‘Stanguard’ On-Load Changeover Switch
1
Compact switches available from 40A to 3150A. Frame Size Size0
2
Conforms to IS:13947 (P- 1&3) and IEC: 60947 (P- 1&3)
3
Flexibility of mounting - Horizontal or Vertical mode
4
Unique modular construction comprising of two load switch disconnectors
Stanguard On-Load Changeover Switch
per pole thereby resulting into faster quenching of arc. The load
and line can be connected on either side by virtue of isolation on
both the sides. The entire switching mechanism alongwith the fixed
and moving contact assembly are housed in a nylon 66 FR grade,
moulded frame/cover, having high dielectric strength & thermal
withstand capacity.
Stanguard Changeover Switch has unique modular construction.
The module comprises of two load switch disconnectors coupled
together and mechanically interlocked with a common outgoing
and operable by a single handle having I-O-II position.
The switching mechanism is quick make, quick break type
independent of the speed of the operation. There are four breaks
Features
•
•
•
•
•
•
Compact switches available from 40A to 3150A in 7 Frame Size.
Conforms to IS:13947 (P- 1&3) and IEC: 60947 (P- 1&3).
Suitable for AC-23A duty.
Unique modular construction comprising of two load switch
disconnectors.
No Load / Line restriction - the shorting link can be connected on
either side to facilitate interchangeability of line and load.
Flexibility of mounting - Horizontal or Vertical mode.
•
•
•
•
•
•
•
Separate Arcing and main contacts results in the enhanced life of
the switch.
Four breaks per pole resulting in foster quenching of the arc.
Arc chutes and arc barriers provided in all ratings.
Large terminal area suitable for AI / Cu cables and busbars.
Handle with door interlock and Padlock facility available.
Phase barriers provided between individual phases.
Auxiliary contact available for signalling & interlocking.
Range
Specification
40A to 3150A in a 7 frame size, AC 23A
IS : 13947-1 & 3 IEC : 60947-1 & 3
Execution
FP with advance neutral
94
Stanguard On-Load Changeover Switch
Construction
In position ‘II’ supply II is connected to the load and supply I is off.
STANGUARD On-Load Changeover switches comprise of two load
switch disconnectors which are coupled together and are mechanically
interlocked with a common outgoing. The operating mechanism is
front handle operated with three stable positions of 1- 0-11 where in
none of the positions, supply I and II are connected simultaneously.
Hence in none of the cases, supply I & II are connected simultaneously.
The contact mechanism is knife blade type having four sets of contacts
per pole on the moving carrier. The fixed contact terminals in each
phase have separate main and arcing contacts. The contact is first
made with the arcing contact and thereafter with the main contact.
During breaking, the arc formation is across the arcing contacts thereby
protecting the main contacts which result into enhanced life of switch.
In position ‘I’ supply I is connected to the load and supply II is off .
In position ‘0’ supply I& supply II are both disconnected from the load.
Contact mechanism
The moving contact mates with the fixed contact by slide movement
of the moving contact assembly. The contact is first made with the
arcing contact and thereafter with the main contact. During breaking,
the arc formation is across the arcing contacts thereby protecting the
main contacts which results into enhanced life of the switch. The arc
is effectively quenched & confined in arc barrier in each phase.The
switches can be mounted inside a panel either in horizontal or vertical
mode without any effect on the performance.
The contact mechanism is knife blade type with self cleaning
action during operation. The fixed contact terminals in each
phase have separate main and arcing contacts. The moving
contact assembly has four sets of contacts on moving carrier
and the entire assembly rests on three guides on moving carrier
itself, which assists in its true movement during making and
breaking.
95
Stanguard On-Load Changeover Switch
Application
Type of current
A.C.
D.C.
Utilization Category
Typical Application
Frequent operation
Infrequent operation
AC21A
AC21B
AC22A
AC22B
AC23A
AC23B
AC3
AC3
DC 21 A
DC21B
DC 22 A
DC22B
Switching of resistive loads including moderate overloads switching of
mixed resistive and inductive loads including moderate overloads (Shunt
motors)
DC 23 A
DC 23B
Switching of motor loads or other highly inductive loads (Series motors)
Switching of resistive loads including moderate overloads Switching of
mixed resistive and inductive loads including moderate overloads
Switching of motor loads or other highly inductive loads Squirrel cage
motor- starting, switching off motors during running
Technical information
Standard conformity
:
IS: 13947 (P- l &3) and IEC: 60947 (P- 1&3)
Rated operational voltage (Ue)
:
415V A.c.
