MINIATURE CIRCUIT BREAKER
Electrical distribution needs are continuously
evolving in residentional, commercial and
Industrial sectors. Improved operational safety,
continuity of service, greater convenience and
operating cost have assumed a tremendous
significance. Miniature circuit breakers have
been designed to continuously adapt to these
changing needs.
Range
6A to 40A "B" Curve
0.5A to 63A "C" Curve
0.5A to 63A for "DC" Application
Execution
Single Pole (1P)
Single Pole & Neutral (1P+N)
Double Pole (2P)
Three Pole (3P)
Three Pole & Neutral (3P+N)
Four Pole (4P)
• UNIFORM 10KA BREAKING CAPACITY
FOR "B" AND "C" CURVE
Specification
• LOW POWER CONSUMPTION, THUS
COST EFFECTIVE & ENERGY SAVING
IEC/EN 60898
• SUITABLE FOR DC AND FOR A WIDE
FREQUENCY RANGE OF 50Hz-400Hz
APPLICATION
Feature
• "FINGER SAFE" TERMINALS-IP20
DEGREE OF PROTECTION
• ARC CHUTE FOR EFFECTIVE ARC
QUENCHING
• SILVER GRAPHITE CONTACTS FOR
ENHANCED LIFE
• Precise hammer action
• 15 Plates Arc Chute for effective arc quenching
• Longer electrical life
• Wide range
• Value for money
• Low power consumption, thus cost effective &
energy saving
Accessories
Auxiliary Switch
Shunt trip
3
MINIATURE CIRCUIT BREAKER
HOUSING:
• The housing of Decovolt MCB is Injection Moulded from special grade PBT as per international specifications.
• The housing and other moulded components are fire retardant, anti-tracking and non hygroscopic.
• The Housing can withstand high temperature and is impact resistant.
CONTACTS:
Contacts are made of special silver inlaid into copper strip, ensuring higher life and maximum safety against
contact welding and erosion. These contacts have low contact resistance resulting into low watt loss.
CURRENT LIMITING ACTION: The high speed current limiting action ensures that the MCB operate before
the full prospective fault current is allowed to develop. Under fault conditions, damage can be sustained to the
installation and associated equipment due to the amount of energy that passes before the current is completely
interrupted. The total energy let through depends on the value of current and the time for which it flows. The high
speed current limiting action of DECOVOLT MCB ensures that the energy let through and any subsequent damage
is minimized. This reduced LET THROUGH ENERGY (Class 3 as per BSEN 60898) assists greatly with both backup and discrimination considerations.
OPERATING MECHANISM: DECOVOLT MCB have a quick make and break trip free mechanism. In the event
of an over current or short circuit the MCB automatically interrupts all poles even if the MCB toggle is held in ON
position, the handle always indicates the correct contact position.
MODERATE
Internal View of MCB
OVERLOAD
CONDITION:
Detection of moderate Over load conditions is
achieved by the use of a Bimetal Overload Relay,
Outgoing Terminal
which deflects in response to the current passing
Body
through it The Bimetal Relay moves against the trip
bar releasing the trip mechanism.
Latch
Arc-chutes Holder
Solenoid
Arc-chutes
Arc-runner
Arc-chutes Holder
SHORT CIRCUIT CONDITIONS: When the
current flowing through the MCB reaches a predetermined level, the solenoid in Magnetic coil directly pulls
in the plunger, which releases the trip mechanism.
Moving Contact Arm
Fixed Contact
PERFECT CONECTIONS: The design of terminals makes the wiring easier. A combination box type
Incoming Terminal
(Dual Termination)
terminal with combination head screws on both sides
with deep serrations ensures sparkles and firm
connections.
