 2 5 Insulation Reinforced Cable lengths Between probes mm 250 in 10 Between probe and motor m 1 terminal block ft 3 Guaranteed operating zones examples with 3 probes type DA1 TT 250 Q at 25 C connected in series conforming to IEC 34 11 mark A Resistance ohms Trip zone Reset zone 1 3 probes type DA1 TTess 250 Q at 25 C in series 100 NOT nominal operating temperature 20 E Trip control Trip zone device 10 on short circuit probes Reset
11. LS L31 L35 i thn Soni cual 1 For DC control supplies the inputs 11 to 17 must be connected to the positive line 2 Disconnecting means and short circuit protection must comply with National Electrical Code and local codes 3 Local maintained stop must be connected when serial link is used without local stop push button 20 _______ 1 11 SQUARE D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Motor control star delta starting with adjustable time delay Application Diagrams Control via serial link communication Channels A and B set for 2 stage control Maintained stop 3 gvino Control Channel Discrete input C B Channel KM3 7 KM1 Reserved A Common 2 Discrete input E Discrete input D KM3 Stop channels A and B 14 Start channel B I3_ Start channel A _ Fault Tz Local or serial com signalling 98 munication control of A amp B Reset Common 1 Alarm PTC probes Earth fault H1 toroid H2 1L1 L11 L15 3L2 L21 L25 ara 1 For DC control supplies the inputs 11 to 17 must be connected to the positive line 2 Disconnecting means and short circuit protection must comply with National Electrical Code and local codes 3 Local maintained stop must be connected when serial link is used wit
12. LT6 Protection and Intelligence Combined File 9110 CONTENTS Motor Prorectoren ct iceerticehosisuseesteaceissisterepedacs 2 3 Functions Characteristics Tripping Curves Catalog NUMBEIS si sccd ceciccsvastecerastiaveriestencerese CE A a AN EEE 12 13 Mo unting DIMENSIONS vicicicccsscecscicvieeccstenssaverise eabeedesberdertessiwasaversiseesbeevoctevvertesteetes 14 15 Application Diagrams ssrin a ENa E INAS 16 21 GOSSA sere e r a a A dee epeeecs ats 22 SQUARE D GROUPE SCHNEIDER This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Motor Protection Operating conditions There are many possible causes of electric motor failure One of the most common and which is often accidental is the utilization of motors beyond the operating limits defined by the manufacturer or in abnormal ambient conditions A statistical survey covering 9000 incidents of motor failure gave the following results Overloads 1 30 Operating conditions example corrosive atmosphere 19 Phase failure 14 Bearing failure 13 Aging example ambient temperature too high 1 10 Rotor faults 5 Miscellaneous 9 These faults are related to motors with a power rating of 37 kW 50 hp or more 1 An examination of the above results shows that in more than 40 of cases the fault is due to the effe
13. PTC probes Common 2 PTC probes n m NC Control Control supply supply Earth fault H1 1 1 toroid H2 2 2 1L1 1L1 oT 3L2 3L2 L21 L25 3L2 rap 53 5L3 L31 L35 5L3 5L3 L31 L35 l 613 Control via serial link communication UNI TELWAY Jbus Modbus Maintained stop 3 Reserved _ __ Discrete input E Discrete input D Discrete input C Channel B Stop channels A and B Start channel B Start channel A signalling 98 Local or serial communication control of A and B Reset Alarm Common 1 Common 2 PTC probes 11 32 53 ey 1 For DC control supplies inputs 11 to 18 must be connected to the positive line 2 Disconnecting means and short circuit protection must comply with National Electrical Code and local codes 3 Local maintained stop must be connected when serial link is used without local stop push button 16 _ _ _______1_1 1 SQUARE D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Application Diagrams Motor control full voltage non reversing starting Control via serial link communication with signalling earth fault toroid PTC probes state of power components Channels A and B set for reversing or independent control Possible to control the motor via discrete inpu
14. cts of heating Leaving aside the replacement of wearing parts such as bearings slip rings brushes etc the life of an electric motor is linked to that of its insulation Provided that the temperature rise limit is not exceeded the life expectancy of insulating materials is extremely long It is decreased by approximately one half for an excess temperature rise of 10 C 18 F The operating temperature limit TL of an insulating material depends on the type of material and is the sum of the ambient air temperature AT cooling air the temperature rise limit TRL and an additional temperature rise value ATR considered necessary because the measurement of winding resistance variation does not determine the temperature of the hottest part of the motor winding but only gives an average value for temperature rise The diagram below defines the standardized limits for different classes of insulation In all cases the normal ambient cooling air temperature is fixed at 40 C 104 F E 356 180 329 165 311 155 284 140 266 130 257 125 248 120 239 115 212 100 176 80 140 60 104 40 68 20 32 0 E B F Insulation Classes HA 20 SQUARE DIARRA This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Motor Protection The rated power of a motor corresponds to its temperature rise limit for an ambien
