CT-100/CT-150 User`s Manual
Contents
1. Figure 7 Rear mounting holes for self threading screws Installation and Operation CT 100 CT 150 Series User s Manual The self threading screws can have a maximum length of 15 mm diameter of 2 9 mm and the types that can be used are hereafter listed e UNI8119 e DIN 7504 P e ISO 15482 2 3 Primary Current Path A non symmetrical layout of the primary current return path may degrade the accuracy and the noise of the current transducer A cross section of the transducer plastic case illustrates what happens if the primary current is not equally distributed over the perimeter of the current transducer head Primary Current ro i N N i z Lt NN edit TER Let N PSN ANNEN GER NGS N N N N i NIN BONN SN DN SR ANN DINER EE OR DCCT Head Figure 8 Primary current path non recommended layout left and recommended layout right Figure 8 left shows what happens if the primary current is routed over one side of the DCCT head the Magnetic flux density is higher in the area between the U path If the current path return is split in two or more paths over the DCCT Head the magnetic flux density is more homogenous over the perimeter and the resulting measurement will be more accurate If the split return path is not possible it is preferable to keep the retuning cable as far as possible from the DCCT Head 2 4 Full Scale Current Rated full sc2. 5 1 CT 100 CT 150 Series SE version Mounting holes for self threading screws UNI 81 19 DIN 7504 P 15015482 Maxlength 15mm Figure 16 Mechanical drawings for CT 100 CT 150 Series C Version E C CT 100 CT 150 Series User s Manual Mechanical Dimensions 5 2 CT 100 CT 150 P version Current direction for positive output voltage Mounting holes for self threading screws UNI 8119 DIN 7504 P 15015482 Max length 15mm Figure 17 Mechanical drawings for CT 100 CT 150 Series P Version
3. O CAENels Geer For Science Ca 7 DC Current Transducer our a Boi CT 100V c 31VC001 1 10v All Rights Reserved CAEN ELS d o o Rev 1 1 November 2014 CT 100 CT 150 Series User s Manual Q CAEN ELS d o o Kraska ulica 2 6210 SeZana Slovenija Mail info caenels com Web www caenels com CT 100 CT 150 Series User s Manual Table Of Contents 1 pA lt A VIN TNEN a wes 9 1 1 CT 100 CT 150 SERIES OVERVIEW ccccccsceccsceccsceccscecescecesescecescecesesceces 9 1 2 CT 100 CT 150 MODELS AND VERSIONS cccecescecescececcsceccscecescecescececes 11 INSTALLATION AND OPERATION ccscccccccccccccccccccccccccccccccccccces 12 2 1 MECHANICAL CONSIDERATIONS c cececcecescececcecescececcececescecescecesescesescecesens 12 2 1 1 C version and PINOUL cdl irc ccccccccccccccaccccccccaccccccscccecccscececeecscsceceececs 13 2 1 2 P version and Pinot venne 14 22 MOUNTING unes cn ee o aa aaa aaa anna anna 15 2 3 PRIMARY CURR nes o akan 16 2 4 FULL SCA L eee 16 2 5 NG NN senere 17 251 ES NE 17 Lp EE NA ae Un 18 2 5 3 Voltage Output IVTverstons omipyerrrr mum merservrorr02nrrrrnrrneeseseferr 18 j i 19 ORDERING OPTIONS eee ooo es ao 00 0 00 2 000 00 2e 800 00 0 2e 800 00 0 0e 8 0 0 00 0 00 00 00 soo 21 TECHNICAL SPE C ee 22 4 1 EQUIVALENT So ee 23 4 2 EXTERNAL SHUNT RESISTOR cccs
4. with the CAEN ELS PS1215 power supply which has been especially deigned in order to obtain low noise Operation and it is suited for DCCT measurement system where switching power supplies could corrupt measuring accuracy precision and noise BNC connection for VoltagezOutput DCCT Power Good LED monitors DCCT side AC Line Input SUB D connector The power supply is available in two different versions one to be used with the current output DCCTs and one with the voltage output ones the PS1212V is shown in the previous image Product Code Description PS1215V AC DC Single Output Dual Voltage 15V Low WPS1215VXAAA Noise Power Supply 27W max 3m cable with DB 9 and BNC Voltage Output PS12151 AC DC Single Output Dual Voltage 15V Low WPS1215IXAAA Noise Power Supply 27W max 3m cable with DB 9 and banana plugs Current Output For more information or further details please refer to the PS1215 User s Manual G CT 100 CT 150 Series User s Manual Read over the instruction manual carefully before using the instrument The following precautions should be strictly observed before using the CT 100 CT 150 DCCTs Do not use this product in any manner not specified by the manufacturer The protective features of this product may be impaired if it is used in a manner not specified in this manual e Do not use the device if it is damaged Before you use the device inspect the instrument for possib
