AEG THYRO-A - Setting Load Monitoring (Undercurrent Monitoring); (Only for

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4.3.7 Setting load monitoring (undercurrent monitoring)
(only for ...H RL1 and ...H RLP1)
This function enables a freely selectable absolute current limit to be
monitored. The value can be set using the R205 potentiometer or the
Thyro-Tool Family. During the configuration process via potentiometer
the monitoring value will be indicated at the analog output. This moni-
toring of absolute values is suitable for one or several load resistors set
up in parallel. Basically the effective value of the current measured is
continually compared with a configurable absolute current limit for un-
dercurrent. If it drops below this limit message is sent. In the case of
resistors set up in parallel, by setting the respective undercurrent limit
can be selected a partial load break.
• Set load monitoring on the potentiometer R205 LOAD FAULT. The de-
fault setting of this monitoring is OFF (=left stop of the potentiometer
R205).
A measuring instrument connected to the analog output can be used
as setting aid (see page 44, Potentiometer). If the actual value is fallen
below the set value, a message is sent (LED, by bus and fault signalling
relay K1).
NOTE
Remarks on settings / tables
- Settings over 90% and fewer than 10% not make sense. If
the load currents are considerably less than the nominal cur-
rents of the power controller, consider using a smaller power
controller.
- In operating mode VAR, monitoring is blocked for large con-
trol angles (for load with neutral conductor a>140°el., for load
without neutral conductor a>117°el.)
- The signalling delays can be up to 15 secs. in operating mode
VAR and up to 30 secs. in operating mode TAKT.
- Convert deviating values as a percentage. The set monitoring
value should always be an average of the value for load nomi-
nal current and the value after failure.