Line Monitoring Relay CDMR-61 / User Manual
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access to the change mode. The security code can be modified in the menue "General Settings \ Security code". Subse-
quent changing of the code is possible, but also in this case the active code has to be entered to get the permission for
changing.
Supply voltage
Usually a buffered DC voltage is used as supply voltage of the relay. For special applications any line voltage from 70V
AC to 300V AC /45Hz-65Hz (absolute minimum and maximum voltage) may be used, but attention has to be payed to
the fact, that all output relays are de-energized in case of total line failure and complete correct recording of the tripping
values in the event history buffer cannot be assured.
Realtime clock
The CDMR-61
is equipped with a
realtime clock with a supply-buffer of 60 hours minimum. The time resolution is 1s.
Date and time of the internal clock are displayed in a menue of the "General Settings" menue chain. The clock settings
may be changed in this menue as well as by the PC program.
Clock setting by menue: see chapter "Change of setting values". The first flashing value is the "day", it may be incre-
mented or decremented with
↑↓
keys, press ENTER key to step forward to "month" value and repeat procedure till "sec-
onds" value. After the last entry of the ENTER key flashing of seconds stops and the new date/time settings are trans-
ferred to the realtime clock.
Event History Buffer featuring 100 events capacity
If the relay detects a fault-free line conditions (none of the selected monitoring functions energized) for more than 200ms,
the event trigger logic is activated waiting for the first tripping event. This event is recorded with date and time and the
corresponding line measurement values at the tripping instant. Up to 100 events are stored chronologically. On exceed-
ing this number the oldest event is overwritten.
The content of the history buffer may be displayed on the LCD panel or via the serial interface by a PC program. The
complete information of one event is splitted in two menues. From the menu "Event Monitoring" press the ENTER key to
branch to the:
1. Event-Menue
Hnn = event-number (H = "History", 00 = newest event, 99 = oldest event
U<<< tripping function
H00: 28-05-2005
U<<< 13:48:16
To display previous events press M/V key, "Hnn" flashes, now the event number can be scrolled from 00 to 99, the cor-
responding event information ist instantly displayed. To check the measured values corresponding to any event,
press M/V key again to stop flashing then step to the 2. Event Menue menue with the
↓
key :
2. Event-Menue
H00: U<<<
005V 230V 216V
1. line: event number (same as in 1. Event-Menue) and tripping function
2. line: measured values at the instant of tripping
The procedure may be executed also vice versa: Select an event number in the 2. Event-Menue, stop flashing and return
to the 1. Event-Menue with the
↑
key to see date and time of this event.
Erasing the complete event history buffer:
In the menue "Event Monitoring \ H00-99 Erase" set the parameter value to 1. The erasing procedure takes about 30s.
Don't press any key during this procedure, cause it terminates the procedure in an incomplete state.
External blocking input "B"
Depending on the parameter value stored in the menue "General Settings \Ext. Blocking U,f" the external affects the
CDMR-61 operation as follows:
„Ext.Blocking U,f“ Action
0 ............
Blocking effect only to vector surge Vs>
1 ............ Blocking effect to Vs>, U<<<, U<<, U<, f<<, f<, f>, f>> and Asy
If blocking is released and a line fault present, tripping is performed after the time delay
programmed for the corresponding monitoring function.
CDMR61e_man_A1.doc
