Normal operation L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on...
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Normal operation L1 L2 L3 N K1 K1 K2 K2 SIEMENS φ -> cos φ = PF Ires -> Active current onDEL -> Current on delay Mem ? -> Memory? NC -> Circuit principle 5,0A Lx Ly/ N IN ~ 90-690V 22 21 24 12 11 14 Ires 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 7580 M [Nm] 0 0,2 0,4 0,6 0,8 1,0 cos I [A] 5 10 15 20 0 25 nominal load I res OK L2 L1 L3 M ▼ M ▲
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Transcript of Normal operation L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on...
Normal operation
L1L2L3N
K1
K1
K2
K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
5,0A
Lx Ly/N IN~90-690V
22 21 24
12 11 14
Ires
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 7580 M [Nm]0
0,2
0,4
0,6
0,8
1,0cos I [A]
5
10
15
20
0
25
nominal load
Ires
OKL2L1 L3M ▼ M ▲
Normal operation
L1L2L3N
K1
K1
K2
K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
0,86
Lx Ly/N IN~90-690V
22 21 24
12 11 14
cosφ
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 7580 M [Nm]0
0,2
0,4
0,6
0,8
1,0cos I [A]
5
10
15
20
0
25
nominal load
Ires
OKL2L1 L3M ▼ M ▲
Underload, e.g. broken belt
L1L2L3N
K1
K1
K2
K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
cosφ
Lx Ly/N IN~90-690V
22 21 24
12 11 14
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 7580 M [Nm]0
0,2
0,4
0,6
0,8
1,0cos I [A]
5
10
15
20
0
25
underload
Ires
OKL2L1 L3M ▼ M ▲
Overload, e.g. blockage
L1L2L3N
K1
K1
K2
K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
Lx Ly/N IN~90-690V
22 21 24
12 11 14
Ires
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 7580 M [Nm]0
0,2
0,4
0,6
0,8
1,0cos I [A]
5
10
15
20
0
25
overload
Ires
OKL2L1 L3M ▼ M ▲
Cable break
L1L2L3N
K1 K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
Lx Ly/N IN~90-690V
22 21 24
12 11 14
current in remaining cables rises to keep up the torque
Ires
K1 K2
OKL2L1 L3M ▼ M ▲
Phase failure of L1
L2L3N
K1
K1
K2
K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
Lx Ly/N IN~90-690V
22 21 24
12 11 14
Loss of supply voltage
OKL2L1 L3M ▼ M ▲
Phase failure of L2
L1
L3N
K1 K2
K1 K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
Lx Ly/N IN~90-690V
22 21 24
12 11 14
cosφ
Phase shift of approx. +30° => cos φ rises
OKL2L1 L3M ▼ M ▲
Phase failure of L3
L1L2 N
K1 K2
K1 K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
Lx Ly/N IN~90-690V
22 21 24
12 11 14
cosφ
Phase shift of approx. -30° => cos φ falls
OKL2L1 L3M ▼ M ▲
Phase sequence
L1L3L2N
K1 K2
K1 K2
SIEMENS
φ -> cos φ = PF Ires
-> Active current onDEL
-> Current on delay Mem ?
-> Memory? NC
-> Circuit principle
Lx Ly/N IN~90-690V
22 21 24
12 11 14
cosφ
cos φ becomes (1 - cos φ)
OKL2L1 L3M ▼ M ▲
