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GEK-86038 

RENEWAL  PARTS 

Sufficient  q u antities  of  renewal  pa rts  should  be  kept  in  stock  for  the  prompt 

replacement  of  any  that  a re  wo rn,  broken  o r   d amaged . 

When  o rdering  renewal  pa rts ,   add ress  the  nea rest  sales  office  of  the  General 

Electric  Company.  Specify  the  name  of the  pa rt wanted,  quantity  required ,  and  complete 

nameplate  d ata  of  the  relay . 

20 

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. com 

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Summary of Contents for IRT51 E

Page 1: ...c INSTRUCTIONS TEMPERATURE RELAY TYPES IRT51E IRT51F IRT51G IRT51H GENERAL ELECTRIC GEK 86038C w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 2: ... INS PECTION ACCEPTANCE TESTS PERIODIC CHECKS AND ROUTINE MAINTENANCE 14 V I SUAL I N S P E CT I O N 14 M E C HAN I CAL I N S P E CT I O N AN D ADJUSTM ENTS 15 CONTA CT INS P E CT I ON AN D C L EAN I NG 16 AUX I L I A RY B RUS H E S 16 R H EO STAT CL EAN I N G 16 EL E CT R I CAL T E ST S 16 CALIBRATION PROCEDURE 18 RENEWAL PARTS 20 LIST OF TABLES 21 L I ST OF ILLUSTRATIONS 22 2 w w w E l e c t r i...

Page 3: ...acts are provided by an au xil iary unit operating from the main induction disk unit contacts in a pickup seal in knock do circuit as shown in Figure 8 The rel ay is sel f resetting when the detected temperatu fal l s bel ow a presel ected l evel This reset temperatu re is continuousl y adjustabl e ov a range from soc to 300C bel ow the set o perating temperatu re A manual reset ta rget incl uded ...

Page 4: ...I w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 5: ...heatin g with a ssociated RTO s pl aced in strategic l ocation s in the ta nk Typical external connections for the type IRT51E rel ay are shown in Figure 10 Typical external connections for the type IRT51F rel ay are shown in Figure 11 The types IRT51G and IRT51H rel ays a re temperature protection of rotating equipment these rel ays are shown in Figure 12 intended primaril y for bearing Typical e...

Page 6: ...rature X X X X X X X X X X Operating Circuit 1 20 240 VAC 50 60 Hz X X X X X X X X X X Auxil iary Circuit 1 20 240 VAC 50 60 Hz X X X X X X X 1 25 25 0 VDC X X X X X X X Target X X X Target Seal in 0 2 2 0 amp DC X X X X X X X X X X Reset Features Manual l y X X X X X X X El ectrical l y remote X X X X Sel f X X X X X X X X X X Number of Contacts El ectrical l y Sepa rate N O 1 1 1 1 1 1 1 1 1 2 2...

Page 7: ... I The type IRT relays are suitable for o peration on 5 0 hertz and 60 hertz powe r systems The type IRT relays are designed for use with the following specific type resistance temperatu re detectors a 1 0 ohms at 250C copper RTDs b 100 ohms at ooc planinum RTDs c 1 20 ohm at ooc nickel RTDs Use only the specific RTD for which the particular model IRT was designed The IRT5 1E IRT5 1G and IRT5 1 H ...

Page 8: ...he facto ry with the 1 ink in the 11HIGH pOsition Some models of the IRT51F A relay are rated at 110 220 VAC or D C See Table I The target shows whenever an overtemperature condition is first sensed It must be manually reset The target is not a s eal in type The auxiliary telephone type relay contacts will close and carry 30 amps DC momentarily for tripping duty at control voltages of 2 50 volts D...

Page 9: ...urdens for the operating units of the type IRT relays based u pon the type of RTD for which the unit is designed TABLE 4 OPERATING UNIT BURDENS RTD DESCRIPTION OHMS U MAl tiUAL VOLTS FREQUENCY MILLIAMPS VOLT AMPS WATTS 1 0 25 co pper 1 20 60 63 5 7 62 2 61 240 60 3 1 7 7 61 2 60 1 20 5 0 7 3 1 8 77 2 7 1 240 5 0 36 5 8 76 2 7 1 I 1 00 0 platinum 120 60 65 4 7 80 2 67 240 60 32 8 7 87 2 69 1 20 50 ...

