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ABB FH204 AC-63/0.03 2CSF204006R1630 Residual Current Circuit Breaker (RCCB) 

1. Key Parameters

• Product Model: FH204 AC-63/0.03
• Order Code: 2CSF204006R1630
• Product Series: ABB FH200 Series Residual Current Circuit Breakers (AC Type, Low-Voltage)
• Core Function: Detects AC residual current (leakage current) in electrical circuits; trips within milliseconds to disconnect power when leakage exceeds the rated residual action current; provides supplementary protection against electric shock and leakage-induced fires; compatible with low-voltage distribution systems
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Rated Voltage (Ue)	AC 230V/400V (single-phase/three-phase, 50Hz/60Hz auto-adaptive)	Complies with global low-voltage grid standards
  Rated Current (In)	63A	Matches medium-load distribution circuits (e.g., 3kW~15kW three-phase equipment)
  Rated Residual Action Current (IΔn)	0.03A (30mA)	Critical for personal electric shock protection (safe threshold for human body)
  Rated Residual Non-Action Current (IΔno)	≤0.5×IΔn (15mA)	Prevents false tripping from normal leakage (e.g., capacitor discharge)
  Tripping Time	≤0.1s (at IΔ = 5×IΔn, 150mA); ≤0.3s (at IΔ = 2×IΔn, 60mA)	Meets IEC 61008-1 fast tripping requirements for shock protection
  Breaking Capacity (Icn)	6kA (at AC 230V); 4.5kA (at AC 400V)	Withstands short-circuit current during tripping, avoiding device damage
  Pole Configuration	4P (four-pole: L1, L2, L3, N; disconnects all poles when tripping)	Suitable for three-phase four-wire systems (common in industrial/commercial grids)
  Residual Current Type	AC type (detects sinusoidal AC residual current)	Optimized for traditional AC electrical equipment (e.g., motors, heaters, household appliances)

• Mechanical Specifications:
  • Housing Material: Flame-retardant thermoplastic (UL94 V-0); high-impact resistance (IK08)
  • Dimensions (W×H×D): 85mm × 88mm × 74mm (DIN rail-mountable, compatible with 35mm standard rails)
  • Mounting: DIN rail-mounted (TS 35/7.5 or TS 35/15); snap-on installation (no tools required)
  • Weight: Approximately 320g
  • Operation Interface:
    • Toggle switch: "ON" (green indicator) / "OFF" (red indicator) / "TEST" (yellow test button)
    • Test button: Manual simulation of 5×IΔn (150mA) leakage current to verify tripping function
• Environmental Ratings:
  • Operating Temperature Range: -25℃~+60℃ (-13℉~140℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: ≤95% RH (non-condensing, 40℃; suitable for damp environments like basements)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; no false tripping or mechanical damage)
  • Shock Resistance: 15g acceleration (11ms duration, IEC 60068-2-27; maintains tripping accuracy)
• Compliance Standards: IEC 61008-1 (residual current operated circuit breakers), EN 61000-6-2 (EMC immunity), UL 1053 (ground fault circuit interrupters), CE, RoHS, GB 16916.1 (Chinese national standard for RCCBs)

2. Key Features

• Personal Safety Priority (30mA IΔn): Rated residual action current of 0.03A (30mA) is the internationally recognized safe threshold for human electric shock protection—trips within 0.1s when leakage occurs, minimizing the risk of fatal electric shock (especially for personnel in industrial workshops or residential areas).
• Fast Tripping Response: ≤0.1s tripping time at 5×IΔn (150mA) ensures rapid power disconnection, preventing thermal damage to electrical equipment (e.g., motors, cables) from prolonged leakage and reducing fire hazards caused by overheated insulation.
• 4-Pole Full Disconnection: 4-pole (L1/L2/L3/N) configuration disconnects all live and neutral wires simultaneously when tripping—avoids residual voltage on the neutral line (a common cause of secondary electric shock) in three-phase four-wire systems.
• Anti-False Tripping Design: Rated residual non-action current (IΔno ≤15mA) and built-in EMI filtering suppress false tripping from normal electrical noise (e.g., capacitor discharge in motor startup, harmonic interference from VFDs)—ensures stable operation in industrial electrical environments.
• Flame-Retardant & Impact-Resistant Housing: UL94 V-0 flame-retardant material prevents housing combustion in case of internal arcing; IK08 impact resistance withstands accidental collisions in distribution cabinets—enhances device durability in harsh installation sites.
• Manual Test Function: Dedicated "TEST" button simulates 5×IΔn leakage current to verify tripping performance—enables regular on-site testing (recommended monthly) without additional tools, ensuring the RCCB is always in a valid protection state.
• Global Grid Compatibility: AC 230V/400V dual-voltage support and 50Hz/60Hz auto-adaptation make it suitable for global low-voltage grids (e.g., 230V single-phase in Europe, 400V three-phase in China, 60Hz grids in North America)—simplifies international project procurement and deployment.