5. 100PXAAAA CT 100 P 100 A Primary Current Ce 7 pin PCB connector 100 A Primary Current Cres DB 9 connector WCT100VCXAAA CT 100V C Voltage Output j CLucs 7 oni WCT100VPXAAA CT 100V P 100 A Primary Current 7 pin PCB connector Voltage Output WCT150CXAAAA CT 150 C 150 A Primary Current Ges DB 9 connector WCT150PXAAAA CT 150 P 150 A Primary Current 7 pin PCB connector WCT150VCXAAA CT 150V C 150 A Primary Current Cres DB 9 connector Voltage Output i CLucs 7 pi WCT150VPXAAA CT 150V P 150 A Primary Current Ce 7 pin PCB connector Voltage Output Table 1 CT 100 CT 150 series versions and models The 7 pin P type CT 100 CT 150 models are intended mainly for Printed Circuit Board mounting of the transducer Mounting holes are present in all four versions of the device Installation and Operation CT 100 CT 150 Series User s Manual 2 Installation and Operation General considerations and description of pinout and functionalities are herein presented 2 1 Mechanical Considerations Each version of the CT 100 CT 150 current transducer presents an embossed arrow on the plastic part of the casing that indicates the verse of positive primary current measurement This arrow can be seen in Figure 3 top view of a CT 100 CT 150 mechanical enclosure Negative Current Positive Current Figure 3 embossed arrow indicating the verse of positive primary current The primary conductor hole dia
6. The transducers CT 100 CT 150 family has a transform ratio of 1 1000 CT 100 and 1 1500 CT 150 between primary and secondary External plastic casing guarantees galvanic isolation between the primary and the secondary circuits in order to allow to current measurements at a different potential and simplifies interfacing when using the Cas the feedback element of current regulated power supplies Output from the CT 100 CT 150 transducers can be chosen between two different versions standard secondary current output or buffered voltage output low temperature coefficient shunt resistor and low noise amplifier are embedded in the internal electronics in the V model Connections for power supply and output signals are available in two different versions the DB 9 connector C version and a 7 pin through hole strip P version Main characteristics of the entire Cres family are negligible temperature coefficient excellent linearity and extremely low noise DC current transformers and transducers represent the ideal replacement for systems where Hall effect sensors or shunt resistors are used as current sensing elements and better performances are needed The compact mechanical dimensions of this transducer series and 1ts limited weight as well as the DB 9 connector version allow easy mounting on printed circuit boards with a Through Hole TH topology for the P version and on racks for the C version Main applicati
7. ale primary current can be easily changed by carrying out multiple turns on the primary conductor hole The full scale current can then be scaled by a factor of N with N number of turns of the primary conductor around the hole S CT 100 CT 150 Series User s Manual Installation and Operation As an example in the CT 100 a primary current full scale of 50A and of 33 3A respectively is obtained by connecting primary conductor as shown in Figure 9 Using the same principle in the CT 150 a primary current full scale if 75A and of SOA respectively is obtained by connecting primary conductor as follows in Figure 9 Figure 9 Primary full scale current of 50A left and of 33 3A right in CT 100 or primary full scale current of 75A left and of 50A right in CT 150 Do not apply rated full scale primary current i e 100A for CT 100 and 150A for CT 150 when carrying out multiple turns on primary conductor hole 2 5 Secondary side Signals The signals on the secondary side of the CT 100 CT 150 series C version current transducers are found on pins 1 2 3 6 7 and 8 please note that not all of them are present on all versions of the DB 9 connector The same signals for the P version are found from pins 4 to 7 of the through hole 7 position strip 2 5 1 Power Supply Supply voltages for the CT 100 CT 150 series C version have to be fed to pin 9 15V and to pin 5 15V of the D sub 9 pin connec
8. ce for the V version models is 50 Q and it is low pass filtered with a 0 5 us time constant 2 5 4 STATUS Signal A STATUS signal obtained from the outputs of an optocoupler phototransistor Status and Status pins 8 and 3 on the C version and pins 4 and 5 on the P version respectively is present on all versions of the CT 100 CT 150 Series Please note that the OK signal is not internally connected to the ground potential and can be connected to an external reference potential A green LED is also present on the front side of the DCCT indicating the correct operation of the devices A pull up resistor is needed between the OK and some supply voltage referred to the OK potential in order to correctly obtained the correct signaling Two examples on how to connect the OK and OK signals are hereafter presented in Error Reference source not found and in Figure 11 DGND Figure 11 OUT OK signals connections as digital interfacing to 3 3V Q Installation and Operation CT 100 CT 150 Series User s Manual Note that the connection scheme presented in Figure 10 is referred to the GND potential and the OK_SIGNAL is at low level lt 0 4V if the CT 100 CT 150 Series transducer is correctly working while it is at high level gt 14 5V when the transducer is not In the configuration presented in Figure 11 the current transducer can be easily interfaced to a digital microcontroller a Digital Signal Proce
