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Reliance Electric 805405-1R
Product Name: AutoMax SF3000 single-phase field power module, 805405-1R
Introduction: Panel-mounted SCR field excitation module for DC motor control within Reliance AutoMax systems. It provides adjustable-voltage, current-regulated DC field power and is used together with a three-phase armature power module in a PMI rack.
Detailed content
Technical Specifications: Rated DC field output 15 A. AC input 120 VAC to 460 VAC. Non-reversing bridge type S2. Four SCRs arranged as a full-wave single-phase bridge. Electrically isolated power cube with dv/dt protection. Internal AC line fuses. Self-firing clamp against inductive voltage kick. Optional isolation transformer support. Controlled through AutoMax Programming Executive software. Reference manual S-3060 for SF3000 field power modules.
Function Features: Current-regulated field excitation. Non-reversing DC output. Isolated power section. Built-in fuse and transient protection. Software-controlled SCR firing.
Application Scenarios: DC motor field supply in AutoMax drives. Rolling, winding and process lines using separate armature and field modules. Retrofit and maintenance of Reliance SF3000 power systems.
Performance Parameters: Field output 15 A DC. AC input coverage 120 VAC to 460 VAC. Full-wave SCR rectification. Isolated power cube protection against voltage rate and transient overvoltage.
Material Composition: Power cube with SCR devices. Heat dissipating enclosure. AC line fuses. Control and firing circuitry on printed circuit board. Panel-mount hardware.
Structure Characteristics: Single-phase field module designed for PMI rack installation with a companion armature module. Isolated power section, separate control interface and SCR bridge assembly.
Working Principle: AC input passes through line fuses to the SCR full-wave bridge. The firing circuit regulates SCR conduction angle based on the AutoMax control commands. The bridge produces adjusted DC field current with non-reversing polarity. Protection circuits limit dv/dt, overcurrent and inductive kickback.
Installation Requirements: Mount in the designated PMI rack position with the matching armature power module. Verify AC input voltage within 120 VAC to 460 VAC. Install specified AC line fusing. Connect DC field output to the motor field winding. Configure firing and regulation parameters in AutoMax Programming Executive.
Usage Precautions: Disconnect AC supply and apply lockout/tagout before inspection. Replace AC line fuses only with the specified type and rating. SCR and DC output terminals carry hazardous voltage; use insulated tools and qualified personnel. Ensure adequate ventilation and heatsink cooling. Do not operate above 15 A DC field rating or outside the 120 VAC to 460 VAC input range.
