Current transformers (CT) & Shunts

Transcription

1 Current transformers (CT) & Shunts Genreal overview LV CURRENT TRANSFORMERS Product selection guide Standard industrial transformers?????? TCR - TCRO range NEW Current summation JVM 0 9 TCR usbar primary TCR Cable/busbar primary TCR Wound primary TCRO Split core 9 Associated Products PRTC CT protection unit 0

2 Product selection guide Energy metering transformers 0 Product selection guide????????? 0 0 TRANSDUCERS 0 TRANSFORMERS SHEL range CONTROLLING AND RELAYS SHMI range 9 SHMO RANGE DIN rail mounting APPENDIX Class ENERGY METERS POWER MONITORS 0 NETWORK ANALYZERS 00 JVS usbar primary ANALOGUE NEW JVS Cable/busbar primary DIGITAL????????? JVS range SELECTION GUIDE INFO & ADVICE 90

3 Product selection guide Current transformers (CT) SELECTING A STANDARD INDUSTRIAL CURRENT >>> Selecting an energy metering transformer : page TCR 0 TCR TCR TCR TCR TCR TCR TCR TCR Wound primary (connection) x Ø M mm aperture wire Cable primary (mm) Ø 0 Ø Ø Ø Ø Ø usbar primary (m) x 0 0 x 0 x 0 0 x x 0 x 0 x 0 x x 0 x x x x 0 x 0 0 x 0 0 x 0 0 x 0 A 0 A A 0 A A 0 A 0 A A A A 00 A A A 00 A A 00 A 00 A 0 A 0 A A 00 A 000 A 00 A 0 A 000 A 0 A 000 A 000 A 00 A Advantages TCR primary 9 Combining a high level of accuracy and compact design TCR Cable/busbar primary 9 Come in a wide range of primaries Mounting accessories supplied as standard Secondary A or A as standard Secondary A as standard Secondary A optional Secondary A only

4 TRANSFORMER TCR usbar primary 9 TCRO Split core 9 ENERGY METERS POWER MONITORS NETWORK ANALYZERS TCR 0 TCR 90 TCR 00 TCRO 00 TCRO 0 TCRO 00 TCRO 00 TCRO 0 00 x 0 00 x 0 x 0 x 0 x 0 0 x 0 0 x 0 0 x ANALOGUE DIGITAL TRANSDUCERS TRANSFORMERS CONTROLLING AND RELAYS APPENDIX Complete products for 00 and mm busbar type A wide range adapted to most primaries. Installation w/o disconnection INFO & ADVICE RANGE INFO 90 9

5 Product selection guide Current transformers (CT) & shunts SELECTING A CURRENT TRANSFORMER FOR ENERGY METERING JVS Cable/busbar primary JVS JVS JVS 0 JVS JVS 0 JVS JVS Cable primary (mm) Ø Ø Ø Ø usbar primary (mm) 0 x 0 0 x x 0 x 00 x 0 00 x 0 x x 0 x x x 0 0 x 0 0 x 0 0 x 0 00 A A 00 A A 00 A 00 A 0 A 0 A A 00 A 000 A 00 A 0 A 000 A 0 A 000 A 000 A 00 A Advantages High-precision range with very little phase shift, particularly adapted to electronic measurement instruments and ideal for energy metering. 0 JVS usbar primary 0 Secondary A as standard Secondary A as standard with individual test certificate Secondary A with or without individual test certificate (available on request)

6 Info & advice Current transformers (CT) & shunts KEEPING UP WITH CURR TRANSFORMERS Current transformers supply low voltage measuring instruments and isolate them from the network. They supply a standard current to the secondary that is proportional to the primary current. SELECTING A TRANSFORMER MOUNTING TYPE AND PRIMARY NOMINAL CURRENT The choice depends on the types of bars or cables and the nominal current on your installation. WOUND PRIMARY for currents less than A ACCURACY CLASS The accuracy class is defined according to the errors generated by on each element of the measurement line. The accuracy class of the CT should be less than or equal to that of the measuring instrument it supplies, especially where energy metering is concerned, where the accuracy impacts directly on the billing. PERMITTED POWER CALE PRIMARY for currents between 0 and 0 A USAR PRIMARY for currents between to 00 A This is the apparent power (in VA) that the CT must supply to the secondary in order to maintain its accuracy class. It is necessary to add the power absorbed by the measuring instruments ay be quite important. It is necessary to choose a CT whose power is slightly greater than the result of this calculation while avoiding too great a safety margin. This power, even though it may seem comparatively low, has a direct impact on the specifications of the CT. Moreover, the accuracy class is only guaranted for a real load between % and 00 % of the nominal power (between % and 00 % for class ). A CT oversized in VA will be more expensive. SPLIT CORE PRIMARY for easy connection to an existing installation using a busbar or cable primary Power (VA) in class Weight 00 A A A 0 0. A A Dissipated power per metre double line Cross-section Secondary A Secondary A. mm 0. VA 0.0 VA. mm 0. VA 0.0 VA mm 0. VA VA mm 0. VA 0.00 VA SECONDARY: OR A A secondary current of A causes less loss on the line than a A current. A secondary current of A requires less winding for the CT, and so a less expensive and lighter CT than with a current of A. Reference Secondary A Secondary A 00 A A A A A 9 9 0

