Weber Protection / Schurter Circuit Breakers and Protection Devices

Engineering selection of modular thermal-magnetic circuit breakers AS168X, compact thermal protectors T11, auxiliary contact blocks, and DC switchgear Weber Protection / Schurter for industrial distribution boards and motor panels.

AS168X Series Thermal-Magnetic Circuit Breakers for Equipment

Weber Protection AS168X thermal-magnetic circuit breakers mount on 35mm DIN rails to deliver selective overcurrent and short-circuit protection. The series spans 1-pole to 4-pole models with trip curves F, G, and H for electrical panels and control loops.

Configurations from 1 to 4 poles with ratings 0.5A to 52A
Short-circuit breaking capacity up to 10kA at 240VAC
Combined bimetallic thermal and electromagnetic trip units
Standard 35mm DIN rail mounting with clamp terminals

T11 Compact Single-Pole Thermal Circuit Protectors

Weber Protection T11 and T12 single-pole thermal circuit protectors safeguard electric drives, transformers, power modules, and PCB assemblies against sustained thermal overloads. Positive trip-free latching design prevents manual contact hold-in during ongoing electrical faults.

Rated operating current range from 0.05A up to 16A
Rated voltage limits 240VAC and 48VDC operational levels
High immunity to motor startup surges and line noise
Threaded neck, snap-in panel, and PCB mounting options

Auxiliary and Signal Contact Add-on Modules AS168X

Modular auxiliary contacts AS168X-ACBH and alarm signal modules AS168X-ACBS attach to the side housing of Weber Protection circuit breakers without specialized tooling. These add-on components generate clean status feedback for industrial PLC systems and remote monitoring supervisory panels.

Auxiliary position indicator modules AS168X-ACBH
Fault trip alarm signal modules AS168X-ACBS
Remote shunt trip modules ACBA for remote actuation
Seamless integration with industrial PLC control loops

High-Current DC Switches and Industrial Disconnectors

Heavy-duty DC disconnect switches Weber Protection Unimat are engineered to isolate and protect heavy industrial DC distribution boards, traction stations, and electrolysis facilities. Reinforced arc chutes with deionizing grids and silver-metal contacts suppress arcs at voltages up to 1000VDC.

DC power switching ratings designed up to 2000A
Operational voltage across main contacts up to 1000VDC
Multi-plate deionizing arc chute blowout chambers
Low contact resistance silver alloy contact buttons

Manual Motor Controllers and Motor Protection Breakers

Weber Protection manual motor controllers combine manual motor starter functions, thermal overload trip units, and instantaneous magnetic trips inside a single compact housing. Devices stop motor burnouts resulting from phase loss, locked pump rotors, or voltage unbalance.

Trip Class 10 protection featuring phase loss sensitivity
Adjustable thermal bimetal dial for precise full-load amps
Instantaneous magnetic trip threshold 11 to 14 times rated
Built-in ambient bimetallic temperature compensation

Diagnostic Inspection, Contact Testing and Breaker Overhaul

Our engineering field team performs structured maintenance on Weber Protection switchgear: micro-ohmmeter contact resistance verification, primary current injection testing of trip mechanisms, inspection of arc chutes, and precision replacement of worn modular contacts under formal contract terms.

Primary current injection bench calibration of trips
Micro-ohmmeter measurement across main contact sets
High-voltage insulation resistance testing at 1000V
Comprehensive overhaul reports and engineering protocol

Maintenance Protocols for AS168X Thermal-Magnetic Breakers

Maintenance protocols for Weber Protection AS168X series circuit breakers preserve tripping selectivity and response speed across industrial automation panels.

Service specialists inspect the mechanical trip-free latching subassembly, verify terminal screw torque using calibrated torque wrenches, and measure pole resistance with digital micro-ohmmeters.

Primary current injection testing confirms that bimetallic thermal strips and electromagnetic solenoids actuate within specified trip curves F, G, and H. When erosion or discolored contact points are detected during overhaul, contact elements undergo scheduled refurbishment.

Contact Inspection and Arc Chute Reconditioning Methods

Heavy-duty industrial operations with frequent switching cycles demand regular examination of main contact assemblies and arc extinguishing chambers.

Field engineers disassemble arc chute packages to clean deionizing splitter plates from carbon soot and metallic condensation, evaluating remaining silver alloy contact thickness.

When contact wear exceeds manufacturer thresholds, contact bridges are renewed while checking contact pressure and opening gap. Post-adjustment verification includes a 1000V insulation resistance measurement across adjacent poles to confirm dielectric integrity.

Testing and Calibration of T11 and T12 Thermal Protectors

Compact single-pole and two-pole thermal protectors Weber Protection series T11 and T12 safeguard auxiliary transformers, DC power modules, and electric drives against extended overcurrent conditions.

Scheduled testing validates time-current response curves under 1.5x and 2.0x overload currents on specialized test benches. Bench calibrations verify predictable bimetal deflection and decisive latch mechanism opening.

In electrical enclosures subject to elevated ambient temperatures, engineers calculate thermal derating factors to prevent nuisance tripping during peak production runs.

Integration and Verification of AS168X Add-on Modules

Snap-on auxiliary contacts AS168X-ACBH and alarm signal modules AS168X-ACBS expand the functionality of Weber Protection circuit breakers, delivering telemetry to plant SCADA networks.

Technical personnel inspect mechanical linkage between actuator levers and breaker trip mechanisms, measuring contact resistance and validating discrete signal transmission into automation inputs.

Remote shunt trip coils type ACBA undergo functional verification at minimum rated control voltage levels, ensuring instant process line shutdown upon emergency trip signals.

Thermal Imaging Inspections and Live Load Diagnostics

Infrared thermographic surveys under live operating loads detect localized hot spots before electrical failures disrupt production lines.

Qualified engineers scan switchgear cubicles using calibrated thermal cameras, identifying abnormal thermal gradients across terminal lugs, disconnect blades, and breaker mouldings.

When excessive heating is identified, connections are retorqued to specified values, mating faces are dressed, and conductive paste is applied. A comprehensive thermal survey protocol with temperature profiles is documented for the client.

Comprehensive Overhaul Procedures and Field Commissioning

Our engineering field department provides complete maintenance, on-site diagnostics, minor repairs, and commissioning for electrical distribution systems incorporating Weber Protection switchgear.

All procedures are executed by qualified electrical engineers adhering to international safety protocols. Service scope includes equipment condition assessments, selectivity coordination checks, short-circuit trip verification, operating mechanism adjustments, and auxiliary alarm loop commissioning.

Clients receive formal engineering test protocols and technical handover reports upon completion.

Weber Protection and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Weber Protection and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.