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Line Monitoring Relay  CDMR-61     /   User Manual 

 

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Attention:  Operating in parallel with system requires undervoltage limits  >= 70% Un (rated voltage) of at least  
                    one  undervoltage function, because frequency and vector surge functions are inhibited, 

 

                    if all 3 voltages drop below 70% of Un. 

 

 

Trip logic selection  for U< function:  
 

Selected by the Parameter   "U<  Trip Logik"  in the menue chain  "General Settings". 
  
"U< Trip Logic"   = OFF:  standard  single phase sensitivity,  function is already energized, if  the voltage of one line  
  

 

 

drops below the low-limit value. 

 
"U< Trip Logic     =  ON:    2-phase sensitiviy, function is only energized, if the voltage of at least 2 lines drop below the  
  

 

 

low-limit value.   

 

Voltage Asymmetry    Asy  

 

The voltage asymmetry function is energized, if  any difference between the 3 line voltages exceed the limit value.  De-
pendent 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) 
 

Phase Angle Asymmetrie    Psy  

 

This function monitores the deviation of the 3 phase angles  from 120° . It is energized, if  at least one phase angle  dif-
fers more that the setting value from 120°, e.g.  
Setting value = 4°,  Tripping at phase angles  <= 116°  or  >= 124°. 
 
This function requires "4-wire mains" configuration and correct phase sequence. The measured phase angle values are 
displayed in the "Line: Lxy-Angle " menue (see fig.3).  This function may be inhibited by the external blocking input (see 
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). 

 
Vector surge   Vs> 

 
Vector surge monitoring is carried out independently in each line.  Tripping execution depends on the logic combination 
selected in the menue "Vector Surge Vs> \ Trip Logic Vs>":  
 
Value  Logic 

 

Comment                                                                       . 

 
  1 

"L1        " 

tripping on Vs> in line L1  (independent of  L2 and  L3) 

  2 

"L2        " 

tripping on Vs> in line L2  (independent of  L1 and  L3) 

  3  

"L3        "  

tripping on Vs> in line L3  (independent of  L2 and  L3) 

  4 

"L1,L2,L3" 

tripping on Vs> in line L1 or L2 or L3     (inclusive "or") 

  5 

"L1+L2    " 

tripping on Vs> in line  L1 and L2   (independent of L3) 

  6 

"L1+L3    " 

tripping on Vs> in line  L1 and L3   (independent of L2) 

  7 

"L2+L3    " 

tripping on Vs> in line  L2 and L3   (independent of L1) 

  8 

"L1+L2+L3" 

Tripping on  Vs> in line  L1 and L2 and L3  (within two periods) 

  9 

"OFF       " 

Vs> tripping disabled 

 

Vector surge 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 Vs> tripping signal is selectable in the menue  "Vector Surge Vs> \ Pulsewidth... Vs>" 
 

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    

 

CDMR61e_man_A1.doc 

Summary of Contents for CDMR-61

Page 1: ...d negation of output relays 6 Security code 6 Realtime clock 7 Event history buffer 7 External blocking input B 7 Self monitoring 8 Serial interface 8 Menue diagram Fig 3 10 Front panel Fig 4 11 Table...

Page 2: ...rip delay 60 80 ms Ambient temperature range 20 C bis 60 C LCD display contrast 5 C bis 50 C Relay Contact Data Resistive Load see Fig 2 Max switching power 2000 VA 240 W Max switching voltage 250 V A...

Page 3: ...B HP HN Delta system 3 wire mains connecting diagram CDMR 61 CDMR 61 12 22 32 42 52 11 21 31 41 51 14 24 34 44 54 K1 K2 K3 K4 K5 Line Voltage UN Blocking Input Serial Interface Supply UH HN HP T G C R...

Page 4: ...The assignment can be configured in the detailed menue Output Relay U Undervoltage U Stage2 K1__4_ If no output relay is assigned to a monitoring function this function is disabled second displayline...

Page 5: ...l 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...

Page 6: ...inue by the ENTER key or key to the next menue by the key to the previous menue or by the keys pressed simultaneously branch to the line value menue menue reset Assignment of output relays to individu...

Page 7: ...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 buff...

Page 8: ...is kind elimination may be successful by entering the pa rameter value once again although the parameter value might be correct Parameter numbers 105 to 115 are used for internal scaling In this case...

Page 9: ...reen Select the menue Ansicht Informationen Messwerte The window shows the relay ID the line values and the state of K1 K5 as well as date and time all values are refreshed in 1s interval Download of...

Page 10: ...Line Monitoring Relay CDMR 61 User Manual Page 10 Fig 3 CDMR 61 MENUE DIAGRAM file menue1e cdr CDMR61e_man_A1 doc...

Page 11: ...Line Monitoring Relay CDMR 61 User Manual Page 11 CDMR61e_man_A1 doc...

Page 12: ...60 s 0 1s s 23 25 U Hysteresis 0 20 Un 3 Schaltpkt V 21 U Output Relay K1 K5 15 17 U TripVoltage 10 130 Un 80 Un V 19 U Trip Delay 0 04 60 s 0 1s s 20 U Return Delay 0 04 60 s 0 1s s 16 18 U Hysteres...

Page 13: ...Return Delay 0 06 60 s 0 12s s 30 f Hysteresis 0 5 00 Hz 0 05 Hz Hz 28 f Output Relay K1 K5 57 Vs Trip Angle 1 30 8 58 Vs Trip Logic 0 9 8 L1 L2 L3 61 Vs BlockingTime 1 20 s 5 s s 62 Vs Pulswidth 1 2...

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