Schneider Electric PM850 Advanced Alarms, Advanced Alarm Groups, Advanced alarm features by model

63230-500-225A2	PowerLogicTM Series 800 Power Meter
3/2011	Chapter 6—Alarms

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.

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

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.

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