Utilization category
:
AC-23A
No. of poles
:
4 poles (with advanced neutral)
Rated insulation voltage (Ui)
:
1000V
Temperature withstand Range (ambient)
:
–5 to 50°C
Rated Impulse with stand Voltage (Uimp)
:
10KV
Dielectric Strength at 50 Hz
:
5KV
96
Stanguard On-Load Changeover Switch
Technical information
Frame Size
Size 00
ISCNFO0080
ISCNFO0040
ISCNFO0063
A
40
63
80
100
Rated Operational Voltage Ue
V
4
415
4
415
4
415
4
415
Rated Insulation Voltage
V
1000
1000
1000
1000
Catalogue No.
Rated operated Current at 40°C
Ie
Nos. of Poles
Rated Impulse Voltage
Ui
Uimp.
Rated Frequency
ISCNFO0100
kV
8
8
8
8
Hz
50
50
50
50
Pollution Degree
3
3
3
Design temp./ Ambient Temp. Deg. C
40
40
40
3
40
Rated Thermal Current
A
40
63
80
100
Rated Enclosed Thermal Current
A
40
63
80
100
AC21A / B
A
40 / 40
63 / 63
80 / 80
100 / 100
AC22A / B
A
40 / 40
63 / 63
80 / 80
100 / 100
AC23A / B
Rated Motor Power 415 Vac
A
40 / 40
63 / 63
80 / 80
100 / 100
20
630
22.5
25
A
15
400
800
1000
A
320
504
640
800
80
80
80
80
40
63
80
100
5
5
5
5
Rated Current-ac 415V
KW
Making Capacity AC23A
415 V
Breaking Capacity AC23A
415 V
Conditional Short ckt current 415 V ac
Fuse ratings gG
kArms
A
Rated Short Time Withstand
Current for 1 Sec. rms value
kArms
Mechanical Endurance
Electrical Endurance
opers.
opers.
10000
10000
10000
10000
1500
1500
1500
1500
Min. Cu cable section
Sq.mm
10
16
25
35
Min. Al. cable section
Sq.mm
Terminal Bolt Size
Metric thread diameter x length
16
25
35
50
mm
Oveall Dimensions H X W X D
mm
Weight
Open Execution
In Enclosure
M6 X16
136.5 X 144 X 158
kg.
1.5
1.5
1.6
1.6
kg.
4.5
4.5
4.6
4.6
Stanguard change over, frame size ‘00’
Current Rating (A)
Open Execution Cat. No.
In Enclosure Cat. No.
40
ISCNFO0040
ISCNFE0040
63
ISCNFO0063
ISCNFE0063
80
ISCNFO0080
ISCNFE0080
100
ISCNFO0100
ISCNFE0100
97
Stanguard On-Load Changeover Switch
Technical information
Frame Size
Current Rating at 40°C, Ith
Size 0
A
Size 1
125
160
200
250
320
4
4
4
4
4
No. of Poles
Rated insulation voltage, Ui
V
1000
1000
1000
1000
1000
Rated operational voltage, Ue
V
415V
415V
415V
415V
415V
Dielectric strength, 50 Hz, Vim
KV
5
5
5
5
5
Rated impulse withstand voltage, Uimp
KV
10
10
10
10
12
Rated operational current, Ie
at 415V
at 500V
at 260V
at 440V
AC 21A/B
A
125/125
160/160
200/200
250/250
320/320
AC 22A/B
A
125/125
160/160
200/200
250/250
320/320
AC 23A/B
A
125/125
160/160
160/160
250/250
320/320
AC 21A/B
A
125/125
160/160
200/200
250/250
320/320
AC 22A/B
A
125/125
160/160
160/200
250/250
320/320
AC 23A/B
A
100/100
140/140
140/140
200/250
250/250
DC 21A/B
A
125/125
160/160
200/200
250/250
320/320
DC 22A/B
A
125/125
160/160
200/200
250/250
320/320
DC 23A/B
A
125/125
160/160
160/160
250/250
250/250
DC 21A/B
A
125/125
160/160
160/160
250/250
320/320
DC 22A/B
A
125/125
160/160
160/160
250/250
250/250
DC 23A/B
A
125*/125*
125*/125*
125*/125*
200*/200*
200*/200*
Rated making capacity Amp,415V AC23A, p.f.- 0.30
1250
1600
1600
2500
3200
Rated breaking capacity Amp,415V AC23A, p.f.- 0.30
1000
1280
1280
2000
2550
KW
55
55
100
132
160
Rated operational power
Rated Motor Power 4 15V, 3 Ø
Fuse protected short circuit withstand
Rated max. Current of gG fuses
A
125
160
200
250
320
Rated conditional short circuit current
Kapeak
80
80
80
80
80
Max. Allowed cut off current
Kapeak
18
18
22
27
33
Rated short time withstand current (1 sec.)
