BTicino Megatiker M5 electronic circuit breakers

The technical manual of BTicino brand Megatiker M5 electronic circuit breaker covers the rated current of 500A-1600A, the short-circuit breaking capacity of 36kA-1000kA, supports vertical/horizontal installation of 3P/4P poles and panels, and has three types of electronic protection modes: Li/Lsi/Lsig. It integrates overload/short circuit/instantaneous protection and full parameter measurement functions such as current, voltage, and power. The working temperature is * * -25~70 ℃ * *, the mechanical life is 10000 times, and the electrical life is 4000-8000 times. It is equipped with rich accessories such as release devices, motor operating mechanisms, MODBUS communication modules, etc. It follows the IEC/EN 60947 standard and is suitable for precise protection and intelligent monitoring needs in high-voltage and high current distribution scenarios such as large industries and ships.

Basic information and general parameters

Core physical parameters

|Specifications | 3P | 4P|

|Dimensions (W × H × D, mm) | 210 × 320 × 140 | 280 × 320 × 140|

|Weight (kg, fixed version) | In ≤ 1250A: 16; In=1600A：17 | In≤1250A：20； In=1600A：21.5 |

|Standard accessories | 4 fixing screws, 6 connecting screws, 2 phase insulators | 4 fixing screws, 8 connecting screws, 3 phase insulators|

General Electric and Environmental Parameters

Insulation and Voltage: Rated insulation voltage Ui=1000V, rated operating voltage Ue=690V (AC 50/60Hz), impulse withstand voltage Uimp=8kV;

Environmental adaptability: working temperature -25~70 ℃, storage temperature -40~85 ℃, pollution level 3, in compliance with IEC/EN 60947-1 Annex Q Cat. F climate standards;

Lifespan: Mechanical operation 10000 times (with motor control 5000 times), electrical operation 4000 times at rated current, and 8000 times at 0.5In.

Core protection mode and technical parameters

The M5 circuit breaker provides three types of electronic protection modes, adapted to different load protection requirements. The key parameters are shown in the table below:

Protection mode core adjustment parameters instantaneous protection threshold applicable scenarios

Li type Ir (overload current): 0.4-1 × In (1A step size)

Isd (short delay current): 1.5-10 × Ir (11 steps) In ≤ 1250A: 15kA

In=1600A: 20kA simple overload equipment protection

Lsi type Ir: 0.4-1 × In

Tr (overload delay): 3-30s (7 steps)

Isd：1.5-10×Ir

Tsd (short delay): 0-0.5s (6 steps) for distribution systems that require precise delay coordination with Li type

Lsig type intelligent distribution with all Lsi parameters and grounding fault protection, similar to Li type requiring grounding protection and energy monitoring

Short circuit breaking capacity (Icu)

|Model suffix | 240V AC (kA) | 415V AC (kA) | 690V AC (kA) | Ics (% Icu)|

| F（36kA） | 70 | 36 | 14 | 100 |

| N（50kA） | 100 | 50 | 20 | 100 |

| H（70kA） | 105 | 70 | 22 | 100 |

| L（100kA）| 150 | 100 | 25 | 70 |

Measurement function and accuracy

The Lsi/Lsig integrated full parameter measurement function complies with the IEC 61557-12 standard, with the following core measurement parameters and accuracy:

Measurement parameter unit, measurement range, accuracy level

Current (I1/I2/I3/IN) A 20A-1920A Level 1

Voltage (U12/U23/U31) V 88V-690V Level 0.5

Active power (PTot) kW 0.5kW-2.3MW Level 1

Energy consumption (Ep) kWh 0-999GWh Level 1

Voltage Harmonic (THDU)% – Level 5

Current Harmonic (THDI)% – Level 5

Frequency (Freq.) Hz 50-60Hz 0.02 level

Installation requirements and power loss

Installation specifications

Cable adaptation: Both copper and aluminum cables are supported, and the maximum cross-sectional area of standard cage terminals is flexible 2 × 185mm ² and rigid 2 × 240mm ²; High capacity terminals: flexible 4 × 185mm ², rigid 4 × 240mm ²;

Electric power protection: In case of short circuit, the distance between the conductor and the circuit breaker should be ≥ 200mm (100kA breaking capacity) and ≥ 350mm (36kA breaking capacity);

Special installation: Supports pull-out type (requires M7B25-M7B30 base+M7B29-M7B30 mechanism), achieving “connect test pull-out” three position operation.

Single pole power loss (W)

|Installation type | 500A | 630A | 800A | 1000A | 1250A | 1600A|

|Fixed version (front terminal) | 11.6 | 18.3 | 29.8 | 47.0 | 74.4 | 58.9|

|Fixed version (rear terminal) | 11.5 | 18.5 | 29.4 | 47.6 | 73.4 | 65.3|

|Extract publication (front terminal) | 20.0 | 31.8 | 51.2 | 82.0 | 128.1 | 112.6|

|Extract publication (rear terminal) | 15.0 | 23.8 | 38.4 | 60.0 | 93.8 | 97.3|

Capacity reduction characteristics

Temperature reduction | Rated current (A) | Environmental temperature 30 ℃ | 40 ℃ | 50 ℃ | 60 ℃ | 70 ℃|

| 500/630 | 500/630 | 500/630 | 500/630 | 500/630 | 500/630 |

| 800 | 800 | 800 | 800 | 800 | 720 |

| 1000 | 1000 | 1000 | 1000 | 1000 | 900 |

| 1250/1600 | 1250/1600 | 1250/1600 | 1250/1600 | 1250/1600 | 938/1360 |

Altitude reduction

|Altitude (m) | Rated operating voltage Ue (V) | Rated current In (A)|

| 2000 | 690 | 1×In |

| 3000 | 590 | 0.98×In |

| 4000 | 520 | 0.93×In |

| 5000 | 460 | 0.9×In |

Accessory system (core compatible models)

The accessory category represents the core functional key parameters of the product

Release M7C024 (excitation) remote disconnection 24Vac/dc, power consumption 300VA/W, disconnection time ≤ 50ms

Release M7T024 (undervoltage) undervoltage protection 24Vac, trip voltage 85-110% Vn, power consumption 5VA

Auxiliary contact M7X01 status feedback 3A/250VAC, 1NO/NC, supports fault signal output

Motor operation M7875P/024 electric opening and closing 24Vac/dc, mechanical life 5000 times

Intelligent accessory M7COM MODBUS communication RS485 interface, 24Vac/dc power supply, supports remote monitoring

Intelligent accessory MPXX02 Bluetooth communication adaptation mobile app, realizing parameter configuration and status monitoring

Connect accessories M7900/4 cage terminals 4 pieces/set, compatible with 4 × 240mm ² rigid cables

Compliance

Certification: Passed IECEE CB/LOVAG certification, with local certifications such as CCC (China) and EAC (Eurasia), in compliance with ship regulations (Lloyds, RINA, BV);

Environmental Protection: Adhere to the REACH, RoHS, and RAEE directives, and provide a PEP environmental passport;

Identification: The manufacturer, model, and breaking capacity are laser marked on the front (colored identification), and the side stickers contain barcode, country of production, and other information.