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Function diagrams
a) ON-delayed over- and undervoltage
monitoring, 1 x 2 c/o contacts
L1, L2, L3
> U
> U - 5 %
Measuring value
< U + 5 %
< U
t s
t v
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
t
= adjustable tripping delay
v
b) OFF-delayed over- and undervoltage
monitoring, 1 x 2 c/o contacts
L1, L2, L3
> U
> U - 5 %
Measuring value
< U + 5 %
< U
t s
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
t
= adjustable tripping delay
v
c) ON-delayed over- and undervoltage
monitoring, 2 x 1 c/o contact
L1, L2, L3
> U
> U - 5 %
Measuring value
< U + 5 %
< U
t s
t v
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
t
= adjustable tripping delay
v
d) OFF-delayed over- and undervoltage
monitoring, 2 x 1 c/o contact
L1, L2, L3
> U
> U - 5 %
Measuring value
< U + 5 %
< U
t s
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
t
= adjustable tripping delay
v
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e) ON-delayed
phase unbalance monitoring
L1, L2, L3
Unbalance
L3
Unbalance -Hyst.
Measuring value
L1, L2, L3 L1, L2
Unbalance +Hyst.
Unbalance
t s
t v
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
t
= adjustable tripping delay
v
f)
OFF-delayed
phase unbalance monitoring
L1, L2, L3
Unbalance
L3
Unbalance -Hyst.
Measuring value
L1, L2, L3 L1, L2
Unbalance +Hyst.
Unbalance
t s
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
t
= adjustable tripping delay
v
g) Phase sequence and phase failure monitoring
L1, L2, L3
Measuring value
L1, L2, L3
L1, L3, L2
t
s
15-18
15-16
25-28
25-26
F1: red LED
F2: red LED
R/T: yellow LED
t
= start-up delay fixed 200 ms
s
<t v
t v
t v
<t v
<t v
L1, L2, L3
L1, L2
L1, L2, L3
L1
L1, L2, L3
L3
L2, L3
7
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