REF 542plus switchbay protection and control unit
Manual Part 3: Installation and Commissioning
1VTA100004-en DMS,2001-10-04
REF542
plus
: Installation and Commissioning
39 / 80
6 Troubleshooting
In this chapter you will find information on
Self test of the Central unit
Self test of the HMI
By means of the self test the proper function of the REF542
plus
can be checked. It is
to be recommended that the self test is done in uninstall condition of the REF542
plus
.
At least no connection to the primary system should be left. Beside that, the upgrade
the firmware will also be described.
6.1 Safety Information
If there is any doubt regarding the treatment of a message, please check with our
service representative.
6.2 Required devices and facilities
6.2.1 Sinusoidal generator
The generator must have the following features in case of using the analog inputs of
the REF542
plus
with current and voltage transformers:
Accuracy class:
0.5
Current output :
1 respective 5 A 50 Hz AC minimum
Voltage output:
100 V 50 Hz AC minimum
Voltage output:
2 VRMS 50 Hz AC
The generator must have the following features in case of using the analog inputs of
the REF542
plus
with current and voltage sensors:
Accuracy class:
0.5
Current output :
150 mV 50 Hz AC minimum
Voltage output:
2 VRMS 50 Hz AC minimum
6.2.2 Adjustable power supply
with the following features:
Voltage output:
30 – 240 V DC
Power :
500 VA
Accuracy class:
5, <12% ripple
6.2.3 Personal computer
The PC (usually laptop) must be provided with at least one RS232 port for serial
communication respectively data transfer. Two RS232 ports will give better operation
condition. Thereby, the following software must be installed:
• REF542
plus
official released configuration software (example V4B01)
• Tera Term Pro software
6.2.4 Tera Term Pro
Tera Term Pro is a freeware terminal program for communication between the PC
and the hardware of the REF542
plus
, the Central Unit or the HMI Local Control Unit,
