CARLO GAVAZZI EM530 Manual De Usuario página 18

Essential information
Essential information
Alarms
Introduction
EM500 manages a measured variable alarm. To set the alarm, define:
• the variable to be monitored (VARIABLE)
• alarm activation threshold value (SET POINT 1)
• alarm deactivation threshold value (SET POINT 2)
• alarm activation delay (ACTIVATION DELAY)
Variables
The unit can monitor one of the following variables:
• system active power
• system apparent power
• system reactive power
• system power factor
• phase-neutral voltage (OR logic)
• phase-phase voltage (OR logic)
• current (OR logic)
Note: if you select a current or a voltage, the analyzer simultaneously monitors all the phases available in the set measurement
system and triggers the alarm when at least one of the phases is in alarm (OR logic)
Alarm types
Up alarm (Set point 1 ≥ Set point 2)
The alarm activates when the monitored variable exceeds the Set 1 value for a time equal to the activation delay (Delay) and
deactivates when the values drops below Set 2.
Down alarm (Set point 1 < Set point 2)
The alarm activates when the monitored variable drops below the Set 1 value for a time equal to the activation delay (Delay) and
deactivates when it exceeds Set 2.
18 EM530/EM540 - User manual | CARLO GAVAZZI Controls SpA
Set 1
Set 2
ON
Delay
Set 2
Set 1
ON
Delay
(s)
(s)