Dedicated I/O For Input Protection - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Troubleshooting Faults and Alarms

11.13 Dedicated I/O for Input Protection

11.13 Dedicated I/O for Input Protection
Input Over-Voltage Fault
From Version 5.1.0 software onwards, this fault will create an Input Protection (IP) fault. It is
hard-coded to create the fault if the input line voltage exceeds 120%. This is only true for
dedicated I/O IP. SOP based IP must include the input over-
voltage, LineOverVoltageFault_I, fault in the IP logic.
Cell Based Protection Faults
Cells with the AP protocol may have additional cell-based IP sensing. Refer to the Operating
Instructions manual. These include:
• arc flash detection
• over-voltage with cell in bypass
• over-current with cell in bypass.
These are cell dependent. If the cells contain these faults, they too will trigger an IP fault.
SOP Triggered Input Protection
External events can be used to trigger an IP fault. This is accomplished through the use of the SOP
flag SetIPFault_O. Setting this true for any SOP logic statement will result in generating an IP
fault.
Transformer Over-Temperature and Loss of Cooling
The temperatures of all secondary windings are monitored using two series-connected sets of
thermal switches which are normally closed. The first set opens when the transformer
temperature is above the alarm 1 temperature, the second set opens when the transformer
temperature is above the alarm 2 temperature. Two outputs, one output corresponding to each
set, are read by the control logic. A Xfrmr Temperature Alarm 1 is issued when one or more alarm
1 switches open. A Xfrmr Temperature Alarm 2 is issued when one or more alarm 2 switches
open. When both these conditions exist for 30 seconds, a Xfrmr Over Temp Fault is generated
that causes the drive to trip.
A flow sensor monitors liquid coolant flow through the Water-cooled Drive. The implementation
and use of this sensor are application dependent. As a standard default, the alarm Loss of
Coolant Flow is issued whenever the detected coolant flow rate is below a pre-set level for a pre-
set time.
The SOP can be used to trip the input Medium Voltage Breaker when the conditions of Xfrmr
Temperature Alarm 1, Xfrmr Temperature Alarm 2, and Loss of Coolant Flow exist
simultaneously.
Dedicated I/O For Input Protection
For air-cooled 6SR4_0 or water-cooled 6SR325 drives, the NXGpro software controls the I/O
involved with input protection. No intervention is required for activating this usage other than
selecting one of these cell types.
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NXGPro+ Control Manual
Operating Manual, A5E50491925A