Current transformers TI current transformers 0 056853NMD-2 056854NMD-2 16503. Function Current transformers with a ratio of Ip/5, for measurement devices (ammeters, kilowatt hour meters), load shedders, control relays, etc. Common technical data b Secondary current: 5 A. b Max. voltage rating Ue: 720 V. b Frequency: 50 60 Hz. b Safety factor: v 40 to 4000 A: fs y 5 v 5000 to 6000 A: fs y 10. b IP20. b Ambient installation temperature: v standard range: - 5 C to + 55 C, humidity < 95 % v tropicalised range: - 25 C to + 60 C, humidity > 95 %. b Reference standards: IEC 44-1, NFC42502, VDE 0414, BS 7626 and IEC 38-1. b Weight: 056852NMD-2 16512. Weight (g) 16500 16506 and 16451 16456 200 16509 16515 and 16459 16465 270 16518 16521 and 16468 16471 430 16523 16524 and 16473 16474 500 16526 16535 and 16476 16483 600 16537 16538 700 16540 16544 1500 16545 16547 1500 16548 16549 5000 Specific technical data PB100316 16542. 16503 + 16550. TI with let-through primary: b Secondary connection using terminals for lug, using tunnel terminals or using screws (depending on cat. no.). b Delivered with: fixing on a symmetrical rail fixing on a plate Insulated binding screw Sealable cover 16500...16506 and b b b 16451...16456 16509...16512 and b b b Optional 16459...16462 16518...16521 and b b b Optional 16468...16471 16523...16524 and b b b 16473...16474 16526...16535 and b b 16476...16483 16537...16538 b b 16540...16544 b b 16545...16547 b b 16548...16549 b b 056855MD-2 Sealable cover. b Maximum dimensions for primary circuit cable inlets: Opening Cable Ø 16500 16506 and 16451 16456 20 x 5 mm 21 16509 16512 and 16459 16462 30 x 10 mm 22 16518 16521 and 16468 16471 40 x 10 mm 35 16523 16524 and 16473 16474 64 x 11 mm and 51 x 31 mm 16526 16535 and 16476 16483 65 x 32 mm 32 16537 16538 34 x 84 mm 16540 16544 38 x 127 mm 16545 16547 52 x 127 mm 16548 16549 55 x 165 mm
Current transformers TI current transformers (cont.) 0 TI with connection of primary by screw and nut: b Secondary connection using terminals for lug or tunnel terminals (depending on cat. no.). b Cylinder Ø 8.5 mm. b Cylinder Ø 12.5 mm. b Delivered with: (1) Rigid flat. (2) Rigid vertical. (3) < 80 mm rigid. (4) 80 mm rigid. (5) 100 mm rigid. (6) 100 mm rigid triple. fixing on a symmetrical rail fixing on a plate Sealable cover 16500 16506 and 16451 16456 b b b 16511 16515 and 16461 16465 b b Optional TI with let-through primary Ratio Insulated Prisma cable vertical Insulated flexible Linergy vertical Rigid Cat. no. TI standard Cat. no. TI tropical 40/5 b 16500 50/5 b 16501 16451 75/5 b 16502 16452 100/5 b 16503 16453 125/5 b b 16504 16454 150/5 b b b 16505 16455 b 16509 16459 200/5 b b b 16506 16456 b 16510 16460 b 16526 16476 250/5 b b b 16511 16461 b 16518 16468 b 16527 16477 300/5 b 16512 16462 b b b 16519 16469 b 16528 16478 400/5 b b b b 16520 16470 b 16529 16479 500/5 b b 16521 16471 b 16523 16473 b 16530 16480 600/5 b b (1) 16524 16474 b b b (2) 16531 16481 800/5 b b b 16532 16482 1000/5 b b b 16533 16483 1250/5 b b b (3) 16534 b (4) 16537 b (5) 16540 1500/5 b (3) 16535 b (4) 16538 b (5) 16541 2000/5 b 16542 2500/5 b 16543 b (6) 16545 3000/5 b 16544 b (6) 16546 4000/5 b 16547 5000/5 b 16548 6000/5 b 16549
Current transformers TI current transformers (cont.) 0 TI with connection of primary by screw and nut Ratio Cat. no. TI standard Cat. no. TI tropical Cat. no. cylinder 40/5 16500 + 16550 50/5 16501 or 16451 + 16550 75/5 16502 or 16452 + 16550 100/5 16503 or 16453 + 16550 125/5 16504 or 16454 + 16550 150/5 16505 or 16455 + 16550 200/5 16506 or 16456 + 16550 250/5 16511 or 16461 + 16551 300/5 16512 or 16462 + 16551 400/5 16513 or 16463 + 16551 500/5 16514 or 16464 + 16551 600/5 16515 or 16465 + 16551 Accessories Type Cat. no. Cylinder Ø 8.5 mm 16550 Ø 12.5 mm 16551 Sealable cover for cat. nos. 16509 to 16515 and 16459 to 16465 16552 for cat. nos. 16518 to 16521 and 16468 to 16471 16553 Connection E56648 S1 S2 K L P1 K E56651 K P2 TI with let-through primary. E56646 E56647 S1 S2 K L P1 K S1 S2 K L P1 K TI with connection of primary by screw and nut.
