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41-133S

27

Directional Overcurrent Ground Relays
Types IRP, IRC and IRD

*Sub 2
9654A56

Figure 12: Internal Schematic of the Type IRD Relay, with Field Modified Reversed “D” Contacts, in the Type FT-41 Case

*

Denotes change since previous issue

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Summary of Contents for IRC

Page 1: ...nsformer and two indicating con tactor switches ICS I and ICS T The principle component parts of the relays and their locations are shown in Figures 1 through 6 starting on page 19 2 1 TIME OVERCURRENT UNIT CO The electromagnets for the types IR 5 IR 6 IR 7 IR 8 and IR 9 relays have a main tapped coil located on the center leg of an E type laminated structure that produces a flux which divides and...

Page 2: ...the core of the solenoid As the plunger travels upward the disc bridges the silver stationary contacts The TR 1 switch is a telephone relay A tapped resis tor is used to enable one to use the auxiliary switch on a 24 48 125 or 250 volt dc system connected per Figure 26 page 40 The operation of the CS 1 or TR 1 switch is controlled by the directional unit D which in turn directionally controls the ...

Page 3: ...ws the instantaneous overcurrent unit closing time The voltage polarized curve B begins to deviate from curve A for less than 5 volts Both the directional unit and the overcurrent unit must operate before the trip circuit can be completed Hence the unit which takes the longer time to oper ate determines when the breaker will be tripped The overcurrent unit contacts cannot operate until the back co...

Page 4: ...cuit breaker The indicating contactor switch has two taps that pro vide a pickup setting of 0 2 or 2 amperes To change taps requires connecting the lead located in front of the tap block to the desired setting by means of a screw connection 4 2 CONTACTS The moving contact assembly has been factory adjusted for low contact bounce performance and should not be changed The set screw in each stationar...

Page 5: ...h which coordination is to be effected The connector screws on the tap plate above the time dial makes connections to various turns on the operating coil By placing this screw in the various tap plate holes the relay will just close its contacts at the corresponding current 4 5 6 7 8 10 12 amperes or as marked on the tap plate Since the tap block connector screw carries operating current be sure t...

Page 6: ... then mechanically close in a direction opposite to that of the instanta neous unit contact Electrical characteristics and external connections to the relay would not be affected Field modifications can be made per the following procedures 1 Reverse the leads on the stationary contacts of the directional unit For the IRD reverse the leads on both directional units 2 Reverse the leads to switch jaw...

Page 7: ...e operating time of the relay The operating times should equal those of Table 3 plus or minus 5 percent 7 1 4 Indicating Contactor Switches ICS I and ICS T a Close the contacts of the CO and pass sufficient dc current through the trip circuit to close the contact of ICS T This value of current should not be greater than the particular ICS T tap set ting being used The operation indicator target sh...

Page 8: ...ng should then be securely locked in position with the lock nut b Contact gap adjustment for the directional unit is made with the moving contact in the reset posi tion i e against the right side of the bridge Advance the right hand stationary contact until the contacts just close Then advance the sta tionary contact an additional one half turn Now move in the left hand stationary contact until it...

Page 9: ...nsion so that the moving contact will leave the backstop at tap value current 1 0 and will return to the backstop at tap value current 1 0 Time Curve Calibration Install the permanent magnet Apply the indicated current per Table 3 page 11 for permanent magnet adjustment e g IRP 8 2 times tap value and measure the operating time Adjust the permanent magnet keeper until the operating time correspond...

Page 10: ...djustment Connect lead A to proper terminal per Figure 26 page 40 Block directional unit D contacts close and energize trip circuit with rated voltage Contacts of auxiliary switch CS 1 or TR 1 should make as indicated by a neon lamp in the contact circuit 8 0 RENEWAL PARTS Repair work can be done most satisfactorily at the factory However interchangeable parts can be fur nished to the customers wh...

Page 11: ...wed out until Spurious Torque is in contact closing direction Then the plug is screwed in until Spurious Torque is reversed reversed Short circuit the voltage polarizing at the relay terminals before making the above adjustment TABLE 2 DIRECTIONAL UNIT CALIBRATION PERMANENT MAGNET ADJUSTMENT ELECTROMAGNET PLUGS TIME OVERCURRENT UNIT TYPE TIME DIAL POSITION CURRENT MULTIPLES OF TAP VALUE OPERATING ...

Page 12: ... 30 36 32 30 28 26 24 49 43 38 35 33 29 51 45 40 38 34 30 28 21 16 15 12 11 31 24 20 18 16 15 24 13 8 5 6 0 4 6 2 9 9 0 5 0 3 0 2 1 1 5 0 93 6 5 3 3 2 1 1 4 1 1 0 7 2 4 1 2 0 7 0 6 0 37 0 24 0 43 0 27 0 20 0 15 0 11 0 08 0 40 0 25 0 18 0 14 0 10 0 07 46 37 34 32 31 28 36 32 29 27 26 24 48 42 37 35 33 29 51 45 40 38 34 31 28 21 17 15 13 12 31 24 20 18 16 15 Thermal capacities for short times other ...

