LOW-VOLTAGE CURRENT TRANSFORMERS

GENERAL OVERVIEW OF CURRENT TRANSFORMERS CURRENT TRANSFORMER is used for measurement of electric alternating currents. When current in a circuit (primary current) is too high to directly apply to measuring instruments, a current transformer produces a reduced current (secondary current) accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. A current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit. Relationship between primary and secondary currents is called...

GENERAL OVERVIEW OF CURRENT TRANSFORMERS Power requirements for measuring apparatur and relays: • Analog moving-iron meters 0.7 – 1.5VA • Rectifier current meters 0.001 – 0.250 VA • Multi-range current meters 0.005 – 5.000 VA • Current recorders 0.300-9.000 VA • Bimmetalic ammeters 2.5 – 3.0 VA • Power meter 0.2 – 5.0 VA • Power factor meter 2.0 – 6.0 VA • Meters 0.4 – 1.0 VA • Relays 0.2 – 6.0 VA • Power transducers 0.5 VA • Energy meters 2.5 VA CONNECTION DIAGRAMM OF CURRENT TRANSFORMERS IP Internal losses of copper wiring: Where: I – Secondary nominal current, L – Distance in [m], I2 x 2 L...

INSTRUMENT SECURITY FACTOR

INSTRUMENT SECURITY VIEW

INPUT: OUTPUTS: DIMENSIONS Transformer type ORDER ACCESSORIES: Required data: transformer type/primary current/secondary current/power/accuracy class DIN rail mounting base Order example: LCTM 62/W (40) 25/5A, 5VA, c|. 1 order rode: LH000-0904-130-124

INPUT: OUTPUTS: DIMENSIONS LCTR 50/14 (30) Transformer type

LCTR 50/14 (50) Transformer type ORDER ACCESSORIES: Required data: transformer type/ primary current/ secondary current/ power/ accuracy class DIN rail mounting base Order example: LCTR 50/14 (50) 100/5A, 5VA, cl. 1 - for details see page 25

INPUT: OUTPUTS: LCTB 45/21 (40) Transformer type ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTB 45/21 (40) 100/5A, 3.75VA, cl. 1 ACCESSORIES: DIN rail mounting base order code: LH000-0904-130-002

Transformer type

Transformer type ORDER ACCESSORIES: Required data: transformer type/ primary current/ secondary current/ power/ accuracy class DIN rail mounting base Order example: LCTB 50/21 (50) 100/5A, 5VA, cl. 1 - for details see page 25

INPUT: OUTPUTS: DIMENSIONS Transformer type

LCTB 62/30 (50) Transformer type ORDER ACCESSORIES: Required data: transformer type/ primary current/ secondary current/ power/ accuracy class DIN rail mounting baseOrder example: LCTB 62/40 (40) 100/5A, 1VA, cl. 1 - for details see page 25 18

Transformer type LCTB SERIES

Transformer type ORDER ACCESSORIES: Required data: transformer type/ primary current/ secondary current/ power/ accuracy class DIN rail mounting baseOrder example: LCTB 74/50 (45) 100/5A, 1.5VA, cl. 1 order code: LH000-0904-130-124 20

Transformer type ORDER ACCESSORIES:Required data: transformer type/ primary current/ secondary current/ power/ accuracy class DIN rail mounting baseOrder example: LCTB 86/50 (45J100/5A, 1.5VA, cl. 1 order code: LH000-0904-130-124LCTB SERIES 21

INPUT: OUTPUTS: DIMENSIONS LCTB 100/130V (45) Transformer type ACCESSORIES: DIN rail mounting base order code: LH000-0904-130-124 ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTB 100/130V (45) 400/5A, 2.5VA, cl. 1 DITELj> LUMEL

INPUT: OUTPUTS: DIMENSIONS LCTB 104/60 (45) Transformer type LCTB 104/60 (45) ORDER ACCESSORIES:

INPUT: OUTPUTS: LCTB 140/100H (45) Transformer type

Transformer type ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTB 140/100H (45) 200/5A, 3.75VA, cl. 1

LCTB 225 - BUSBAR SERIES LCTB 225/125 (50) Primary current Secondary current Accuracy class Transformer type Accuracy class Rated primary current ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTB 225/125 (50) 600/5A, 10VA, cl. 1

Side view (dimensions in mm) yra Front view (dimensions in mm) Transformer type ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTS 93/30SC (40) 100/5A, 1.5VA, cl. 1 LCTS SERIES

Transformer type ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTP140/31 (40) 600/5A; 2.5 VA; cl. 1 DITEL*> L U M E L

INPUT: OUTPUT: DIMENSIONS Transformer type ORDER Required data: transformer type/ primary current/ secondary current/ power/ accuracy class Order example: LCTP 185/27 (45) 100/5 A, 1.5 VA, cl. 1

Thread Cutting Screw Shoe for Self Tapping Screw Wall Mounting Clamp (additional accessories - have to be order separatly) Order code DITEL*> H&Uly LUMIL

(delivered with each current transformer)

DISEÑOS Y TECNOLOGÍA S.A. Xarol 6-B P.I. Les Guixeres 08915 BADALONA - SPAIN tel.: +34 933 394 758 fax +34 934 903 145 www.ditel.es made in POLAND by: LUMEL S.A. www.lumel.com.pl