General Description - Siemens SWT 3000 Equipment Manual

the outputs. This connection is routed via the module slots in the SWT 3000 system. If a module is removed or
not correctly installed, the power supply to the unit is disconnected.
Installation
The power supply connection must comply with the regulations in force in the particular country. Only the
socket connector must be used for the cabling. Other types of connection do not warrant compliance with the
safety regulations in every case. The units correspond to protection class 1. Installations in compliance with
protection class 2 require additional insulating access protection around the housing of the power supply.
NOTE
i
i
If the SWT 3000 is used in the PowerLink system (as iSWT) it is supplied via the central power supply of the
PowerLink.
It is neither required nor it is possible to use a separate power supply for the integrated unit.
NOTE
i
i
If an additional fuse is necessary, this fuse must be inserted in the incoming line to the pin 29 of the power
supply unit.

General Description

13.1.2
2 different power supplies are available for the SWT 3000 units:
Operating voltage:
Converter type:
50 W AC-DC/DC-DC converters are used.
The characters of these converters are:
•
Wide input voltage ranges
•
Efficient input filters
•
AC (RMS) 3 kV isolating voltage
•
Individually regulated outputs
Properties
High efficiency
Input/output and output/output electrically isolated
Wide input voltage ranges
Permanently proof against low load and short circuit
No reduction of load
Input undervoltage disconnection
Temperature monitoring
Closed metal case
The converters are versatile power supplies suitable for industrial use where high requirements apply.
The particular features of these devices are:
•
High efficiency, which remains practically constant over the entire input voltage range
•
Maximum reliability
•
Small residual ripple
•
Good dynamic control properties
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020
DC 24 V to 60 V
PSMM50 48T512
Benefits
Minimum heat development and low thermal rating
Safety in conformance with IEC 60950, VDE 0850
Use without matching to the supply voltage
Simple handling, optimum equipment self-protection
Full output power in spec. temperature range
No failures of the outputs
Over temperature protection through disconnection
Additional cooling not necessary
13.1 Functional Description
DC 110 V to 250 V
AC 115 V to 230 V
PSMM50 230T512
Power Supply
361