Design; Circuit Diagrams - P&B MPR3E5 Manual

4. Design

4.1 Circuit Diagrams

L1
L2
L3
S2
P2
P1
S1
27
CBCT
28
Alternative E/F connection
for CBT
Fig 1 Connection Diagram for use with 3 line CT's and alternative core balance CT.
L1
L2
L3
S2
P2
P1
S1
CBCT
Fig 2 Special connection diagram when relay used with two line CT's.
14/1/98
Supply
1
21
I1
22
23
I2
24
25
I3
26
27
IE
28
Rstab
MPR 3E5
I E
Typical Earthing Shown
Supply
1
21
I1
22
23
I2
24
25
I3
26
27
IE
28
MPR 3E5
Note: Core Balance CT must
be provided if earth fault
protection is required
Typical Earthing Shown
18
2 CASE
CHASSIS
POWER
EARTH
SUPPLY
TRIP SIGNAL
ALARM
PROGRAMMABLE
RS485
-
+
Gnd
16 15 17
18
2 CASE
CHASSIS
POWER
EARTH
SUPPLY
TRIP SIGNAL
ALARM
PROGRAMMABLE
RS485
-
+
Gnd
16 15 17
Page 4
19
SPEED SWITCH
20
5
3
7
6
4
8
11
9
13
12
10
14
19
SPEED SWITCH
20
5
3
7
6
4
8
11
9
13
12
10
14
Issue H