4
MINIATURE CIRCUIT BREAKER
TECHNICAL INFORMATION
TITLE
MCB
STANDARD CONFORMITY
IEC 60898:2002
TYPE/SERIES
ISOLATOR
IEC 60947-3:2001
B
C
B
6-40*
6-40*
6-40*
240/415
240/415
240/415
RATED FREQUENCY (f)
50
50
50
Nos of Poles (Execution)
1P,1P+N,2P,3P,3P+N,4P
1P,1P+N,2P,3P,3P+N,4P
1P,1P+N,2P,3P,3P+N,4P
10
10
10
(3-5) In
(3-5) In
(3-5) In
660
660
660
4
4
4
LESS THAN 32 Amps
20000
20000
20000
MORE THAN 32 Amps
10000
10000
10000
- 5 to + 55
- 5 to + 55
- 5 to + 55
25
25
25
3
3
3
40MM FREE FALL
40MM FREE FALL
40MM FREE FALL
IP 20
IP 20
IP 20
RATED CURRENT (In)
RATED VOLTAGE (AC) (Ue)
RATED SHORT CIRCUIT
BREAKING CAPACITY Ka
UTILIZATION CATEGORY
MAGNETIC RELEASE
SETTING
RATED INSULATION
VOLTAGE(Ui)
RATED IMPULSE
VOLTAGE (Uimp)
ELECTRICAL / MECHANICAL
ENDURANCE
AMBIENT TEMPERATURE
TERMINAL CAPACITY
(MAX) sq.mm
VIBERATION
g
SHOCK
PROTECTION CLASS
INSTALLATION POSITION
MOUNTING
CASE & COVER
VERTICAL/ HORIZONTAL
CLIP ON DIN RAIL
VERTICAL/ HORIZONTAL VERTICAL/ HORIZONTAL
CLIP ON DIN RAIL
CLIP ON DIN RAIL
MOULDED, FLAME RETARDANT THERMOPLASTIC MATERIAL
* CURRENT RATINGS - 0.5, 1,2,3,4,5,6,8,10,16,20,25,32,40,50,63
"B" CURVE MCB's ARE AVAILABLE ON
REQUEST
**
1P SINGLE POLE
1P+N SINGLE POLE NEUTRAL
2P DOUBLE POLE
3P THREE POLE
3P+N THREE POLE NEUTRAL
4P FOUR POLE
5
MINIATURE CIRCUIT BREAKER
SELECTION
Fresh hold application
APPLIANCES
AIR CONDITIONER
REFRIGATOR
OVEN/GRILLER
OVEN/GRILLER
HOT PLATE ONLY
ROOM HEATER
WASHING MACHINE
WASHING MACHINE
WITH HEATER
WATER HEATER
STORAGE / INSTANT
ELECTRIC IRON
AUTO TOASTER ( 2 SLICES)
ELECTRIC KETTLE
CAPACITY/WATT
(Load)(240V-1pH)
1.0 tonnes
1.5 tonnes
2.0 tonnes
165 litres
350 litres
4500 W
1750 W
750W
2000W
1000W
2000W
300W
CURRENT
RATING OF MCB
10A
16A
20A
3A
4A
32A
10A
6A
10A
6A
10A
2A
TYPE OF
MCB
"C" SERIES
"C" SERIES
"C" SERIES
"C" SERIES
"C" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"C" SERIES
1300W
1000W
2000W
3000W
6000W
750W
1250W
1200W
1500W
8A
6A
10A
16A
32A
6A
8A
8A
10A
"C" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
"B" SERIES
Lamp
Watt
20W
No of
lamps
8
12
Rating
(A)
1
1.5
40W
2
10
12
1
4
8
12
1
2
5
8
12
0.5
2
2.5
0.5
1.5
3
4
0.5
1
2
4
5
60W
80W
100W
S.NO
KW
HP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
0.18
0.25
0.37
0.55
0.75
1.1
1.5
2.2
3
3.75
5.5
7.5
10
15
18.5
22
30
0.24
0.34
0.5
0.74
1.01
1.47
2.01
2.95
4.02
5.03
7.37
10.05
13.4
20.11
24.8
29.49
40.21
3 PHASE 400V DOL
STARTING
FULL LOAD
MCB
CURRENT SELECTION
C
0.9
2
1.2
2
1.2
2
1.8
3
2
3
2.6
6
3.5
10
4.4
10
6.3
16
8.2
20
11.2
25
14.4
40
21
50
27
100
32
125
38
125
51
125
3 PHASE 400V ASSISTED
STARTING STAR DELTA
MCB
FULL LOAD
CURRENT SELECTION
C
D
6.3
16
10
8.2
20
10
11.2
32
16
14.4
40
25
21
50
32
27
63
40
32
50
38
63
51
63
NOTE: One lighting circuit can have up to 800W or up to 10 lighting points
One power circuit can have up to 2000W or 1 power point
6
1
1.5
2.5
" B " series MCB is used for
lighting applications
SELECTION OF MCB FOR MOTOR PROTECTION
1 PHASE 230V DOL
STARTING
MCB
FULL LOAD
CURRENT SELECTION
C
2.8
10
3.2
10
3.5
10
4.8
16
6.2
20
8.7
25
11.8
32
17.5
50
20
63
24
80
26
80
47
125
-
1
2
4
MINIATURE CIRCUIT BREAKER
TRIPPING CHARACTERSTICS CURVES
Tripping Characterstics Curve
Type B & C
10000
5000
3600
10000
5000
3600
