TECHNICAL DESCRIPTION Kamstrup 162M/382M
5512-1040 GB/05.2012/Rev. C1
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3.6.7 Event logger for voltage quality
Voltage failures are possible on one or two independent phases or on all three phases. The lmeter registers
voltage failures that last longer than minimum 1 second. No matter how many phases the voltage failure applies
to, the time of the voltage dropout will be registrered, and it will also be registered when the voltage returns, as
described in Figure 6. The logger stores the phases that the failure applies to and during which period.
Voltage failure is defined as voltage below 160 VAC 5 %. The voltage failure logger has a depth of 200 loggings.
3.6.8 Event logger for the load profile logger
The logger registers all changes in the legal logger. A change in the configuration of the legal logger will, as
mentioned in a previous section, mean that all data in this legal logger are deleted. Therefore, every change in the
legal logger is registered with a timestamp. The event logger has a logging depth of 10 loggings.
3.6.9 Event logger for Cut off
A meter with breaker includes a logger that registers all events related to the disconnect functionality. For each
event, that be a disconnection, a release or a reconnection, the meter logs an ID, a timestamp, the disconnect
state (according to Figure 18) and the connection feedback.
3.6.10 Event logger for neutral fault
The logger registers errors in the supply network. The purpose with this logger is to register if the attached
electronic equipment is exposed to overvoltage, which can damage the equipment and/or cause injury to person
due to fire.
In meters with build in breakers, there is furthermore a possibility to switch off the supply out of the meter in case
of neutral fault detection.
Neutral fault detection only applies to the three-phase, 4-wire metertype.
Figure 8 illustrates when a missing or faulty neutral is detected.
Figure 8: Neutral fault detection.
This means it is only possible to detect missing or faulty neutral before the meter(marked green), not after the
meter(marked red).
The neutral fault detection is based on voltage measurements and voltage thresholds.
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