15. cument provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Notes SQUARE D AN H _ _ __ _ 23 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com Square D and D are registered trademarks of Square D Company MAGELIS is a trademark of Schneider Electric SA Square D Company P O Box 27446 Raleigh N C 27611 USA 919 266 3671 Catalog 9110CT9702 07 97 1997 Square D All Rights Reserved MODBU is a registered trademark of AEG Schneider Automation Inc This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com
16. ed dissipated pulse withstand Conforming to IEC 1000 4 5 level 3 Resistance to low frequency disturbances supply harmonics Conforming to IEC 947 2 Appendix F Clause F4 1 Resistance to micro breaks Conforming to IEC 1000 4 11 1 Only applicable when power cabling to relay exceeds the following sizes 1 5 mm 16 AWG fitted with cable end or 2 5 mm 14 AWG not fitted with cable end SQUARE D This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Power circuit characteristics terminals L11 L21 L31 L15 L25 L35 271 4T2 6T3 Characteristics Relay type LT6 POMOO5FM LT6 POM025FM Operating voltage range Vv 110 to 600 VAC 110 to 600 VAC Rated insulation voltage Ui Conforming to IEC 947 1 Vv 690 VAC 690 VAC Operating frequency Hz 50 60 1 50 60 1 Rated operational current A 0 2 to 5 2 5 to 25 Cabling Solid cable 1 or 2 conductors mm 1 5to6 AWG 16 to 10 Stranded cable w out cable end 1 or 2 conductors mm 1 5 to6 AWG 16 to 10 Stranded cable with cable end 1 or 2 conductors mm 1 5 to 4 AWG 16 to 12 Terminal tightening torque N m 1 7 Ib in 15 Short circuit protection By circuit breaker Select in accordance with Select in accordance with National Electrical Code National Electrical Code By fuses lt 1A RK5 4 Amp max 1to5A RK5 20 Amp
17. hout local stop push button SQUARE D KM3 KM1 KM2 l g 21 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Glossary 22 Glossary PTC Positive Temperature Coefficient A thermistor resistor with a resistance value which increases with temperature and which increases very rapidly as the nominal operating temperature is reached RDF Residual Differential Fault earth leakage or ground fault rms Root mean square value of a signal l Line current Ir Motor full load current Id Phase imbalance current calculated value IA Residual differential fault current earth leakage current lAr Set value of the residual differential fault current earth leakage current lv Monitoring value of the underload current a multiple of Ir Imax The highest value of the three phase currents Imini The lowest value of the three phase currents lav Average value of the three phase currents Isd Monitoring threshold of the starting current a multiple of Ir lig Torque limitation locked rotor current lec Short circuit current Discrete On Off n Nominal temperature of the iron circuit reached with Ir after an infinite time Or Set temperature for the thermal overload alarm Cos Power factor Earth fault Ground fault Earth fault toroid Un Ground fault sensor zero sequence current transformer Nominal voltage SQUARE D This do
18. ication For use with personal computer running Microsoft Windows 3 1 or Windows 95 with Configuration Software Kit LA9P620 includes RS232 cable and software For use with PLC or MAGELIS XBT terminal with XBT L100 programming software SQUARE D ee This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com 3 Thermal overload reset time is based on calculated cooling time Cooling time of a self cooled motor at standstill is four times longer than the cooling time of an external cooled motor im LT6 Multifunction Protection Relays Functions LT6 configuration table Functions Parameters Protection Parameters Ability to Description Factory settings Adjustment presetand enable or range accessible function disable by via serial link enabled at serial link communication factory Thermal overload Ir rating 20 20 to 109 1 YES Overload class 5 5 10 15 20 25 30 1 Overload alarm 100 0 to 100 Factory installed Overheating via YES 1 KQ resistor Enable or disable PTC thermistors to disable function Phase unbalance YES Id I rms average 2 30 average 10 to 30 and phase failure Start inhibit 0 7 sec 0 to 10 sec Time before 5 sec 0 to 10 sec tripping Earth ground fault YES YES lAr 30 A 0 3 to 30 A Time before 5 sec 0 to 5 sec tripping Prolonged starting YES Isp Ir 150 Ir 100 to 500 Ir time Starting 10 sec 0 to 30 sec time
