BTicino Megatiker M4 Circuit Breaker

3. Rated short-circuit making capacity (Icm)

Breaking ability level Icm @ 415V

F (36kA) 76.5 kA

N (50kA) 105 kA

H (70kA) 154 kA

L (100kA) 220 kA

Power loss

1. Power loss per pole of the circuit breaker (In=630A)

Connection method: Phase pole (W) Neutral pole (W)

Cage terminal 37.3 21.2

Wiring terminal 37.3 21.2

External wiring terminal 42.1 23.1

Expansion terminal 44.7 24.1

Rear wiring terminal 45.0 24.3

Plug in version 85.3 40.5

With leakage protection 57.2 28.2

2. Power loss per pole of isolation switch (In=630A)

Connection method: Phase pole (W) Neutral pole (W)

Cage terminal 37.3 37.3

Expansion terminal 44.7 44.7

Rear wiring terminal 45.0 45.0

Plug in version 85.3 85.3

With leakage protection 57.2 57.2

Reduced capacity usage

1. Temperature reduction

The ambient temperature has a significant impact on the current carrying capacity of circuit breakers. The following table shows the maximum continuous operating current at different temperatures:

In (A) 10°C 20°C 30°C 40°C 50°C 60°C 70°C

250 336 307 279 250 220 193 166

320 416 384 352 320 288 256 224

400 475 460 425 400 360 320 280

500 600 550 525 500 455 410 365

630 700 683 650 630 580 530 480

2. Altitude Capacity Reduction

When the installation altitude exceeds 2000 meters, it is necessary to reduce the capacity according to the following coefficient:

Altitude (m) ≤ 2000 3000 4000 5000

Working voltage Ue (V) 690 590 520 460

Rated current In 1 × In 0.98 × In 0.93 × In 0.9 × In

3. Environmental adaptability

Climate conditions: Complies with IEC/EN 60947-1 Appendix Q, Cat. F, suitable for temperature, humidity, vibration, shock, and salt spray environments

Electromagnetic compatibility: Complies with Appendix F of IEC/EN 60947-2

Pollution level: Level 3

Accessories and Options

The M4 series offers a wide range of electrical and mechanical accessories to meet different application needs.

1. Leakage protection module

Parameter standard type LED type

Type A - S A - S

Rated current 630A 630A

Rated voltage 500V AC 500V AC

Leakage action current I Δ n 0.03/0.3/1/3 A 0.03/0.3/1/3 A

Delay time Δ t 0/0.3/1/3 s 0/0.3/1/3 s

50% I Δ n pre alarm: None

Model (400A) T7082/400 T7081/400

Model (630A) T7092/630 T7091/630

2. Release device

Split release (ST)

Voltage specifications: 24V, 48V, 110-130V, 220-250V, 380-440V (AC/DC)

Voltage range: 70% to 110% Un

Action time: ≤ 50 ms

Power consumption: 300 VA/W

Undervoltage Release (UVR)

Voltage specifications: 24V AC/DC, 48V DC, 110-125V AC, 220-240V AC, 380-415V AC

Operating voltage: 35% to 70% Un

Reset voltage: 85% to 110% Un

Action time: ≤ 50 ms

Delay module: can be equipped with 800ms delay module (M7000E/024, M7000MR/230, M7000MR/400)

3. Auxiliary contacts

Model: M7X01

Contact form: 1NO/NC conversion contact

Rated current: 3A @ 250V AC

Configuration: M4 supports a maximum of 2 auxiliary contacts, 1 fault signal contact, and 1 release

4. Rotate the handle

Type and Model Description

Direct standard M7447 black handle

Direct emergency M7R14 red/yellow handle

Variable depth standard T7449 IP55, black

Variable depth emergency T7449E IP55, red/yellow

Lock attachment M7R17 for variable depth handle, requires universal lock cylinder

5. Electric operating mechanism

Energy storage electric operating mechanism

Model: M7475P/024, M7475P/048, M7475P/110, M7475P/230

Voltage: 24V, 48V, 110V, 230V AC/DC

Closing time: ≤ 100 ms

Energy storage time: ≤ 2 seconds

Mechanical lifespan: 10000 cycles

Direct acting electric operating mechanism

Model: M740230

Voltage: 230V AC

Closing time: ≤ 550 ms

Opening time: ≤ 450 ms

Mechanical lifespan: 10000 cycles

6. Connect attachments

Cage terminal

Standard type: M7400, supports 1 × 240mm ² (flexible) or 1 × 300mm ² (rigid)

High capacity type: M7400/2, supports 2 × 185mm ² (flexible) or 2 × 240mm ² (rigid)

Expansion terminal

3P model: M7430/3

4P model: M7430/4

Rear wiring terminal

3P model: M7450/P

4P model: M7451/P

7. Insertion and extraction attachments

Insertion attachment

Special terminals: M7B11 (3P), M7B12 (4P)

Front wiring base: M7B13 (3P), M7B14 (4P)

Rear wiring base: M7B15 (3P), M7B16 (4P)

With leakage base: M7B17 (4P front wiring), M7B18 (4P rear wiring)

Pull out the handle: M7B19

24 pin connector: M7B20

Pull out attachment (Debro lift mechanism)

Base: M7B22 (3P), M7B23 (4P), M7B24 (4P with leakage)

Position signal contact: M7T910N

Pull out the handle: M7T412

Auxiliary contact: M7B21 (up to 2)

8. Mechanical accessories

Padlock: M7045, used to lock in the "off" position

Interphase insulation partition: M7295

Terminal protective cover: M7475 (3P), M7476 (4P)

IP20 terminal cover: M7C11 (3P), M7C12 (4P)

9. Universal key lock

Support locking of rotating handle, electric operating mechanism, insertion mechanism, and extraction mechanism:

Lock cylinder type and model

Randomly encoded flat key M7K01

Fixed code EL43525 M7K02

Fixed code EL43363 M7K03

Randomly encoded star key M7K04

Release curve and current limiting curve

1. Thermal magnetic release curve

The M4 circuit breaker provides a typical thermal magnetic trip curve, including:

Cold state characteristic (curve 1): the action time of the circuit breaker when it is in a cold state

Curve 2: The operating time of a circuit breaker when it is in a hot state

The overload protection section has inverse time characteristics, while the short circuit protection section has instantaneous action with adjustable action values (5-10 × In).