型号HKK-14
HKK-14直流电流变送器鸿泰顺达产品生产工艺规范
HKK-14直流电流变送器鸿泰顺达产品生产工艺规范
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
该资料介绍了CR4220/60系列电流变送器的使用方法。这些变送器通过自动调整其直流串联电阻，以维持与通过变送器窗口的交流电流平均值成比例的直流电流。资料中详细说明了如何连接和配置这些变送器，包括电源要求、连接电阻、校准和故障排除步骤。此外，还提到了适用于特定应用的环境要求，如使用屏蔽双绞线。
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