3 Phase RCBO

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3 Phase RCBO

The 3-phase RCBO (Residual Current Circuit Breaker with Overcurrent Protection) is a compact, dual-function device designed for AC 50/60Hz systems, supporting rated voltages up to 400VAC and currents from 6A to 63A. It integrates overcurrent protection (for overloads/short circuits) with residual current detection (for earth faults/leakage), safeguarding against electrical fires, shocks, and equipment damage in 3-phase circuits.

YCB7NLE-63 RCBO

6–63A | 1P+N/2P/3P/3P+N/4P | 230/400V AC | 50/60Hz | IP20

YCB7LE-125 RCBO

63–100A | 1P+N/2P/3P/3P+N/4P | 230/400V AC | IEC/EN 60947-2

YCB7LE-63 RCBO

6–63A | 1P+N/2P/3P/3P+N/4P | 230/400V AC | 50/60Hz | IEC/EN 61009-1

YCB9LE-80M RCBO

1–80A | 1P+N/3P+N | 230/400V AC | 50/60Hz | EC/EN 61009-1

Why Choose

CNC 3 Phase RCBO

The YCB7NLE-63 3P (3-pole) RCBO (Residual Current Circuit Breaker with Overcurrent Protection) is an electronic-type device designed for AC 50/60Hz systems, supporting a rated voltage of 400VAC and rated currents from 6A to 63A.

Tripping Types: Available in B (3-5In), C (5-10In), and D (10-20In) thermal-magnetic release characteristics to suit resistive, mixed, or high-inrush loads.

Sensitivity & Performance: Rated residual sensitivity (IΔn) ranges from 0.03A to 0.3A; rated short-circuit capacity (Icn) is 4500A, with a break time ≤0.1s under IΔn for rapid response.

Technical Specifications:

Electrical: Rated impulse withstand voltage of 4000V; dielectric test voltage of 2kV; pollution degree 2.

Mechanical: Electrical life of 4000 cycles; mechanical life of 10,000 cycles; IP20 protection; contact position indicator for status visibility.

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FAQ for 3-Phase RCBOs

Q1: What is a RCBO breaker used for?

A: A RCBO (Residual Current Circuit Breaker with Overcurrent Protection) combines two critical functions: protecting against overloads/short circuits (like a standard breaker) and detecting earth faults/leakage currents (like a residual current device). In 3-phase systems, 3-phase RCBOs (e.g., 3 phase rcbo 63a) safeguard high-power circuits in residential, commercial, or industrial settings—ideal for machinery, HVAC units, or workshops requiring dual-layer safety against fires and electric shocks.

Q2: Are RCBO and GFCI the same?

A: No. A GFCI (Ground Fault Circuit Interrupter) focuses only on ground fault detection to prevent shock, while an RCBO (including 3-phase models) adds overload/short-circuit protection in one device. This makes 3-phase RCBOs more versatile for systems where comprehensive circuit management is needed, such as 3-phase workshop equipment.

Q3: What is the disadvantage of a RCBO?

A: RCBOs are typically pricier than basic breakers or standalone RCDs. For example, a 3 phase rcbo price may be higher than a standard 3P breaker, reflecting its integrated design. Additionally, improper sizing (e.g., using a 20a 3 phase rcbo on a 30A circuit) can cause nuisance tripping.

Q4: What is the difference between breaker and RCBO?

A: A standard breaker protects only against overloads/short circuits, while an RCBO (e.g., 20a 3 phase rcbo) adds residual current detection for ground faults. This dual protection makes RCBOs critical for 3-phase circuits in wet environments (e.g., industrial kitchens) or where sensitive equipment requires both current and leakage safeguards.

Q5: Can I use RCBO as main breaker?

A: Yes, if its rated current matches your system’s demand. A 3 phase rcbo 63a, for instance, works well as a main breaker in 3-phase distribution boards for homes, small factories, or commercial buildings, providing centralized protection against overloads, short circuits, and leakage.

Q6: When should an RCBO be used?

A: Use a 3-phase RCBO in circuits requiring both overcurrent and leakage protection—e.g., 3-phase machinery, HVAC systems, or wet areas like workshops. Larger models (e.g., 3 phase rcbo 63a) suit high-power setups, while smaller ones (e.g., 20a 3 phase rcbo) are ideal for lower-demand 3-phase tools.

Q7: Does a 3 phase RCBO need a neutral?

A: It depends on the model. 3-phase RCBOs are available as 3P (no neutral) or 3P+N (with neutral). The 3P version is for balanced 3-phase loads (no neutral needed), while 3P+N includes a neutral terminal for unbalanced systems (e.g., mixed single/3-phase loads in a commercial space).

Q8: Are RCBOs better than RCDs?

A: RCBOs offer greater efficiency. Unlike standalone RCDs (which require a separate breaker), RCBOs integrate both functions, saving space and reducing wiring complexity. For 3-phase systems, this means a 3 phase rcbo 20a can replace a breaker + RCD pair, simplifying installation in compact distribution panels.

Q9: What is the life expectancy of a RCBO?

A: Most 3-phase RCBOs have a mechanical life of 10,000 cycles (no-load operations) and an electrical life of 4,000 load-breaking cycles. With proper installation and maintenance (e.g., avoiding overloading), they typically last 15–20 years in standard environments.