Page 13: ...106 0 121 2 14 2 240 0 272 0 11 5 182 0 216 0 26 0 420 0 472 0 IRC IRP IRD Degrees current lags voltages at tap value current Thermal capacities for short times other than one second may be calculated on the basis of time being inversely proportional to the square of the current φ ENERGY REQUIREMENTS 60 HERTZ DIRECTIONAL UNIT POLARIZING CIRCUIT BURDEN RELAY TYPE RATING VOLT AMPERES POWER FACTOR AN...

Page 14: ...28 110 110 110 110 110 110 110 230 230 230 230 230 230 230 58 57 53 50 40 36 29 59 55 51 47 45 41 37 65 50 47 46 43 37 34 4 8 4 9 5 0 5 3 6 2 7 2 7 9 5 04 5 13 5 37 5 53 5 72 5 90 6 54 4 92 5 20 5 34 5 53 5 86 6 6 7 00 39 6 39 8 42 7 45 4 54 4 65 4 73 6 38 7 39 8 42 2 44 0 46 0 50 3 54 9 39 1 42 0 44 1 45 8 49 9 55 5 62 3 256 270 308 348 435 580 700 262 280 312 329 360 420 474 268 305 330 364 400 ...

Page 15: ...67 66 62 60 58 67 66 64 63 62 59 57 65 63 61 59 56 53 47 3 92 3 96 3 96 4 07 4 19 4 30 4 37 3 88 3 90 3 93 4 09 4 12 4 20 4 38 4 00 4 15 4 32 4 35 4 40 4 60 4 92 20 6 20 7 21 0 21 4 23 2 24 9 26 2 21 0 21 6 22 1 23 1 23 5 24 8 26 5 22 4 23 7 25 3 26 4 27 8 30 1 35 6 103 106 114 122 147 168 180 110 118 126 136 144 162 183 126 143 162 183 204 247 288 270 288 325 360 462 548 630 308 342 381 417 448 5...

Page 16: ...58 56 66 63 63 62 61 59 58 64 61 60 58 55 51 46 3 88 3 93 3 93 4 00 4 08 4 24 4 38 4 06 4 07 4 14 4 34 4 34 4 40 4 62 4 24 4 30 4 62 4 69 4 80 5 20 5 40 20 7 20 9 21 1 21 6 22 9 24 8 25 9 21 3 21 8 22 5 23 4 23 8 23 2 27 0 22 8 24 2 25 9 27 3 29 8 33 0 37 5 103 107 114 122 148 174 185 111 120 129 141 149 163 183 129 149 168 187 211 260 308 278 288 320 356 459 552 640 306 342 366 413 448 530 624 39...

Page 17: ...69 67 62 57 53 70 66 64 62 60 58 56 68 63 60 57 54 48 45 2 38 2 38 2 40 2 42 2 51 2 65 2 74 2 38 2 40 2 42 2 48 2 53 2 64 2 75 2 38 2 46 2 54 2 62 2 73 3 00 3 46 21 0 21 0 21 1 21 2 22 0 23 5 24 8 21 0 21 1 21 5 22 0 22 7 24 0 25 2 21 3 21 8 22 6 23 6 24 8 27 8 31 4 132 134 142 150 170 200 228 136 142 149 157 164 180 198 146 158 172 190 207 248 292 350 365 400 440 530 675 800 360 395 430 470 500 5...

Page 18: ...9 1 02 1 10 1 23 1 32 1 8 6 54 6 80 7 46 8 30 10 04 11 95 13 95 6 30 7 00 7 74 8 20 9 12 9 80 11 34 7 08 8 00 9 18 10 00 11 1 14 9 16 3 71 8 75 0 84 0 93 1 115 5 136 3 160 0 74 0 78 5 84 0 89 0 102 0 109 0 129 0 78 4 90 0 101 4 110 0 124 8 131 6 180 0 250 267 298 30 411 502 610 264 285 309 340 372 430 504 296 340 378 454 480 600 720 0 5 2 5 2 6 4 12 Range Factor Tap Value 3 Times 10 Times 20 Times...

Page 19: ...t Unit and Saturating Transformer 2 Current Polarized Directional Unit 3 Voltage Polarized Directional Unit 4 Time Overcurrent Unit 5 Indicating Contactor Switches 6 Auxiliary Switch Figure 2 Type IRD Relay without Case Rear View 1 Varistor 2 Saturating Transformer 3 E type Electromagnet Sub 1 9664A15 Photo Sub 1 9664A16 Photo 6 1 2 3 4 5 1 2 3 ...

Page 20: ...oto 1 Stationary Contacts 2 Stationary Contact Pressure Spring 3 Magnetic Adjusting Plugs 4 Upper Bearing Screw 5 Moving Contact 6 Spring Adjuster Clamp 7 Current Bias Vane Photo 1 Tap Block 2 Time Dial 3 Control Spring Assembly 4 Disc 5 Stationary Contact Assembly 6 Magnetic Plugs 7 Permanent Magnet 4 7 2 1 1 5 3 6 1 6 2 5 3 4 7 ...

