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Moulded Case Circuit Breakers

MERLIN GERIN COMPACT:

Setting high Standards

Merlin Gerin Compact range of MCCBs is the leading international brand. Compliance to all major international standards and tropicalisalion to withstand extreme climatic conditions has ensured its most preferred status in more than 130 countries all over the world.

The offered range comprises of the latest Compact NS series from 16 A to 630 A and Compact C from 800 A to 1250 A.

Designed to meet and also to exceed the requirements of latest standards
(IEC-947-2 / IS 13947-2), these mccb's offer wide range of special features with exceptional performance characteristics.

Service continuity :

The innovative 'roto-active' breaking principle is the heart of the latest NS range. Comprising of an unique double break, rotary contact system along with a pressure tripping unit, the reflex mechanism, it ensures exceptional current limitation. Total discrimination is achievable as a standard feature

Reliable protection :

The high levels of breaking capabilities is supported by a extensive range of tripping releases, both thermo-magnetic and electronic, with a host of user definable options for protection, monitoring, measurement and communication.

User friendly :

A modular construction along with a wide range of site-fittable common auxiliaries and add-on functional modules allows field conversion of the basic breaker to a multifunctional one as per user requirement. Rationalization dimensions has enabled availability of 8 breaker ratings with 3 breaking capacities in just 3 frame sizes with uniform cut-outs/mounting dimensions.

Total Safety :

All compact circuit breakers are suitable for isolation as defined by IEC947-2, even when equipped with motor mechanism or rotary handle. Locking in the open position (maximum 3 padlocks or key lock) ensures total safety during maintenance.

Roto - Active mechanism :

The Roto-active breaking system provides the circuit breakers with a high level breaking capacity in a confined space, and an outstanding disconnection and endurance performance.

Each device contains 3 or 4 identical breaking units each of which is sealed in a thermoset polyester chamber. The breaking mechanism comprises two contacts in series with an intermediate contact mounted on a rotating pivot. At high fault currents, due to magnetic repulsion produced by current reversal phenomenon, two arcs are generated. The rotating movement directs the arc into the arc chutes and ensures rapid extinction.

The reflex tripping system consists of piston trip unit which is connected to the arc chute chamber of the breaking units. The gases produced during fault interruption is directed to the piston unit which directly actuates the breaker opening mechanism, the impulsion time is minimum and faults of 15kA are cleared in 2 milisecs.

 

 

 

 

 

Moulded Case Circuit Breakers

Moulded Case
Circuit Breakers

 

 

 

 

 

 

 

 

 

Compact NS
breaking unit

TECHNICAL SPECIFICATION :

Compact circuit breakers
NS100
NS 160
NS 250
NS 400
NS 630
C 801
C 1001
C1251
number of Poles
3, 4 (*)
3, 4 (*)
3, 4 (*)
3, 4
3, 4
3, 4
3, 4
3, 4
rated current (A)
In
40°C
100
160
250
400
630
800
1000
1250
protection against overcurrents (A)
Ir
setting
current
12.5..100
12.5..160
12.5..250
160..400
250
..630
320
..800
400..1000
500..1250
rated insulation voltage (V)
Ui
750
750
750
750
750
750
750
750
rated insulation withstand voltage (V)
uimp
8
8
8
8
8
8
8
8
rated operational voltage (V)
Ue
AC 50/60
Hz
690
690
690
690
690
690
690
690
DC
500
500
500
500
500
N
H
N
H
N
H
N
H
N
H
N
H
N
H
N
H
ultimate breaking capacity (kA rms)
Icu
AC 50/
60 Hz
380/
415 V
25
70
36
70
36
70
45
70
45
70
50
70
50
70
50
70
service breaking capacity
Ics
(% Icu)
100%
100%
100%
100%
100%
100%
100%
100%
100%**
100%**
50%
50%
50%
50%
50%
50%
utilization category
A

A
A
A
A
A
A
A
A
A
B
B
B
B
B
B
short-time withstand current 1 sec
Icw
kA rms
--
--
--
--
--
--
--
--
--
--
12
12
15
15
15
15
endurance (C-O cycles)
mechanical
50000
40000
20000
15000
15000
15000
15000
15000
elec
trical
440
V-In
30000
20000
10000
6000
4000
1500
1500
1500
dimensionsL x H x D (mm)
2/3 poles,
fixed FC
105x161
x86
105x161
x86
105x161
x86
140x255
x110
140x255
x110
210x374
x172
210x374
x172
210x374
x172
4 poles,
fixed, FC
140x161
x86
140x161
x86
105x161
x86
185x255
x100
185x255
x100
210x374
x172
280x374
x172
280x374
x172
weight (kg)
3 poles,
fixed, FC
1.6
1.6
1.9
6.0
6.0
13.0
13.0
13.0
4 poles,
fixed, FC
2.1
2.1
2.3
7.8
7.8
17.0
17.0
17.0

*2 Pole only for N Type
** For operational voltage upto 500v

TRIP UNIT SETTINGS :