Current transformers TI current transformers 0 Choice and accuracy class Choosing a current transformer 2 criteria exist for choosing a TI: b the Ip/5 A ratio b the type of installation. The Ip/5 A ratio It is recommended that a ratio immediately above the measured current (In) be chosen. Example: In = 1103 A; ratio chosen: 1250/5. Type of installation Which TI model to choose depends on the type of installation: b insulated cables b Prisma vertical b insulated flexible b Linergy vertical b rigid. Important warning Never open the secondary circuit of a current transformer while the primary circuit is energized. Before any kind of maintenance service on the secondary circuit, the secondary terminals on the tranformer must be short-circuited. Determining the accuracy class of a TI The accuracy class is a function of the transformer's power and the consumption of the measurement system. The latter takes device and cable consumption into account. For a given accuracy class, consumption of the measurement system must not exceed the power on the TI transformer. Copper cable cross-section in mm 2 Power in VA per doubled meter at 20 C 1 1 1.5 0.685 2.5 0.41 4 0.254 6 0.169 10 0.0975 For each temperation variation of 10 C, the power absorbed by the cables rises by 4 %. Merlin Gerin device Consumption in VA Ammeter 72 x 72 / 96 x 96 1.1 Analog ammeter 1.1 Ammeter Digipact IM100 0.5 Digital ammeter 0.3 PM500, PM700, PM800, CM3000, CM4000 0.15 CE tri 1.2 CEr tri 1.2 ME4zrt 0.05 PM9 0.55
Current transformers TI current transformers 0 Choice and accuracy class (cont.) Example: consumption of a measurement system at 20 C PM9 0.55 VA Digital ammeter + 0.30 VA 4 meters of doubled wire 2.5 mm 2 + 1.64 VA Measurement system consumption = 2.19 VA The accuracy class of the TI is deduced: b class 3 for a TI with a ratio of 75/5 b class 1 for a TI with a ratio of 100/5 b class 0.5 for a TI with a ratio of 125/5. Ip/5 Cat. no. Power (VA) accuracy class standard TI tropical TI 0.5 1 3 40 A 16500 16500 1 50 A 16501 16451 1.25 1.5 75 A 16502 16452 1.5 2.5 100 A 16503 16453 2 2.5 3.5 125 A 16504 16454 2.5 3.5 4 150 A 16505 16455 3 4 5 16509 16459 1.5 5.5 6.5 200 A 16506 16456 4 5.5 6 16510 16460 4 7 8.5 16526 16476 2 5 250 A 16511 16461 6 9 11 16518 16468 2.5 5 8 16527 16477 1 4 6 300 A 16512 16462 7.5 11 13.5 16519 16469 4 8 12 16528 16478 1.5 6 7 400 A 16513 16463 10.5 15 18 16520 16470 8 12 15 16529 16479 4 8 10 500 A 16514 16464 12 18 22 16521 16471 10 12 15 16523 16473 2 4 6 16530 16480 8 10 12 600 A 16515 16465 14.5 21.5 26 16524 16474 4 6 8 16531 16481 8 12 15 800 A 16532 16482 12 15 20 1000 A 16533 16483 15 20 25 1250 A 16534 16534 15 20 25 16537 16537 12 15 20 16540 16540 8 12 1500 A 16535 16535 20 25 30 16538 16538 15 20 25 16541 16541 10 15 2000 A 16542 16542 15 20 2500 A 16543 16543 20 25 16545 16545 30 50 60 3000 A 16544 16544 25 30 16546 16546 40 60 60 4000 A 16547 16547 50 60 60 5000 A 16548 16548 60 120 6000 A 16549 16549 70 120
Current transformers Dimensions 0 TI current transformers E58377 E58380 E58383 Cat. no. 16500 to 16506, 16451 to 16456 Cat. no. 16509 to 16515, 16459 to 16465 Cat. no. 16518 to 16521, 16468 to 16471 E58376 E58379 E58382 Cat. no. 16523 and 16524, 16473 and 16474 Cat. no. 16526 to 16535, 16476 to 16483 Cat. no. 16537 and 16538 E58375 E58378 E58381 Cat. no. 16540 to 16544 Cat. no. 16545 to 16547 Cat. no. 16548 and 16549 Cylinders E90390 E90391 Cat. no. 16550 Cat. no. 16551