A CONTROL CUBICLE FOR AN ELECTROSTATIC PRECIPITATOR POWER SUPPLY. USED TO CONTROL THE VOLTAGE TO THE TRANSFORMER RECTIFIER UNIT, AND TO TALK TO THE PROGRAMMABLE LOGIC CONTROL (PLC) SYSTEM AND TO OTHER PARTS OF THE PLANT. TECHNICAL SPECIFICATION: STEEL FABRICATED AND PAINTED CUBICLE WITH CUT OUTS FOR SWITCHGEAR AND INSTRUMENTATION; MOULDED CASE CIRCUIT BREAKER (ELECTRICAL SWITCHGEAR) MAIN SWITCH; CONTACTOR; MINIATURE CIRCUIT BREAKERS; MCSII (A BESPOKE THYRISTOR CONTROLLER WHICH ALSO CONTAINS SUBSTANTIAL SOFTWARE TO COMMUNICATE WITH THE PLC AND THE ELECTRO STATIC PRECIPITATOR) AND INPUT/OUTPUT SECONDARY INDICATION; PLC MODULES WHERE REQUIRED; THYRISTOR ASSEMBLY FOR CONTROL; AND CONNECTIONS FOR CONTROLLED AREA NETWORKS. TECHNICAL SPECIFICATIONS: PRIMARY VOLTAGE - 220 TO 700 VOLTS; PRIMARY CURRENT - 5 TO 600 AMPS.

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6. NOTE 5 TO CH. 84 ALSO APPLIES. CN 8537 10 10: NUMERICAL CONTROL APPARATUS, OTHER THAN SWITCHING APPARATUS OF HEADING 8517; FOR A VOLTAGE NOT EXCEEDING 1000 V; NUMERICAL CONTROL PANELS WITH BUILT-IN AUTOMATIC DATA-PROCESSING MACHINE