SIEMENS 3VF3211-1BW41-0AB1 Product Description

Overview

SIEMENS 3VF3211-1BW41-0AB1 is a 3-pole molded case circuit breaker of the Siemens 3VF series for plant distribution protection. SIEMENS 3VF3211-1BW41-0AB1 is equipped with adjustable thermal overload and adjustable magnetic short-circuit release, used for cable and load branch protection in industrial low-voltage distribution systems. SIEMENS 3VF3211-1BW41-0AB1 is a discontinued legacy model, widely used as spare replacement for old distribution cabinets.

Features

SIEMENS 3VF3211-1BW41-0AB1 supports adjustable thermal setting range 125A–160A, and adjustable instantaneous magnetic trip from 800A to 1600A. It has rated ultimate short-circuit breaking capacity 40kA at 415V AC. The front rotary handle provides clear ON, OFF and trip status indication for on-site inspection. SIEMENS 3VF3211-1BW41-0AB1 can be fitted with optional accessories including auxiliary contact, alarm contact, shunt trip coil and undervoltage release for remote tripping and status feedback to PLC and SCADA. It adopts fixed mounting structure and conforms to IEC 60947-2 standard. The suffix -0AB1 indicates it is pre-installed with auxiliary/alarm switch assembly compared to the base -0AA0 version.

Specs

Brand: SIEMENS Model: 3VF3211-1BW41-0AB1 Product series: 3VF Product category: Molded case circuit breaker Pole count: 3 poles Frame rating: 160A Thermal adjustment: 125–160A Magnetic adjustment: 800–1600A Icu (415V AC): 40kA Standard: IEC 60947-2 Lifecycle: Discontinued Remark: With auxiliary / alarm contact assembly

Principle

SIEMENS 3VF3211-1BW41-0AB1 continuously monitors the three-phase current of the distribution circuit. When overcurrent lasts for a period, the thermal bimetallic element deforms and triggers delayed overload trip. When severe short-circuit occurs, the magnetic trip unit acts instantly and opens the main contacts. SIEMENS 3VF3211-1BW41-0AB1 isolates the fault circuit to protect downstream cables and equipment. Auxiliary and alarm contacts change state synchronously to transmit fault signals to the control system.

Applications

SIEMENS 3VF3211-1BW41-0AB1 is used for low-voltage distribution branch protection. It is commonly installed in factory main distribution rooms, MCC panels, pump and fan control cabinets, and chemical process power distribution systems. It is used for cable protection, feeder protection and overhaul spare replacement of existing 3VF distribution cabinets.