Compact Electric CDMR-51 Manuel - Sayfa 6
Röleler Compact Electric CDMR-51 için çevrimiçi göz atın veya pdf Manuel indirin. Compact Electric CDMR-51 15 sayfaları. Digital line monitoring relay
Sayfayı YazdırLine Monitoring Relay CDMR-51
Attention: Operating in parallel with system requires undervoltage limits >= 70% Un (rated voltage) of at least
one undervoltage function, because frequency and phase shift functions are inhibited,
if all 3 voltages drop below 70% of Un.
Unbalance Ba> (Voltage Asymmetry )
The unbalance function is energized, if any difference between the 3 line voltages exceed the limit value. Depending on
star-type or delta connection selected, the corresponding voltages are monitored. Energizing is independent of absolut
voltage values and also active in the case of single or double total voltage failure. Blocking by the external input B is
possible (see chapter on page 7)
Frequency monitoring f<<, f<, f>, f>>
Frequency monitoring comprises all 3 lines but requires at least one line voltage >= 70% Un to be enabled. Energizing
is inhibited, if all line voltages drop below 70% Un. These functions may also be inhibited by the external blocking
input (see page 7).
Phase Shift PS>
Phase Shift (Vector surge) monitoring is carried out independently in each line. Tripping logic depends on the parameter
value in the menue "Phase Shift .. PS> \ Sensitivity..PS>":
1-phase:
Tripping is carried out if the Phase Shift setting value is exceeded in at least in one line (L1 or L2 or L3)
3-phase:
Tripping is only carried out if the Phase Shift setting value is exceeded in all three lines (L1 and L2 and L3)
simultaneously
Phase Shift energizing of a single line is inhibited, if the voltage of this line drops below 70% Un. Energizing is
further inhibited:
- for the selected "BlockingTime" after power-on (supply voltage)
- for the selected "BlockingTime" after rising of a line voltage (from failure) above 70% Un.
- by the external blocking input (After release of the blocking input, the "BlockingTime" is started and the function is still
inhibited until this time interval has passed).
The length of the PS> tripping signal is selectable in the menue "Phase Shift..PS> \ Pulsewidth... PS>"
Phase sequence SEQ
The phase sequence (L1-L2-L3) is checked once on the rising of all 3 line voltages above 60%Un or in the case of
power-on of the supply voltage. A wrong phase sequence forces the assigned relay(s) to be permanently in the alert
state. The display shows the message: "PHASE SEQUENCE L1-L2-L3 fault!"
Change of setting values
Refer to fig.3 and fig.4 for additional information.
Undervoltage U<
Stage1 K_2___<-
Trip Voltage U<
[ 23–300]
210V
Lock-out Nr.xxx
release?
yes<-
Enter Security-
Code....... 000
CDMR51e_man_A11.doc
/ User Manual
1. Starting from the standard line measuring values menue step through the main-menue
level with the keys
or
2. Branch to the detailed-menue chain with the "ENTER" key and step up / down with the
and
keys to the desired parameter menue. In the lower display line the setting range of the
parameter is put in brackets, the parameter value is displayed on the right.
3. Press the "M/V" key (switches
Now there may be two situations:
Case a) no security code is selected (Code = 000): A "release menue" (see left drawing) is
displayed, "xxx" is a self-incremented change-access counter. Confirm the change-access re-
lease with the ENTER key. (If you entered this menue inadvertently you may escape from the
menue with
or
key).
Case b ) Enter the security code: first the leftmost number flashes, set the correct value with
the
or
keys, press ENTER, now the mid-number flashed, proceed as just before, press
ENTER, now the rightmost number flashes, set the correct value and terminate with ENTER.
to the main menue of the desired function (e.g. U<).
keys from Menue scrolling to Value changing).
Page 6