ABB RET 543 - Storing of Parameters and Recorded Data; Auxiliary Voltage; Power Supply Versions

1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
35
5.1.4.3. Storing of parameters and recorded data
When parameter values are changed, the new values take effect immediately.
However, the new parameter values as well as the recorded data are saved in a non-
volatile memory only after they have been stored via the parameter “Store” in the
menu Configuration/General (also refer to the Operator’s Manual) or via
the relay tools.
Provided the storing was completed successfully, the information stored in the non-
volatile memory is preserved in the memory also in case of a power interruption.
During the storing procedure, it is not possible to reset the transformer terminal via
the parameter “Software reset” or to load a new project.
When the values for the measuring devices (refer to sections “Scaling
the rated values of the protected unit for analog channels” and
“Technical data of the measuring devices” on page 40) are changed via
the HMI or the Relay Setting Tool, the new values take effect only after
they have been stored via the parameter “Store” and the transformer
terminal has been reset via the parameter “Software reset” in the menu
Configuration/General or by using the relay command buttons
“Store” and “Reset” in the Relay Download Tool.
The same applies for some communication parameters, i.e. the SPA baud rate, most
Modbus and DNP 3.0 parameters, the RTD data frame parameter of the IEC_103
protocol, the protocol selection parameters (Protocol 2 and Protocol 3 in the menu
Communication/General) and the command timeout parameter in the menu
Communication/General.
5.1.5. Auxiliary voltage
For its operation the RET 54_ terminal, including the external display module,
requires a secured auxiliary voltage supply. The transformer terminal’s internal
power supply module forms the voltages required by the transformer terminal
electronics. The power supply module is a galvanically isolated (flyback-type) DC/
DC converter. A green protection LED indicator on the front panel is lit when the
power supply module is in operation.
The main unit and the external display module must each be provided
with separate power supply from a common source.
The transformer terminal is equipped with a capacitor back-up system that enables
the internal clock to keep time for up to 48 hours in case of an auxiliary power
failure.
5.1.5.1. Power supply versions
There are two basic types of power supply modules available for the RET 54_
transformer terminals: type PS1/_ and type PS2/_. The module PS1/_ is used in RET
541 and RET 543 terminals. The module PS2/_ is intended for the RET 545
terminal. Both modules are available in two versions: PS1/48 V, PS1/240 V, PS2/48
V, PS2/240 V.
There are also differences in the threshold voltages of the power supply modules’
digital inputs. PS1/_ has three different alternatives for threshold voltage of the
binary inputs: low, medium and high version. The threshold voltage of the low
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