7 ENT CHANGES... CONNECTING YOUR CT supply use Secondary It is important to always install the transformer in the right direction, especially on three-phase networks, so as not to invert the phase shift between the current and the voltage on one or more of the phases. The shunts create a standard voltage drop that can be processed by measuring instruments. Though essentially used on direct currents, they can also be used on alternative currents. HOW TO INSTALL A SHUNT? Avoid overheating A shunt emits heat that must be evacuated in order to maintain the accuracy class. Up to 00 A the heat evacuation is by natural convection. eyond this, natural convection must be associated with thermal dissipation in the conductors on which it is mounted. Natural convection is best achieved when the shunt is in the horizontal position, with the blades oriented vertically. Calculation of the heat evacuated is carried out by the contractor, especially evacuation by linking bars (size, disposition, number). For use on direct currents, it is recommended not to go beyond 0 % of the nominal current of the shunt and to ensure that the temperature of the latter does not exceed /K: power supply side C (heating plus ambient temperature). For high currents, forced convection is compulsory. Limit derivation currents It is possible to connect one or more receivers to one shunt on condition that the derivation current or the sum of the derivation current is relatively small compared to the nominal rating. You must take into account the additional voltage drop introduced by the length of the derivation wires. The derivation current generally accepted to remain in the accuracy class is ma. /L: installation side FOCUS How to know whether the accuracy class of a CT is respected? If on a CT primary, the current is between 00 % and 0 % of the nominal current, the stated class is respected. In case of a lower current, the IEC standard 0- specifies the tolerances accepted. This tolerance is greater the smaller the measured current is with respect to the rating. The financial importance of selecting an accuracy class adapted to your CT For a consumption of 000 MWh/year and a cost of 0,0 /kwh CT class : ±0 000 kwh = ± 000 CT class 0.: ± 000 kwh = ± 000 CT class 0.S: ± 0 kwh = ± 0 This calculation takes into account neither the class of the measuring instruments, nor loss occurring on the network cables. CT safety rules You must never open the secondary circuit of a CT supplied on the primary. The very high voltage created may cause bodily harm or irreparable damage to the transformer. efore working on the secondary of a CT, it must be short circuited. When a CT is not in use (secondary open) the secondary must be short-circuited before powering up the system. Installation of CT protection unit (PRTC type) allows safe conditions in case of maintenance on instruments connected on a CT secondary circuit. Further remarks concerning shunts They are manufactured using a coppermagnesium-nickel alloy, offering long term stability and a low temperature coefficient. The shunt must be mounted on an insulated support in compliance with the usual rules applicable to current conductors (in LV see NFC 00). An extremity may be grounded depending on use. QUIZZ Test your knowledge: An oversized CT is: inefficient dangerous outside the class A CT secondary current of A is more expensive: true false sometimes Which of these ranges enables you to obtain the least energy metering error? TCR JVS GENERAL OVERVIEW RANGE INFO 9 ENERGY METERS POWER MONITORS NETWORK ANALYZERS ANALOGUE DIGITAL TRANSDUCERS TRANSFORMERS CONTROLLING AND RELAYS APPENDIX To check your answers visit our site:

