RELIANCE 86466-26R
86466-26R is three-phase fully-controlled SCR thyristor rectifier stack belonging to Reliance FlexPak3000/MaxPak Plus DC drive power assembly 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 form complete armature power unit. Original OEM manufacturing is permanently discontinued; available supply includes surplus original new spare parts and full-load bench tested refurbished modules, interchangeable alternative part codes:86466-26,86466-26S,86466-26V. It performs three-phase AC to adjustable DC phase-shift rectification and integrates built-in dynamic brake switching circuit for high-current DC motor closed-loop speed regulation and regenerative braking power dissipation during deceleration. R suffix denotes factory revised standard edition with optimized internal wiring layout and upgraded overvoltage absorption circuit.
Description
1. Product Brief Introduction
86466-26R is three-phase fully-controlled SCR thyristor rectifier stack belonging to Reliance FlexPak3000/MaxPak Plus DC drive power assembly 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 form complete armature power unit. Original OEM manufacturing is permanently discontinued; available supply includes surplus original new spare parts and full-load bench tested refurbished modules, interchangeable alternative part codes:86466-26,86466-26S,86466-26V. It performs three-phase AC to adjustable DC phase-shift rectification and integrates built-in dynamic brake switching circuit for high-current DC motor closed-loop speed regulation and regenerative braking power dissipation during deceleration. R suffix denotes factory revised standard edition with optimized internal wiring layout and upgraded overvoltage absorption circuit.
2. Model Definition
86466: Universal base part number of FlexPak3000 series armature SCR rectifier power stack;26: Current grade code corresponding to rated continuous 90ADC armature DC output;R: Factory revised standard revised version, compatible cross replacement with S enhanced surge type and V high-temperature reinforced version in field maintenance.
3. Technical Specifications
Three-phase AC input:208/230/460VAC,50/60Hz; nominal rated DC output voltage 230VDC, continuous rated armature DC output 90ADC, 60-second short-term overload capacity 135ADC(150% overload rating). Equipped with double-sided thickened aluminum fin large-size air-cooled heat sink, internally configured six high-power industrial SCR thyristors, complete RC surge absorption components and integrated dynamic brake power switch module. Operating ambient temperature range -12℃~+72℃, non-condensing relative humidity 5%~95%; overall dimension 252mm×162mm×102mm, net weight approx 1.72kg; isolation withstand voltage between high-voltage AC terminals and low-voltage trigger control terminals ≥3000Vrms.
4. Interface and Communication Configuration
Oversized thick copper bolt terminals for three-phase main AC input and DC armature positive/negative high-current power wiring; multi-point screw terminal block 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 pulse signals transmitted from 846723T main control board to realize three-phase full-wave SCR phase-controlled rectification, convert industrial three-phase alternating current into continuously adjustable DC voltage to accomplish closed-loop speed control of high-current DC armature motor. Cooperate with 86007-A brake control PCB: when DC bus voltage exceeds preset threshold under light/no-load working condition, built-in brake switch turns on to access external braking resistor and consume regenerative energy in motor deceleration and stop process. Internal full-range RC absorption network suppress instantaneous surge overvoltage to avoid SCR chip breakdown; meanwhile collect overheat and overcurrent interlock signals and feed back to main control board to activate drive fault protection lockout.
6. Application Scenarios
Standard matching rectifier spare part for FlexPak3000/MaxPak Plus 40~60HP heavy-duty DC drive cabinets; widely used for fault replacement maintenance of heavy extruder, large wire drawing machine, papermaking main transmission and heavy-load industrial conveying DC drive system overhaul.
7. Operation and Maintenance Instructions
Cut off cabinet total three-phase AC power and wait more than 60 minutes for complete residual electricity discharge of internal high-voltage bus capacitor before disassembly operation to prevent high-voltage electric shock hazard. Semi-annual routine maintenance: blow off 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, finish static trigger signal inspection and no-load DC output 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 device insulation deterioration caused by dampness.
Get a Quote