BTicino Megatiker M4 Circuit Breaker

2. Through the energy curve (I ² t)

The allowable energy of the circuit breaker under different expected short-circuit currents is displayed through the energy curve. A lower I ² t value means better protection for downstream equipment, reducing thermal and mechanical stress.

3. Peak current cut-off curve

The peak current cutoff curve shows the peak current that a circuit breaker can limit in the event of a short circuit fault. The curve, with the expected short-circuit current (RMS) as the horizontal axis and the actual allowable peak current as the vertical axis, intuitively reflects the current limiting performance of the circuit breaker.

DC application

M4 circuit breakers and isolating switches are also suitable for DC systems, and the appropriate number of poles in series should be selected according to the voltage level.

1. DC breaking capacity (circuit breaker)

Pole series 60V DC 110V DC 250V DC

1 pole 35 kA --

2-pole series 35 kA 35 kA 35 kA

3-pole series 35 kA 35 kA 35 kA

Note: The above data applies to ungrounded DC networks with voltage tolerances ranging from 0% to+5%.

2. DC usage category (isolating switch)

MS4 isolation switch is suitable for DC-23A use in DC applications. Category:

Pole series 60V DC 110V DC 250V DC 500V DC

1-pole DC-23A --

2-pole series DC-23A DC-23A DC-23A-

3-pole series DC-23A DC-23A DC-23A-

4-pole series connection DC-23A DC-23A DC-23A DC-23A

Compliance and Certification

The Megatiker M4 series products comply with the following standards and regulations:

Product standards: IEC/EN 60947-2 (circuit breaker), IEC/EN 60947-3 (isolating switch)

International certifications: IECEE CB certification, LOVAG certification

Regional certification: CCC (China), EAC (Eurasian Union)

Ship certification: Lloyd's Register, RINA, Bureau Veritas Marine

Environmental directives: REACH, RoHS, WEEE (RAEE)

Environmental Product Declaration: PEP Ecopassport is available

The product label clearly indicates manufacturer information, model code, standard compliance, breaking capacity level (identified by color), barcode and other information for easy on-site identification and traceability.

Application scenarios and selection suggestions

1. Typical applications

Main incoming power distribution: incoming cabinets for factories, commercial buildings, and data centers

Distribution cabinet: Large equipment distribution circuit

Motor control: High power motor starts directly

Power switching: Switching between primary and backup power sources in ATS system

2. Key selection points

Rated current: Select specifications from 250A to 630A based on the load current

Breaking capacity: Select F/N/H/L level based on system short-circuit current

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

Protection function: Do you need leakage protection or electric operation

Attachment requirements: auxiliary contacts, shunt release, rotating handle, interlock, etc

Environmental conditions: Temperature, altitude, humidity need to be considered for capacity reduction