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EPACK CONTROLLER: USER GUIDE
9.2.4 Over current detection
The analogue input over current detection alarm is active.
9.2.5 OverVoltage Alarm
An ‘OverVoltThreshold’ can be configured in the Network.Setup area of configuration (section 6.17.2) as a
percentage of VLineNominal. If the VLine voltage rises above this threshold the OverVoltage alarm is set.
Note...This Alarm is returned FALSE if the MissingMains Alarm is set.
9.2.6 UnderVoltage Alarm
An ‘UnderVoltThreshold’ can be configured in the Network.Setup area of configuration (section 6.17.2) as
a percentage of VLineNominal. If the VLine voltage falls below this threshold the UnderVoltage alarm is set.
Note...This Alarm is returned FALSE if the MissingMains Alarm is set.
9.2.7 Partial Load Failure (PLF)
This alarm detects a static increase in load impedance by comparing the reference load impedance (as
configured by the user) with the actual measured load impedance over a mains cycle (for phase angle firing)
and over the burst period (for burst and logic firing).
The sensitivity of the partial load failure measurement can be set to any value between 2 to 6 inclusive, where
an entry of 2, for example, means that one half of the elements (or more) must be open circuit in order to
trigger the alarm; an entry of 3 means that one third of the elements (or more) must be open circuit in order
to trigger the alarm, and so on down to one sixth. All elements must have identical characteristics and
identical impedance values and must be connected in parallel).
The relevant parameters (PLFAdjustReq, and PLFSensitivity) are both to be found in Network.Setup, as
described in section 6.17.2.
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HA031414
Issue 1 Apr 13