National Instruments NI 9242 Скачать руководство пользователя страница 26 | Manualshive

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National Instruments NI 9242 Скачать руководство пользователя страница 26

transformer ratio to get readings that refer to the primary of the

potential transformers.

Tip

If using a 320:1 ratio potential transformer,

multiply the readings by 320.

Connection Guidelines

• You must use 2-wire ferrules to create a secure connection

when connecting more than one wire to a single terminal on

the NI 9242.

• Make sure that devices you connect to the NI 9242 are

compatible with the module specifications.

To ensure that measurements to chassis ground are correct, 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.

NI 9242 Getting Started Guide

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Содержание NI 9242

Страница 1: ...NI 9242...

Страница 2: ...GETTING STARTED GUIDE NI 9242 3 AI 1 Neutral 250 Vrms L N 400 Vrms L L 24 Bit 50 kS s ch Simultaneous...

Страница 3: ...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 9242 only as described in this document Cauti...

Страница 4: ...earth ground 250 Vrms Measurement Category III Measurement Category III is for measurements performed in the building installation at the distribution level This category refers to measurements on har...

Страница 5: ...qualified personnel adhering to local electrical standards Caution Do not mix hazardous voltage circuits and human accessible circuits on the same module Caution Ensure that devices and circuits conne...

Страница 6: ...idelines may result in serious injury or death Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not remove m...

Страница 7: ...42 in Gas Group IIC hazardous locations you must use the device in an NI chassis that has been evaluated as Ex nC IIC T4 Ex IIC T4 Ex nA IIC T4 or Ex nL IIC T4 equipment Caution The system shall only...

Страница 8: ...owever harmful interference may occur in some installations when the product is connected to a peripheral device or test object or if the product is used in residential or commercial areas To minimize...

Страница 9: ...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 with shielded and or...

Страница 10: ...s 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 t...

Страница 11: ...NI 9242 Pinout AI0 AI1 AI2 Neutral 0 1 2 3 10 ni com NI 9242 Getting Started Guide...

Страница 12: ...l Neutral Referenced single ended analog input connection Connecting Phase Measurements The NI 9242 accepts three phase and single phase measurement configuration Three Phase Measurement Configuration...

Страница 13: ...4 Wire WYE Measurement Configuration NI 9242 AI0 Phase A Phase B Phase C Neutral Neutral AI2 AI1 12 ni com NI 9242 Getting Started Guide...

Страница 14: ...High Leg Delta Measurement Configuration NI 9242 AI0 Phase A Phase B Phase C Neutral AI2 AI1 Neutral NI 9242 Getting Started Guide National Instruments 13...

Страница 15: ...3 Wire Delta Measurement Configuration NI 9242 AI0 Phase A Phase B Phase C AI2 AI1 14 ni com NI 9242 Getting Started Guide...

Страница 16: ...e C AI2 AI1 Corner grounded 2 wire delta measurement configurations support only standard service levels up to 240 Vrms L L Connecting Single Phase Measurement Configurations NI recommends the followi...

Страница 17: ...3 Wire Measurement Split Phase Configuration NI 9242 AI0 Neutral AI1 2 Wire Measurement NI 9242 AI0 Neutral 16 ni com NI 9242 Getting Started Guide...

Страница 18: ...Potential Transformer Connections The NI 9242 accepts the following potential transformer connections NI 9242 Getting Started Guide National Instruments 17...

Страница 19: ...4 Wire WYE to WYE Full AI0 AI1 AI2 N Phase A Phase B Phase C Neutral NI 9242 18 ni com NI 9242 Getting Started Guide...

Страница 20: ...ral to ground voltage through the bottom transformer You can use a lower ratio transformer due to the typically low voltages on the Neutral terminal Ensure that you scale each NI 9242 channel reading...

Страница 21: ...4 Wire WYE to WYE Partial AI0 AI1 AI2 N Phase A Phase B Phase C Neutral NI 9242 20 ni com NI 9242 Getting Started Guide...

Страница 22: ...Phase A Phase B Phase C NI 9242 Note You can use the Neutral channel for any other measurement if the measurement does not exceed the Neutral to Earth and L N input range NI 9242 Getting Started Guid...

Страница 23: ...Delta to WYE AI0 AI1 AI2 N Phase A Phase B Phase C NI 9242 22 ni com NI 9242 Getting Started Guide...

Страница 24: ...AI2 Phase A Phase B Phase C NI 9242 Note You can use the Neutral channel for any other measurement if the measurement does not exceed the Neutral to Earth and L N input range NI 9242 Getting Started G...

Страница 25: ...N Phase A Phase B Phase C NI 9242 Potential Transformer Ratio Scaling When measuring voltages using potential transformers scale the NI 9242 readings with your application software using the 24 ni com...

Страница 26: ...n connecting more than one wire to a single terminal on the NI 9242 Make sure that devices you connect to the NI 9242 are compatible with the module specifications To ensure that measurements to chass...

Страница 27: ...s close as possible to the isolated ground of the potential transformer Use the L N voltage measurements the NI 9242 returns as the default value Note You can convert L N measurements to channel to ea...

Страница 28: ...ackshell with the 4 terminal connector on the NI 9242 Complete the appropriate procedure for each wire gauge Installing the NI 9967 Using 12 AWG to 14 AWG Wire What to Use NI 9967 backshell 12 AWG to...

Страница 29: ...What 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 28 ni com NI 9242 Getting Started Guide...

Страница 30: ...Installing the NI 9967 Using 16 AWG Wire What to Use NI 9967 backshell 16 AWG wire Small and large strain relief pieces Screwdriver NI 9242 Getting Started Guide National Instruments 29...

Страница 31: ...in relief 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 captiv...

Страница 32: ...Installing the NI 9967 Using 18 AWG to 24 AWG Wire What to Use NI 9967 backshell 18 AWG to 24 AWG wire Largest strain relief piece Screwdriver NI 9242 Getting Started Guide National Instruments 31...

Страница 33: ...What 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 32 ni com NI 9242 Getting Started Guide...

Страница 34: ...surements to L L Phase A to Phase B Voltage AI0 AI1 where AI0 is the reading from Phase A AI1 is the reading from Phase B Converting L N Measurements to L Earth To convert L N measurements to L Earth...

Страница 35: ...where AIx is the analog input channel reading Neutral is the Neutral channel reading 34 ni com NI 9242 Getting Started Guide...

Страница 36: ...ATED INFORMATION C Series Documentation Resources ni com info cseriesdoc Services ni com services Installs with the software NI 9242 Datasheet NI RIO Help LabVIEW FPGA Help NI 9242 Datasheet NI DAQmx...

Страница 37: ...NI product 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 Co...

Страница 38: ...tes create your service request at ni com support or dial 1 866 ASK MYNI 275 6964 For telephone support outside the United States visit the Worldwide Offices section of ni com niglobal to access the b...

Страница 39: ...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 global trade compliance policy and how to obtain rel...

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