3. Application Fields

• Industrial Low-Voltage Distribution: Primary application—safety protection for industrial circuits:
  • Workshop Equipment Protection: Installed in ABB MNS switchgear to protect 3-phase industrial equipment (e.g., 5kW~12kW motors, 8kW heating furnaces); 4-pole disconnection ensures all poles are cut off during leakage, preventing electric shock to operators maintaining machinery.
  • PLC Control Cabinet Safety: Integrated into ABB S800 distribution boards for AC500 PLC power circuits; anti-false tripping design resists EMI from VFDs and sensors, ensuring the RCCB does not trip due to normal electrical noise—guarantees uninterrupted operation of automated production lines.
• Commercial Building Electrical Systems: Safety protection for public areas:
  • Office & Mall Distribution: Used in commercial distribution boards to protect lighting circuits (AC 230V) and small power sockets (e.g., for computers, printers); 30mA IΔn protects office staff from electric shock caused by damaged socket insulation.
  • Hotel & Hospital Auxiliary Circuits: Installed in hotel guest room or hospital non-critical auxiliary circuits (e.g., HVAC fans, water heaters); 4-pole disconnection eliminates neutral line residual voltage, reducing electric shock risks for guests or maintenance personnel.
• Residential Electrical Networks: Home safety protection:
  • High-Power Appliance Circuits: Protects 3-phase household equipment (e.g., 7kW heat pumps, 5kW electric water heaters) in large residences; fast tripping (≤0.1s) prevents fire hazards from leakage in aging appliance wires.
  • Apartment Building Distribution: Deployed in residential building floor distribution boxes to protect shared circuits (e.g., public lighting, elevator auxiliary power); wide temperature range (-25℃~+60℃) adapts to basement or rooftop distribution cabinet environments.
• Infrastructure Auxiliary Systems: Safety for critical infrastructure:
  • Water Treatment Plant Auxiliaries: Protects 3-phase pump circuits (e.g., 3kW~10kW booster pumps) in water treatment facilities; humidity tolerance (≤95% RH) withstands damp pump room environments, ensuring continuous water supply.
  • Solar Inverter Distribution: Installed in small-scale solar PV system distribution boards (AC side, 230V/400V); anti-interference design resists inverter harmonic noise, preventing false tripping and ensuring stable power feed-in to the grid.

4. Precautions

• Current & Voltage Matching: Ensure the RCCB’s rated current (63A) matches the maximum load current of the circuit—using it for circuits with >63A load (e.g., 20kW three-phase motors) will cause overheating and damage the internal current transformer. Verify load current via a clamp meter before installation.
• Residual Current Type Selection: The FH204 is an AC-type RCCB (only detects sinusoidal AC leakage). Do not use it in circuits with non-sinusoidal residual current (e.g., DC leakage from LED drivers, variable-frequency leakage from EV chargers)—choose ABB’s A-type or B-type RCCBs (e.g., FH204 A-63/0.03) for such scenarios to avoid protection failure.
• Installation & Wiring:
  • Polarity Compliance: Connect live wires (L1/L2/L3) to the "LINE" side and load wires to the "LOAD" side; reverse wiring will cause the RCCB to fail to trip during leakage (neutral line remains live). Refer to the wiring diagram on the device housing.
  • Neutral Line Must Pass Through: Ensure the neutral line (N) is connected to the dedicated neutral pole—omitting the neutral line or connecting it to a live pole will disable residual current detection, rendering the RCCB ineffective.
  • Grounding Requirement: The RCCB does not replace protective grounding (PE)—ensure all electrical equipment is properly grounded (PE resistance ≤4Ω). The RCCB protects against leakage, while grounding diverts leakage current to earth, providing dual safety guarantees.
• Operation & Maintenance:
  • Monthly Test: Press the "TEST" button monthly to verify tripping function—if the RCCB does not trip, immediately power off the circuit and replace the device (internal fault may have occurred, such as current transformer damage).
  • Tripping Handling: When the RCCB trips, first disconnect all loads, then reset the toggle switch. If it trips again, use a leakage current tester to locate the fault (e.g., damaged wire insulation, faulty appliance) before restoring power—do not force reset repeatedly to avoid fire.
  • Avoid Overloading: Do not use the RCCB as an overload or short-circuit protector (it lacks thermal-magnetic overload protection). Install it in series with a miniature circuit breaker (MCB, e.g., ABB S200 series, 63A) to provide comprehensive protection against leakage, overload, and short-circuit.
• Environmental Limitations:
  • Temperature & Humidity: Do not operate above +60℃ or below -25℃, or in condensing humidity (>95% RH with condensation)—high temperatures reduce tripping sensitivity, while condensation causes internal corrosion, leading to false tripping or insulation failure.
  • Chemical Exposure: Avoid installation in environments with corrosive gases (e.g., sulfur dioxide in battery rooms, ammonia in cold storage)—corrosive gases damage internal metal components, shortening the RCCB’s service life. Choose ABB’s corrosion-resistant RCCBs (e.g., with IP65 protection) for such environments

The structure and details of the product：

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