ABB Arc Guard System TVOC-2 Installation And Maintenance Manual page 10

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)
10
1.7 Diagrams and layouts
1.7.1 Current Sensing Unit
Table 5
Current Sensing Unit
From another Current
Sensing Unit
V22
Red LED, switched on
when S1 is in test mode
S1
Test switch
Position 1: Test
Position 2: Operation
R29 Potentiometer for
simulating a test current
V29
Green LED switched
on for normal current
and switched off for
overcurrent
R21 Potentiometer for
overcurrent setting
V27 Yellow LED, switched
off at approx. 70% of
over-current level
S2
Operation condition
switch
Position 1: Input 9 is not used
Position 2: Input 9 is used
X15 Terminal pins for
X26
Choice of current range
Table 5
Current range
1A
2A
5A
ABB
CURRENT SENSING UNIT INSTALL ATION AND MAINTENANCE GUIDE
1
Layout diagram
Bridge connections
X24-X17, X25-X20, X26-X23
A)
X24-X16, X25-X19, X26-X22
R29 V22
X24-X15, X25-X18, X26-X21
B)
R21
10
1
To a Current Sensing Unit, Arc
Monitor, or Breaker Fault Unit
7
8
V29
V27
Layout diagram
S1
1
X)
2
23
22
21
S2
1 20
19
2
18
V27 V29 17
16
15
11 12 13 14
N
S2
S1
V22
12 10 11 13 14
-24V
*)
-60V
≅110 - 125V
*) 48 V DC with a wire
between 11 and 13
-220V, ∼230V
N L
9
8
7
1-2
26
6
5
25
4
3
24
2
1
A)
S1
R29 V22
1
2
B)
S2
1
2
9
To a Current S
Monitor, or Bre
1A
2A
S1 T1
1
5A
S2
2
1A
2A
S1
T2
3
7
5A
S2
4
1A
8
2A
S1 T3
5
5A
S2
6
V29
V27
12
-24V
N
X)
23
22
26
21
20
19
25
18