LOW-VOLTAGE CURRENT TRANSFORMERS
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- Lorraine Harmon
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1 LOWVOLTAGE CURRENT TRANSFORMERS 5 A Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra
2 CONTENTS General specification of lowvoltage current transformers...3 LCTM wound primary series...5 LCTR round conductor series A LCTB 45 busbar series...8 LCTB 50 busbar series...9 LCTB 6 busbar series... LCTB 74 busbar series...3 LCTB 86 busbar series...5 LCTB 00 busbar series...6 LCTB 04 busbar series...7 LCTB 40 busbar series...8 LCTB 5 busbar series...0 LCTS and 3phase split core... P4 and P43 Accessories.... Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra
3 LOWVOLTAGE 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 rated transformation ratio. I = I. N N where: I primary current, I secondary current, N number of turns of primary winding, N number of turns of secondary winding, N/N rated transformation ratio Current transformers are used mainly in such a way that the cable from the measured shock or bus current passes through the main hole transformer, which is equivalent to one coil primary winding. In this case, the above equation simplifies to: I = I. N The task is to reduce the transformer output current for currents of over 0% of measurement range, to protect against destruction of measuring devices connected to the transformer in case of surges or failures in the primary circuit. FEATURES : Class FEATURES: Wide range of accuracy classes: S,,, Wide range of supported primary currents, the dimensions of rails, the length of casing and hole diameters. Multiple mounting methods, including wall mounting, DIN rail 35mm, the conductor, a current bar. Shields designed to seal connections. GENERAL SPECIFICATION Applicable standard: Case: IEC/EN 60044, BS 3938, IS 705 0% glass filled polycarbonate, flame retardant grades classified UL 94V0 Connection: Two connection on each side. M4 screws with self lifting clamp strap. Insulation class E (0 C max) System voltage: 70 V maximum Operating frequency: 50 Hz Rated primary rating: A 7 Rated secondary output: 5 A or A Rated burden:,.5,.5,.5, 3.75, 5, 7.5, 0,.5, 5, 0, 30, 45, 60, 00 VA :, S for laboratory and power measurement for accurate measuring for general measurement, for analog meters Ambient temperature: 0 C +45 C Storage temperature: 50 C +80 C Thermal short circuit current (Ith): 40 x In for wound type 60 x In for bus bar type Dynamic short circuit current (Idyn):.5xIth Instrument security factor (FS):.5, 5, 0 Power network meters ND0 and ND type. N4Z and N5Z DEMAND FOR POWER MEASURING DEVICES: CT users expect these devices fulfill two basic conditions: a high degree of accuracy in the nominal current, security functions with overloads. In order to fulfill these stipulations it is necessary for the power of a current transformer offered to fully achieve the actual power requirements of the measurement setup. In ascertaining the actual power requirements, consideration is to be made not only of the loss of power of the appliances to be connected up, but also the losses incurred by the instrument leads. Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 3
