S>@
Set TM31.AO_char. x2 to 100.00 %.
S>@
Set TM31.AO_char. y2 to 10.000 V.
8.4.3
Monitoring functions and protective functions
The drive features hardware and software functions that protect it against faults and damage
caused by impermissible operating statuses or hardware malfunctions. The monitoring
elements provide internal microprocessor-controlled monitoring and remote device monitoring.
8.4.3.1
Insulation monitoring
The drive is operated in an ungrounded IT supply system. This means that the drive can
continue to operate if just one ground fault occurs.
Note
A second ground fault causes the drive to fail.
For safety reasons, it is necessary to detect such ground faults, in order to eliminate the risk
of electric shock on the drive. This is the reason why the drive is equipped with insulation
monitoring (A-Isometer) that continually monitors the insulation state of the drive including that
of the motor.
Only one A-Isometer can be connected to each live connected IT system. The A-Isometer
adjusts monitoring in line with the line discharge capacitance. The A-Isometer is connected
between the ungrounded line supply and the equipotential bonding conductor (PE).
For the duration of testing, disconnect the instrument cables of the A-Isometer when performing
any insulation or voltage testing on the power system.
Self-test
The A-Isometer performs an automatic self-test under the following conditions:
● When the insulation resistance of the line supply > 20 MΏ
● Every 24 hours when an output relay for the system error message has been preselected.
Terminal monitoring
The connections to mains and ground (PE) are monitored continuously. If the cables are
interrupted or not connected, or if their resistance is high, this is indicated on the LCD. In this
case, please check the terminal conductors immediately, as the insulation resistance is not
being measured properly.
Operation
8.4 Functions
SINAMICS SM150 6SL3845-7NN46-7AA0
142
Operating Instructions 04/2017
Summary of Contents for SINAMICS SM150
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Page 14: ...Table of contents SINAMICS SM150 6SL3845 7NN46 7AA0 14 Operating Instructions 04 2017 ...
Page 122: ...Start up SINAMICS SM150 6SL3845 7NN46 7AA0 122 Operating Instructions 04 2017 ...
Page 190: ...Maintenance 9 7 Repairs SINAMICS SM150 6SL3845 7NN46 7AA0 190 Operating Instructions 04 2017 ...
Page 192: ...Spare parts SINAMICS SM150 6SL3845 7NN46 7AA0 192 Operating Instructions 04 2017 ...
Page 196: ...Service Support SINAMICS SM150 6SL3845 7NN46 7AA0 196 Operating Instructions 04 2017 ...
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