Mora 4P RCCB 63A

Mora 4P RCCB 63A is a four-pole residual current circuit breaker for compatible three-phase plus neutral AC systems. It monitors the balance of current flowing through the live conductors and can disconnect the circuit when residual current exceeds its rated threshold. Correct selection, earthing and professional installation are essential.

Mora 4P RCCB 63A Features

• Four-pole switching: suitable for compatible three-phase and neutral distribution arrangements.
• 63A rated current: confirm that this rating coordinates with the circuit conductors and upstream protection.
• Residual-current protection: helps reduce risk associated with earth-leakage faults when correctly selected and installed.
• DIN-rail mounting: compact installation inside a suitable distribution enclosure.
• Test button: allows routine functional testing according to the device instructions.

Important: RCCB Is Not an Overcurrent Breaker

An RCCB detects residual or earth-leakage current; it does not normally provide overload or short-circuit protection. It must be coordinated with a suitable fuse or MCB/MCCB as required by the installation design. Do not use the 63A marking as evidence of short-circuit protection.

Check the exact device label for rated voltage, rated residual operating current (IΔn), RCCB type, conditional short-circuit rating and applicable standard. The earlier listing mentioned 400V AC, 30mA and a rapid trip time; these values must be verified on the supplied unit rather than assumed for every batch.

Choosing the Correct RCCB Type

Modern loads can produce different residual-current waveforms. Confirm whether the installation requires Type AC, Type A or another RCCB type according to connected equipment and local design requirements. Solar inverters, variable-speed drives, EV equipment and electronic loads may have manufacturer-specific residual-current protection requirements.

Typical Applications

• Compatible three-phase residential distribution boards
• Commercial shops, offices and workshops
• Selected solar-inverter AC distribution circuits
• Schools, apartments and small industrial panels

Neutral, Earthing and Installation Safety

All protected phase conductors and the associated neutral must pass through the RCCB in the correct direction. Do not share the downstream neutral with another circuit, and do not connect neutral to earth after the RCCB. Either mistake can cause nuisance tripping or prevent correct protection.

A qualified electrician should confirm cable size, terminal torque, upstream protection, earthing continuity and the installation’s prospective fault current. An RCCB does not replace a sound earthing system. Use an appropriately rated distribution box with adequate space and environmental protection.

Testing and Maintenance

Use the test button at the interval stated by the manufacturer and installation requirements. The test should trip the RCCB; if it does not, arrange inspection by a qualified electrician and do not assume protection is available. The test button checks the device mechanism but does not replace full electrical testing with calibrated instruments.

Selection Checklist

Before ordering, record the supply voltage, number of phases, load current, conductor size, required residual sensitivity, RCCB type and upstream overcurrent protection. Confirm that the neutral arrangement is compatible and that the enclosure has sufficient DIN-rail space. For inverter-fed circuits, follow the inverter manufacturer’s protection requirements.

Why Buy from HN Electric?

HN Electric supplies electrical protection products across Pakistan with convenient online ordering. Browse more Mora products and compatible protection equipment, or share your panel details with our team before ordering if you need help checking suitability.

Important: Product appearance and electrical markings may vary by batch. Verify the received RCCB and arrange professional installation and commissioning before energizing the circuit.

Buyer note: A lower residual-current threshold is not automatically suitable for every circuit, and a higher threshold may not provide the intended additional protection. Device sensitivity, selectivity and time delay must be chosen from the installation design and applicable electrical requirements.

Mora 4P RCCB 63A FAQs

Does this RCCB protect against overload and short circuit?

No. The Mora 4P RCCB 63A is intended to detect residual current in a compatible three-phase system. It normally needs correctly rated upstream overcurrent protection such as an MCB, MCCB or fuse.

What does four-pole switching mean?

A compatible 4P arrangement can disconnect three phase conductors and neutral together. The actual supply configuration, neutral treatment, direction of connection and terminal markings must be verified before installation.

How should the residual sensitivity and RCCB type be selected?

The required IΔn value and Type AC, Type A or other classification depend on the circuit, connected equipment and manufacturer instructions. Solar inverters, variable-speed drives and electronic loads can require specific residual-current protection.

Who should install and test this RCCB?

A qualified electrician should install, commission and test the Mora 4P RCCB 63A. For general electrical-equipment and safety standards, consult the International Electrotechnical Commission. The test button does not replace instrument testing.