4 LOWVOLTAGE CURRENT TRANSFORMERS : FEATURES Class Power requirements for measuring apparatur and relays: Analog movingiron meters 0.7.5VA Rectifier current meters VA Multirange current meters VA Current recorders VA Bimmetalic ammeters VA Power meter 5.0 VA Power factor meter VA Meters VA Relays 6.0 VA Power transducers 0. Energy meters. Internal losses of copper wiring: P= Where: I Secondary nominal current, L Distance in [m], qcu wire crosssection in [mm]. I x L [VA] qcu x 56 Table for values appertaining to 5 A qcu m m 3m 4m 5m 6m 7m 8m 9m 0 m mm mm mm mm Table for values appertaining to A qcu 0 m 0 m 30 m 40 m 50 m 60 m 70 m 80 m 90 m 00 m.0 mm mm mm mm mm Factor of safety (FS) and 3phase P4 and P43. FS class and Transformer type Remarks Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 4 Remarks Busbar series LCTB LCTM 6/W (40) LCTB 74/0 (45) LCTM 74/W (45) LCTB 74/30 (45) Range: 7 and 80A, FS 0, class: LCTB 74/40 (45) LCTR 45/4 (40) LCTB 74/50 (45) LCTR 50/4 (30) LCTB 86/40 (45) Range: 00A, 0A i, FS 0, class: LCTR 50/4 (50) LCTB 86/50 (45) Range: 0A and, FS 0, class: LCTR 6/R (40) LCTB 86/60 (45) Range: 00A, FS 0, class:, Range: 00A, FS 0, class: LCTB 00/00V (45) Range: 400A, 500A, 600A i 750A, FS 0, class: Range: 00A,0A and, FS 0, class: Busbar series LCTB FS class and Wound primary series LCTM Round conductor series LCTR Digital meter N30P type LCTB 45/ (40) LCTB 00/30V (45) Range: 400A, 500A and 600A, FS 0, class: LCTB 50/ (30) LCTB 04/60 (45) Range: 50A and 00A, FS 0, class:, Range: 00A, 0A and, FS 0, class: LCTB 50/30 (30) LCTB 04/80 (45) Range: 50A and 300A, FS 0, class: LCTB 50/ (50) LCTB 40/80 (45) LCTB 50/30 (50) LCTB 40/00H (45) Range: 00A and 50A, FS 0, class: LCTB 6/0 (40) LCTB 40/00V (45) Range: 00A, 50A and 300A, FS 0, class: LCTB 6/30 (40) LCTB 40/30V (45) Range: 4000A and 5000A, FS 0, class: and LCTB 6/40 (40) LCTB 5/5 (50) LCTB 6/30 (50) LCTB 5/67 (50) Range 000A, 6000A and 7500A, FS 0, class:
5 WOUND PRIMARY SERIES LCTM LCTM 6/W (40) LCTM 74/W (45) Depth 6 mm 74 mm Width 40 mm Primary winding A...5 A A...60 A Secondary winding A, 5 A A, 5 A ; ; ; ; LCTM 74/W (45) LCTM 6/W (40) LCTM 6/W (40) : LCTM 74/W (45) Rated primary current A...5 A A.. 0 A.. 5 A.. 0 A.. 5 A.. 30 A. 40 A. 50 A. 60 A. ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTM 6/W (40) 5/, 5VA, cl. Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 5
6 LCTR ROUND CONDUCTOR SERIES LCT R 45/4 (40) LCT R 50/4 (30) Ø 4 mm Ø 4 mm Ø 4 mm Ø mm Width 40 mm 3 mm 5 mm 40 mm Depth 50 mm 50 mm 6 mm 30 A A A A... A, 5 A A, 5 A A, 5 A A, 5 A ; ; ; ; ; Hole diameter Primary winding Secondary winding Accuracy class LCTR50/4(50) LCTR6/R(40) LCTR 50/4 (30) LCTR 45/4 (40) and 3phase P4 and P43. LCTR 45/4 (40) Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 6 Rated primary current Digital meter N30P type LCTR 50/4 (30) 30 A 40 A 50 A.. 60 A.. 75 A.. 80 A.. 00 A A A A A A VA
7 ROUND CONDUCTOR SERIES LCTR LCTR 50/4 (50) LCTR 6/R LCTR 50/4 (50) LCTR 6/R Rated primary current 30 A 40 A 50 A A A A A A A A A A.. 7. ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTR 50/4 (50) 00/, 5VA, cl. ACCESSORIES: DIN rail mounting base order code: Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 7