Limit Specified in
IEC-60898-1-2002
In : Rated Current
B Type - 0.5A to 100A
C Type - 0.5A to 100A
Lower Limit as per Standard
Upper Limit as per Standard
1000
Tripping Characterstics Curve
DC MCB Type B & C
Upper Limit as per Standard
1000
Reference Calibration Temp-30˚C
Time in Seconds
In < 32A
10
In > 32A
100
In < 32A
10
1
1
B-Type
B-Type
C-Type
C-Type
0.1
0.1
0.01
11.131.45 2 2.55 3
5
10
14
20
28
Multiple of Rated Current
50
Decovolt MCB Vs Zero Point
Extinguishing MCB
U/V
0.01
11.131.45 2 2.55 3
5
10
14
20
28
Multiple of Rated Current
50
Temperature Compensation Graph
60
50
Current
Limiting
40
Ambient Temp.˚C
Time in Seconds
Reference Calibration Temp-30˚C
In > 32A
100
Limit Specified in
IEC-60898-1-2002
In : Rated Current
B Type - 0.5A to 100A
C Type - 0.5A to 100A
Lower Limit as per Standard
U/V
30
20
MCB
U/V
10
0
-10
Zero point
Extinguishing
MCB
Un = Mains Voltage
ID = Let - through short circuit current
0.7
UB = Arc Voltage
Ip = Prospective short circuit current
0.6
0.9
1.0
1.1
Correction Factor
1.2 1.3
1.4
˚
Reference Calibration Temp. 30 C
7
MINIATURE CIRCUIT BREAKER
SINGLE POLE
SINGLE POLE - N
DOUBLE POLE
8
CURRENT RATING (A)
0.5
1
2
3
4
5
6
10
16
20
25
32
40
50
63
"B CURVE" CAT NO
DVBSP105
DVBSP1001
DVBSP1002
DVBSP1003
DVBSP1004
DVBSP1005
DVBSP1006
DVBSP1010
DVBSP1016
DVBSP1020
DVBSP1025
DVBSP1032
DVBSP1040
DVBSP1050
DVBSP1063
CURRENT RATING (A)
0.5
1
2
3
4
5
6
10
16
20
25
32
40
50
63
CURRENT RATING (A)
0.5
1
2
3
4
5
6
10
16
20
25
32
40
50
63
"C" CURVE CAT NO
DVCSP105
DVCSP1001
DVCSP1002
DVCSP1003
DVCSP1004
DVCSP1005
DVCSP1006
DVCSP1010
DVCSP1016
DVCSP1020
DVCSP1025
DVCSP1032
DVCSP1040
DVCSP1050
DVCSP1063
"C" CURVE CAT NO
DVASP105
DVASP1001
DVASP1002
DVASP1003
DVASP1004
DVASP1005
DVASP1006
DVASP1010
DVASP1016
DVASP1020
DVASP1025
DVASP1032
DVASP1040
DVASP1050
DVASP1063
"B CURVE" CAT NO
DVBDP105
DVBDP1001
DVBDP1002
DVBDP1003
DVBDP1004
DVBDP1005
DVBDP1006
DVBDP1010
DVBDP1016
DVBDP1020
DVBDP1025
DVBDP1032
DVBDP1040
DVBDP1050
DVBDP1063
"C" CURVE CAT NO
DVCDP105
DVCDP1001
DVCDP1002
DVCDP1003
DVCDP1004
DVCDP1005
DVCDP1006
DVCDP1010
DVCDP1016
DVCDP1020
DVCDP1025
DVCDP1032
DVCDP1040
DVCDP1050
DVCDP1063
MINIATURE CIRCUIT BREAKER
THREEE POLE
THREEE POLE - N
DOUBLE POLE
CURRENT RATING (A)
0.5
1
2
3
4
5
6
10
16
20
25
32
40
50
63
"B CURVE" CAT NO
DVBTP105
DVBTP1001
DVBTP1002
DVBTP1003
DVBTP1004
DVBTP1005
DVBTP1006
DVBTP1010
DVBTP1016
DVBTP1020
DVBTP1025
DVBTP1032
DVBTP1040
DVBTP1050
DVBTP1063
CURRENT RATING (A)
0.5
1
2
3
4
5
6
10
16
20
25
32
40
50
63
CURRENT RATING (A)
0.5
1
2
3
4
5
6
10
16
20
25
32
40
50
63
"C" CURVE CAT NO
DVCTP105
DVCTP1001
DVCTP1002
DVCTP1003
DVCTP1004
DVCTP1005
DVCTP1006
DVCTP1010
DVCTP1016
DVCTP1020
DVCTP1025
DVCTP1032
DVCTP1040
DVCTP1050
DVCTP1063
"C" CURVE CAT NO
DVATP105
DVATP1001
DVATP1002
DVATP1003
DVATP1004
DVATP1005
DVATP1006
DVATP1010
DVATP1016
DVATP1020
DVATP1025
DVATP1032
DVATP1040
DVATP1050
DVATP1063
"B CURVE" CAT NO
DVBFP105
DVBFP1001
DVBFP1002
DVBFP1003
DVBFP1004
DVBFP1005
DVBFP1006
DVBFP1010
DVBFP1016
DVBFP1020
DVBFP1025
DVBFP1032
DVBFP1040
DVBFP1050
DVBFP1063
"C" CURVE CAT NO
DVCFP105
DVCFP1001
DVCFP1002
DVCFP1003
DVCFP1004
DVCFP1005
DVCFP1006
DVCFP1010
DVCFP1016
DVCFP1020
DVCFP1025
DVCFP1032
DVCFP1040
DVCFP1050
DVCFP1063
9