RELIANCE 0-52850 IRFA Ring Counter & Firing Circuit Board

Technical Specifications

Model:0-52850

Brand:RELIANCE

Product type:IRFA Ring Counter & Firing Pulse PCB Board

Substrate:FR4 printed circuit board

Weight:0.32kg

Dimension:160mm110mm2.8mm

Operating temperature:0℃ ~ 60℃

Storage temperature:-40℃ ~ +85℃

Relative humidity:5%~85%,non-condensing

Certification:CE

System compatibility

0-52850 belongs to RELIANCE MaxPak series IRFA firing board.

Designed for Reliance legacy MaxPak DC drive rack.

Cooperate with ACCA control board 0-52837 and OLVC protection board 0-52808.

Used to generate thyristor firing pulse for MaxPak power converter unit.

Commonly used for old drive equipment maintenance and spare replacement.

Function

0-52850 IRFA is ring counter and firing trigger card for RELIANCE MaxPak DC drive.

Receive control command signal from ACCA analog control board.

Generate synchronized firing pulse sequence for thyristor bridge rectifier.

Front panel Test Pulse button for offline trigger pulse test.

Complete phase angle control according to speed loop output signal.

Synchronize firing timing with AC input mains voltage.

Block pulse output under drive fault interlock condition.

Installation

Power off the whole drive cabinet and cut main power supply.

Insert 0-52850 board into MaxPak designated slot.

Fasten front panel fixing screws.

Connect edge connector and pulse output wiring to thyristor gate terminal.

Check wiring insulation and phase sequence matching.

Power on system,run test pulse function and phase synchronization calibration.

Verify thyristor firing and motor running performance.

Interface

MaxPak edge connector,thyristor pulse output terminals,front panel test pulse push button,status LED indicators.

Feature

RELIANCE 0-52850,MaxPak IRFA ring counter firing PCB assembly.

Built-in mains voltage synchronization circuit for phase angle regulation.

Front panel Test Pulse button for convenient on-site maintenance inspection.

Stable pulse output to ensure balanced three-phase thyristor triggering.

Clear terminal marking for safe wiring and troubleshooting.

Discontinued obsolete board,supply only for old drive equipment spare replacement.

Suitable for metallurgy,paper-making heavy-duty MaxPak DC drive renovation.

Diagnostic

Motor no output torque:no firing pulse or phase synchronization failure;

Three-phase current unbalance:firing pulse drift or board component aging;

Test pulse no response:board auxiliary power supply failure;

Drive trip randomly:pulse interference or poor edge connector contact.

Product Brief

RELIANCE 0-52850 IRFA is MaxPak ring counter firing circuit board.

It generates synchronized thyristor firing pulses controlled by analog loop signal,widely used as spare part for heavy industry DC motor drive maintenance.

Disclaimer

All parameters are for reference only and not for quotation basis. Goods are scarce and will be powered on for inspection before shipment. Overseas delivery lead time 3-7 working days. This item is only used for equipment maintenance and retrofit.