19. ing channels A and B set for 2 stage control Control via discrete inputs of relay Channel A Reserved Discrete input E KM1 KM2 KM1 KM3 I Discrete input D Discrete input C Stop channels A amp B Channel B Motor gt stop Start channel B Start channel A Local or serial communi cation control of A amp B Fault Reset signalling start Control J supply 1 Motor an Lu Common 1 Common 2 Alarm PTC probes Earth fault toroid L11 L15 3L2 L21 L25 5L3 L31 L35 Control via serial link communication Maintained stop 3 Esel oaa 95 gt Channel km3 KM1 KM3 ial Reserved A 06 ae 18 _ Discrete input E mi KM2 I7_ Discrete input D 16 D te i tC Cc 7 iscrete inpu h l anoal KM1 KM3 15 Stop channels A amp B 02 A 14 Start channel B 13 _ Start channel A A Local or serial communi 97 cation control of A amp B Fault TI Reset signalling 38 C1 Common 1 93 C2 Common 2 Alarm Control A2 94 supply 1 A1 iko 4 KM1 5 PTC probes Earth fault 2 toroid 14 En 1L1 L11 L15 3L2 S 3L2 L21 L25 a o 5L3 S B
20. nitoring and protection of AC motors Product functions not using serial link communication The LT6 protects against thermal overloads by monitoring motor currents up to 25 full load amps with internal current transformers greater than 25 full load amps with external current transformers overheating of motors with embedded PTC thermistor probes phase unbalance and phase loss earth ground fault It provides control of up to two power contactors for non reversing reversing two speed and star delta motor starting fault signalling via an internal output relay and a 7 segment LED display Using serial link communication The LT6 may be set to protect against thermal overloads by monitoring motor currents up to 25 full load amps with internal current transformers greater than 25 full load amps with external current transformers overheating of motors with embedded PTC thermistor probes phase unbalance and phase loss earth ground fault underload prolonged starting time overtorque and locked rotor phase reversal low power factor It provides control of one or two power contactors for non reversing reversing two speed and star delta motor starting fault signalling via an output relay and a 7 segment LED display voltage limitation by monitoring voltage between phases signalling in the event of exceeding the short circuit current thermal alarm Bus
21. rovided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Mounting Dimensions GA300 T c e q4 E WO 21s E i he 11 77 in a Lla 1 14 in 299 mm 29 mm POA GOA 2 Q gp a Dimensions in millimeters Type a b c G POA 72 148 46 57 GOA 78 224 110 76 D S SQUARE D 15 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Application Diagrams Motor control full voltage non reversing starting channels A and B set for reversing or independent control Control from front face of relay KM1 Motor Motor sto E re Sen nh start P als ala T KMI oh Lu Reserved Control via discrete inputs of relay bd LA Sel Dg las 95 KM1 af Channel Reserved A 96 H Discrete input E Discrete input E __ l Discrete input D Discrete input D oF Discrete input C Channel B Motor Discrete input C Channel B ae 02 Stop channels A and B Stop channels A and B __ Start channel B Start channel B Faul 97 Start channel A Start channel A signalling 9g Local or serial communication Local or serial communication control of A and B control of A and B E Alarm 94 Common 1 Common 1 L ik Common 2
22. rp com LT6 Multifunction Protection Relays Characteristics Environment Conforming to standards IEC 947 4 1 IEC 34 11 IEC 755 VDE 0106 VDE 0660 European community directives C marking Meets the essential requirements of Low Voltage equipment LV amp Electromagnetic Compatibility EMC Approvals UL 508 CSA PTB Protective treatment TH Tropical Finish Degree of protection Conforming to IEC 947 1 IP 20 1 Pollution degree Conforming to IEC 664 Shock resistance Conforming to IEC 68 2 27 15 gn 11 milliseconds Vibration resistance Conforming to IEC 68 2 6 2 gn 3 to 100 Hz Ambient air temperature Storage C 35 to 85 around the device 31 to 185 Operation C 20 to 70 F 4 to 158 Flame resistance Conforming to UL 94 vo Maximum operating altitude m 2000 ft 6562 Operating position In relation to normal asad FA vertical mounting plane eon g i EO F Resistance to Conforming to IEC 1000 4 2 level3 kV 8 electrostatic discharge Resistance to Conforming to IEC 1000 4 3 level3 V m 10 electromagnetic interference Resistance to Conforming to IEC 1000 4 4 level 4 kV 2 fast transient currents Resistance to conducted Conforming to IEC 1000 4 6 level 3 radio frequency disturbances Rated undissipated Conforming to IEC 947 1 kV 6 pulse withstand U imp Rat