Kapeak
7.5
7.5
7.5
15
15
3000/600
3000/600
3000/600
1800/360
1800/360
Electrical Durability
No. of operating cycles AC-3A/B
Mechanical Durability
No. of no load operating cycles
30000
30000
30000
20000
20000
°C
–5 to 50
–5 to 50
–5 to 50
–5 to 50
–5 to 50
AI. Cab le/ Bus Bar cross section
mm2
70
95
150
240
240
Cu. Cable/B us Bar cross section
mm2
50
70
95
185
185
Open Execution
Kg
3.60
4.00
4.00
8.00
8.00
In Enclosure
Kg
8.60
9.00
9.20
17.50
17.50
Temperature withstand range (ambient)
Terminal connection
Weight
* 2 Pole in series, *** For ratings 630A &above Bus Bar Termination Recomended
98
Stanguard On-Load Changeover Switch
Size 2
Size 3
Size 4
Size 5
400
630
800
1000
1250
1600
2000
2500
3150
4
4
4
4
4
4
4
4
4
1000
1000
1000
1000
1000
1000
1000
1000
1000
415V
415V
415V
415V
415V
415V
415V
415V
415V
8
8
10
10
10
10
10
10
10
12
12
12
12
12
12
12
12
12
400/400
630/630
1000/1000
1250/1250
1600/1600
2000/2000
2500/2500
3150/3150
400/400
630/630
1000/1000
1250/1250
1600/1600
2000/2000
2500/2500
3150/3150
400/400
630/630
1000/1000
1250/1250
1250/1250
1250/1250
1250/1250
1250/1250
400/400
630/630
1000/1000
1250/1250
1600/1600
2000/2000
2500/2500
3150/3150
400/400
630/630
1000/1000
1000/1000
1250/1250
1250/1250
1600/1600
2000/2000
400/400
400/400
800/1000
800/1000
1000/1000
1000/1000
1000/1000
1000/1000
400/400
630/630
1000/1000
1250/1250
1600/1600
2000/2000
2500/2500
3150/3150
400/400
630/630
1000/1000
1250/1250
1250/1250
1250/1250
1250/1250
1250/1250
400/400
630/630
800/800
1000/1000
1250/1250
1250/1250
1250/1250
1250/1250
400/400
630/630
1000/1000
1250/1250
1600/1600
2000/2000
2500/2500
3150/3150
400/400
400/400
1000*/1000*
1000*/1000*
1000*/1000*
1000*/1000*
1000*/1000*
1000*/1000*
400*/400*
500*/500*
1000*/1000*
1000*/1000*
1000*/1000*
1000*/1000*
1000*/1000*
1000*/1000*
4000
6300
8000
1000
1000
1000
12500
12500
12500
3200
5100
6400
8000
8000
8000
10000
10000
10000
220
315
450
560
560
625
710
710
710
400
630
630/800
1000
1250
-
-
-
-
80
80
80
80
80
-
-
-
-
39
55
70
86
100
-
-
-
-
30
30
35
50
50
50
-
-
-
1800/360
1800/360
1500/300
1500/300
500/100
500/100
500/100
500/100
500/100
10000
10000
10000
10000
10000
10000
2500
2500
1500
–5 to 50
–5 to 50
–5 to 50
–5 to 50
–5 to 50
–5 to 50
–5 to 50
–5 to 50
–5 to 50
300/32x8x2
50x8x2***
50x10x2
63x12x2
50x8x4
100x10x3
100x10x3
100x10x4
150x10x4
240/30/x5x2
50x5x2***
60x5x2
80x5x2
100x5x2
100x5x3
100x5x3
100x5x4
100x10x3
15.50
16.50
27.00
46.00
48.00
51.00
88.00
91.50
98.00
31.20
32.20
44.50
82.00
84.00
87.00
**
**
**
99
Stanguard On-Load Changeover Switch
Exploded view of standguard changeover
Handle assembly
Main label
AUX. Switch (1CO / 2CO) (Optional)
Aux. Switch plate
Mounting screw
Base assly
Plain shaft
M6 HEX NUT
M6X16 HEX. Bolt
M6 spring washer
M6 washer
Short link
Mounting bracket
Phase separator
100
Stanguard On-Load Changeover Switch
Stanguard on-load changeover switch
Size
Rating
Ordering code Open execution
125
ISCNFO0125
160
ISCNFO0160
200
ISCNFO0200
250
ISCNFO0250
0
1
2
3
4
5
320
ISCNFO0320
400
ISCNFO0400
630
ISCNFO0630
800
ISCNFO0800
1000
ISCNFO1000
1250
ISCNFO1250
1600
ISCNFO1600
2000
ISCNFO2000
2500
ISCNFO2500
3150
ISCNFO3150
Stanguard on-load changeover switch
Rating
Ordering code with Sheet steel enclosure
125
ISCNFO0125
160
ISCNFO0160
200
ISCNFO0200
250
ISCNFO0250
320
ISCNFO0320
400
ISCNFO0400
630
ISCNFO0630
800
ISCNFO0800
1000
ISCNFO1000
1250
ISCNFO1250
1600
ISCNFO1600
Note: Phase barriers & Handle with door interlock kit are integral part of the changeover switch
Accessories
Auxiliary contact
• 1NO + 1NC
• 2NO + 2NC
Extension shaft + Channel-set
101
Stanguard On-Load Changeover Switch
Dimensional details (in mm) - Open execution (Size ‘00’)
Current (A)
