BTICINO MEGATIKER Circuit Breaker Series

BTICINO MEGATIKER Circuit Breaker Series

Introduction

In modern industrial and building electrical systems, molded case circuit breakers (MCCBs) are critical distribution protection equipment, and their reliability, accuracy, and flexibility directly affect the safety and operational efficiency of the entire system. The MEGATIKER series circuit breakers launched by BTicino provide ideal solutions for various application scenarios with their rated current of up to 1600A, breaking capacity of up to 100kA, and rich functional configurations. This article is based on the MEGATIKER product catalog, systematically sorting out the characteristics, technical parameters, installation methods, and accessory configurations of each model, providing professional references for engineers and system integrators.

Product Series Overview

The MEGATIKER series covers a complete current range from 16A to 1600A and is divided into the following five main models:

M1 160: Rated current 16-160A, suitable for DIN rail installation, breaking capacity 16-25kA

M2 250: Rated current 40-250A, suitable for DIN rail installation, breaking capacity 25-36kA

M3 125/160/250: rated current 16-250A, suitable for panel installation, breaking capacity 36-100kA

M4 630: Rated current 250-630A, suitable for panel installation, breaking capacity 36-100kA

M5 1600: Rated current 500-1600A, suitable for panel installation, breaking capacity 50-100kA

All models are available in 3-pole and 4-pole versions, and support fixed, plug-in, and pull-out installation methods to meet different maintenance and space requirements.

M1 160: Compact DIN rail mounted circuit breaker

The M1 160 series is designed specifically for control cabinets with limited space, featuring a 17.5mm width design and supporting TS 35 DIN rail installation.

1. Thermal magnetic circuit breaker (M1 160E/B)

Rated current: 16A to 160A

Breaking capacity: E type is 16kA, B type is 25kA

Protection features: Overload protection (thermal) and short circuit protection (magnetic)

Indication function: Circuit breaker and contact status display

Attachment support: auxiliary contacts, alarm contacts, shunt release, undervoltage release, electric operating mechanism, mechanical interlock

2. Thermal magnetic circuit breaker with leakage protection (M1 160E/B)

Built in leakage protection module, suitable for places with high requirements for personal safety

Adjustable leakage current: 0.03A, 0.3A, 1A, 3A

Adjustable delay time: 0s, 0.3s, 1s, 3s

The 4-pole version supports 3P+N/2 protection and neutral wire protection

M2 250: Multi functional DIN rail mounted circuit breaker

The M2 250 series provides richer electronic protection and measurement functions while maintaining the convenience of DIN rail installation.

1. Thermal magnetic and electronic versions

Thermal magnetic type: rated current 100-250A, breaking capacity 25-36kA

Electronic: rated current 40-250A, breaking capacity 25-36kA

Electronic protection type:

Li: Overload long delay (L)+short circuit instantaneous (I)

Lsi: Overload long delay (L)+Short circuit short delay (S)+Short circuit instantaneous (I)

Lsig: Add ground fault protection on top of Lsi (G)

2. Integrated measurement function

LCD display screen: Real time display of parameters such as current, voltage, power, electrical energy, THD, etc

Internal battery: Parameter settings can still be made even when the circuit breaker is disconnected

Communication interface: Supports MODBUS RS485 protocol for remote monitoring

3. Leakage protection version

Built in leakage protection module, rated current 40-250A

Leakage action current: 0.03A, 0.3A, 1A, 3A

Adjustable delay time: 0s, 0.3s, 1s, 3s

M3 series: High performance panel mounted circuit breaker

The M3 series includes M3 125, M3 160, and M3 250, providing a breaking capacity of up to 100kA, suitable for industrial power distribution and motor protection.

1. M3 125/160/250 thermal magnetic type

Rated current

M3 125：16-125A

M3 160：160A

M3 250：16-250A

Breaking capacity level: F (36kA), N (50kA), H (70kA), L (100kA)

Neutral wire protection: The 4P version provides 100% neutral wire protection

2. M3 250 electronic

Support multiple protection types including Li, Lsi, and Lsig

Overload protection Ir adjustable: 0.4 to 1 × In (1A step)

Short circuit protection Isd adjustable: 1.5 to 10 × Ir

Ground fault protection Ig adjustable: 0.2 to 1 × Ir

3. M3 series with leakage protection

Built in leakage protection module, suitable for M3 125, 160, 250

Leakage action current and delay time are the same as M2 series

M4 630: Large capacity panel mounted circuit breaker

The M4 630 series is suitable for main distribution cabinets, with a rated current of 250-630A and a breaking capacity of 36-100kA.

