Internal Fuses; F Use Sizes And Fuse Replacement - Carbolite MRF 16 Installation & Operating Instructions Manual

MRF 16/22
13.5 Fuse sizes and fuse replacement
Access to fuses for the heating elements and supply to the microwave circuit is by removal
of the left side cover [See figure 13.31].
Power Phase
Supply Fuses
F1, F2, F3
208 -
3 x 40A
240V
3 Phase
14 x 51mm
Delta
Type GG
380 -
F1, F2, F3
415V
3 x 25A
3 Phase
plus
10 x 38mm
Neutral
Type GG
(STAR)
To access fuses F1 to F13 isolate the furnace from the electrical supply and remove the left
side cover. [See figure 13.1].
To access fuses F14 to F16 isolate the furnace from the power electrical power supply and
remove the right side access panel followed by the removal of the High Voltage Circuits
cover. Note that the High Voltage Circuit could have energy stored in the capacitors, so
ensure that they are discharged before replacing any fuses.
44

Internal Fuses

Aux Fuse Line Fuses
F4, F5 F6, F7
2 x 5A 2 x 25A
5 x 20mm 10 x 38mm
Type F Type GG
F4, F5
2 x 5A
N/A
5 x 20mm
Type F
Fig 14.2 Internal fuses
Thyristor Microwave
Fuses S.C.
F8, F9,
F14
F10, F11
4 x 30A 1 x 20A
10 x 38mm 10 x 38mm
Protistor Type GG
F8 F14
1 X 30A 1 x 20A
10 x 38mm 10 x 38mm
Protistor Type GG
HT Fuses
F15, F16
2 x HVF10
F15, F16
2 x HVF10
MF 55-GB 1.21