ABB CIRCUIT SHIELD 437W Series - Page 10

Reverse
Power
Relay
IB
7.8
.
1.7
-
1
Page
10
437
P
/
F
,
237
P
/
F
Series
Units
Operating
Characteristic
Figure
5
:
Current
-
Directional
L
.
o
z
2.0
VO
H
U
H
J
H
0
-
W
VO
H
H
J
W
3
2
1.5
H
z
H
Z
H
W
H
1.0
>
b
<
2
H
U
U
»
Q
W
0.5
U
z
u
H
*
H
H
0
10
11
12
13
14
9
8
6
7
5
3
4
2
1
MULTIPLES
OF
PICKUP
Timing
Characteristic
For
437
W
/
437
G
Series
Units
with
Timing
Selector
Link
in
the
INV
(
inverse
)
Position
.
Figure
6
:
Courtesy of NationalSwitchgear.com