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High-Leg Delta Measurement Configuration

NI 9244

AI0

Phase A

Phase B

Phase C

Neutral

AI2

AI1

Neutral

NI 9244 Getting Started Guide

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© National Instruments

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Summary of Contents for 9244

Page 1: ...GETTING STARTED GUIDE NI 9244 3 AI 1 Neutral 400 Vrms L N 690 Vrms L L 24 Bit 50 kS s ch Simultaneous ...

Page 2: ... Refer to the documentation for each component in the system to determine the safety and EMC ratings for the entire system Safety Guidelines Operate the NI 9244 only as described in this document Caution Do not operate the NI 9244 in a manner not specified in this document Product misuse can result in a hazard You can compromise the safety protection built into the product if the product is damage...

Page 3: ...ltitude Continuous 400 Vrms Measurement Category III Up to 5 000 m altitude Continuous 400 Vrms Measurement Category II or 300 Vrms Measurement Category III Division 2 and Zone 2 hazardous locations applications Channel to earth ground 300 Vrms Measurement Category III Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system NI 9244...

Page 4: ...luding cables bus bars junction boxes switches socket outlets in the fixed installation and stationary motors with permanent connections to fixed installations Caution Do not connect the NI 9244 to signals or use for measurements within Measurement Category IV Safety Guidelines for Hazardous Voltages If hazardous voltages are connected to the device take the following precautions A hazardous volta...

Page 5: ...it to ensure that the terminals are not accessible Safety Guidelines for Hazardous Locations The NI 9244 is suitable for use in Class I Division 2 Groups A B C D T4 hazardous locations Class I Zone 2 AEx nA IIC T4 and Ex nA IIC T4 hazardous locations and nonhazardous locations only Follow these guidelines if you are installing the NI 9244 in a potentially explosive environment Not following these ...

Page 6: ...zardous Locations Use in Europe and Internationally The NI 9244 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO Certificate No 12 ATEX 1202658X and is IECEx UL 14 0089X certified Each NI 9244 is marked II 3G and is suitable for use in Zone 2 hazardous locations in ambient temperatures of 40 C Ta 70 C If you are using the NI 9244 in Gas Group IIC hazardous locations you must use the dev...

Page 7: ...Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC stated in the product specifications These requirements and limits provide reasonable protection against harmful interference when the product is operated in the intended operational electromagnetic environment This product is intended for use in industrial locations Ho...

Page 8: ...ditions for Marine Applications Some products are Lloyd s Register LR Type Approved for marine shipboard applications To verify Lloyd s Register certification for a product visit ni com certification and search for the LR certificate or look for the Lloyd s Register mark on the product Caution In order to meet the EMC requirements for marine applications install the product in a shielded enclosure...

Page 9: ...ns Operating temperature IEC 60068 2 1 IEC 60068 2 2 40 C to 70 C Operating humidity IEC 60068 2 78 10 RH to 90 RH noncondensing Pollution Degree 2 Maximum altitude 5 000 m Indoor use only Note Refer to the device datasheet on ni com manuals for complete specifications NI 9244 Getting Started Guide National Instruments 9 ...

Page 10: ...NI 9244 Pinout AI0 AI1 AI2 Neutral 0 1 2 3 10 ni com NI 9244 Getting Started Guide ...

Page 11: ...al Neutral Referenced single ended analog input connection Connecting Phase Measurements The NI 9244 accepts three phase and single phase measurement configuration Three Phase Measurement Configurations NI recommends the following three phase connection types NI 9244 Getting Started Guide National Instruments 11 ...

Page 12: ...4 Wire WYE Measurement Configuration NI 9244 AI0 Phase A Phase B Phase C Neutral Neutral AI2 AI1 12 ni com NI 9244 Getting Started Guide ...

Page 13: ...High Leg Delta Measurement Configuration NI 9244 AI0 Phase A Phase B Phase C Neutral AI2 AI1 Neutral NI 9244 Getting Started Guide National Instruments 13 ...

Page 14: ...3 Wire Delta Measurement Configuration NI 9244 AI0 Phase A Phase B Phase C AI2 AI1 14 ni com NI 9244 Getting Started Guide ...

Page 15: ...AI2 AI1 The 9244 cannot measure the entire tolerance range or high crest factor signals on 690 Vrms systems in this configuration Connecting Single Phase Measurement Configurations NI recommends the following single phase connection types NI 9244 Getting Started Guide National Instruments 15 ...

Page 16: ...3 Wire Measurement Split Phase Configuration NI 9244 AI0 Neutral AI1 2 Wire Measurement NI 9244 AI0 Neutral 16 ni com NI 9244 Getting Started Guide ...

Page 17: ...orrect NI recommends connecting the chassis to earth ground using the chassis grounding screw Refer to your chassis manual for information about connecting the chassis to earth ground High Vibration Application Connections If your application is subject to high vibration NI recommends that you follow these guidelines to protect connections to the NI 9244 Use ferrules to terminate wires to the deta...

Page 18: ...nector Backshell with the 4 terminal connector on the NI 9244 Complete the appropriate procedure for each wire gauge Installing the NI 9969 Using 12 AWG to 14 AWG Wire What to Use NI 9969 backshell 12 AWG to 14 AWG wire Smallest strain relief piece Screwdriver 18 ni com NI 9244 Getting Started Guide ...

Page 19: ...to Do 1 2 1 Route wires under the smallest strain relief piece 2 Secure the smallest strain relief piece and the backshell in place using captive screws NI 9244 Getting Started Guide National Instruments 19 ...

Page 20: ...Installing the NI 9969 Using 16 AWG Wire What to Use NI 9969 backshell 16 AWG wire Small and large strain relief pieces Screwdriver 20 ni com NI 9244 Getting Started Guide ...

Page 21: ...ief pieces with the small strain relief piece on top of the wires and the large strain relief piece underneath the wires 2 Secure the strain relief pieces and the backshell in place using captive screws NI 9244 Getting Started Guide National Instruments 21 ...

Page 22: ...Installing the NI 9969 Using 18 AWG to 24 AWG Wire What to Use NI 9969 backshell 18 AWG to 24 AWG wire Largest strain relief piece Screwdriver 22 ni com NI 9244 Getting Started Guide ...

Page 23: ... to Do 1 2 1 Route wires under the largest strain relief piece 2 Secure the largest strain relief piece and the backshell in place using captive screws NI 9244 Getting Started Guide National Instruments 23 ...

Page 24: ...ine to Earth AIx Neutral where AIx is the analog input channel reading Neutral is the Neutral channel reading Converting L N Measurements to L L To convert L N measurements to L L values calculate the voltage difference between the AI channels using your application software Refer to the following equation for an example of converting L N measurements to L L Phase A to Phase B Voltage AI0 AI1 24 n...

Page 25: ...where AI0 is the reading from Phase A AI1 is the reading from Phase B NI 9244 Getting Started Guide National Instruments 25 ...

Page 26: ...uals RELATED INFORMATION C Series Documentation Resources ni com info cseriesdoc Services ni com services Installs with the software NI 9244 Datasheet NI RIO Help LabVIEW FPGA Help NI 9244 Datasheet NI DAQmx Help LabVIEW Help 26 ni com NI 9244 Getting Started Guide ...

Page 27: ...oduct Product registration facilitates technical support and ensures that you receive important information updates from NI A Declaration of Conformity DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC f...

Page 28: ...roducts technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents You can find information about end user license agreements EULAs and third party legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com legal export compliance for the NI ...

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