User Manual

3UG4641 cos phi and active current monitoring relay
12.3 Functions
3UG4 / 3RR2 monitoring relays
284 Manual, 02/2013, NEB927043002000/RS-AA/002
Function diagrams 3UG4641 (cos phi monitoring)
Display Memory = no
Relay switching behavior = NC (closed-circuit
principle)
Memory = no
Relay switching behavior = NO (open-circuit
principle)
φ = off
>
φ
>
ϕ
11/14
11/12
21/24
21/22
Hyst, 0.10
onDel Del
PF = 0
cos ϕ = 0
ϕ
PF >
ϕ
11/14
11/12
21/24
21/22
Hyst, 0.10
onDel Del
PF = 0
cos ϕ = 0
ϕ
PF >
φ = off
>
φ
>
ϕ
11/14
11/12
21/24
21/22
Hyst, 0.10
onDel
Del
PF = 0
cos ϕ = 0
ϕ
PF <
ϕ
11/14
11/12
21/24
21/22
Hyst, 0.10
onDel
Del
PF = 0
cos ϕ = 0
ϕ
PF <
φ
>
φ
>
ϕ
ϕ
11/14
11/12
21/24
21/22
Hyst, 0.10
Hyst, 0.10
onDel
Del
Del
PF = 0
cos ϕ = 0
ϕ
PF >
ϕ
PF <
ϕ
ϕ
11/14
11/12
21/24
21/22
Hyst, 0.10
Hyst, 0.10
onDel
Del
Del
PF = 0
cos ϕ = 0
ϕ
PF >
ϕ
PF <
cos φ = currently set value for cos φ
PF = power factor = set threshold for cos φ