23. t local position or by serial link communication Discrete input E Maintained stop 3 alols r e F ajaja Channel KM1 1 41 Reserved A 36 a1 gt 7 Discrete input D ror Mi Me Discrete input C Channel B Motor stop o2 Stop channels A and B u O Start channel B Faut au Motor start Start channel A signalling Lu A Local or serial communication a control of A and B Line L Reset Alarm Overload toca C 94 f Q am Common 1 common t PTC probes Control 7 supply Earth fault 1 __ toroid 1L1 om 111 111 115 3L2 o 312 121 125 O O 53 o5 VY e 1 For DC control supplies the inputs 11 to 18 must be connected to the positive line 2 Disconnecting means and short circuit protection must comply with the National Electrical Code and local codes 3 Local maintained stop must be connected when serial link is used without local stop push button D o SQUARE IBI7yY y YyYNTN TT _ 17 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Application Diagrams Motor control full voltage reversing starting Control via front face of relay Channels A and B set for reversing control Control via discrete inputs of relay Channels A and B set for reversing control
24. t temperature of 40 C 104 F The temperature rise limits for the different parts of a machine are given in the following table which is an extract from IEC publication 34 1 Temperature rise limit Insulation class B F H Insulated winding measurement by resistance C F 80 176 100 212 125 257 Commutators and slip rings C F 80 176 90 194 1 100 212 1 Bearings C F 60 140 60 140 2 60 140 2 When a motor is used at an ambient air temperature other than the normal value its temperature rise limit should be modified in order to maintain the same maximum temperature limit The result is that the motor operational power is no longer the same as its rated power Also the altitude of the installation if this is above 1000 m 3281 ft affects the cooling and increases the temperature rise The following table gives the ratio between operational power and rated power according to the operating conditions for a given ambient temperature It corresponds to insulation class B Operational power Rated power in watts Altitude Ambient air temperature AT 30 C 35 C 40 C 45 C 50 C 55 C 60 C m ft 86 F 95 F 104 F 113 F 122 F 131 F 140 F 1000 3281 1 07 1 04 1 00 0 96 0 92 0 87 0 82 1500 4922 1 04 1 01 0 97 0 93 0 89 0 84 0 79 2000 6562 1 01 0 98 0 94 0 90 0 86 0 82 0 77 2500 8203 0 97 0 95 0
25. ut characteristics terminals 95 96 01 02 see Control circuit supply characteristics for cabling and tightening torques Rated insulation voltage Ui Conforming to IEC 947 1 V 380 VAC Type of output Relay 1 N O per channel Associated fuse protection Conforming to IEC 947 5 A 6 A max type RK5 AC loads Rated voltage V 250 VAC Permissible power VA 500 le 0 5 A Ue 250 VAC Ith 5 A cos 0 4 for category AC 15 for 100 000 operations Associated with contactor LC1 K LC2 K LC7 K LC8 K LC1 D09 to D95 LC1 F115 to F150 DC loads Rated voltage V 30 VDC Permissible power VA 50 le 0 5 A Ue 30 VDC Ith 5 A L R lt 25 ms for category DC 15 Associated with contactor for 100 000 operations LP1 K LP2 K LP1 D09 and D12 LP1 D18 to D32 with LA4 DC1U or DC2U LP1 D40 to D80 with LA4 DC3U Signalling output characteristics terminals 97 98 93 94 see Control circuit supply characteristics for cabling and tightening torques Rated insulation voltage Ui Conforming to IEC 947 1 Vv 380 VAC Type of output Relay 1 N O per channel Associated fuse protection Conforming to IEC 947 5 A 4 A max Type RK5 Current limit AtU 5 VDC mA 10 AC loads Rated voltage V 250 VAC Permissible power w 250 le 0 2 A Ue 250 VAC Ith 2 A for category AC 15 300 000 operations for resistive load Associated with contactor LC1 K LC2 K LC7 K LC8 K with suppressor block
26. voltage reversing starting with measurement of cos and voltage Control via serial link communication Channels A and B set for reversing control Maintained stop 3 ialo 95 Ra Channel Km2 KM1 M1 Reserved A 36 ey C2 Common 2 ov 18 Discrete input E Oi I7 _ Discrete input D Channel Lkm KM2 16 _ Discrete input C LB o 15 _ Stop channels A and B 14 Start channel B KH Fauli E T3 Start channel A M an A Local or serial com S gnating gg munication control of A amp B Ti _ Reset 93 C1 Common 1 Alarm 94 Control A2 supply FAT 1 KQ 0 PTC probes HH 230 V T2 E3 NC Earth fault H1 toroid H2 L11 L15 211 3L2 L21 L25 4T2 fe 5L3 L31 L35 Mw sss 613 1 For DC control supplies the inputs 11 to 17 must be connected to the positive line 2 Disconnecting means and short circuit protection must comply with National Electrical Code and local codes 3 Local maintained stop must be connected when serial link is used without local stop push button D o SQUARE D 19 This document provided by Barr Thorp Electric Co Inc 800 473 9123 www barr thorp com LT6 Multifunction Protection Relays Application Diagrams Motor control star delta start
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