18
LG 5925 / 26.02.18 en / 972
Arc limit curve under resistive load
Quadratic total current limit curve LG 5925; AC/DC 24 V
Quadratic total current limit curve LG 5925; AC 110 ... 115 V, AC 230 V
M8893_d
- current in contact paths
I , I , I , I
1
2
3
4
I = I + I + I + I
2
2
2
2
2
1
2
3
4
device mounted without distance heated by
devices with same load,
4 contact path = 4A = 4x1 A = 4A
Max. current at 55°C over
2 2
2
^
device mounted away from
heat generation components.
Max. current at 55°C over
4 contact path = 5A = 4x5 A = 100A
2 2
2
^
50
I
2
(A )
2
150
200
256
100
0
10
20
30
40
60
50
T ( C)
°
M9926
- current in contact paths
I , I , I , I
1
2
3
4
I = I + I + I + I
2
2
2
2
2
1
2
3
4
device mounted with 5mm distance
4 contact path = 1A = 4x1 A = 4A
Max. current at 55°C over
2 2
2
^
device mounted away from
heat generation components.
Max. current at 55°C over
4 contact path = 1A = 4x4 A = 64A
2 2
2
^
50
64
I
2
(A )
2
150
200
256
100
0
10
20
30
40
60
50
T ( C)
°
0
0,1
0,3 0,5
1
3
5
10
switching current A
50
100
150
250
200
sw
itc
hi
ng
vo
lta
ge
VD
C
M
58
34
_c
safe breaking, no continuous arcing,
max. 1 switching cycle / s
Failure
Potential cause
LED "Power" does not light up
- Power supply not connected
- Cross fault between S11 and S21
LED "K1" lights up,
but "K2" remains off
- Safety relay K1 is welded
(replace device)
- A 1-channel switch-off occurred on
S12 (switch channel off on S22)
LED "K2" lights up,
but "K1" remains off
- Safety relay K2 is welded
(replace device)
- A 1-channel switch-off occurred on
S22 (switch channel off on S12)
Device cannot be activated
Manual start mode:
- Line fault on start-button (disconnect
power supply and remove fault)
Automatic start mode:
- S33-S34 not bridged
- A safety relay is welded
(replace device)
- Incorrect setting of switch S1
- The device contains no parts that require maintenance.
- In case of failure, do not open the device but send it to manufacturer
for repair.
Troubleshooting
Characteristics
Characteristics
Maintenance and repairs