Page 10: ...s 2000 ohms infinite ohms 3700 ohms infinite ohms 4000 ohms infinite ohms 1760 ohms infinite ohms 2000 ohms infinite ohms 3520 ohms infinite ohms 4000 ohms infinite ohms CON STRUCTION The relay case is suitabl e for either surface or semi fl ush panel mounting Hardware is provided with the rel ay for either mounting method The cover attaches to the case with four cover screws which have provisions...

Page 11: ...he relay case to avoid damaging the reset mechanism RECEIVING HANDL ING AND STORAGE These relays when not included as part of a control panel are shipped in cartons designed to protect them against damage Immediately upon receipt of a relay examine it for any damage sustained in transit If damage due to rough handling is evident file a damage claim at once with the trans portation company and prom...

Page 12: ...o be used for different voltage sou rces See Table 1 fo r the relay voltage ratings 1 20 volt AC Operation Coil H1 H2 must be placed in parallel with coil H3 H4 To make the parallel connection connect lead H1 to lead H3 and lead H2 to lead H4 Polarity is important 240 volt AC Ope ration Coil H1 H2 must be placed in series with coil H3 H4 To make this connection connect lead H2 to H3 Polarity is im...

Page 13: ...ontact is desired the green lead should be connected to terminal 1 0 There is a sho rting bar between terminals 9 and 1 0 This sho rting bar is u sed to protect current transfo rmer circuits from being o pened whenever the relay connection plug is removed This shorting bar may be removed if it is not u sed Some models of IRT5 1F A relays are rated at 1 1 0 220 VAC or DC See Table 1 IRT5 1G and IRT...

Page 14: ... w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 15: ...al interlock arrangement that will maintain the last energized position of the contacts This position will be maintained even if power is removed from the relay This s pecial feature must be considered when first placing the relay into service or when returning a relay back into service after completing maintenance on the relay To avoid tripping on start up for reasons other than overtemperatu re ...

Page 16: ...ical imperfections If any of these are found they should be corrected immediately INSPECTION ACCEPTANCE TESTS PERIODIC CHECKS AND ROUTINE MAINTENANCE Immediately upon receipt of the relay it should be inspected and tested to make sure that no damage has been sustained in shipment and that the relay calibrations have not been disturbed Also in view of the vital role of protective relays in the oper...

Page 17: ... the shaft has 1 64 to 1 32 inch end play Both set screws must be secu rely tightened after the adjustment is complete 3 The contacts should have appro ximately l 32 inch wipe That is the stationary r contact tip should be deflected about 1 32 inch when the disk and moving _ contact complete their travel The contact wipe on the left stationary contact is adjusted by turning the screws in the conta...

Page 18: ...h It is especially important on current circuits and other circuits with shorting bars that the auxiliary brush be bent high enough to engage the connecting plug or test plug before the main brushes do This will prevent the current transformer secondary circuits from being opened or the current circuits from being interrupted RHEOSTAT CLEANING Although the sliding contact in the temperature select...

Page 19: ... is the resistance to be used as the simulated RTD load Measure the resistance of the resistor very carefully since a small difference in resistance values can mean several degrees difference between what is desired and what is actually obtained During the 30 minute warm up period set a temperature on the temperature selection dial just over the temperature associated with the simulated RTD load T...

Page 20: ...ect resisto r A from Table g across terminals 4 and 5 Short terminals 5 and 6 to gether 5 Turn the temperature selection dial to the 16QOC setting 6 Apply rated voltage and frequency to the o perating circuit 7 Adjust R1 until the moving contact just makes the left IRT stationary contact IRTL Tighten the slide band in this position If the Rl sliding tap does not permit this setting precisely adjus...

Page 21: ... point mark the location of the temperature selection dial Do not disturb this dial setting until the reset temperature calibration is complete Next determine the reset temperature with respect to the overtemperature setting For example the overtemperature setting that is required for a particular application is 120oc and the desired reset temperature is uooc The temperature difference between the...

