SIEMENS VL400

Product Overview
The SIEMENS VL400 is a SENTRON 3VL molded case circuit breaker designed for low-voltage power distribution protection, built to comply with IEC, UL and CE electrical industry standards. Built for distribution overload protection, short-circuit fault interruption, power circuit isolation switching, this robust panel-mounted circuit breaker withstands cabinet temperature fluctuation, dust and mechanical vibration, delivers stable 24/7 continuous operation, and serves as core power protection hardware for industrial power panels, marine main switchboards, pumping stations and factory low-voltage distribution systems.

Featuring adjustable thermal-magnetic or electronic trip unit, high-performance arc quenching chamber, optional auxiliary contact and alarm switch, and front manual operating handle with status indicator window. It supports fixed, plug-in or withdrawable installation inside low voltage switchgear cabinets, adapting to limited installation space in industrial power control rooms and marine power distribution cabinets. The modular assembly allows separate replacement of trip unit and auxiliary accessories without full distribution system shutdown, greatly reducing equipment downtime for service. Equipped with adjustable overload current setting, high short-circuit breaking capacity & embedded self-diagnostic routine, mature hardware structure restricts fault current surge and guarantees dependable power distribution protection performance during continuous duty.

For dependable distribution overload protection, short-circuit fault interruption, power circuit isolation switching, VL400 continuously monitors load current of distribution circuits, trips automatically when overload occurs, quickly interrupts dangerous short-circuit current, and can isolate power circuits for maintenance work. Reliable distribution overload protection, short-circuit fault interruption, power circuit isolation switching, premium industrial-grade insulating and conductive components provide excellent long-term operational stability, extending service life in harsh industrial and marine power cabinet working environments. Practical adjustable overload current setting, high short-circuit breaking capacity & embedded self-diagnostic routine, maintenance technicians can inspect breaker status and verify protection parameters during routine power distribution equipment inspection and overhaul.

During continuous distribution overload protection, short-circuit fault interruption, power circuit isolation switching, this molded case circuit breaker is fully compatible with Siemens low-voltage switchgear, power monitoring units and factory DCS control platforms. Stable distribution overload protection, short-circuit fault interruption, power circuit isolation switching, mature Siemens SENTRON VL molded case breaker technology with easy spare parts replacement and convenient after-sales maintenance. Robust adjustable overload current setting, high short-circuit breaking capacity & embedded self-diagnostic routine, simplifies power cabinet layout and reduces installation workload for industrial power distribution retrofitting and low voltage system overhaul projects.

Technical Specifications Brand: SIEMENS Model: VL400 Product Type: SENTRON 3VL Molded Case Circuit Breaker Mounting: Switchgear panel mount, fixed / plug-in / withdrawable Power Supply: Up to 690V AC Communication: Optional auxiliary signal interface Function: Overload protection, short-circuit protection, circuit isolation, current monitoring, fault alarm, self-diagnosis Protection: Vibration resistance, wide operating temperature, EMC anti-interference, IEC & UL certified Application Field: Industrial low voltage power distribution, marine power switchboard, pump station, factory MCC panel, molded case circuit breaker spare replacement

Key Features Designed for distribution overload protection, short-circuit fault interruption, power circuit isolation switching, panel-mounted molded case circuit breaker for industrial low voltage distribution line protection application. Adopts high efficiency arc quenching system, selectable thermal-magnetic or electronic trip units, multi installation types & front status indication, switchgear installation simplifies layout and reduces wiring work. Equipped with adjustable overload current setting, high short-circuit breaking capacity & embedded self-diagnostic routine, mounting adapts limited industrial power cabinet space. Modular structure allows trip unit and accessory replacement without full distribution system shutdown, cutting equipment downtime. Premium rugged power components resist mechanical shock and temperature variation, stable performance under variable industrial operating conditions and long-hour operation. Spare SIEMENS VL400 circuit breaker for retrofitting and overhaul of industrial low voltage power distribution systems.

Application Scope Power distribution protection unit: molded case circuit breaker performing distribution overload protection, short-circuit fault interruption, power circuit isolation switching, safeguards low-voltage distribution lines and downstream electrical loads for power system operators. Compact switchgear installation: integrated protection and switching unit, optional auxiliary alarm contacts and visible status window, sturdy molded housing saves power cabinet installation space. Low-maintenance continuous operation: flexible protection parameter setting, fault status monitoring & embedded self-diagnostic routine, component replacement without dismantling the whole breaker assembly. Spare-part maintenance: replacement SIEMENS VL400 breaker for overhaul and hardware renewal of industrial low voltage distribution systems.

Package & Delivery Each SIEMENS VL400 molded case circuit breaker is packed with shockproof export carton for electrical power spare parts shipment. Complete delivery includes VL400 main breaker unit; installation manual and maintenance guide are provided for reference. Matching auxiliary contacts, shunt releases and mounting accessories are available as optional spare parts.