8 Current transformers (CT) TCR RANGE Current transformers designed to supply analogue or digital measuring instruments. Accuracy class 0.// TCR wound primary Outputs on split terminals enabling short-circuiting of the secondary current (M or cage for mm wire) TCR Cable/busbar primary Standard industrial transformers Supplied with bar clamp fitting accessories DIN rail mounting using supplied clip on adapters for TCR - - TCR usbar primary Mounting on cabinet base using removable screw-on clips TCRO Split core primary PRODUCT ADVANTAGES EXTENDED RANGE: primary currents from to 00 A and A or A secondary currents DIN RAIL MOUNTING: on plate mounting or fixed around busbars COMPACT DESIGN General specifications Reference standards: EN 0- (ex CEI ) Maximum network voltage: 0 Vac Dielectric test voltage: kv/ Hz/mn Frequency response: / Hz Short-circuit thermal current (Ith): In - second Dynamic current (Idyn):. Ith Safety factor: < Operating conditions Temperature: -0 C to + C Relative humidity: < 90 % Protection Protection rating: IP (terminal covers supplied) Dry winding with self-extinguishing AS covering (UL 9VO) E F C CT Mounting A E F C Gmax A D Dimension Model A TCR 0 Gmax TCR - D TCR TCR TCR TCR 9 TCR 9 TCR.. TCR 09 TCR 0 9 TCR 90 TCR 00 C D Mounting accessories E F G DIN rail Surface mounting busbar clamp Model fittings fittings TCR TCR 9 00 TCR TCR TCR TCR TCR TCR TCR TCR 0 TCR 90 TCR 00 Standard accessories Accessories on request

9 TCR Wound primary TCR 0 TCR ENERGY METERS POWER MONITORS 0, x mm aperture TCR 0 0, 0, 0 Ø M et M 0 0 M M 0 0 M M TCR TCR : mm wire Secondary: mm wire, 0 0 NETWORK ANALYZERS ANALOGUE 0, 0, 0, Ø, 0 A M0X Ø, 0 A M0X A A A A A A A A A A A Ø,, A A. 0. A A. 0. A A A. 0. A. 0. A. 0. PRIMAIRE SECONDAIRE DIN (EN 0) FIXATION A A. 0. A A. 0. A A A. 0. A. 0. DIGITAL TRANSDUCERS TRANSFORMERS CONTROLLING AND RELAYS T O O R D E R Secondary A Secondary A A A 9 90 A A 9 90 A A A 9 90 A A 9 90 A A 90 A 90 A 90 Secondary A Secondary A A A 9 90 A A 9 90 A A A 9 90 A A 9 90 Secondary A Secondary A A A 9 90 A A 9 90 A A A 9 90 A APPENDIX Associated products Mounting accessories 9 PRTC CT protection unit 0 SELECTION GUIDE INFO & ADVICE RANGE INFO RANGE CONTD

10 0, 9 0, Standard industrial transformers Current transformers (CT),,,, 9 0 TCR RANGE Cable Ø 0 mm ar: x 0 mm - 0 x 0 mm x mm, 9, 0, 0,, 9 9,,, 9 Power (VA) class 0, Weight 0 A A A A A A.. 0. A A A.. 0., TCR 0, TCR 0,,, 9 Cable Ø mm ar: 0 x mm - x mm 0 x 0 mm 0 9, 9,, 0, TCR Cable/busbar primary 0, 0,, 9, 00 A A A A A A A A A TCR TCR Cable Ø mm ar: 0 x 0 mm - x mm 0 x 0 mm A A A A A A A A A Secondary A Secondary A 0 A 9 90 A A 9 90 A A 9 90 A 9 90 A A A 9 90 T O O R D E R Secondary A Secondary A 00 A 9 90 A 9 90 A A A A A A A 9 90 Secondary A Secondary A 00 A 9 90 A 9 90 A A A A A A A 9 90 Associated products PRTC CT protection unit 0

11 TCR Cable/busbar primary ENERGY METERS POWER MONITORS TCR TCR TCR TCR NETWORK ANALYZERS Cable Ø mm ar: 0 x mm - 0 x mm 0 x 0 mm.. Cable Ø mm ar: x 0 mm - x mm,, 9 Cable Ø mm ar: x mm - x mm 0 x 0 mm. 0 M. ANALOGUE.. 0., ,,.., 9 0, 0, DIGITAL. 0,, 0, Power (VA), class Weight 00 A A A A.. 0. A A A A A A A A A A 0 0. A A A A A T O O R D E R 00 A A A A A A A A A A A M TRANSDUCERS TRANSFORMERS CONTROLLING AND RELAYS APPENDIX Secondary A Secondary A 00 A 9 90 A 9 90 A A A A A A A 9 90 A A 9 90 Secondary A Secondary A 00 A A A 9 90 A A A A A 9 90 Secondary A Secondary A 00 A A A 9 90 A A A A A A A A 9 90 Associated products PRTC CT protection unit 0 SELECTION GUIDE INFO & ADVICE RANGE INFO RANGE CONTD

