Fuse switch-disconnectors
FUSE SWITCH-DISCONNECTORS LTL4a 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-disconnector 1250 and 1600 A
Product
code
In
[A]
Version
Connection
Weight
[kg]
Packing
[pcs]
LTL4a-1x/1250/8
08213
1250
1-pole
1 x M16
5.600
1
LTL4a-1x/1600/8
14806
1600
1-pole
2 x M12
5.800
1
LTL4a-3x/1250/8
08211
1250
1 x M16
16.800
1
LTL4a-3x/1600/8
08714
1600
2 x M12
17.300
1
LTL4a-3x3/1250/8
07886
1250
1 x M16
17.700
1
LTL4a-3x3/1600/8
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
E33
Fuse switch-disconnectors
FUSE SWITCHDISCONNECTORS LTL4a SIZE 4a UP TO 1600 A
Accessories
Description
Front cover position signalling, for LLT4a-3x...
at closing, 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.
Type
EMV-LTL4a
Special active contacts Q enable safe handling the fuse switch-disconnectors
under extreme conditions. It prevents the blade contacts getting in an
intermediate position between “MAKE” and “BREAK” positions. It allows load …/Q
disconnection in any state of the current circuit. (In order add “…/Q” after
the type reference.)
E34
Product
code
Weight
[kg]
Packing
[pcs]
10423
0.005
1
-
0.010
1
Fuse switch-disconnectors
FUSE SWITCHDISCONNECTORS LTL4a SIZE 4a UP TO 1600 A
Parameters
Type
Rated operating voltage
Ue
Rated operating current
Ie
LTL4a…1250A
LTL4a…1600A
690 V
690 V
1250 A
500 V a.c.
690 V a.c.
Utilization category
Ith
Thermal current with disconnecting link
Rated frequency
Rated insulation voltage
Ith
fn
Ui
Rated conditional short-circuit current
(rms)
Icc
400 V a.c.
500 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
750 V a.c.
Rated making and breaking capacity
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.
Rated impulse withstand voltage
Uimp
Rated short-time withstand current
Icw 1 s
Fuse-link size
Max. power losses of the fuse-link
Pv
Pv
Power losses at Ith without fuse-link
Electrical durability
operating cycles
Mechanical durability
operating cycles
Degree of protection from the front side, built-in device, cover closed
(without measuring holes broken off )
Degree of protection from the front side, built-in device,
cover open or removed
Operating ambient temperature
Altitude above sea level max.
Pollution degree
Overvoltage category for 690 V a.c.
Seismic resistance per VE ŠKODA
Torque
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
750 V a.c.
120 kA
80 kA
50 kA
8 kV
Standards
AC-21B
AC-21B
4a
110 W
67 W
200
1000
8 kV
30 kA
4a
164 W
67 W
200
1000
IP 20
IP 20
IP 20
IP 20
- 25÷ + 55 °C
2000 m
3
III
3 g/8 ÷ 50 Hz
50 ÷ 60 Nm
IEC 60947-1, -3
EN 60947-1, -3
- 25 ÷ + 55 °C
2000 m
3
III
3 g/8 ÷ 50 Hz
30 ÷ 45 Nm
IEC 60947-1, -3
EN 60947-1, -3
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
E35
Fuse switch-disconnectors
FUSE SWITCHDISCONNECTORS LTL4a SIZE 4a UP TO 1600 A
Dimensions
Drilling plans
Terminals switch-disconnectors
1 – pole
3 – pole
45
7
7
1 – pole
172.5
328
328
3 – pole
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
2
E36
5 A/250 V a.c.
0.2 A/250 V d.c.
22
22
18
Clearance
14
25
250
14
22.5
216
9
13
67
25
55
25
30
25
30
13
45
9
50
50
In = 1250A
In = 1600A