RELIANCE 86466-12S three-phase full-controlled SCR thyristor rectifier stack
86466-12S is three-phase full-controlled SCR thyristor rectifier stack under Reliance FlexPak3000/MaxPak Plus DC drive power series, matched with 846723T main control board,847216-R/S field excitation PCB,847492-V auxiliary power board and 86007-A dynamic brake control board to compose complete armature power unit. Original OEM production is permanently discontinued; market supply covers surplus new original spare parts and full-load bench tested refurbished units. It undertakes armature AC-DC phase-shift rectification with integrated dynamic brake switching circuit for mid-range horsepower DC motor closed-loop speed regulation and regenerative braking energy dissipation. S stands for factory optimized upgraded version with enhanced internal surge suppression circuit and reinforced component fixation structure, interchangeable alternative part codes:86466-12,86466-12R.
Description
1. Product Brief Introduction
86466-12S is three-phase full-controlled SCR thyristor rectifier stack under Reliance FlexPak3000/MaxPak Plus DC drive power series, matched with 846723T main control board,847216-R/S field excitation PCB,847492-V auxiliary power board and 86007-A dynamic brake control board to compose complete armature power unit. Original OEM production is permanently discontinued; market supply covers surplus new original spare parts and full-load bench tested refurbished units. It undertakes armature AC-DC phase-shift rectification with integrated dynamic brake switching circuit for mid-range horsepower DC motor closed-loop speed regulation and regenerative braking energy dissipation. S stands for factory optimized upgraded version with enhanced internal surge suppression circuit and reinforced component fixation structure, interchangeable alternative part codes:86466-12,86466-12R.
2. Model Definition
86466: Universal base part number for Reliance FlexPak3000 series armature SCR rectifier power stack;12: Current rating code for rated 35ADC continuous DC armature output;S: Factory revised upgraded specification with improved internal wiring layout and upgraded RC overvoltage absorption network, cross compatible with R suffix variant of same base number.
3. Technical Specifications
Three-phase AC input:208/230/460VAC,50/60Hz; nominal rated DC output voltage 230VDC, continuous rated armature DC output 35ADC, 60-second short-term overload capacity 52.5ADC(150% overload rating). Equipped with large-size single-side vertical aluminum fin air-cooled heat sink, internally configured six industrial grade SCR thyristors plus complete RC surge absorption components and built-in dynamic brake power switch module. Operating ambient temperature range -12℃~+72℃, non-condensing relative humidity 5%~95%; overall dimension 212mm×138mm×88mm, net weight approx 1.12kg; dielectric withstand voltage between high-voltage AC terminals and low-voltage trigger control terminals ≥2800Vrms.
4. Interface and Communication Configuration
Thick copper bolt terminals for three-phase mains AC input and DC armature positive/negative high-current power wiring; miniature screw terminal strip for trigger pulse input from master control PCB and brake fault hardwire feedback signal. No fieldbus or serial digital communication ports; all power and control signals adopt discrete hard-wired connection only.
5. Core Functions
Receive phase-shift trigger pulses transmitted from 846723T main control board to implement three-phase full-wave SCR phase-controlled rectification, convert industrial three-phase AC into continuously adjustable DC voltage to realize closed-loop speed control of mid-range DC armature motor. Cooperate with 86007-A brake control PCB: when DC bus voltage exceeds preset threshold under no-load armature condition, internal integrated brake switch turns on to connect external braking resistor and consume regenerative energy during motor deceleration and stop operation. Built-in full-range RC absorption network suppress instantaneous surge overvoltage to prevent SCR breakdown; meanwhile collect overheat and overcurrent interlock signals and feed back to main control board to trigger drive fault protection shutdown.
6. Application Scenarios
Standard matching rectifier spare for FlexPak3000/MaxPak Plus 7.5~25HP medium-size DC drive cabinets; widely used for fault replacement maintenance of textile spinning machinery, medium plastic extruder, medium wire drawing equipment and industrial auxiliary conveying DC drive power module overhaul.
7. Operation and Maintenance Instructions
Cut off cabinet three-phase AC total power and keep waiting more than 50 minutes for full residual charge discharge of internal high-voltage bus capacitor before disassembly to avoid high-voltage electric shock hazard. Semi-annual routine maintenance: blow away dust accumulated on heat sink fins with dry low-pressure compressed air, strictly prohibit liquid cleaning solvent contacting internal SCR chips and high-power resistance components. After field replacement installation, complete static trigger signal inspection and no-load DC voltage calibration prior to full-load motor commissioning; store spare rectifier stacks inside sealed anti-static bags under constant-temperature dry warehouse to prevent internal power component insulation deterioration caused by dampness.
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