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Technical
Section 9
Dimensions
Section 10
STI isolatable fuse carriers
Control and
circuit protection
5
Function
The STI isolatable fuse-carriers
b
provide overload and short-circuit protection
They are used for industrial applications requiring a high breaking capacity
b
They perform the isolation function and must not be used as switches
b
They can be equipped with an indicator light indicating blowing of the fuse
b
cartridge
Isolation of all poles is guaranteed for the
b
2P, 3P, and 3P+N versions during factory
assembly
The general purpose fuse
(gG fuse)
provides overload and short-circuit protection.
The fuse for motor application
(aM fuse)
only provides short-circuit protection. It is
used for protection of loads with a high peak current (motors, transformer primaries,
etc.)
Technical data
Compliance with standards:
b
STI : IEC EN 60947-3
v
v
Cartridges :
v
v
NF C 60-200, NF C 63-210 and IEC 60269-1/2
--
Véritas and Lloyd’s approved.
--
Operating frequency: 50/60 Hz.
b
Insulation voltage: 690 V.
b
Isolation with positive contact indication by tilting the fuse-carrier :
b
Captive fuse-carrier
v
v
Additional housing is provided for a spare fuse.
v
To be equiped with aM or gG (gL - gl) type fuse cartridge without striker, with or
b
without fuse blowing indicator:
Fuse cartridge type
Ith (A)
Pmax (W)
8.5 x 31
aM
10
3
gG
20
3
10.3 x 38
aM
25
3.5
gG
32
3.5
Pmax: maximum dissipated power per fuse cartridge.
Cartridge blowing signalling (option): by indicator light ON after blowing
b
Operating temperature: -20°C to +60°C
b
Storage temperature: -40°C to +80°C
b
Specific technical data STI 1P+N and 3P+N
Disconnection of the phase and neutral in the normal dimensions of the phase
b
(2 mod. of 9 mm)
Phase opening causes compulsory opening of the neutral
b
The phase opens before the neutral on isolation and closes after the neutral on
b
circuit closing
Part numbers
Fuse cartridges
STI fuse holder
Fuse
cartridge
type
Rating
(A)
Voltage
rating Ue
(V AC)
Short-circuit
current Isc
(kA)
Fuse cartridge
catalogue number
Network type
Terminal
types
aM gG aM gG 1P
1P+N
(1)
2P
3P
3P+N
(1)
1
2
N 1
2
3
4
1
2
3
4
1
2
5
6
3
4
1
2
5
6
N
8.5 x 31.5 2
400
20 20
15733 15767 15635
2 modules of
9 mm
15645
2 modules of
9 mm
15650
4 modules of
9 mm
15655
6 modules of
9 mm
15657
6 modules of
9 mm
Tunnel
terminals:
up to 10 mm
2
4
400
20 20
15734 15768
6
400
20 20
15735 15769
10
400
20 -
15737 -
10.3 x 38 2
500
120 120
15742 15775 15636
2 modules of
9 mm
15646
2 modules of
9 mm
15651
4 modules of
9 mm
15656
6 modules of
9 mm
15658
6 modules of
9 mm
Tunnel
terminals:
up to 10 mm
2
4
500
120 120
15743 15776
6
500
120 120
15744 15777
10
500
120 120
15746 15779
25
400
120 -
15750 -
(1) The neutral pole comes equipped with a locked tube.