1. Thermal magnetic version

Rated current: 250A, 320A, 400A, 500A, 630A

Breaking capacity: F (36kA), N (50kA), L (100kA)

Attachment support: auxiliary contacts, alarm contacts, shunt release, undervoltage release, electric operating mechanism

2. Electronic version

Support Li, Lsi, Lsig protection

Measurement function: integrated display of parameters such as current, voltage, power, and electrical energy

Communication interface: MODBUS RS485

3. Leakage protection

Implemented by installing a leakage module at the bottom, suitable for 400A and 630A specifications

Module models: GS400-630, GL400-630

Provide 50% I Δ n pre alarm signal output

M5 1600: Main incoming circuit breaker

M5 1600 is the largest capacity model in the MEGATIKER series, suitable for incoming line protection of main distribution cabinets.

Rated current: 500A, 630A, 800A, 1000A, 1250A, 1600A

Breaking capacity: N (50kA), H (70kA), L (100kA)

Electronic protection: Li, Lsi, Lsig, supports high-precision adjustment

Measurement function: Full power measurement, including total harmonic distortion (THD)

Pull out version: supports live plugging and easy maintenance

Installation method and accessories

The MEGATIKER series offers a variety of installation and accessory options to meet different application needs.

1. Installation method

Fixed: directly installed on the panel or DIN rail

Plug in: Installed through a dedicated base for quick replacement

Pull out type: equipped with an operating handle, with three positions for connection, testing, and disconnection, supporting locking function

2. Electrical accessories

Auxiliary contact: indicates the opening and closing status of the circuit breaker

Alarm contact: indicating the trip status

Split release: remote control disconnection

Undervoltage release: automatically disconnects when the voltage is too low

Electric operating mechanism: supports remote closing and opening of switches

3. Mechanical accessories

Rotating handle: direct and extended, supports emergency release

Mechanical interlocking: used for interlocking between two circuit breakers

Locking device: padlock, key lock, to prevent accidental operation

4. Connect attachments

Wiring terminals: front wiring, rear wiring, long terminals

Cable clamp: suitable for copper and aluminum cables, supporting single or double cables

Protective cover: IP2X protection level, ensuring safe wiring

Release curve and selective protection

The MEGATIKER series offers multiple release curves to ensure coordinated protection with upper and lower level equipment.

1. Thermal magnetic release curve

Overload protection: bimetallic strip with cold and hot characteristics

Short circuit protection: electromagnetic trip, instantaneous action

Typical curves: M1 160, M2 250, M3 series M4 630、M5 1600

2. Electronic release curve

Long delay (L): Ir and tr are adjustable to achieve precise overload protection

Short delay (S): Isd and tsd are adjustable to achieve selective protection

Instantaneous (I): Ii fixed or adjustable

Ground fault (G): Ig and TG are adjustable

3. Logic and dynamic selectivity

Logical selectivity: achieved through communication between electronic release devices, ensuring complete upstream and downstream selection

Dynamic selectivity: By adjusting the trip delay, achieve high-level selectivity

Environmental adaptability

The MEGATIKER series products have undergone rigorous environmental testing and are suitable for various working conditions:

Working temperature: -25 ° C to+70 ° C

Storage temperature: -25 ° C to+85 ° C

Humidity: 95% RH, no condensation

Capacity reduction at altitude: Capacity reduction is required for altitudes above 2000m, with a maximum of 5000m

Electromagnetic compatibility: Compliant with IEC EN 60947-2 standard, insensitive to electromagnetic interference

Isolation switch and motor protection circuit breaker

1. Isolation switch (MS and MW series)

MS series: M1 160, M2 250, M3 125/160/250, M4 630, M5 1600

MW series: MW63, MW160, MW250, MW630, MW1600

Features: Visual breakpoint, high short-term withstand current, suitable for isolation use

2. Motor protection circuit breaker (MP series)

MP1 160：16-63A， Electromagnetic protection only

MP2 250：100-250A， Electromagnetic protection only

MP3 250：6.3-220A， Electromagnetic protection only

MP4 630：400-630A， Electromagnetic protection only

MP5 1600：800-1000A， Electromagnetic protection only

Application: Suitable for direct starting of electric motors, used in conjunction with contactors

Application scenarios and selection suggestions

The MEGATIKER series is widely used in the following scenarios:

Industrial power distribution: main incoming cabinet, distribution cabinet, motor control center

Building electrical: high-rise buildings, commercial complexes, data centers

Infrastructure: Rail transit, airports, hospitals

OEM equipment: compressors, pump stations, air conditioning units

When selecting, it is recommended to consider the following factors:

Rated current: selected according to the load current

Breaking capacity: selected based on system short-circuit current

Protection function: Do you need electronic release, grounding protection, and measurement function

Installation method: fixed, plug-in or pull-out

Attachment requirements: auxiliary contacts, electric operation, interlocking, etc