12 Standard industrial transformers Current transformers (CT) TCR RANGE ar 00 x 0 mm,, 9 0 TCR 00 TCR 0 0 A A A A A A ar 00 x 0 mm 0, 90 TCR Cable/busbar primary 0 0 A A A A A TCR 90 TCR 00 ar x mm A A A A A A A A 0 0. T O O R D E R Secondary A Secondary A A A A A A A 9 90 Associated products PRTC CT protection unit 0 Secondary A Secondary A 0 A A A A A Secondary A Secondary A 000 A A A A A A A A 90

13 TCRO RANGE Current transformers designed for insertion on electrical installations without disconnection conductor ENERGY METERS POWER MONITORS TCRO Cable/busbar primary Captive sealable terminal covers. Split output terminals enabling risk-free short-circuiting of the secondary current (cage for mm wire) NETWORK ANALYZERS ar clamp fitting ANALOGUE DIGITAL Plate mounting fitting TRANSDUCERS PRODUCT ADVANTAGES PRIMARY from 00 to 00 A and wide choice of primary options FULLY OPENING primary TRANSFORMERS C F General specifications Reference standard: EN 0- (ex CEI ) Maximum network voltage: 0 Vac Dielectric test voltage: kv/ Hz/mn Frequency response: / Hz E Short-circuit thermal current (Ith): In - second Dynamic current (Idyn):, Ith Safety factor:< Operating conditions: Temperature: - 0 C to + C Relative humidity: < 90 % Protection: Protection rating: IP (terminal covers supplied) Dry winding with self-extinguishing AS covering (UL 9 VO) CONTROLLING AND RELAYS APPENDIX A Gmax D CT Mounting Mounting accessories F Gmax E D Dimensions Model A C D E F G TCRO TCRO TCRO TCRO TCRO 0 0 Model TCRO 00 TCRO 0 TCRO 00 TCRO 00 TCRO 0 Cabinet base fittings busbar clamp Standard accessories SELECTION GUIDE INFO & ADVICE RANGE INFO RANGE CONTD

14 Standard industrial transformers Current transformers (CT) TCRO RANGE ar 0 x 0 mm TCRO (kg) 00 A A A A Associated products 9 9 TCRO ar x 0 mm 0 0 TCRO 0 TCRO (kg) A A A A A A A T O O R D E R TCRO Split core ar 0 x 0 mm A A A A A A A Secondary A Secondary A Secondary A 00 A 90 0 A 90 A 90 A A A A A A A 90 0 A 90 0 A 90 0 A 90 0 A A A A A 90 On request: secondary A On request: secondary A On request: secondary A PRTC CT protection unit 0

15 TCRO split core ENERGY METERS POWER MONITORS TCR 00 TCRO TCRO 00 0 TCRO 0 NETWORK ANALYZERS ar 0 x 0 mm ar 0 x mm ANALOGUE 0 0 DIGITAL TRANSDUCERS Power (VA) class Weight 0 A A A A A.0 0 A 0.0 Power (VA) class Weight 000 A A A 0. 0 A A A A 0 0. TRANSFORMERS CONTROLLING AND RELAYS T O O R D E R APPENDIX Secondary A 0 A 90 0 A A A A 90 0 A 90 Associated products PRTC CT protection unit 0 On request: secondary A Secondary A 000 A 90 0 A A 90 0 A A A A 90 On request: secondary A SELECTION GUIDE INFO & ADVICE RANGE INFO

16 Current transformers (CT) JVS RANGE 0, class CTs for the supply of electronic measuring and metering equipment according to IEC : power monitors, digital transducers, etc. Split output terminals enabling risk-free short-circuiting of the secondary current (cage for mm wire) JVS usbar primary 0 Energy metering transformers Captive sealable terminal covers JVS Cable/busbar primary 0 Cabinet base fitting (or directly on busbar primary) PRODUCT ADVANTAGES WIDE CHOICE OF PRIMARIES from 00 to 0 A ACCURACY CLASS: 0. for high-performance applications General specifications F C Reference standard: EN 0- (ex CEI ) Maximum network voltage: 0 Vac Dielectric test voltage: kv/ Hz/mn Frequency response: / Hz Short-circuit thermal current E - second (Ith): In Dynamic current (Idyn):. Ith Safety factor: < Operating conditions: Temperature: -0 C to + C Relative humidity: < 90 % Protection: Protection rating: IP (terminal covers supplied) Dry winding with self-extinguishing AS covering (UL 9 VO) CT Mounting Mounting accessories Gmax A E F C Gmax A D Model JVS JVS JVS 0 JVS JVS 0 JVS JVS D Dimensions A C D E F G Model JVS JVS JVS 0 JVS JVS 0 JVS JVS Cabinet base fittings busbar clamp Standard accessories

