ABB

1.Core Functions

Basic Circuit Switching for Power Distribution Acts as main or branch circuit switch inside low-voltage power distribution cabinets, supporting manual & motorized closing and opening. Draw-out version enables live isolation for maintenance without full-circuit power cut, improving maintenance safety.
Complete 4-Stage Electrical Protection (Standard with Electronic Trip Units)
Long-Time Delay Overload Protection (L): Trips with delay under sustained overload to prevent cable and transformer overheating, with continuously adjustable threshold.
Short-Time Delay Short-Circuit Protection (S): Brief delay upon downstream short-circuit to realize selective coordination between upstream & downstream breakers; only faulty circuit cuts off to avoid full plant blackout.

Instantaneous Short-Circuit Protection (I): Millisecond rapid breaking for severe short-circuit current to prevent busbar ablation and fire hazards.
Earth Fault Protection (G): Precise tripping under leakage or ground short-circuit for personal safety and equipment fire prevention.
EFDP Early Fault Prediction (Exclusive for High-End Electronic Trips) Early Fault Detection & Prevention algorithm predicts short-circuit trends and greatly enhances zone selectivity. Even breakers of identical frame size achieve selectivity up to 100 kA, reducing required upstream breaker specifications.

Specialized Protection for Heavy-Duty Motors Matched with motor-dedicated trip units for large fans, water pumps and compressors; provides stall protection, startup delay and three-phase unbalanced current protection to avoid motor burnout.
Energy Metering & Industrial Fieldbus Communication PR332/P intelligent trip unit integrates power data acquisition to monitor real-time voltage, current, power and energy consumption. Modbus communication supported for remote monitoring and remote tripping/closing via PLC and SCADA systems.
Wide Compatibility for AC & DC Applications

AC applications: Factory power distribution, front-end protection for variable frequency drives;
DC applications: Dedicated versions for photovoltaic energy storage cabinets, DC charging piles and DC motor circuits up to 1000 V DC.

Comprehensive Safety Mechanical & Electrical Accessories Motorized operating mechanisms, spring-charged closing, padlock anti-misoperation, mechanical interlock (prevents parallel connection of dual power sources), undervoltage release (auto trip during power failure), shunt trip (remote emergency cut-off), residual current protection modules.
Multiple Mounting Types for Cabinet Adaptation Fixed type (cost-effective), plug-in type (fast replacement), draw-out type (for high-end data centers & power plants, extractable isolation for maintenance). Uniform cabinet depth and unified accessories simplify cabinet layout design.

Low-Voltage Main Distribution Cabinets for Industrial Plants Main switch for low-voltage outlet of factory transformers and protection for heavy-current workshop branch circuits, carrying 800~1600 A high-power distribution.
PV & Energy Storage DC Combiner Cabinets Front-end DC protection for central inverters; dedicated T6 PV variant withstands 1000 V DC, the mainstream high-current MCCB for photovoltaic power stations.
Power Distribution for Data Centers & Commercial Complexes Main distribution trunk protection for IDC computer rooms, shopping malls and office buildings. Draw-out design allows segmented maintenance without full power loss; selective protection guarantees uninterrupted power supply.
Large Motor Protection for Power Plants, Water Treatment & Mining Main circuit switch for large water pumps, induced draft fans, ball mills and belt conveyors, providing full-range protection against overload, stall and short circuit.

Power Distribution Systems for Vessels & Offshore Platforms Marine-certified variants with anti-vibration and salt-fog resistance, serving as main switches for high-power loads in engine rooms.
New Energy Charging Stations & DC Load Equipment Overload and short-circuit protection for high-power DC charging piles and electrolysis DC equipment.
OEM Complete Control Cabinets & VFD Matching Input protection switch for high-power ABB ACS880 variable frequency drives, inlet protection for large automation production line control cabinets.
Emergency Power Supply & UPS Uninterruptible Power Systems Main circuit protection for UPS output and diesel generator power distribution cabinets to stabilize backup power supply.