8 LCTB 45 BUSBAR SERIES LCTB 45/ (40) Hole diameter Busbar 0 x 0 mm Depth 40 mm Width Primary winding Secondary winding Ø 0 mm 50 A... A, 5 A ; LCTB 45/0 (40) and 3phase P4 and P43. Rated primary current Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 8 LCTB 45/0 (40) 50 A. 60 A. 75 A. 80 A. 00 A A A A. 00 A A 3.7 ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 45/ (40) 00/, 3.75VA, cl. ACCESSORIES: DIN rail mounting base order code:
9 BUSBAR SERIES LCTB 50 LCTB 50/ (30) LCTB 50/30 (30) LCTB 50/ (50) LCTB 50/30 (50) Ø mm Ø mm 0 x 0 mm 30x0mm,0x5mm, 0x0mm,x0x0mm 0 x 0 mm 30x0mm,0x5mm, 0x0mm,x0x0mm Depth 3 mm 3 mm 5 mm 5 mm Width 50 mm 50 mm 50 mm 50 mm 40 A A A A... Secondary winding A, 5 A A, 5 A A, 5 A A, 5 A Accuracy class ; ; ; ; Hole diameter Busbar Primary winding LCTB 50/30 (30) LCTB 50/ (30) LCTB 50/ (30) LCTB 50/30 (30) Rated primary current 40 A 50 A 60 A 75 A. 80 A.. 00 A... 0 A... 5 A A A A Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 9
10 LCTB 50 BUSBAR SERIES LCTB50/ (50) LCTB 50/30 (50) LCTB 50/ (50) and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; ul. Słubicka 657 Zielona Góra 0 LCTB 50/30 (50) Rated primary current 50 A.. 60 A.. 75 A A.. 00 A.. 0 A A. 50 A 00 A A ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 50/ (50) 00/, 5VA, cl. ACCESSORIES: DIN rail mounting base order code:
11 BUSBAR SERIES LCTB 6 LCTB 6/0(40) LCTB6/30(40) LCTB6/30(50) LCTB6/40(40) Hole diameter Ø 30 mm Ø 30 mm Ø 3 mm Busbar 0x mm, x5x6 mm 30x0 mm, x5 x0 mm 30x0 mm, x5x0 mm 40x0 mm, x30x0 mm Depth 40 mm 40 mm 50 mm 40 mm Width 6 mm 6 mm 6 mm 6 mm 50 A A A 00 A A 40 A A Secondary winding A, 5 A A, 5 A A, 5 A A, 5 A Accuracy class S; ; ; S; ; ; S; ; ; S; ; ; Primary winding LCTB 6/0 (40) LCTB 6/30 (40) LCTB 6/0 (40) LCTB 6/30 (40) S 50 A. 60 A 75 A 80 A 00 A. 0 A S VA A A VA A A A 800 A Power transformer Rated primary current Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra
12 LCTB 6 BUSBAR SERIES LCTB 6/40 (40) LCTB 6/30 (50) LCTB 6/30 (50) S Rated primary current and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra LCTB 6/40 (40) S 40 A 50 A. 60 A. 75 A.. 80 A A.. 0 A... 5 A A VA VA A 3 VA A 3 VA... 3 VA A A 6.. ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 6/40 (40) 00/, VA, cl. ACCESSORIES: DIN rail mounting base order code:
13 LCTB 74 BUSBAR SERIES LCTB74/0(45) LCTB74/30(45) LCTB74/40(45) LCTB74/50(45) Ø 0 mm Ø 6 mm Ø 35 mm Ø 4 mm 0x0 mm 30x5 mm, x0x0 mm 40x mm, x30 x5 mm 50x mm, x40x0 mm Depth Width 74 mm 74 mm 74 mm 74 mm 30 A A A 40 A A 00 A A A, 5 A A, 5 A A, 5 A A, 5 A S; ; ; S; ; ; S; ; ; Hole diameter Busbar Primary winding Secondary winding Accuracy class S; ; ; LCTB 74/0 (45) LCTB 74/30 (45) LCTB 74/0 (45) LCTB 74/30 (45) S 30 A. 40 A 50 A A 75 A A A A A A A.. 50 A A A Rated primary current S Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 3
14 LCTB 74 BUSBAR SERIES LCTB 74/40 (45) LCTB 74/50 (45) LCTB 74/40 (45) S Rated primary current and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 4 LCTB 74/50 (45) S 40 A 50 A 60 A 75 A. 80 A. 00 A... 0 A... 5 A A A A A. 800 A A. ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 74/50 (45) 00/,.5VA, cl. ACCESSORIES: DIN rail mounting base order code:
15 BUSBAR SERIES LCTB 86/40 (45) LCTB 86/50 (45) LCTB 86/60 (45) Ø 36 mm Ø 46 mm Ø 5 mm Busbar 40 x 0 mm, x 30 x 5 mm 50 x mm, x 40 x 5 mm 60 x mm, x 50 x 5 mm Depth 5 mm Width 86 mm 86 mm 50 mm 50 A A 00 A...50 A 50 A... A, 5 A A, 5 A A, 5 A S; ; ; S; ; ; S; ; ; Hole dimeter Primary winding Secondary winding LCTB 86 LCTB 86/50 (45) LCTB 86/40 (45) LCTB 86/60 (45) Accuracy class LCTB 86/40 (45) S LCTB 86/50 (45) S Rated primary current LCTB 86/60 (45) S 50 A. 60 A. 75 A. 80 A. 00 A A A A A A A A A. 00 A. 50 A. ORDER You must give: transformer type / primary current / secondary current / power / accuracy class ACCESSORIES: DIN rail mounting base Order example: LCTB 86/50 (45) 00/,.5VA, cl. order code: Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 5
16 LCTB 00 BUSBAR SERIES LCTB 00/00V (45) LCTB 00/30V (45) Busbar 4 x 03 mm 38 x 8 mm Depth Width 00 mm 00 mm A, 5 A A, 5 A S; ; ; ; ; Primary current Secondary current LCTB 00/30V (45) LCTB 00/00V (45) and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl LCTB 00/00V (45) S Primary current LCTB 00/30V (45) A A A 00 A 50 A A A ul. Słubicka 657 Zielona Góra 6 ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 00/30V (45) 400/,.5VA, cl. ACCESSORIES: DIN rail mounting base order code:
17 BUSBAR SERIES LCTB 04 LCTB 04/60 (45) LCTB 04/80 (45) Ø 54 mm Ø 65 mm Busbar 60 x mm, x 50 x 5mm, x 40 x 0 mm 80 x mm, x 60 x 5 mm, x 50 x 5 mm Depth Width 04 mm 04 mm 00 A A A A, 5 A A, 5 A S; ; ; S; ; ; Hole diameter Primary current Secondary current LCTB 04/80 (45) LCTB 04/60 (45) LCTB 04/60 (45) S Rated primary current LCTB 04/80 (45) S 00 A. 0 A. 5 A. 50 A.. 00 A. 50 A A 800 A A A 4 50 A A ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 04/60 (45) 00/,.5VA, cl. ACCESSORIES: DIN rail mounting base order code: Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 7
18 LCTB 40 BUSBAR SERIES LCTB 40/80 (45) LCTB 40/00H (45) LCTB 40/00V LCTB 40/30V (45) Ø 7 mm Ø 86 mm Ø 86 mm Busbar 80 x 30 mm, x 60 x 5 mm 00 x 30 mm, x 80 x 5 mm, x 70 x 30 mm 00 x 30 mm, x 80 x 5 mm, x 70 x 30 mm 70 x 30 mm Depth 5 mm Width 40 mm 40 mm 40 mm 40 mm 00 A A 00 A A 00 A A A A, 5 A A, 5 A A, 5 A A, 5 A S; ; ; S; ; ; S; ; ; S; ; ; Hole diameter Primary winding Secondary winding Accuracy class LCTB 40/00H (45) LCTB 40/80 (45) and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 8 LCTB 40/80 (45) S Rated primary current LCTB 40/00H (45) S 00 A A A A A 00 A. 50 A A A 4000 A
19 BUSBAR SERIES LCTB 40/00V (45) LCTB 40 LCTB 40/30V (45) LCTB 40/00V (45) S Rated primary current LCTB 40/30V (45) A. 50 A A A 7,. 000 A 00 A A A VA 3000 A 4000 A 5000 A ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 40/00H (45) 00/, 3.75VA, cl. Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 9
20 LCTB 5 BUSBAR SERIES LCTB 5/5 (50) LCTB 5/67 (50) Busbar 3 x 9 mm 66 x 65 mm Depth 50 mm 50 mm Width 5 mm 5 mm A 000 A...7 A, 5 A A, 5 A S; ; ; S; ; ; Primary winding Secondary winding LCTB 5/67 (50) LCTB 5/5 (50) and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 0 LCTB 5/5 (50) S 750 A 800 A 000 A 00 A 50 A LCTB 5/67 (50) S A A A A 00 VA 00 VA A 00 VA 00 VA Rated primary current ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTB 5/5 (50) 600/, 0VA, cl.
