ABB SensyMaster FMT430 - Replacing the Fuse

SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B 139
Replacing the fuse
1
Fuse holder
Figure 76: Fuse holder position
There is a fuse in the transmitter housing.
Power supply transmitter
11 to 30 V DC
100 to 240 V AC
Rated current of fuse
1.25 A
0.8 A
Nominal voltage of fuse
250 V AC 250 V AC
Design
Device fuse 5 x 20 mm
Breaking capacity
1500 A at 250 V AC
Ordering number
3KQR000757U0100
3KQR000757U0200
Perform the following steps to replace the fuse:
1. Switch off the power supply.
2. Open the transmitter housing.
3. Pull out the defective fuse and insert a new fuse.
4. Closing the transmitter housing.
5. Switch on the power supply.
6. Check that the device is working correctly.
If the fuse blows again on activation, the device is defective and
must be replaced.