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© 2011 Schneider Electric. All Rights Reserved.
63230-500-225A2 PowerLogic
TM
Series 800 Power Meter
3/2011 Chapter 6—Alarms
53
Advanced Alarms
This section describes the advanced alarm features found on the PM850 and the PM870.
For information about basic alarm features, see “Basic Alarms” on page 45.
Advanced Alarm Groups
In addition to the basic alarm groups (see “Basic Alarm Groups” on page 45), the
following advanced alarm groups are available.
• Boolean—Boolean alarms use Boolean logic to combine up to four enabled alarms.
You can choose from the Boolean logic operands: AND, NAND, OR, NOR, or XOR to
combine your alarms. Up to 10 alarms can be set up in this group.
• Disturbance (PM870)—Disturbance alarms have a detection rate of half a cycle and
are useful for detecting voltage sags and swells. The Power Meter comes configured
with 12 default voltage sag and swell alarms; current sag and swell alarms are available
by configuring custom alarms. Up to 12 disturbance alarms can be set up in this group.
For more information about disturbance monitoring, see Chapter 9—Disturbance
Monitoring (PM870) on page 65.
• Custom—The power meter has many pre-defined alarms, but you can also set up your
own custom alarms using PowerLogic software. For example, you may need to alarm
on a sag condition for current A. To create this type of custom alarm:
1. Select the appropriate alarm group (Disturbance in this case).
2. Delete any of the default alarms you are not using from the disturbance alarms
group (for example, Sag Vbc). The Add button should be available now.
3. Click Add, then select Disturbance, Sag, and Current A.
4. Give the alarm a name.
5. Save the custom alarm.
After creating a custom alarm, you can configure it by applying priorities, setting pickups
and dropouts (if applicable), and so forth.
PowerLogic software can be used to configure any of the advanced alarm types, but the
power meter display cannot be used. Also, use PowerLogic software to delete an alarm
and create a new alarm for evaluating other metered quantities.
Table 6 – 7: Advanced alarm features by model
Advanced Alarm Feature PM850 PM870
Boolean alarms 10 10
Disturbance alarms — 12
Alarm levels Yes Yes
Custom alarms Yes Yes