9. cececceccccecccecscececcececesceeaceecusescecescncteces 24 MECHANICAL DIMENSIONS eeooosevsevsesevsevsevevnsvneveenevnereeneen NAI 26 5 1 GP CT 150 S REN VER ION 26 5 2 men CT 150 PVR MH 27 CT 100 CT 150 Series User s Manual Date Comment June 9 2014 November 3 2014 Manual graphics changed CT 100 CT 150 Series User s Manual Safety information Warnings CAEN ELS will repair or replace any product within the guarantee period if the Guarantor declares that the product is defective due to workmanship or materials and has not been caused by mishandling negligence on behalf of the User accident or any abnormal conditions or operations Please read carefully the manual before operating any part of the instrument Z WARNINGZ Do NOT open the boxes CAEN ELS d o o declines all responsibility for damages or injuries caused by an improper use of the Modules due to negligence on behalf of the User It is strongly recommended to read thoroughly this User s Manual before any kind of operation CAEN ELS d o o reserves the right to change partially or entirely the contents of this Manual at any time and without giving any notice Disposal of the Product The product must never be dumped in the Municipal Waste Please check your local regulations for disposal of electronics products CT 100 CT 150 Series User s Manual PS1215 Power Supply Recommendations We strongly recommend using this product
10. d pin numbering to refer to is herein presented in Figure 5 Pin 1 Pin 7 Figure 5 7 pin Through Hole TH connections pin numbering The pinout for the P versions are presented in Table 3 These two versions have alternative current or voltage output signals and their respective returns on the same pins CT 100 P or CT 100V P or CT 150 P CT 150V P Current Output Voltage Output 1 GND DES o O 3 15V SE 5 Status 7 Is return Vout return Table 3 CT 100 CT 150 P versions pinout Please note that pins not internally connected on the specific model are indicated in Table 3 as nc not connected OB CT 100 CT 150 Series User s Manual Installation and Operation 2 2 Mounting The CT 100 CT 150 series current transducers can be mounted in different configurations depending on product models and versions The C versions are usually meant to be implied in rack mount applications by means of any of the two 2 different 4 hole patterns placed in different sides of the mechanical case Four holes are present on the bottom of the device as indicated in the following Figure 6 Mounting Mounti ounting Boles Holes Figure 6 Bottom mounting holes pattern Other four holes are present on the rear side of the CT 100 CT 150 series current transducer plastic cover and can be used in order to fix the device by means of self threading screws These holes are indicated in Figure 7
11. le cracks or breaks before each use e Do not operate the device around explosives gas vapor or dust e Always use the device with the cables provided e Turn off the device before establishing any connection e Do not operate the device with the cover removed or loosened e Do not install substitute parts or perform any unauthorized modification to the product e Return the product to the manufacturer for service and repair to ensure that safety features are maintained CAUTION e This instrument is designed for indoor use and in area with low condensation CT 100 CT 150 Series User s Manual The following table shows the general environmental requirements for a correct operation of the instrument Environmental Conditions Operating Temperature Operating Humidity Storage Temperature Storage Humidity Requirements 0 C to 45 C 30 to 85 RH non condensing 10 C to 60 C 5 to 90 RH non condensing CT 100 CT 150 User s Manual Introduction 1 Introduction This chapter describes the general characteristics and main features of the CT 100 CT 150 DC current transducer series 1 1 CT 100 CT 150 Series Overview The Cus O FLUx Current Sensor family is based on a closed loop technology that allows accurate and precise monitoring of DC and AC currents with high bandwidth The internal conductive casing guarantees higher noise immunity and reduces undesired noise pick up from external sources
