Carbolite BLF 18/21 - Manual (Page 15)

BLF
MF23 – 3.11
15
F USES & P OWER C ONTROL
8.5 Fuses
8.6 F1 to F3 - refer to the circuit diagrams
F1
Internal supply
fuses Fitted if supply cable fitted.
GEC Safeclip of the type shown
(glass type F up to 16A)
F2
Auxiliary
circuit fuses 2 Amps glass type F
32mm x 6mm
F3
Heat Light
fuses 2 Amps glass type F
32mm x 6mm
8.7 Thyristor
Fuse
Ferraz Protistor of the rating
shown
Customer
fuses Required if no supply cable fitted.
Recommended if cable fitted. See rating label for amperage; see
table below for fuse rating.
The table below gives the fuse rating for the various models.
8.8 Power Control
The setting for the power limit parameter in the controller ( OP.Hi ) should be 100% for all models.
The thyristor stacks are set to the secondary (element) maximum currents given in the table.
TABLE OF FUSE AND CURRENT LIMIT VALUES
Model Phases volts supply fuse
rating
type
thyristor
fuse
rating current
limit
(element
circuit)
BLF 17/3 1-phase 220-240V 30-32A NS32 50A 90A
BLF 18/3 1-phase 220-240V 30-32A NS32 50A 150A
BLF 17/8 3-phase+N 380/220-415/240V 16A glass 25A 82A
BLF 17/8 3-phase delta 208, 220-240V 30-32A NS32 25A 82A
BLF 18/8 3-phase+N 380/220-415/240V 16A glass 25A 150A
BLF 18/8 3-phase delta 208, 220-240V 30-32A NS32 25A 150A
BLF 17/21
BLF 18/21