ABB

Main Functions

1. Power switching function: Responsible for manual / electrical closing and opening of main low‑voltage power circuits. Supports draw‑out plug‑in structure for quick disconnection from busbar without dismantling main wiring.
2. Multi‑level protective functions controlled by electronic trip unit: long‑time overload protection, short‑time short‑circuit protection, instantaneous short‑circuit protection, earth‑fault protection. Effectively protects cables, busbars and downstream loads against overload, short‑circuit and ground‑fault damage.More products: www.plcva.com
3. Built‑in measurement module: measures three‑phase voltage, current, active/reactive power, power factor and energy consumption. Local LCD display for real‑time electrical parameter reading.
4. Rich alarm & diagnostic functions: records fault trip logs, overload history, operating cycle counter. Supports remote status feedback, trip signal output for DCS / SCADA system integration.
5. Multiple mechanical & electrical interlocks: prevent mis‑operation during draw‑out / rack‑in process; interlock for opening‑only in disconnected position; mechanical position indicator shows connected / test / disconnected status.
6. Optional accessories: motor spring charging mechanism, shunt trip coil, undervoltage release, auxiliary contact blocks. Supports local push‑button operation and remote electrical control.

Applications & Usage

1. Applied in low‑voltage main distribution cabinets of power plants, petrochemical plants, data centers, large‑scale manufacturing factories, commercial complexes and hospitals. Installed as incoming‑feed breaker or bus‑coupler breaker for main power distribution system.
2. E4S4000 is used for 4000A‑level power distribution loops; E6H4000/E6H5000/E6H6300 are high‑breaking‑capacity large‑current models for heavy‑load main incoming circuits. R‑suffix indicates trip‑unit rated current for load‑matching selection.
3. Guarantees safety and continuity of power supply for critical loads. Quickly trips to isolate fault section under short‑circuit or overload conditions to avoid widespread power‑system damage.
4. These units are widely used as OEM spare replacement parts for industrial facility maintenance. When original air circuit‑breaker fails, the replacement unit restores main‑loop power distribution capability and reduces power‑off downtime.