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BLF
F
& P
USES
OWER
8.1
Fuses
F1 to F3 - refer to the circuit diagrams
F1
Internal supply
fuses
F2
Auxiliary
circuit fuses
F3
Heat Light
fuses
Thyristor Fuse
Customer
fuses
The table below gives the fuse rating for the various models.
8.2
Power Control
The setting for the power limit parameter in the controller (
The thyristor stacks are set to the secondary (element) maximum currents given in the table.
Model
Phases
BLF 17/3
1-phase
BLF 18/3
1-phase
BLF 17/8
3-phase+N
BLF 17/8
3-phase delta
BLF 18/8
3-phase+N
BLF 18/8
3-phase delta
BLF 17/21
BLF 18/21
16
C
ONTROL
Fitted if supply cable fitted.
Required if no supply cable fitted.
Recommended if cable fitted.
TABLE OF FUSE AND CURRENT LIMIT VALUES
volts
220-240V
220-240V
380/220-415/240V
208, 220-240V
380/220-415/240V
208, 220-240V
GEC Safeclip of the type shown
(glass type F up to 16A)
2 Amps glass type F
32mm x 6mm
2 Amps glass type F
32mm x 6mm
Ferraz Protistor of the rating
shown
See rating label for amperage; see
table below for fuse rating.
OP.Hi
) should be 100% for all models.
supply fuse
thyristor
rating
type
fuse
rating
30-32A NS32
50A
30-32A NS32
50A
16A
glass
25A
30-32A NS32
25A
16A
glass
25A
30-32A NS32
25A
current
limit
(element
circuit)
90A
150A
82A
82A
150A
150A
MF23
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