21 SPLIT CORE SERIES LCTS Window dimensions LCTS 93/30SC (40) LCTS 5/50SC (40) LCTS 55/80SC (40) LCTS 95/80SC (64) 3 x 33 mm 8 x 5 mm 8 x mm 8 x 6 mm Depth 40 mm 40 mm 40 mm 64 mm Width 93 mm 5 mm 55 mm 95 mm 00 A A A 50 A A A Secondary winding A, 5 A A, 5 A A, 5 A A, 5 A Accuracy class ; ; 3 ; ; ; Primary winding LCTS 5/50SC, 55/80SC, 95/80SC LCTS 93/30SC (40) Side view Front view (dimension in mm) a b c d e 5/50SC (40) 50 55/80SC (40) /80SC (64) Front view Side view (dimension in mm) LCTS 93/30SC (40) Typ a b c d e 5/50SC (40) /80SC (40) /80SC (64) LCTS 5/50SC (40) 3 00 A A A. 50 A A 800 A 000 A 00 A 50 A LCTS 95/80SC (64) , A A A A 4 Rated primary current LCTS 55/80SC (40) ORDER You must give: transformer type / primary current / secondary current / power / accuracy class Order example: LCTS 93/30SC (40) 00/,.5VA, cl. Power network meters ND0 and ND type. N4Z and N5Z Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra
22 ACCESSORIES Terminal Cap Terminal Thread Cutting Screw Swivel Core and 3phase P4 and P43. Shoe for Self Tapping Screw DIN Rail Plate Case Wall Mounting Clamp and 3phase P4 and P43. N4Z and N5Z Digital meter N30P type Description Thread cutting screw 8 x 35mm Thread cutting screw 8 x 45mm Thread cutting screw 8 x 75mm Wall mounting clamp Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra Swivel Shoe for self tapping M4 screw View
23 ACCESSORIES DIN Rail Mounting Base: Order code LCTR 50 (30), LCTB 50 (30) LCTR 45, LCTB LCTM 6W, LCTM 74W LCTR 6 LCTB 6 (40), LCTB 74, LCTB 86, LCTB 00, LCTB 04 View Busbar mounting kit: Kit order code Description No. of pcs Wall mounting clamp LCTR 45, LCTB 45, LCTM 6W, LCTM 74W Thread cutting screw 8 x 35mm Wall mounting clamp Swivel Shoe for self tapping M4 screw Thread cutting screw 8 x 45mm Wall mounting clamp Swivel Shoe for self tapping M4 screw Thread cutting screw 8 x 45mm 4 Wall mounting clamp Swivel 4 Shoe for self tapping M4 screw 4 Thread cutting screw 8 x 75mm 4 Wall mounting clamp Swivel 4 Shoe for self tapping M4 screw 4 Thread cutting screw 8 x 75mm Thread cutting screw 8 x 45mm 5 Wall mounting clamp Shoe for self tapping M4 screw 6 Thread cutting screw 8 x 75mm 6 Wall mounting clamp Shoe for self tapping M4 screw 6 Thread cutting screw 8 x 35mm 6 Wall mounting clamp Shoe for self tapping M4 screw LCTR 50, LCTB 50 LCTR 6, LCTB 6, LCTB 74, LCTB 86 Power network Analog meters meterseand0 type. series LCTB 04 Power network meters ND0 and ND type. LCTB 40 LCTB 40/30 V N4Z and N5Z N4Z and N5Z LCTB 5 LCTB 00/00 V, LCT 00/30 V Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 3
24 5 A and 3phase P4 and P43. Digital meter N30P type Tel: (+48 68) ; ; ; ; export@lumel.com.pl ul. Słubicka 657 Zielona Góra 4 ul. S³ubicka, 657 Zielona Góra, POLAND Export department: (+48 68) ; ; ; ; fax: export@lumel.com.pl ver.6/ may 03
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