Micom P721, Техническое руководство

Страница: 301 / 334

Con
n
ec
tio
n
D
iag
ra
m
s
P72x/EN
CO/A11
MiCOM P7
21/P723
Page
1
/2
BEFO
RE C
A
RRYIN
G O
U
T ANY W
O
R
K
ON T
H
E EQUIPMENT,
THE USER
SHOULD
BE
FAMILIAR WITH T
H
E
CONTE
N
TS O
F
THE SAFE
TY GUIDE
SFTY/4LM/E11 OR L
A
TE
R ISSUE, OR
THE SAFET
Y
AND TE
CH
NIC
A
L D
A
T
A
SECTION OF
THE TECHNICAL M
A
NUAL
A
ND
ALS
O
THE R
A
TI
NGS O
N
TH
E
EQUIPMENT
RATI
N
G LA
BEL."
C
B
29
RS 485
Nota :
(1)
(c)
(a)
(b)
30
32
*
31
-
+
34
P721
MiCOM
26
28
24
22
L2
L1
RL4
RL2
RL3
RL1
20
18
10
8
16
14
12
2
4
33
+
-
6
(d)
+
-+
-
47
55
53
49
51
37
45
43
41
39
35
33
29
31
48
56
54
52
50
38
46
44
42
40
36
34
32
30
24 23
27
25
28
26
2 1
21
19
15
17
13
22
20
16
18
14
7
9
11
5
3
8
12
10
6
4
A
48
47
56
55
WD
36
35
37
Phase rotation
Auxiliary
voltage
Programmable input
Programmable input
Case earth
Module terminal blocks
viewed fromp rear
(with integral case earth link)
Watch dog (4)
Programmable tripping
output
Programmable output
Programmable output
Case earth connection
Port communication
( : Link terminals 30 and 32 if
the relay is connected at the
end of the RS485 bus )
CT shorting links make before (b)
Short terminals break before (c)
Long terminals
Pins terminals (pcb type)
(2) CT connection are typical only
(3) Earth terminals are typical only
(4) The MICOM P120/P121 relays are shown with supply off.
*
C
A
B
5 A
48
47
56
1 A
55
Alternative : Restricted Earth Fault Protection (Delta connection)
C
A
B
P791 stabilising resistors
Alternative : Restricted Earth Fault Protection ( Star connection)
P791
(-V)
Auxiliary voltage
Ctrl shorting relay
and (c) disconnect
5 A
1 A
P791
(-V)
Auxiliary voltage
Ctrl shorting relay
Auxiliary voltage
(+V)
R St.
R St.
P3955ENa
{
{
{
{
{
{
{
SCHEME REPRESEN
TING
MiC
O
M R
E
LAY
O
FF