Page 22: ...e wo rn broken o r damaged When o rdering renewal pa rts add ress the nea rest sales office of the General Electric Company Specify the name of the pa rt wanted quantity required and complete nameplate data of the relay 20 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 23: ... Interrupting Ratings Operating Unit Burdens 8 Burden for IRT51E Target Seal in Unit 9 Burden for IRT51F Auxiliary Circuit 9 Burden for IRT51G and IRT51H Target 9 Seal in Unit and Auxiliary Circuit Lead Wire Resistance 14 Calibration Resistor Values 19 21 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 24: ...1E Relay External Connections Diagram Type IRT51F Relay External Connections Diagram Types IRT51G and IRT51H Relays Resistance of 10 ohm Copper RTD versus Temperature When Used With the IRT Relay Resistance of 100 ohm Platinum RTD versus Temperature When Used With the IRT Relay Resistance of 120 ohm Nickel RTD versus Temperature When Used With the IRT Relay Fahrenheit to Centigrade Conversion Outl...

Page 25: ...PER T PIVOT INDUCTION DISK SPRING Figure 1 050283 1 Type IRT51 G and IRT51 H Relay Front View Figure l 050283 1 Type IRTSIG and IRT51H Relay Front View 23 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 26: ...re 2 050283 2 Type IRT51 G and IRT51 H Relay Right Srde Vrew Figure 2 050283 2 Type IRT51G and IRT51H Relay Right Side View 24 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 27: ...TCHING RELAY __ GEK 86038 Figure 3 050283 3 Type IRTSJG and IRTSJH Relay left Side and Back View 25 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 28: ... WIRE 1T 36 LONG u AWG 22 PIPE SIZE _z_HEX 8 1 1 P T 77 L JJ PI PE SIZE BRASS REDUCING BUSHING PIPE FITTING Figure 4 0285A6731 0 R esistance Temperature Detector Assembly 26 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 29: ... GEK 86038 ARMATURE OPERATING ARM RESIDUAl SCREW LOCKNUT POLE PIECE Figure 5 8012106 Telephone Relay 27 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 30: ...G BAR__ NOTE AFTER ENGAGING AUXILIARY BRUSH CONNECTING PLUG TRAVELS Y4 INCH BEFORE ENGAGING THE MAIN BRUSH ON THE TERMINAL BLOCK Figure 6 8025039 Drawout Case Contact Assembly 28 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 31: ...GER 5 GEK 86038 I 7 HI H2 H3 H4 8 IRT UPPER COILS Figure 7 0285A6213 0 Internal Connections Diagram for the Type IRT51E Relay 29 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 32: ...RELAY T TARGET HI H2 H3 H4 RT UPPER COILS GREEN LEAD A REMOVE IF NOT USED 6 fl 7 10 Figure 8 0285A6214 2 Internal Connections Diagram for the Type IRT51F Relay 30 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 33: ... R M 5 Mbll iJAL RE5ET 5 1 ITCH Q P AUX I LI A RY OPERATI NG U N IT RE AUX I LI A RY RESET U N IT i TARGET SE A l I N U N I T F i gure 9 028 5A6215 I Inte rnal Connections Diagram fo r the Type IRT5 1G and IRT5 1H Rel ays 3 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 34: ... P r I r CLUDED D E S C R I P T I O N rw E L U UJ T 4 9 IR T3It I rJ O U C T I O J H M P REL A Y tRTt L E F T c o rn H O T T S i T A R G E T S E A L I N J J I T 2 C R u T fl R A K t R a A U X C O N T A C T T C T R J P C O I L 2 8 R E S I S T TEMP D E T E C T O R F i gure 10 018488779 1 Sh 1 External Connect i ons Di agram for t he Type IRT51 E Rel ay 32 w w w E l e c t r i c a l P a r t M a n u a ...

Page 35: ... I w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 36: ...P O S I T I O N F O R 2 4 0 V 5 0 6 0 H Z OR 2 5 0 V D C Dt V 10 9 2 1 C R 1 1_ _ _ TR l c P d r U S_ _ _ 91 9 GREEN LEAD A 19 GREEN LEAD TO STUD 10 A REMOVE SHORTING BAR BETWEEN STUDS 9 AND 10 _E_ s tL T FE I NCL U D E D DES CR PTIO I ELEMENT I R T F I ND U C T I O N TE M P R E L 4 IRTR R IGHT CONT lCOI Dl I RT Lf FT CONT HOT A A JX RY dNI T ARGF 1 C I R CU I T llR AKE R lL AUX C O N 1 C T T C T ...

