6RL SERIES OPERATION MANUAL
SECTION 3: PRODUCT OVERVIEW
Entire Contents Copyright
2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual
Page 21 of 204
3.6
Alarm Conditions
Note: This section only gives an overview of available unit alarms. What to do in case your
unit indicates an alarm condition is described in section 6.6, “Alarms and
Monitoring” on page 87.
In general, all alarm conditions are communicated visually (text + message in the display),
audibly (if activated) and as a readable status and alarm count via the digital interface. In
addition, the alarms OT and OVP are reported as signals on the analog interface. For later
inquiries, an alarm counter can be read from the display or via the digital interface.
3.6.1
Power Fail
Power Fail (PF) indicates an alarm condition, which may have several causes:
1.
AC input voltage too low (mains under voltage or mains failure)
2.
Defect in the input circuit (PFC)
As soon as a power fail occurs, the unit will cease to supply power and switch off the DC
Input. In case the power fail was due to an under voltage condition that disappears again,
the alarm will vanish from the display and no alarm acknowledgement is required to re-
enable the DC Input.
Note: Switching off the unit with the mains switch cannot be distinguished from a mains
blackout and thus the unit will signal a PF alarm every time the device is switched
off. This event can be ignored.
Note: The condition of the DC Input after a PF alarm can be determined from the MENU..
See section 6.4.3, “MENU System Overview” on page 61.
3.6.2
Over Temperature Protection
An over temperature alarm (OT) can occur from excessive temperature inside the unit which
will cause it to stop sinking power temporarily. This can occur due to a defect of the internal
fan regulation or due to excessive ambient temperature. Though the unit recovers most of
the absorbed energy with a high level of efficiency, it still requires some forced air cooling.
After cooling down, the device will automatically continue to work, while the condition of
the DC input remains and the alarm doesn’t have to be acknowledged.
3.6.3
Over Voltage Protection
An overvoltage alarm (OVP) will switch off the DC Input and can occur if:
The connected voltage source provides a higher voltage to the DC input than set in
the overvoltage alarm thresholds (OVP, 0...110% U
NOM
).
This function serves to warn the user of the electronic load audibly or visually that the
connected voltage source has generated an excessive voltage and thereby could damage or
even destroy the input circuit and other parts of the device.
Summary of Contents for 6RL Series
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