Schneider Electric 4000 manual Alarms Groups, Alarms 63230-300-212 About Alarms April

Chapter 6—Alarms	63230-300-212
About Alarms	April 2001

ABOUT ALARMS

Alarms Groups

The circuit monitor can detect over 100 alarm conditions, including over or under conditions, digital input changes, phase unbalance conditions, and more. It also maintains a counter for each alarm to keep track of the total number of occurrences. A complete list of default alarm configurations are described in Table 6–3 on page 94. In addition, you can set up your own custom alarms and set up relays to operate on alarm conditions.

When one or more alarm conditions are true, the circuit monitor will execute a task automatically. Using SMS or the display, you can set up each alarm condition to perform these tasks:

•Force data log entries in up to 14 user-defined data log files. See Chapter 7—Loggingon page 99 for more about data logging.

•Perform event captures. See Chapter 8—Waveform and Event Capture on page 107 for more about event recording.

•Operate relays. Using SMS you can assign one or more relays to operate when an alarm condition is true. See the SMS online help for more about this topic.

Whether you are using a default alarm or creating a custom alarm, you first choose the alarm group that is appropriate for the application. Each alarm condition is assigned to one of these alarm groups:

•Standard—Standard alarms have a detection rate of 1 second and are useful for detecting conditions such as over current and under voltage. Up to 80 alarms can be set up in this alarm group

•High Speed—High speed alarms have a detection rate of 100 milliseconds and are useful for detecting voltage sags and swells lasting only a few cycles. Up to 20 alarms can be set up in this group.

•Disturbance—Disturbance alarms have a detection rate one cycle and are useful for detecting voltage sags and swells. Up to 20 alarms can be set up in this group. See Chapter 9—Disturbance Monitoring on page 113 for more about disturbance monitoring.

•Digital—Digital alarms are triggered by an exception such as the transition of a digital input or the end of an incremental energy interval. Up to 40 alarms can be set up in this group.

•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 15 alarms can be set up in this group.

Use either SMS or the display to set up any of the alarms.

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