Basic Operation - ABB CM-UFD.M31 Betriebs- Und Montageanleitung

Control inputs Y1-Y0, Y2-Y0
Both control inputs Y1-Y0 and Y2-Y0 are used as feedback contacts for the 2 switching devices of the section switch. The current status
of the switching devices is monitored by the grid feeding monitoring relay. The working principle of the control inputs can be configured
as "normally closed", "normally open", "auto detection" or completely "disabled". Please note that „normally" here refers to „good status"
of the grid, when all the monitored voltages and the frequency stay within the set threshold values and output relays R1 and R2 are
energized. A failure in the feedback loop has to be removed manually on the device.
Control input Y3-Y0
The function of control input Y3-Y0 can be configured as "remote trip", "suppress Y1", "suppress Y2", "suppress Y1/Y2" or "suppress
vector shift". Working principle of the control input can be configured as "normally open", "normally closed" or completely "disabled".
Error memory
The last 99 events that caused tripping of the grid feeding monitoring relay, as well as any interruption of the control supply voltage, will
be recorded by the device. The type of error as well as the time stamp is recorded in the internal error list, accessible via the menu "Error
memory". The list is stored in a non-volatile memory which can be reset by the user.
Test function
The test function can be used to simulate an error in the installation. This way, the delay times of the feedback loops can be determined. A
feedback loop includes the output relay, the corresponding switching device and the feedback contact.
The test function can be started by pressing the ESC button for 3 seconds. The output relays R1 and R2 de-energize immediately and the
CM-UFD.M31 gets feedback signals from the section switch through control inputs Y1-Y0 and Y2-Y0 respectively. The time intervals from
de-energizing both output relays to receiving both feedback signals is shown on the display. Return to the menu is realized by confirming
with the OK button.
Automatic reconnecting attempts
If an error occurs at feedback loop Y1-Y0 or Y2-Y0 (e.g. undervoltage release because of a lightning strike), 0...3 automatic reconnecting
attempts will be carried out, taking into account the switch-on conditions. Therefore a temporary feedback error has not to be handled
manually. The relevant error in the feedback loop is stored in the error list.
Password
Every CM-UFD.M31 is delivered with the same default password [0000] for protection of its settings. In order to protect the device from
unwanted changes, the password must be changed and the password protection must be enabled. With enabled password protection you
can view the parameters, modifications are only possible after having entered the password. If the input password is correct, the protection
will be disabled until you leave the menu. The parameters "language", "switch-off delay" and "contrast" are not password protected.

Basic operation

Back light of the display switches off automatically after an adjustable duration. With a dark display, press any button to light it up again.
The display switches off automatically after 1 hour. Press any button to switch it on again.
Measurement screen:
ESC > 3 s: Test function
Arrow buttons: next measurement display
OK: menu
Menu:
ESC: leave the menu/submenu
Arrow buttons: select the submenu/parameter, > 1 s scroll
OK: enter the submenu/parameter
Adjust parameters:
ESC: move to the previous digit or cancel the change, > 1 s cancel the change
Arrow buttons: change the parameter, > 1 s scroll
OK: move to the next digit or confirm the change, > 1 s confirm the change
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