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Mains monitoring relay CDMR-62
U< Trip Logic = ON:
Voltage asymmetry
Asy
The asymmetry monitoring is triggered if at least one difference between the three star or triangular voltages exceeds
the set limit value (independent of the absolute voltage values, is also triggered, for example, in case of an individual
phase failure).
Phase Angle Asymmetry
Adjustable limit value = deviation from 120°
The angle asymmetry is triggered if one of the three phase angles deviates from 120° by more than the set degree value.
Example: Setting value = 4°, tripping at phase angles <= 116° and >=124°.
The Angel measurement is only possible for 4-wire grids and correct rotating fields. Therefore, the setting menus for Wsy
will not be displayed for 3-wire grid types. The current angles are displayed in the menu "Line: Lxy angle"
(see Fig. 3).
Frequency monitoring f<<, f<, f>, f>>
The frequency monitoring is performed for three phases and it is active as long as at least one phase exceeds 0.7Un.
The frequency triggering will be blocked if all phase voltages are below 0.7Un. The frequency triggering can selec-
tively also be blocked through input "B" (see section "External blockade input").
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>": (parameter value = 1 ... 9):
Value
Logic
1
"L1
"
2
"L2
"
3
"L3
"
4
"L1,L2,L3"
5
"L1+L2
"
6
"L1+L3
"
7
"L2+L3
"
8
"L1+L2+L3"
9
"OFF
"
The VS> excitation in an individual phase will be blocked if the phase voltage is below 0.7Un.
In addition, the Vs> triggering will be blocked for the set blockade time "t-Blockade Vs" if the auxiliary voltage is switched
on as well as if the measuring voltage will be connected. In addition, Vs> the triggering can be blocked externally (float-
ing contact) through the blockade input "B". After opening the contact, waiting for the blockade time "t-Blockade Vs"
expiration takes place until the monitoring is activated.
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 setup values
See also Fig. 3 and Fig. 4 Page 10 and 11
Undervoltage U<
Stage1 K_2___<-
Trip Voltage U<
[3– 82]
46.0V
CDMR62e_man_A1.doc
/ Operating instructions
2-phases insensitivity, U< triggering is only performed if at least two
phases undershoot the limit value.
Psy
Comment
tripping on Vs> in line L1 (independent of L2 and L3)
tripping on Vs> in line L2 (independent of L1 and L3)
tripping on Vs> in line L3 (independent of L2 and L3)
tripping on Vs> in line L1 or L2 or L3
tripping on Vs> in line L1 and L2 (independent of L3)
tripping on Vs> in line L1 and L3 (independent of L2)
tripping on Vs> in line L2 and L3 (independent of L1)
Tripping on Vs> in line L1 and L2 and L3 (within two periods)
Vs> tripping disabled
1. Select the main menu of the required switching stage (e.g. U<).
(Starting in the grid menu by pressing the "UP/DOWN" arrow buttons simultaneously)
2. Using the "ENTER" button browse through the detail menu of the switching stage until
the required parameter. The switching stage symbol is always located in the upper right
area of the display field. The setup a range is shown in brackets, the set value is displayed
in the right lower area.
(inclusive "or")
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