Bticino Megabreak T803LE1250, Maintenance Manual, Page: 53 / 76

Megabreak® - Maintenance guide
M
ain
tenanc
e guide
53
4.5 DWT - Draw-out system
Tools necessary:
Cross screw drivers
Allen key (hexagonal wrench) T4
Device for cluster contacts
Lubricant
4.5.1 DWT-I - Right working of draw-out system
• Check the correct working of draw-out system
- Insert the breaker in the draw-out chassis
- Get the breaker in inserted position – test position – drawout position
- For each position verify
it is possible close the draw-out shutter
it is possible to operate the breaker (close and open)
it is possible close and lock the shutter with padlock and (if present) keylock
close the breaker and verify it is not possible open the draw-out shutter
Check key lock if present (see MCSR-II)
- Get the breaker in middle (not definite) position and verify
it is NOT possible close the draw-out shutter
it is NOT possible to close the breaker.
it is NOT possible close and lock the shutter with padlock
Check key lock if present (see MCSR-II)
At the end get again the breaker in open position with springs discharged
discharged
charged
discharged
discharged
discharged
charged
discharged
discharged
In case of Inserted/test/draw-out contacts see the procedure “AXL”
TEST
Inserted
TEST
Test
TEST
Draw-out
TEST TEST
discharged
10
5
2
0.7
0.4
5
0.6
0.5
Ir
2
0.9
8
0.8
10
xIr
3 Im
6
4 5
s
xIn
0.1
0.0
0.01
20
5
10 @6Ir
30
tr
30
20
0.3
tm
0.2
0.3
0.2
0.1
I>1.0
5 I>.90
xIr
ON
N
0.00
0.02
0.04
0.06
0.08 0.1
I
2 t=k@12I
r
MEM=OFF
s
1
.
. 5
Ii
Icw
4
3
2
8
6
10
12
15
xIn
TEST
Inserted
TEST
Test
TEST
Draw-out
TEST TEST
discharged
10
5
2
0.7
0.4
5
0.6
0.5
Ir
2
0.9
8
0.8
10
xIr
3
Im
6
4 5
s
xIn
0.1
0.0
0.01
20
5
10 @6Ir
30
tr
30
20
0.3
tm
0.2
0.3
0.2
0.1
I>1.0
5 I>.90
xIr
ON
N
0.00
0.0
2
0.0
4
0.06
0.08
0.1
I
2
t=k@12I
r
MEM=OFF
s
1
.
.
5
Ii
Icw
4
3
2
8
6
10
12
15
xIn
TEST
Inserted
TEST
Test
TEST
Draw-out
TEST TEST
discharged
10
5
2
0.7
0.4
5
0.6
0.5
Ir
2
0.9
8
0.8
10
xIr
3 Im
6
4 5
s
xIn
0.1
0.0
0.01
20
5
10 @6Ir
30
tr
30
20
0.3
tm
0.2
0.3
0.2
0.1
I>1.0
5 I>.90
xIr
ON
N
0.00
0.0
2
0.0
4
0.06
0.08 0.1
I
2 t=k@12I
r
MEM=OFF
s
1
.
. 5
Ii
Icw
4
3
2
8
6
10
12
15
xIn
TEST
Inserted
TEST
Test
TEST
Draw-out
TEST TEST
discharged
10
5
2
0.7
0.4
5
0.6
0.5
Ir
2
0.9
8
0.8
10
xIr
3 Im
6
4 5
s
xIn
0.1
0.0
0.0
1
20
5
10 @6Ir
30
tr
30
20
0.3
tm
0.2
0.3
0.2
0.1
I>1.
05 I>.9
0
xIr
ON
N
0.00
0.0
2
0.0
4
0.06
0.08 0.1
I
2 t=k@12I
r
MEM=OFF
s
1
.
. 5
Ii
Icw
4
3
2
8
6
10
12
15
xIn
Draw-out shutter
keylock
Draw-out shutter
ref. 029040