17 JVS Cable/busbar primary ENERGY METERS POWER MONITORS JVS JVS JVS NETWORK ANALYZERS ANALOGUE Cable ø mm ar: 0 x 0 mm x mm 0 x 0 mm 0. Power (VA) Weight in class 0. S (kg) 00 A 0. A A. 0. A A A Cable ø mm ar: 0 x mm 0 x mm 0 x 0 mm Power (VA) Weight in class 0. S (kg) A A. 0. A A A 0. 0 A 0. 0 A 0. A A. 0. DIGITAL TRANSDUCERS TRANSFORMERS CONTROLLING AND RELAYS Secondary A 00 A JVS 00/ A JVS / 00 A JVS 00/ A JVS / 00 A JVS 00/ 00 A JVS 00/ Supplied with individual test certificate T O O R D E R Secondary A A JVS 00/ 00 A JVS 00/ A JVS / 00 A JVS 00/ 00 A JVS 00/ 0 A JVS 0/ 0 A JVS 0/ A JVS / 00 A JVS 00/ APPENDIX Associated products PRTC CT protection unit 0 SELECTION GUIDE INFO & ADVICE RANGE INFO RANGE CONTD

18 ,,,, Energy metering transformers Current transformers (CT) 0, 9, 0. JVS RANGE,,,, JVS 0 JVS 0 0, 9 Cable ø mm ar: x 0 mm x mm Power (VA) Weight in class 0. S (kg) 0 A 0. A A A A A JVS Cable/busbar primary JVS Cable ø mm ar: x mm x 0 mm 0 x 0 mm Power (VA) Weight in class 0. S (kg) 000 A A A A A A 0 0. M M 0 T O O R D E R.. 0. Secondary A 0 A JVS0 0/ A JVS0 / 00 A JVS0 00/ 000 A JVS0 000/ 00 A JVS0 00/ 0 A JVS0 0/ Secondary A 000 A JVS 000/ 00 A JVS 00/ 0 A JVS 0/ 000 A JVS 000/ 0 A JVS 0/ 000 A JVS 000/. 0 Supplied with individual test certificate Associated products PRTC CT protection unit 0

19 JVS JVS JVS busbar primary ENERGY METERS POWER MONITORS JVS 0 JVS JVS NETWORK ANALYZERS ar: 00 x 0 mm 9 ar: 00 x 0 mm ar: x mm ANALOGUE DIGITAL TRANSDUCERS Power (VA) Weight in class 0. S (kg) 000 A A 0. 0 A A 0 0. Power (VA) Weight in class 0. S (kg) 0 A A A A A T O O R D E R Power (VA) Weight in class 0. S (kg) 000 A A A A A A A 0. TRANSFORMERS CONTROLLING AND RELAYS APPENDIX Secondary A 000 A JVS0-000/ 00 A JVS0-00/ 0 A JVS0-0/ 000 A JVS0-000/ Supplied with individual test certificate Secondary A 0 A JVS-0/ 000 A JVS-000/ 0 A JVS-0/ 000 A JVS-000/ 000 A JVS-000/ Secondary A 000 A JVS-000/ 0 A JVS-0/ 000 A JVS-000/ 0 A JVS-0/ 000 A JVS-000/ 000 A JVS-000/ 00 A JVS-00/ Associated products PRTC CT protection unit 0 SELECTION GUIDE INFO & ADVICE RANGE INFO

20 Current summation Current transformers (CT) JVM CURRENT SUMMATION: JVM CT designed for adding or substract instantaneous values from the secondary of or current transformers. Used to supply measuring or metering instruments on installations with several departure and arrival points. PRODUCT ADVANTAGES Sealable cover. Terminal connections: M; secondary slots for double connections; primary side connections. Mounting on symmetric slide rail or fitting to cabinet base. COMPACT DESIGN FITTED for surface or DIN rail mounting General specifications Reference standard: EN 0- (ex CEI ) Maximum network voltage: 0 Vac Dielectric test voltage: kv/ Hz/mn Frequency response: / Hz Short-circuit thermal current (Ith): 0 In - second Dynamic current (Idyn):. Ith Safety factor:< Internal power: VA Operating conditions: Temperature: - C to + C Relative humidity: 9 % at 0 C Protection: Protection rating: IP 0 (module casing) and IP 0 (terminals) Dry winding with self-extinguishing AS covering (UL 9 VO) Cabinet accessories Model CT slide CT slide CT slide rail mounting rail mounting rail mounting JVM ACCE ACCE ACCE fittings (M) Scalable cover A A TO ORDER Secondary A + A JVMA ++ A JVMA Sealable cover ACCE M