125A High Current RCBO

PUGO PG47-125 3P+N High Current RCBO is an integrated residual current circuit breaker with overcurrent protection for heavy-duty three-phase four-wire AC distribution systems. It has rated current of 125A and rated AC voltage of 400V, with a breaking capacity of 10kA. The rated residual operating current is 30mA and operating time ≤0.1s, providing fast protection against electric shock, overload and short-circuit faults.

This RCBO adopts C-curve trip characteristic. It complies with IEC60947-2 and GB/T14048.2 standards and carries CE certification. It is equipped with a monthly test button and a reset lock button for safe operation. It supports standard 35mm DIN rail mounting for quick installation. With high-strength flame-retardant housing and reliable breaking performance, it is widely used as main switch in industrial plants and commercial high-power three-phase power distribution cabinets.

Electrical engineers and panel manufacturers responsible for designated main distribution protection have repeatedly encountered these issues:

1. Space cost of separate MCB+RCD under high current -100A main switch requires one MCCB or high current MCB plus a separate 100A RCCB. On the 12 module villa distribution board, this combination occupies 6-8 modular positions without leaving space for surge protection, metering, or branch circuits. The engineer ultimately designed a larger and more expensive casing.

2. Incorrect residual current types can cause interference tripping on modern loads - standard AC RCBO only responds to smooth sinusoidal residual currents. With the injection of pulsating or DC residual current into electric vehicle chargers, variable frequency drive pumps, LED drivers, and photovoltaic inverters, AC units cannot trip (unsafe) or trip unpredictably (annoying). Most buyers do not know what type of load they need.

Confusion between 3.30mA and 300mA -30mA protects individuals; 300mA can prevent insulation layer degradation from causing fires. Using 30mA on long feeders with normal leakage capacitance will cause daily disturbance tripping; Using 300mA on socket circuits can be life-threatening. Suppliers rarely have clear records of their choices.

PUGAO High Current RCBO solves these problems by integrating overcurrent and residual current protection in a 4-module 2P/4P unit, with a standard configuration of 10kA open circuit, thickened copper conductive path, and factory calibrated residual current threshold. We support AC/Type A configuration, 30mA/100mA/300mA sensitivity options, and provide our own brand OEM for your project.

Product interpretation:

PUGO PG47-125 3P+N C125 high current RCBO leakage protection circuit breaker

This is a 3P+N three-phase four wire integrated residual current protection circuit breaker (RCBO), which belongs to the high current specification and integrates air switch and residual current protection.

Parameter analysis item by item

Model PG47-125 C125

PG47-125:125 shell frame high current series; C125: C-type trip, rated current 125A

C-curve: Suitable for conventional loads such as power distribution, motors, lighting, etc., to avoid motor startup tripping errors

400V~: Rated working voltage AC400V, three-phase four wire system

10kA: Rated short-circuit breaking capacity of 10000A, quickly cuts off large short-circuit currents in case of short-circuit faults

I Δ n=30mA, t ≤ 0.1s: rated leakage current 30mA, leakage tripping time ≤ 0.1 seconds, used for personal electric shock protection

Execution standards: IEC60947-2, GB/T14048.2, with CE certification

Button Instructions

Orange: Test button, marked as Test month. It is recommended to press and test the leakage protection function every month

Blue: Leakage lockout reset button, labeled Press before closing. After leakage tripping, this reset button must be pressed to close the circuit

Structure: 3P+N, 3 live wires+1 neutral wire, 3 synchronous disconnection of fire wires, and matching connection of neutral wires; 35mm standard DIN rail installation

Protection function

✅ Overload protection+ ✅ Short circuit protection+ ✅ Leakage (electric shock) protection

Applicable scenarios

High power three-phase four wire distribution: protection for main circuits such as the main incoming line of the factory building, large commercial buildings, high-power central air conditioning, and three-phase power equipment.

⚠️ Only applicable to AC circuits and cannot be directly used for photovoltaic DC circuits.

10kA breaking capacity - why it is important on the main switch

The branch circuit High Current RCBO typically has a breaking capacity of 6kA. At the main incoming line location, the expected short-circuit current may be 10kA or higher, especially in urban areas near distribution transformers.

Pugao specifies 10kA as the standard within the high current RCBO range. This means:

-When a serious short circuit fault occurs in the main position, the device will interrupt the fault current without causing the casing to rupture

-The distribution board remains intact, reducing post fault maintenance to replacing one device

-Small devices do not require upstream selective coordination research

Factory strength

Pugao is a genuine low-voltage electrical equipment manufacturer headquartered in Zhejiang, China, founded in 2011. The factory covers an area of 5000 square meters and produces everything from metal stamping and contact brazing to final assembly and electrical testing internally. ISO 9001 and Intellectual Property Management System Certification.

What does this mean for your RCBO project

1. Internal toroidal transformer winding - The residual current sensing toroidal coil is wound and calibrated internally, rather than purchased as a finished sub component. This controls the consistency of the leakage threshold between batches.

2. Private label OEM - Front laser marking or transfer printing: Your brand logo, model, grade, and CE mark. Large orders can be customized with shell colors.

3. Mixed specification packaging - Distributors with inventory ratings of 40A/63A/80A/100A can request mixed rod and mixed rated cardboard packaging to optimize warehouse inventory.

4. Import compliance documents - CE declaration, IEC 61009-1 test report, batch leakage current calibration data, RoHS declaration. Provide customs clearance services upon request.

5. Flexible order volume - market validation trial orders; Full box goods for retail distribution. We arrange production around your delivery window.

Export packaging and global transportation

The High Current RCBO has rigid metal DIN rail mounting clips and exposed terminal screws. During container vibration, these components may be damaged or displaced.

Packaging Options

1. Standard neutral packaging: Each unit is packed in a separate polyethylene bag and inner box. Heavy duty 5-layer export main cardboard box. The cardboard box size has been optimized for loading 20GP/40HQ.

2. Customized brand cardboard box (OEM): Your logo and product artwork are printed on the outer cardboard box. Customize the label according to your specifications. The minimum order quantity applies.

3. Mixed specification cardboard box: According to your shipping list, multiple grades (40A/63A/80A/100A) are packaged in one main cardboard box.

Shipping and Trade Terms

-Sample order: DHL/FedEx/UPS/TNT door-to-door express delivery.

-Small batch: Air freight to airport or door-to-door air freight.

-Batch orders: FCL/LCL sea freight. Container loading in our factory warehouse. We optimize the loading plan to maximize container utilization.

-Supported trade terms: FOB, CFR, CIF, FOB. Use your own freight forwarder or our long-term partner.

Delivery cycle:

-Stock Standard Rating: 7-12 Business Days

-OEM proprietary brand: 18-28 working days (depending on quantity)

Installation and commissioning precautions

1. Polarity is important - RCBO has marked line (power) and load (downstream) terminals. Reverse connection may cause annoying tripping and may render authentication invalid.

2. N-pole identification - In 4P (3P+N) units, the N-pole is marked with a blue label or "N" mark. Connect N to the N bus; Do not connect N bridge to L.

3. Test button - Press the "T" test button every month. The crew must trip immediately. If it does not trip, please replace the device. The test button simulates residual current faults through an internal test resistor.

4. Copper conductor size - Verify whether the conductor cross-section matches the rated current at 100A and 125A. Regardless of the rated value of the circuit breaker, wires that are too small in size will overheat.

5. Selective coordination - When using a 300mA main RCBO and a 30mA branch RCBO, confirm the delay selectivity according to IEC 61009-2. The standard non selective (S) type may cause the main switch to trip during branch faults.