18
BG 5925 / 02.05.17 en / 851
Arc limit curve under resistive load
Quadratic total current limit curve
Contact service life
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
_b
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
M8931_a
device mounted on distance with air circulation.
max. current at 55°C over
3 contactrows = 4A
3x4 A =48A
2
2
2
device mounted without distance heated by
devices with same load,
max current at 55°C over
3 contactrows = 1A 3x1 A =3A
2
2
2
I = I + I + I
2
2
2
2
I , I , I - current in contactrows
1
1
2
3
2
3
15
I
2
(A )
2
45
60
75
30
0
10
20
30
40
60
50
T ( C)
°
48A
2
0
1
2
3
4
5
6
7
8
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
switching
cycles
x10
6
M5783
switching current I [A]
electric life DC13 24V DC / ton 0,4s; toff 9,6s
2 contacts in series
Summary of Contents for SAFEMASTER BG 5925 Series
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