12. meter in all models is rated at 16 mm about 5 8 As presented in the previous section two different models that differ by connector type are commercially available as well as different versions current or voltage output VI CT 100 CT 150 Series User s Manual Installation and Operation 2 1 1 C version and Pinout The CT 100 CT 150 series C models have a standard D sub 9 pin connector i e DE 9 or commonly referred to as DB 9 in both their current output and voltage output versions The standard pin numbering to refer to is herein presented in Figure 4 Pin 1 Pin 5 Pin 6 Pin 9 Figure 4 D sub 9 connector pin numbering The pinout for the C versions are presented in Table 2 These two versions have current or voltage output pins and their signal returns CT 100 C or CT 100V C or CT 150 C CT 150V C Current Output Voltage Output 1 Is return nc GND Status 15V Vour return op 9 15V Table 2 CT 100 CT 150 C versions pinout Please note that pins not internally connected on the specific model are indicated in Table 2 as nc not connected Please DO NOT connect pins indicated as Internal Use Q Installation and Operation CT 100 CT 150 Series User s Manual 2 1 2 P version and Pinout The CT 100 CT 150 series P models have 7 pin through hole connections in both their current output and voltage output versions The standar
13. on fields for these current transducers are precise and extremely stable regulated power supplies and power inverters OOo Introduction CT 100 CT 150 User s Manual Due to the excellent characteristics the O FLUCS transformers can be used in a variety of calibration acceptance testing and quality control applications in the industrial and automotive fields Front view of a CT 100 CT 150 current transducer in its DB 9 connector version is presented in Figure 1 DC Current Transducer out a og CT 100V C 31VC001 1 10 v a bosa NJE Figure 1 front view of a CT 100 CT 150 Cres current transducer with DB 9 connector C Rear view of the same current transducer where self threading holes for screws are visible is presented in Figure 2 Figure 2 rear view of a CT 100 CT 150 Cres current transducer with DB 9 connector C a CT 100 CT 150 User s Manual Introduction 1 2 CT 100 CT 150 Models and Versions The lt gt current transducer series CT 100 CT 150 is available in eight different versions that differ by the measurement range the connectors and the output type 1 e secondary current output standard or secondary voltage output V version The different models and versions of the CT 100 CT 150 series are summarized in the following table Table 1 Product Code Model Description WCT100CXAAAA CT 100 C 100 A Primary Current Ges DB 9 connector i CLucs 7 oi WCT
14. s The table and its graph are valid for both current and voltage output options CT 100 CT 150 Typical Equivalent Input Noise Bandwidth CT 100 CT 150 200 Hz 0 5 1 6 DEC EE RE HE 10 kHz Table 5 Equivalent Input Noise typical values Technical Specifications CT 100 CT 150 Series User s Manual Noise CT 100 Noise CT 150 Equivalent Input Noise ppm FS NO ND O 200 2000 20000 Bandwidth Hz Figure 13 Equivalent Input Noise graph typical values 4 2 External Shunt Resistor The maximum value of the external shunt resistor that can be connected on the Is output pin in the current output versions is shown hereafter in the following chart CT 100 300 285 270 255 240 225 210 195 180 165 150 135 120 105 90 75 60 z 45 Maximum Shunt Resistor Q 30 40 50 60 70 80 90 100 I mA Figure 14 CT 100 maximum external shunt resistor Current version only r CT 100 CT 150 Series User s Manual Technical Specifications CT 150 300 285 270 255 240 225 210 195 180 165 150 135 120 105 90 75 60 Maximum Shunt Resistor Q 30 40 50 60 70 80 90 100 I mA Figure 15 CT 150 maximum external shunt resistor Current version only I Mechanical Dimensions CT 100 CT 150 Series User s Manual 5 Mechanical Dimensions The mechanical dimensions of the CT 100 CT 150 Series DC Current Transducers are hereafter presented all dimensions are in mm
15. sformation Maximum RMS Primary Current IP RMS Maximum DC Secondary 100 mA Current Iscpc I Maximum RMS Secondary 71 mA Current Iscrms External Shunt Resistor 0 40 0 0 48 Q Value Rs Small Signal Bandwidth gt 500 kHz gt 300 kHz 3 dB typ BW gt 200 kHz V version gt 200 kHz V version Equivalent Input Noise lt 1 ppm FS 200Hz Bandwidth lt 10 ppm FS 50 kHz Output Voltage Output Voltage Gain u i 1 10 V A 1 15 V A V version Vour IP pc pen Up Current 15 mA V version I lt 0 5 ppm C Temperature Coefficient TC typ lt 2 ppm C V version lt 5 ppm Induction into Primary 0 100 kHz typ AUS Offset with factory Protection Signal OK Status Current Consumption 50 mA Is z e CT 100 CT 150 Series User s Manual Technical Specifications SEC D sub 9 connector C model 7 pin strip TH type P model Operating Temperature 0 C 50 C Range Connections Mechanical Outer Dimensions Primary Conductor Maximum Weight 250 g Table 4 Technical Specification 4 1 Equivalent Input Noise The typical equivalent input noise of the CT 100 CT 150 transducers is hereafter presented as a function of the measuring bandwidth and of the output version The connector topology does not affect the noise performances of the devices and the characterization is performed on the C connector version
