CROWN Residual Current Circuit Breaker (RCCB) FEC 99 Series 2P/4P 40A-100A 30mA/100mA Excellent for DB Board Safety and Reliable Usage

Description

CROWN Residual Current Circuit Breaker (RCCB) FEC 99 Series 2P/4P 40A-100A 30mA/100mA Excellent for DB Board Safety and Reliable Usage

The CROWN FEC 99 Series Residual Current Circuit Breakers (RCCB) offer an essential earth leakage protection solution designed for residential, commercial, and industrial electrical distribution boards.

Manufactured by Crown, a trusted name in circuit protection devices, this series safeguards users against electric shock and protects electrical equipment against earth fault leakage currents.

The FEC 99 series encompasses both 2-Pole (single-phase) and 4-Pole (three-phase) modules rated for 50Hz electrical installations.

Current capacity options include 40 Amp and 63 Amp models for 2-pole units, alongside 40 Amp, 63 Amp, and 100 Amp models for 4-pole configurations.

To accommodate various sensitivity requirements, the breakers are available with 0.03A (30mA) residual operating current sensitivity for direct personnel protection, as well as 0.1A (100mA) sensitivity for broader equipment protection and general mains distribution circuits.

Engineered with a residual non-operation current rating of 0.51 Δn ~ 1 \Delta n$ and a residual conditional short-circuit current capacity of 3000A to 6000A, each device is built to handle standard operational stresses.

They feature a mechanical lifespan rated for 10,000 switching operations, providing dependable service over long installation periods.

Designed for standard DIN-rail mounting inside consumer units and DB boards, the Crown FEC 99 RCCB series ensures standard-compliant safety, proper earth fault detection, and practical circuit protection across modern power distribution networks.

Product Detail

Frequently Asked Questions (FAQ)

• Q: What is the main function of an RCCB compared to an MCB?

  A: An RCCB (Residual Current Circuit Breaker) detects earth leakage currents to protect individuals from electric shock and prevent electrical fires caused by insulation breakdown. An MCB (Miniature Circuit Breaker) protects wires and equipment from overloads and short circuits.

• Q: When should I choose 30mA sensitivity over 100mA sensitivity?

  A: 30mA (0.03A) sensitivity is designed for personal protection in branch circuits (such as power sockets, water heaters, and damp areas) because it trips quickly at low leakage levels to prevent human injury. 100mA (0.1A) sensitivity is typically used at the main incoming switchboard level or for general lighting circuits to protect against fire hazards without excessive nuisance tripping.

• Q: What is the difference between 2-Pole and 4-Pole RCCBs?

  A: 2-Pole RCCBs are used for single-phase electrical supply systems (common in homes). 4-Pole RCCBs are designed for three-phase electrical systems (common in commercial buildings, factories, or larger residences).

• Q: How long is the mechanical life of the Crown FEC 99 RCCB?

  A: The FEC 99 series RCCBs are rated for a mechanical life of up to 10,000 operations, ensuring durability over long-term usage.

• Q: Can these RCCBs fit standard distribution board enclosure rails?

  A: Yes, all FEC 99 RCCBs are standard modular units designed to snap onto standard DIN-rail mountings inside distribution boards and consumer boxes.