Kamstrup 162M, Техническое описание

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TECHNICAL DESCRIPTION Kamstrup 162M/382M
5512-1040 GB/05.2012/Rev. C1
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In Figure 10 to the left, the yellow areas indicate when the neutral fault will detected.
Figure 10 to the right shows a situation where the neutral fault is detected, where the conditions are:
VL1 < VLLoTh
VL2 > VLHiTh
VL3 > VLHiTh
The parameters VNTh, VLHiTh and Time can be configured with the registers: (shown with default values)
NeutralFaultVNTh = 40 VAC
NeutralFaultVLHiTh = 253 VAC
NeutralFaultTime = 60 s
Under some conditions a neutral fault is not detected. In Figure 10, fault is not detected in the white areas.
In conditions with symmetric load the neutral fault voltage VN will theoretically be zero volts and neutral fault will
not be detected, even if the neutral is missing. Table 8 lists the parameters that are logged in the neutral fault
logger.
Various Event registers
Date and time Neutral Fault
Hour counter
Table 8: Neutral fault detection parameters.
The Neutral Fault Logger has a depth of 45 loggings.