Fuse switch-disconnectors
FUSE SWITCH-DISCONNECTORS SIZE 4a UP TO 1600 A
Fuse switch-disconnector LTL4a is intended for fuse-links
with blade contacts size 4a. It enables safe disconnection
of rated current and overcurrent according to utilization
category and operating voltage. Basic part is made of
glass reinforced polyester. The material is resistant both to
mechanical load and high temperature.
ƒ Transparent cover is made of self-extinguishing
ƒ
polycarbonate, and contains a mechanical interlock,
which protects the cover against undesirable opening
by dynamic forces arising at short-circuiting.
High breaking capacity.
Fuse switch-disconnectors 1250 and 1600 A
Product
code
In
[A]
Design
Connection
Weight
[kg]
Package
[pcs]
LTL4a-1x/9/1250
08213
1250
1-pole
1 x M16
5.600
1
LTL4a-1x/9/1600
14806
1600
1-pole
2 x M12
5.800
1
LTL4a-3x/9/1250
08211
1250
1 x M16
16.800
1
LTL4a-3x/9/1600
08714
1600
2 x M12
17.300
1
LTL4a-3x3/9/1250
07886
1250
1 x M16
17.700
1
LTL4a-3x3/9/1600
08212
1600
2 x M12
18.200
1
Type
3-pole, 1-pole
controlled
3-pole, 1-pole
controlled
3-pole, 3-pole
controlled
3-pole, 3-pole
controlled
Accessories
Description
Type
Signalling of front cover position, for LTL4a-3x...,
at closing the contacts 1 and 4 are closed (see the diagram for connection),
in case of 3-pole control, it is installed in the central pole.
For 1-pole control, the signalling is installed in each pole.
EMV-LTL4a
Product
code
Weight
[kg]
Package
[pcs]
10423
0.005
1
E33
Fuse switch-disconnectors
FUSE SWITCH-DISCONNECTORS SIZE 4a UP TO 1600 A
Parameters
Type
Rated operating voltage (a.c./d.c.)
Ue
Rated operating current
Utilization category
Ie
LTL4a…1250 A
LTL4a…1600 A
690 V
690 V
1250 A
500 V a.c.
690 V a.c.
Ith
Rated thermal current with disconnecting link
Rated frequency
Rated insulation voltage
Ith
fn
Ui
Rated conditional short-circuit current (rms)
Icc
Rated pulse withstand voltage
Rated short-time withstand current
Fuse-link size
Max. power losses of the fuse-link
Power losses at Ith without fuse-link
Electrical endurance
Mechanical endurance
Degree of protection from front side, built-in device,
cover closed (without measuring holes broken off )
Degree of protection from front side, built-in device,
cover opened or removed
Operating ambient temperature
Max. sea level
Pollution degree
Overvoltage category for 690 V a.c.
Seismic resistance according to VE ŠKODA
Torque
Uimp
Icw 1 s
500 V a.c.
690 V a.c.
7500 A
3750 A
1875 A
1250 A
1250 A/500 V a.c.
1000 A/690 V a.c.
1250 A
40 ÷ 60 Hz
800 V a.c.
Rated making and breaking capacity
Rated thermal current with fuse-link
1600 A
AC-22B
AC-21B
400 V a.c., cos φ = 0.35
500 V a.c., cos φ = 0.35
690 V a.c., cos φ = 0.35
220 V d.c., L/R = 15 ms
400 V a.c.
500 V a.c.
690 V a.c.
7500 A
3750 A
1875 A
1600 A
1600 A/500 V a.c.
1000 A/690 V a.c.
1600 A
40 ÷ 60 Hz
800 V a.c.
120 kA
80 kA
50 kA
8 kV
30 kA
4a
110 W
67 W
200
1000
8 kV
35 kA
4a
164 W
67 W
200
1000
IP 20
IP 20
IP 10
IP 10
- 25÷ + 55 °C
2000 m
3
IV
3 g/8 ÷ 50 Hz
50 ÷ 60 Nm
IEC 60947-1, -3
EN 60947-1, -3
- 25 ÷ + 55 °C
2000 m
3
IV
3 g/8 ÷ 50 Hz
35 ÷ 40 Nm
IEC 60947-1, -3
EN 60947-1, -3
Pv
Pv
operating cycles
operating cycles
Standards
AC-22B
AC-21B
Approval marks
EN 60947-3 ed. 2/A2, p. C.5 Instructions for the use of 1-pole controlled devices states:
These devices are intended for distribution systems, with possible necessity of switching and/or safe disconnection of individual phases, and must not be used for switching a primary circuit of a three-phase equipment.
Dimensions
217,5
108
301
324
332
108
270
205
26
85
108
116
6
185
115
EMV-LTL4a
338,5
350
346
338,5
350
346
80
312
339
96
M16 x 60
40
13
154,5
445
E34
Fuse switch-disconnectors
FUSE SWITCH-DISCONNECTORS SIZE 4a UP TO 1600 A
Dimensions
Drilling diagrams
Terminals of switch-disconnector
1–pole
3–pole
45
7
7
25
22
14
22.5
216
9
13
67
25
55
25
30
25
14
250
22
18
50
50
In = 1250A
In = 1600A
Clearance
1–pole
328
328
3–pole
172.5
30
13
45
9
325
109
Remote signalling of cover position of 1-pole and 3-pole switch-disconnectors
State of contacts with closed cover:
contacts 1 – 4 closed
1
4
5 A/250 V a.c.
0.2 A/250 V d.c.
2
E35