A
B
C
D
E
F
G
H
J
Q
R
S
T
U
V
040A
144
128
94.5
111
96.5
126.5
12
25.5
21
125
26.5
51
2.5
156
44
063A
144
128
94.5
111
96.5
126.5
12
25.5
21
125
26.5
51
2.5
156
44
080A
144
128
94.5
111
106.5
136.5
12
25.5
21
125
26.5
51
2.5
156
44
100A
144
128
94.5
111
106.5
136.5
12
25.5
21
125
26.5
51
2.5
156
44
H
J
66.0 SQ.
G
C
F D E
Ø34.0
R
B
A
S
Ø6.0
4 NOS.
52.0 SQ.
T
Q
U
V
Dimensional details (in mm) - In enclosure (Size ‘00’)
Current (A)
Cat No.
L
M
N
O
P
W
040A
ISCNFE0040
210
160
200
256
5
165
063A
ISCNFE0063
210
160
200
256
5
165
080A
ISCNFE0080
210
160
200
256
5
165
100A
ISCNFE0100
210
160
200
256
5
165
W
L
P
M
N
O
102
Stanguard On-Load Changeover Switch
Dimensional details (in mm) - 4 pole changeover switches in open execution (Size ‘0’)
Current (A)
A
B
C
D
E
F
G
H
J
Q
R
S
T
U
V
125
220
207
113
132
122
148
20
46
34
174
54
69
3.2
200
62
160
220
207
113
132
122
148
24
46
34
174
54
69
3.2
200
62
200
220
207
113
132
122
148
24
46
34
174
54
69
3.2
200
62
Dimensional details (in mm) - 4 pole changeover switches in open execution (Size ‘1’)
Current (A)
A
B
C
D
E
F
G
H
J
Q
R
S
T
U
V
250
315
300
134
156
165
198
28
63
54
220
57
89
4
244
62
320
315
300
134
156
165
198
35
63
54
220
57
89
4
244
62
Dimensional details (in mm) - 4 pole changeover switches in open execution (Size ‘2’)
Current (A)
A
B
C
D
E
F
G
H
J
Q
R
S
T
U
V
400
405
378
184
206
221
251
40
80
76
270
67
110
5
290
62
630
405
378
184
206
221
251
55
80
76
270
67
110
5
290
62
103
Stanguard On-Load Changeover Switch
Dimensional details (in mm) - 4 pole changeover switches in open execution (Size ‘3’)
Current (A)
A
B
C
D
E
F
G
H
J
Q
R
S
T
U
V
800
464
430
212
234
280
330
45
97
76
292
71
120
8
312
62
Dimensional details (in mm) - 4 pole changeover switches in steel enclosures (Size ‘3’)
Current (A)
K
L
M
N
O
P
W
125
349
309
345
144
274
3
217
160
349
309
345
144
274
3
217
200
349
309
345
144
274
3
217
250
532
445
505
304
350
4
262
320
532
445
505
304
350
4
262
400
610
524
583
384
432
4
310
630
610
524
583
384
432
4
310
800
632
563
580
329
480
4
345
1000
805
705
760
530
630
6
420
1250
805
705
760
530
630
6
420
1600
805
705
760
530
630
6
420
*Dimensions for 2000A, 2500A & 3150A on request
104
Stanguard On-Load Changeover Switch
Dimensional details (in mm) - 4 pole changeover switches in open execution (Size ‘4’)
Current (A)
A
B
C
D
E
F
G
H
J
Q
R
S
T
U
V
1000
570
528
290
315
331
380
70
100
85
362
101
145
10
420
62
1250
570
528
290
315
331
380
70
100
85
362
100
143.5
12
420
62
1600
570
528
290
315
331
380
70
100
85
362
98.5
140
15
420
62
Dimensional details (in mm) - Open execution (Size ‘5’)
Current (A)
B
C
A
D
I
U
E
F
J
K
G
H
T
W
2000
528
290
580
470
315
620
100
75
68.5
412
420
30
12
12
2500
528
290
580
470
315
620
100
75
68.5
412
420
30
12
12
3150
528
290
580
470
315
620
100
75
68.5
412
420
30
15
15
105