BTicino Megatiker M5 electronic circuit breaker

Lsi type protection

Add short delay protection (S) on the basis of Li:

Short delay protection (S): Short circuit selective protection

Isd adjustable: 1.5 to 10 x Ir (11 levels)

Tsd adjustable: 0, 100, 200, 300, 400, 500 ms

Optional I ² t=K or t=K characteristics

Lsig type protection

Add ground fault protection (G) on the basis of Lsi:

Ground fault protection (G)

Ig adjustable: 0.2 to 1 × In (9 levels) and OFF

Tg adjustable: 0.1s, 0.2s, 0.3s, 0.4s, 0.5s, 1s

2. Measurement function

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

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

USB port: used for local connection and configuration

Communication interface: Supports MODBUS RS485 protocol for remote monitoring

3. Self powered and auxiliary power supply

The electronic protection unit is normally powered by an internal current transformer (CT):

When the current is greater than 12% of the maximum power (single-phase load>20% In), the protection unit operates entirely on its own power supply

The measurement and display function is enabled when the current is greater than 20% of the maximum power (single-phase load>35% In)

To ensure continuous measurement and communication, it is recommended to use an external auxiliary power supply:

External auxiliary power module (M7ALIM)

MODBUS communication interface (M7COM)

Temporary power supply for USB port (5V DC)

4. Self diagnosis and protection

The protection unit has the following self diagnostic functions:

Over temperature protection: triggered when the internal temperature exceeds 95 ° C

Watchdog self-test: detects internal faults in the microcontroller to ensure reliable protection functions

Power loss and derating usage

1. Power loss per pole

In (A) Fixed front wiring (W) Fixed rear wiring (W) Pull out front wiring (W) Pull out rear wiring (W)

500 11.6 11.5 20.0 15.0

630 18.5 18.3 31.8 23.8

800 29.8 29.4 51.2 38.4

1000 47.6 47.0 82.0 60.0

1250 74.4 73.4 128.1 93.8

1600 65.3 58.9 112.6 97.3

2. 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) 50°C 60°C 70°C

500 500 500 500

630 630 630 630

800 800 800 720

1000 1000 1000 900

1250 1250 1250 938

1600 1600 1600 1360

3. 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

4. Environmental adaptability

Climate conditions: comply with Appendix Q, Cat. F of IEC/EN 60947-1

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

Pollution level: Level 3

Accessories and Options

The M5 series offers a wide range of electrical and mechanical accessories to meet different application needs.

1. 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)

2. Auxiliary contacts

Model: M7X01

Contact form: 1NO/NC conversion contact

Rated current: 3A @ 250V AC

Configuration: M5 supports up to 3 auxiliary contacts, 1 fault signal contact, and 1 release

3. Rotate the handle

Type and Model Description

Direct standard M7647 black handle

Variable depth standard T7649 IP55, black

Variable depth emergency T7649E IP55, red/yellow

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

4. Electric operating mechanism

Factory assembled type

Model: M7875P/024, M7875P/048, M7875P/230

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

Installation method: Pre operation

Customer assembly type

Model: 0 261 24 (24V), 0 261 25 (48V), 0 261 26 (110V), 0 261 23 (220V)

Scope of application: In ≤ 1250A

1600A dedicated: 0 261 19 (24V), 0 261 28 (48V), 0 261 29 (110V), 0 261 27 (220V)

5. Connect attachments

Cage terminal

Standard type: M7900/2 (2 × 185mm ² flexible/2 × 240mm ² rigid)

High Capacity Type: M7900/4 (4 × 185mm ² Flexible/4 × 240mm ² Rigid)

Expansion terminal

Short terminal: M7940/2 (500-1250A, maximum 2 busbars per pole)

Long terminal: M7940/3 (1600A, maximum of 3 busbars per pole)

Rear wiring terminal

Rotating: M7960 (3P), M7961 (4P)

Flat panel: M7950 (3P), M7951 (4P)

6. Pull out attachments

Pull out base

Front wiring: M7B25 (3P), M7B26 (4P)

Rear wiring: M7B27 (3P), M7B28 (4P)

Debro lift mechanism (moving parts)

3P：M7B29

4P：M7B30

Pull out attachment

Position signal contact: MT7910N

Pull out the handle: MT7412

Auxiliary contact (12 pins): M7B21

8-pin connector: M7500

7. Electronic version specific attachments

Auxiliary power module

Model: M7ALIM

Input voltage: 24V AC/DC (± 10%)

Installation method: 2 DIN modules

Purpose: To provide external power supply for electronic protection units, ensuring continuous operation of measurement functions