Kemppi Master S 400 Service Manual

Also see for Master S 400: Operating instructions Quick guide

Kemppi Master S 400 Service Manual Manual pdf 11 page image

Service manual Master S 400 and 500 Version 1.1 5.9.20149Kemppi Oy3.5. Description of operationMaster S is divided in to six functional partsZ001 main circuit card with control circuitry Over voltage protection IGBT based power section with full bridge architecture. Switching frequency is dual mode: 50kHzin low and 20kHz in higher output power. Module has NTC resistor for overheat protection. Itlimits the primary heat sink temperature up to 90 degrees of Celsius. IGBT driver circuit Input rectifier Auxiliary power supply (switching mode) PSU for secondary power (Remote controller) DC-link capacitors (2x60μF film capacitors) Control card functions OCV (open circuit voltage) adjustment circuit keeps the voltage stable and at a safe level. Microcontroller (note that it cannot be updated in the field. Connector is in the primary side)Z002 secondary rectifier card Secondary voltage rectificationP001 Panel card 7-segent displays Display selection button for voltage/current Setup functions Potentiometer for current set value adjustmentT001 Main transformer Lowers the voltage to lower level Isolates primary and secondaryT002 Auxiliary transformer needed for antifreeze and TIG functionsCellu coil (optional) Increasing voltage for cellulosic electrodes