型號HKK-14
HKK-14直流電流變送器鴻泰順達產品生產工藝規范
HKK-14直流電流變送器鴻泰順達產品生產工藝規范
Verify that the correct polarity is observed as shown. The 4220/60 series are polarity protected, so damage
should not occur if connected in reverse polarity.
Insure that the total loop resistance (instrument plus wire) does not exceed 600 Ohms. Most commonly, an
instrument with a burden of 250 Ohms is chosen. If the total loop resistance is greater that 600 Ohms the
transducer will not function according to published specifications.
Choosing connection wire with 22 gauge conductors or larger will minimize connection resistance on most
applications. Twisted pair wire should be adequate for most applications but shielded/twisted pair wire with the
shield grounded at the instrumentation end may be required for the most severe environments. Refer to the
instrumentation installation manual for more details regarding interconnect requirements.
Verify that the output of the DC supply is at least 24 VDC, with a current rating of 20 ma or greater per
transmitter connected.
The output is calibrated to be proportional to the Average RMS of the current primary at 60 Hz. Signals from
devices such as SCR and variable speed drives will not produce an accurate indication of RMS current levels.
Multiple loop powered transducers may be attached to the same power supply. Attach one side of the power
supply common to all the transducers.
The first step in troubleshooting would be to check the voltage across all of the components in the loop. At no
load the voltage across the instrumentation will be its burden resistance times .004.
Transducers may be mounted in close proximity to each other without concern for magnetic interaction.
An external current transformer may be attached to the transducer for applications that require monitoring
current levels above 400 AAC.
全文概述
該資料介紹了CR4220/60系列電流變送器的使用方法。這些變送器通過自動調整其直流串聯電阻，以維持與通過變送器窗口的交流電流平均值成比例的直流電流。資料中詳細說明了如何連接和配置這些變送器，包括電源要求、連接電阻、校準和故障排除步驟。此外，還提到了適用于特定應用的環境要求，如使用屏蔽雙絞線。
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