LO-250 and LO-400 switch disconnectors rated up to 400 A
Construction
LO switch disconnectors consist of following main sets:
– the bottom equipped trunk into current (points of junction constants, moving and extinction chambers) tracks,
– the upper (the metal construction) equipped set into the independent (expressed by signs) drive and auxiliary points of junction 2NO +2NC.
Current circuits in main poles possess for two isolating pauses. The hand drive assures the instantaneous joining of points of junction aside from of the speed of the displacement of the lever of the drive. The enclosure and the disconnection of LO switch disconnectors takes place by means the lever of the drive to push with the rotary motion for the corner 90º whose the construction does not permit to qualify current state the switch disconnector. The real position of chattel (the state of the close or the opening) points of junction signalled is only a visible visual indicator from the side of the driving (the green colour ,,O” – the off-state, the red ,, I” – the state of the enclosure)
lever.
Application
LO switch disconnectors are designed for:
– making and breaking the current in alternative current circuits,
– installation inside of enclosed indoor switchgear operated in non-airconditioned compartments. LO can be used in various climate conditions, at the range of ambient temperatures Switch disconnectors fulfil PN-EN 60947-3 standard.
Ambient temperature: 263 ÷ 318 K (-10 ÷ +45 °C)
LO switch disconnectors consist of following main sets:
– the bottom equipped trunk into current (points of junction constants, moving and extinction chambers) tracks,
– the upper (the metal construction) equipped set into the independent (expressed by signs) drive and auxiliary points of junction 2NO +2NC.
Current circuits in main poles possess for two isolating pauses. The hand drive assures the instantaneous joining of points of junction aside from of the speed of the displacement of the lever of the drive. The enclosure and the disconnection of LO switch disconnectors takes place by means the lever of the drive to push with the rotary motion for the corner 90º whose the construction does not permit to qualify current state the switch disconnector. The real position of chattel (the state of the close or the opening) points of junction signalled is only a visible visual indicator from the side of the driving (the green colour ,,O” – the off-state, the red ,, I” – the state of the enclosure)
lever.
Application
LO switch disconnectors are designed for:
– making and breaking the current in alternative current circuits,
– installation inside of enclosed indoor switchgear operated in non-airconditioned compartments. LO can be used in various climate conditions, at the range of ambient temperatures Switch disconnectors fulfil PN-EN 60947-3 standard.
Ambient temperature: 263 ÷ 318 K (-10 ÷ +45 °C)
Product range
|
Type
|
Identifcation No
|
Item No. |
|
LO-250Z
|
R257 1022 TO
|
620-T03001 |
|
LO-250W
|
R257 1122 Tl
|
620-T04001 |
|
LO-400Z
|
R407 1022 TO
|
620-T01001 |
|
LO-400W
|
R407 1122 Tl
|
620-T02001 |
Ordering example
Switch disconnector rated 250 A
LO-250Z R257 1022 TO
Switch disconnector rated 400 A to montage on the plate
LO-400W R402 1122 T1
Technical data
|
Type
|
LO-250Z
|
LO-250W | LO-400Z | LO-400W | |||
|
Main contacts
|
|||||||
|
Rated
insulation voltage
|
Ui
|
[V]
|
690
|
||||
|
Rated insulation voltage
|
Ue
|
[V]
|
500
|
||||
|
Birth-mark percessive tension held out
|
U imp
|
[kV]
|
6
|
||||
|
Rated
continous current
|
AC21A, 500 V
|
Iu
|
[A]
|
250
|
400
|
||
|
Rated
switching current
|
Ie
|
[A]
|
30
|
||||
|
Rated current short-circuit
|
I cm
|
-
|
30
|
||||
|
Current od short-circuit
duration held out
|
0,5 s
|
Iew
|
[A]
|
15
|
|||
|
Contact life
|
AC21A, 500 V
|
|
[cycles]
|
6 000
|
3 000 | ||
|
Mechanical
durability
|
30 000
|
10 000 | |||||
|
Rated
frequency of switching
|
[h-1]
|
120
|
|||||
|
Number
of poles
|
-
|
3
|
|||||
|
Usage
category˙
|
-
|
AC-21A
|
|||||
|
Protection degree
|
-
|
IP00
|
|||||
|
Threads of
terminal screws
|
cross-section
|
-
|
M10
|
M12 | |||
|
protection
|
-
|
M10
|
M10 | ||||
|
Conn. conductors cross-sections
|
conductors with Terminal
|
[mm²]
|
120
|
240 | |||
|
bus-type conductor
|
[mm]
|
30
|
30 | ||||
|
Auxiliary
contacts 2z+2r
|
|||||||
|
Rated
insulation voltage
|
Ui
|
[V]
|
400
|
||||
|
Rated
continous current
|
Iu
|
[A]
|
10
|
||||
|
Rated
switching current
|
AC15 - 400 V
|
Ie
|
[A]
|
2,5
|
|||
|
DC13
|
[A]
|
0,16
|
|||||
|
Max Conn. conductors
cross-sections
|
[mm²]
|
2,5
|
|||||
|
Weight
|
[kg]
|
3
|
3,4 |
3,2
|
3,6 | ||
Wiring diagram
Dimensions
 |
 |
 |
P – mounting plate |
|
Type
|
A
|
B
|
|
LO-250Z
|
140
|
162
|
|
LO-250W
|
||
|
LO-400Z
|
154
|
181
|
|
LO-400W
|
 |
 |