Page 37: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 38: ...T P O W ER S U P P L Y T O S T UDS 1 3 F O R F O R 240V 50 60 HZ O R 250V D C 2 IJR 3 DEV JO 4 9 28 j2 T YPE I JCLUDED DESCR IPT imJ EU J E JT RT51G I N D U C T I O N T E M P R E L A Y O il H r fTo R GHT CONT 1COil2l IRT LFFT CO JT CHOT l OF AUX OPER U J T F UX RESt Jr T r s I ANUAI R ES F T SWI TCH T r T A R G F T S F A I _ I J U N I T f ESIS T MP Dl fE OR CIR CUlT llR _ AKER T C TRIP COIL _ t U ...

Page 39: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 40: ... I I I I I I I I I I I I I I I I I I I I I I I I I v I I I I J I I I I I I I I I I I I I I I v I I I I I I I I I I t I I I I I I I I I I I I I I I I I I I I I I I I I J I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I _l I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I l I I I I I I I I ...

Page 41: ... w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 42: ...J I I I _l Y l I I j I I I I I I I I I I I I I I I I I I I j_ I I I I 1 I I I I l T I I I I I I I y I I I I I I I L _l I I I I I I I I I I I I I I I I I I v I I I I I I I I I I v I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I J __ I I I I I I I I I I I I I I I I I I I I l j_ I I I I I I I 1 _1_ J I I I I I I l I I I I I I I I I I I I I __ I J I I ...

Page 43: ... w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 44: ...I I I I I I v I I I I I I I I I I I J I I l I V I I I I I I I I I I I I I Vi I I I I I I I I I I I _I J I I I I I I I I I I I I I I I I I I I I I I I 1 _I I I I I I 11 I LA I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I _I I I I I I I I I I I I _j_ I I I I I I I I I I I I I I I I I I I I I I I t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I ...

Page 45: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 46: ...I I 1 I i i I J I I I 1 I i I I I 1 I l I ll I j 1 1 1 I I I I 17 I I I I I ll I I II I I ll I v I I I i I I I I I I I I i I I I I I I I I J II II I I l I I i I I I I I I 0 40 80 1 20 1 60 2 0 0 24 0 T E M P E R A T U RE I N D E G R E E S C E N T I G R A D E F i gure 16 0285A6732 Sh 4 1 Fahrenhe i t t o Cent i grade Conversi on Revi sed si nce l ast i ssue 38 l 1 1 f hr I I I I I I I I 1 r I I I I...

Page 47: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 48: ...8 8 1 223M I 2 M 2 1 8 J 5MM I 2 1 8 r 5MM 1 1 I I FOR 5 687 1 4 4 M M PANEL DR I L L I NG SEM I F L U S H MOUNT I NG FRONT V I EW PANELJ i l 7 1 8 1 8MM 3 4 DR I LL 1 0 H O L E S 1 9MM PANEL DR I LL I NG F O R SURFACE MOUN T I NG FRONT V I EW 5 1 6 1 8 S T U D TYP I CAL D I M 3 0 I 7 6MM _ I NCHE S MM V I EW SHOW I NG A S SEMBLY OF HARDWARE FOR SURFACE M T G ON S TE E L PA NE L S F i gure 17 0062...

Page 49: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 50: ... 5 1 23MM 1 75 I 46MM f PANEL DR I L L I NG 1 33MM 314 D R I L L 2 0 H O L E S 1 9MM PANEL DR I LL I NG FOR SURFACE MOUNT I NG FRONT V I EW FOR S E M I FLUSH MOUNT I NG FRONT V I E 1 C A TYP I CAL D I M I NCHES MM 3 0 76MM 5 1 6 1 8 S TUD V I EW SHOW I NG ASSEMBLY OF HARDWARE FOR SURFACE MTG ON S T E EL PANE L S F i gure 18 006209272 6 Out l i ne and Pane l Dri l l i ng for Type IRT51G and IRT51H ...

Page 51: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

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