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9410 series
Alarms and alerts
Alarms overview
Alarm types
Standard alarms
150
An alarm is the meter's means of notifying you when an alarm condition is detected,
such as an error or an event that falls outside of normal operating conditions.
You can configure your meter to generate and display high, medium and low priority
alarms when predefined events are detected in the meter's measured values or
operating states. Your meter also logs the alarm event information. Your meter comes
with many alarms. Some alarms are preconfigured, while others need to be configured
before your meter can generate alarms. Your meter's default alarms can be
customized, as needed, such as changing the priority. You can create custom alarms
using the advanced features of your meter.
Your meter has four types of alarms.
Type
Description
Setpoint
Setpoint alarms define an alarm by comparing the actual value of a parameter to a
(standard)
specified limit or range of values. These include measured voltage and current
values and calculated power quality values.
Some setpoint alarms use high-speed measurements for up to 1 millisecond
resolution.
Digital
Digital alarms define an alarm condition based on a digital input's on/off state.
Disturbance (sag/
Disturbance alarms define an alarm based on a measured sag or swell.
swell)
Unary
Unary alarms are not configurable, and generate an alarm based on the meter's
state, for example, the meter powering up.
Alarms have two states:
•
Active: the meter detects the alarm condition is met.
•
Historical: the alarm condition previously existed but the condition has since
returned to a non-alarm state.
See the ION reference, available from www.usa.siemens.com/pds, for more
information about Setpoint, Digital Input and Sag/Swell modules.
Standard alarms are setpoint-driven alarms monitor certain behaviors, events or
unwanted conditions in your electrical system.
Standard alarms have a detection rate equal to the 50/60 meter cycle, which is
nominally 1 second if the meter's frequency setting is configured to match the system
frequency (50 or 60 Hz).
Many of the standard alarms are three-phase alarms. Alarm setpoints are evaluated
for each of the three phases individually, but the alarm is reported as a single alarm.
The alarm pickup occurs when the first phase exceeds the alarm pickup magnitude for
the pickup time delay. The alarm is active as long as any phase remains in an alarm
state. The alarm dropout occurs when the last phase drops below the dropout
magnitude for the dropout time delay.
Alarms and alerts
7EN05-0336-03
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