16. sion pin 6 for the P is referred to Vo RET pin 7 on both C and EP options and the behavior is as follows e For CT 100 series 10V output if the primary current is 100A 1OV output if the primary current is 100A e For CT 150 series 10V output if the primary current is 150A JOV output if the primary current is 150A This behavior can be resumed in the gain parameter G in V A expressed as the ratio between the transducer output voltage Vy Vy rer and the primary current Ip G Vvo WoRET Ip This gain value is G 0 1 V A 100 mV A for the CT 100V versions and G 1 15 V A for the CT 150V versions Vo RET pin is not internally connected to ground GND pin 4 on C and pin 1 on P and it should be connected to ground directly using a single point connection e g on an external ADC ground pins or Vm pin The availability of this return signal is very useful in order to avoid additional ground loops and noise pickup on the voltage output version of the transducer Please note that the maximum differential voltage between the Vo RET and the GND pin has to be kept within 0 5V OOP CT 100 CT 150 Series User s Manual Installation and Operation VvoREr Venn lt 05V In the voltage output V versions of the transducers the current output pin Is pin 6 and its return pin 1 on C and pin 7 on P are not present Please note that output impedan
17. ssor or an FPGA supplied by a 3 3V voltage source Please note that the 3 3V supply and the OK_SIGNAL is referred to DGND potential which can be the same or different from the GND potential on which the CT device is supplied from The OK SIGNAL is found to be at low level lt 0 4V when the transducer is correctly working and at high level gt 3V when not Cu DC Current Transducer out ste Figure 12 STATUS OUT OK indications The OUT OK green light is on as shown in Figure 12 whenever the device is correctly working and regulating secondary output current i e zero flux is established and secondary circuit is closed on the shunt resistor external or internal in the V versions CT 100 Series User s Manual Ordering Options 3 Ordering Options The CT 100 CT 150 Series current transducers have different models and versions differing by the secondary output signal types and different connections The ordering code is formatted as follows gt gt NOTE fields characters shaded in grey color are fixed ie DC current transducer version CT ull scale measurabl JOA secondary voltage output and Technical Specifications CT 100 CT 150 Series User s Manual 4 Technical Specifications Technical Specifications for current transducers of the CT 100 CT 150 Series both current and voltage output versions are I erein presented Technical Specifications Ratio N Current Tran
18. tor both these voltages are referred to pin 4 GND and have a rated tolerance of 6 on the nominal values In the case of the P version the 15V have to be fed to pin 3 and the 15V to pin 2 they are both referred to the GND potential fed to pin 1 of the 7 position male connection strip Maximum current that can be drawn from each one of these supply voltages is of 150 mA I Installation and Operation CT 100 CT 150 Series User s Manual 2 5 2 Secondary Current On the standard CT 100 CT 150 Series versions the secondary current output Is scaled by the current transformation ratio 1 1000 for CT 100 or 1 1500 for CT 150 is fed to pin 6 in C option and to pin 6 in the P option Current return pins are respectively found on pin 1 and on pin 7 in the C and the P option Maximum secondary current is rated at 100 mA and an external shunt resistor which can be placed close to the user s desired measuring circuit is needed in order to convert the current signal to voltage The voltage output pins Vorand Vo RET cannot be found on standard current output versions 2 5 3 Voltage Output V versions only A buffered output voltage signal is present on the voltage output versions of the CT 100V CT 150V Series transducers in order to allow easier connection of the DCCT to an external circuit or an Analog to Digital converter The full scale output bipolar signal Vo pin 2 for C ver
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