micom p122
DESCRIPTION
P122TRANSCRIPT
-
Technical Guide P12x/EN Ta1/A44
MiCOM P120/P121/P122 & P123
APPENDIX 1Connection Diagrams
-
Technical Guide
P12x/EN Ta1/A
44C
onnection Diagram
sA
ppendix 1M
iCO
M P120/P121/P122 &
P123Page 1/2
APPEN
DIX
1
Auxiliaryvoltage
Programmableinput
Phase rotationC B
29
RS 485Port communication
CT shorting links make before (b) and (c) disconnect
(3) Earth terminals are typical only(2) CT connection are typical only
Nota :(1)
(c)
(a)
(b) Short terminals break before (c)
Long terminals
last relay to be connected( : terminating resistor for the*
30
32
*31
_
+
Case earth connection
Programmable output
Programmable trippingoutput
34
P120/121MiCOM
26
28
24
22
L2
L1
RL4
RL2
RL3
RL1
20
18
108
16
14
12
24
33+
_ 6
Module terminal blocks
(with integral case earth link)
viewed fromp rear
Case earth
Pins terminals (pcb type)(d)
Alternative : The earth current input is connected to the sommation of the three phase CTs.
C
A
B
S1S2
S2
P2 P1 P2 37
S1
P1
5 A
5 A
5 A
5 A
1 A
1 A
48
4746
4544
4342
4156
5554
5253
1 A
1 A5051
49
inputProgrammable
Programmable output
Programmable output
The current inputs are connected to 3 phase CTs + a core balanced CT.
between 30-32)
+
-+
-
(4) The MICOM P120/P121 relays are shown with supply off.
47
55
53
4951
37
45434139
3533
2931
48
56
545250
38
46444240
36343230
2423
27
25
28
26
21
2119
1517
13
2220
1618
14
7
911
53
8
1210
64
only
C
A
B
P2
S2 S1
P1
5 A
48
5 A
4746
4544
5 A
5 A
4342
4156
1 A
1 A
5554
5352
1 A51
1 A50
49
P121
onlyP121
P121
P121
A
Alternative (P121 only): Connection to 2 phases CTs + a core balanced CT.
B
C S2
AP2 P1 P2
S1
S2 S1
P1
41
5 A
5 A
4342
1 A
1 A
56
5554
1 A
1 A
5352
5150
49
45
48
5 A
5 A
4746
44
WD3635 Watch dog (4)
SCH
EME REPRESEN
TING
MiC
OM
RELAY O
FF
-
P12x/EN Ta1/A
44Technical G
uideA
ppendix 1C
onnection Diagram
sPage 2/2
MiC
OM
P120/P121/P122 & P123
SCH
EME REPRESEN
TING
MiC
OM
RELAY O
FF