Trip Units
TMD
STR22SE
STR23SE
STR53UFET
STR25DE
STR55UET
Protection
overload protection threshold Ir (A)
0.8...1 xIn
0.4...1xIn
0.4...1xIn
0.4...1xIn
0.4...1xIn
0.4...1xIn
Tripping Time (overload), tr (sec) @ 6xir
-
5...7.5
5...7.5
5 settings
6...7.5
6 settings
Short Circuit Protection Threshold, Im (A)
Fixed
2...
10xIr
2...
10xIr
1.5...
10xIr
1.5...10xIr
1.5...10xIr
Time delay (short circuit), tm (msec)
--
Fixed (£40)
Fixed (£40)
4 settings
Fixed (£60)
4 settings
Instantaneous Protection Threshold, I (A)

--
11xIn
11xIn
1.5...11xIn
-
2....15xIn
Earth Fault Protection Threshold, Ih (A)
--
--
--
0.2...1xIn
--
0.2...0.6xIn
Earth Fault tripping delay, the (sec)
--
--
--
4 settings
--
4 setting

Note : Adjustable Neutral Protection option is available in all trip units except TMD

 
 

Air Circuit Breaker

MASTERPACT MERLIN GERIN

Masterpact Presentation :

Masterpact circuit breakers are used to protect and control low-voltage distribution systems. They may be installed in main LV switchboards (incoming units, main and secondary outgoings). Masterpact is a complete range offering a large selection of performance levels :

  • ratings from 800 to 6300A, AC, from 1000 to 8000 A DC;
  • breaking capacity from 40 to 150 kA rms;
  • operational voltages 690 V Ac, 1000 V DC.

Many versions :

  • 3 or 4 poles;
  • fixed or drawout versions;
  • current-limiting version up to 2500 A;
  • Wide range of control units offering multiple functions.

Circuit breakers designed for all applications

  • 1000 V AC version;
  • DC version;
  • anti-corrosion version;
  • source-changeover version;
  • merchant-marine and military versions. Masterpact circuit breakers comply with all major international standards and meet T2 tropicalisation criteria.

Front face :

  1. opening push-button (O)
  2. closing push-button (I)
  3. keylock for "connected", "disconnected" or "test" position
  4. door interlock
  5. stored-energy-mechanism charging handle
  6. operations counter
  7. "open" position keylock
  8. racking handle storage
  9. functional position indicator "connected", "test" and"disconnected"
  10. controls on fixed chasis (accessible with cubicle door closed)
  11. padlocking facilities for "connected", "disconnected" or "test" position
  12. stored-energy-mechanism status indicator
  13. main-contact position indicator
  14. fault-trip indicator/breaker reset button

Reduced dimensions :

  • AC circuit breakers ;
    • a single frame size from 800 to 3200 A;
    • common height and depth from 800 to 6300 A;
  • DC circuit breakers:
    • common height and length from 1000 to 8000A for operational voltages up to 500 V DC,
    • common height and length from 1000 to 4000A for operational voltages greater than 500 V DC.

Masterpact : functions and characteristics
circuit breaker selection M08 to M10

Masterpact circuit breakers
M08
M10
number of poles
3, 4
3, 4
electrical characteristic as per IEC 947-2 and EN 60947-2
rated current (A)
In
40 °C
800
1000
rating of 4th pole (A)
800
1000
rating insulation voltage (V)
Ui
1000
1000
rated impulse withstand voltage (V)
Uimp
8000
8000
rated operational voltage (V)
Ue
AC 50 /60 Hz
690
690
type of circuit breaker
N1
H1
H2
L1
N1
H1
H2
L1
ultimate breaking capacity (1)
(kA rms)
Icu
AC 50/
60 Hz
220/
415V
40
65
100
130
40
65
100
130
440V
40
65
100
110
40
65
100
110
500/
690 V
40
65
85
65
40
65
85
65
service breaking capacity
Ics
(% Icu)
100%
100%
100%
100%
100%
100%
100%
100%
short-time
withstand current
(kA rms)
Icw
AC 50/
60/ Hz
0.5 s
40
65
65
12
40
65
65
12
1 s
30
50
50
12
30
50
50
12
3 s
22
32
32
12
22
32
32
12
making capacity
(kA peak)
Icm
AC 50/
60/ Hz
220/
415 V
84
143
220
286
84
143
220
286
440 V
84
143
220
242
84
143
220
242
500/
690 V
84
143
187
143
84
143
187
143
electrodynamic withstand (kA peak)
84
143
143
24
84
143
143
24
utilisation category
B
B
B
B
B
B
B
B
suitability for isolation
*
*
break time
25 to 30 ms without intentional time delay and 9 ms for type L1
closing time
70 ms

endurance
 (c-o cycles)
x 1000
mechanical
with maintenance
20
20
20
15
20
20
20
15
no maintenance
10
10
10
10
10
10
10
10
electrical
no maintenance
440
V-In
10
10
10
2.5
10
10
10
2.2
690
V-In
10
10
10
2.5
10
10
10
2.2
motor
control
(AC3-
947-4)(2)
690V
10
10
10
-
10
10
10
-
electrical characteristics as per standard Nema AB1
breakng capacity (kA)
480 V
40
65
100
-
40
65
100
-
600 V
40
65
65
-
40
65
65
-
projection
200 to 800 (3)    
200 to 1000 (3)
control
unitprotection type
instantaneous
STR 18 M
*
*
*
*
*
*
distribution
STR 28 D
*
*
*
*
*
*
selective
STR 38 S
*
*
*
*
*
*
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