RELIANCE 86466-47S（Alternate PN：8646647S）medium-high current three-phase full-controlled SCR thyristor rectifier stack
86466-47S is medium-high current three-phase full-controlled SCR thyristor rectifier stack for Reliance FlexPak3000/MaxPak Plus DC drive power unit, matching 846723T main control board, 847216-R/S field excitation PCB, 847492-V auxiliary power board and 86007-A dynamic brake board to constitute complete armature power assembly. Original OEM production is permanently discontinued; available stock includes original surplus new parts and full-load bench-tested refurbished modules. Cross-replaceable part codes:86466-47,86466-47R,86466-47T,86466-47V. S suffix denotes built-in RC surge suppression optimized version with reinforced overvoltage absorption circuit to restrain instantaneous line surge, designed for unstable grid industrial sites. It performs three-phase AC to adjustable DC phase-controlled rectification with integrated dynamic brake circuit for heavy-duty DC motor speed control and regenerative energy dissipation during deceleration.
Description
1. Product Brief Introduction
86466-47S is medium-high current three-phase full-controlled SCR thyristor rectifier stack for Reliance FlexPak3000/MaxPak Plus DC drive power unit, matching 846723T main control board, 847216-R/S field excitation PCB, 847492-V auxiliary power board and 86007-A dynamic brake board to constitute complete armature power assembly. Original OEM production is permanently discontinued; available stock includes original surplus new parts and full-load bench-tested refurbished modules. Cross-replaceable part codes:86466-47,86466-47R,86466-47T,86466-47V. S suffix denotes built-in RC surge suppression optimized version with reinforced overvoltage absorption circuit to restrain instantaneous line surge, designed for unstable grid industrial sites. It performs three-phase AC to adjustable DC phase-controlled rectification with integrated dynamic brake circuit for heavy-duty DC motor speed control and regenerative energy dissipation during deceleration.
2. Model Definition
86466: General base part number of FlexPak3000 series armature SCR rectifier stack;47: Current specification code for rated continuous 180ADC armature DC output;S: Surge suppression customized variant, interchangeable with standard, high-temperature and revised editions for field emergency replacement.
3. Technical Specifications
Three-phase AC input:208/230/460VAC,50/60Hz; nominal rated DC output voltage 230VDC, continuous rated armature DC output 180ADC, 60-second short-time overload rating 270ADC(150% overload). Equipped with double-sided thick aluminum fin large air-cooled heat sink; internal six high-power industrial SCR thyristors, full enhanced RC surge absorption components and integrated high-current dynamic brake power switch module, accessory code 0-51378-25 trigger PCB attached on side position. Operating ambient temperature range -12℃~+75℃, non-condensing humidity 5%~95%; overall dimension 310mm×195mm×132mm, net weight approx 1.82kg; isolation withstand voltage between high-voltage power terminals and low-voltage trigger control terminals ≥3000Vrms.
4. Interface and Communication Configuration
Thick copper bolt terminals for three-phase main AC input and armature DC positive/negative high-current power wiring; independent screw terminal block for trigger pulse input from main 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 from 846723T control board to complete three-phase full-wave SCR phase-controlled rectification, convert industrial three-phase AC into continuously adjustable DC voltage to realize closed-loop speed regulation of 75~100HP heavy-duty DC armature motor. Cooperate with 86007-A brake PCB: when DC bus voltage exceeds preset threshold under light-load/no-load condition, built-in brake switch turns on external braking resistor to consume regenerative energy generated in motor deceleration and stop stage. Upgraded full-range RC absorption network of S-type restrains abnormal grid surge overvoltage to prevent SCR breakdown; meanwhile collects overheat and overcurrent interlock signals and feeds back to master control board to trigger drive fault protection lockout.
6. Application Scenarios
Matching spare rectifier for FlexPak3000/MaxPak Plus 75~100HP medium-large specification DC drive cabinet; mainly used for metallurgical rolling auxiliary transmission, heavy-duty mine conveyor, large extruder, paper main drive DC system maintenance replacement, specially applicable for factory workshop with unstable power grid fluctuation relying on S-type surge protection design.
7. Operation and Maintenance Instructions
Cut off total three-phase cabinet AC power and wait over 60 minutes for full residual charge discharge of internal high-voltage bus capacitor before disassembly to avoid high-voltage electric shock. Semi-annual maintenance: remove heat sink fin dust with dry low-pressure compressed air, prohibit liquid cleaning solvent touching internal SCR and high-power resistance components. After field replacement installation, finish static trigger inspection and no-load DC voltage calibration prior to full-load motor trial run; spare rectifier stacks shall be sealed in anti-static bags and stored inside constant-temperature dry warehouse to prevent internal component insulation damp aging.
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