Phase Failure Monitoring - Siemens SITOP PSU8600 Manual

Note
Carefully note that the battery module temperature can increase due to charging and buffer
operations, even at lower ambient temperatures. This can result in the charge power been
reduced or shut down as a result of the temperature monitoring inside the battery module.
Note
High ambient temperatures significantly reduce the service life of the batteries in the battery
module. As a consequence, to increase the service life, ensure that the battery modules are
installed at the coolest possible location in the control cabinet.
3.16.2

Phase failure monitoring

The basic unit has an integrated phase failure monitoring function. This prevents an
inadmissibly high load on the components in the input circuit of the basic unit as a result of a
phase failure of the line supply voltage.
Note
The reason for an unbalanced supply voltage can be line supply imbalance – as well as a
complete phase failure. This state is identified and signaled from an output power of
approximately 240 W for the 20 A basic unit - or approximately 480 W for the 40 A basic unit.
When a phase fails, the power supply system can be continually operated up to a maximum
output current of 10 A or 20 A without any restrictions.
Identifying a shutdown as a result of a phase failure
If the power supply is operated with an unbalanced supply, then this is signaled by a green
flashing LED "O.K."
10 min. for an unbalanced supply is exceeded, all of the outputs of the basic unit and the
expansion modules being used are shut down.
The following signals indicate a shutdown due to phase imbalance:
● Red LED "O.K."
● LEDs "ON/OFF/RST"
● Signaling contact at the basic unit
Power supply system SITOP PSU8600
Manual, 09.2018, A5E36758446-5-76
①
at the basic unit. If, at rated load, the permissible duration of approx.
①
at the basic unit and at the supplementary modules
②
of all outputs go dark
Operator control at the device
3.16 Monitoring functions
111