Page 21: ...d Relays Types IRP IRC and IRD Figure 5 Instantaneous Overcurrent Unit Figure 6 Indicating contactor Switch ICS 1 Instantaneous Overcurrent Unit 2 Stationary Contact 3 Moving Contact 4 Saturating Transformer 5 Tap Block Photo Photo 2 3 1 5 4 ...

Page 22: ...41 133S 22 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 7 internal Schematic of the Type IRP Relay in the Type FT 31 Case Sub 9 184A033 Denotes change since previous issue ...

Page 23: ...41 133S 23 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 8 Internal Schematic of the Type IRC Relay in the Type FT 31 Case Sub 8 184A034 Denotes change since previous issue ...

Page 24: ...41 133S 24 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 9 Internal Schematic of the Type IRD Relay in the Type FT 41 Case Sub 11 184A020 Denotes change since previous issue ...

Page 25: ...tional Overcurrent Ground Relays Types IRP IRC and IRD Sub 2 9654A57 Figure 10 Internal Schematic of the Type IRP Relay with Field Modified Reversed D Contacts in the Type FT 31 Case Denotes change since previous issue ...

Page 26: ...tional Overcurrent Ground Relays Types IRP IRC and IRD Figure 11 Internal Schematic of the Type IRC Relay with Field Modified Reversed D Contacts in the Type FT 31 Case Denotes change since previous issue Sub 2 9654A58 ...

Page 27: ...tional Overcurrent Ground Relays Types IRP IRC and IRD Sub 2 9654A56 Figure 12 Internal Schematic of the Type IRD Relay with Field Modified Reversed D Contacts in the Type FT 41 Case Denotes change since previous issue ...

Page 28: ...41 133S 28 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 5 289B506 Figure 13 External Schematic of the IRP Relay for Ground Fault Protection ...

Page 29: ...41 133S 29 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 14 External Schematic of the IRC Relay for Ground Fault Protection Sub 4 289B507 ...

Page 30: ...41 133S 30 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 15 External Schematic of the IRD Relay for Ground Fault Protection Sub 4 289B508 ...

Page 31: ... 133S 31 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 1 619584 Figure 16 Typical Time Curves of the Time Overcurrent Unit of the Short Time 2 Relays Denotes change since previous issue ...

Page 32: ...41 133S 32 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 2 418245 Figure 17 Typical Time Curves of the Time Overcurrent Unit of the Long Time 5 Relays ...

Page 33: ...133S 33 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 18 Typical Time Curve of the Time Overcurrent Unit of the Definite Time 6 Relays Sub 3 418246 Denotes change since previous issue ...

Page 34: ...133S 34 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 3 418247 Figure 19 Typical Time Curve of the Time Overcurrent Unit of the Definite Time 7 Relays Denotes change since previous issue ...

Page 35: ...41 133S 35 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 3 418248 Figure 20 Typical Time Curve of the Time Overcurrent Unit of the Definite Time 8 Relays ...

Page 36: ...41 133S 36 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 2 418249 Figure 21 Typical Time Curve of the Time Overcurrent Unit of the Definite Time 9 Relays ...

Page 37: ...41 133S 37 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 2 288B655 Figure 22 Typical Time Curve of the Time Overcurrent Unit of the Definite Time 11 Relays ...

Page 38: ...ent Ground Relays Types IRP IRC and IRD Sub 2 538109 Figure 23 Typical Operating Times For The Directional Unit Figure 24 Typical Operating Times For the Instantaneous Overcurrent Unit Denotes change since previous issue Sub 7 538108 ...

Page 39: ...41 133S 39 Directional Overcurrent Ground Relays Types IRP IRC and IRD Sub 5 184A118 Figure 25 Diagram Of Test Connections Of The Time Overcurrent Unit ...

Page 40: ...41 133S 40 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 26 Selection of Proper Voltage Tap for Auxiliary Switch Operation Sub 4 184A316 Sub 1 1518B95 Figure 27 Test Connections ...

Page 41: ...41 133S 41 Directional Overcurrent Ground Relays Types IRP IRC and IRD NOTES ...

Page 42: ...41 133S 42 Directional Overcurrent Ground Relays Types IRP IRC and IRD NOTES ...

Page 43: ...41 133S 43 Directional Overcurrent Ground Relays Types IRP IRC and IRD Figure 28 Outline and Drilling Plan for the IRP and IRC in the Type FT 31 Case Sub 17 57D7902 Sub 17 57D7902 ...

Page 44: ...e Drive Coral Springs Florida 33065 TEL 954 752 6700 FAX 954 345 5329 Directional Overcurrent Ground Relays Types IRP IRC and IRD visit our website at www abbus com papd Sub 18 57D7904 Figure 29 Outline and Drilling Plan for the IRD Relay i n the Type FT41 Case ...

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