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Installing the VW3-A45201 D90 option board
Installation and connections

TM-5-3895-374-24-1 Paving Machine Bituminous Material: Crawler Mounted Diesel Engine Driven Manual
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TM 5-3895-374-24-1 Options ALTIVAR 0,75 to 30 kW Special case braking resistance thermal protection The standard resistance does not have thermal protection The elements making it up can, without damage, reach temperatures higher than the steady state temperature of 300°C noted on page 66 The ALTIVAR ATV-452, however, fitted with a braking option, enables the resistance to be protected against overheating, by using a normally closed thermocontact or overload relay This protection can be necessary in the following cases - utilization of resistances of a kind whose insulation risks being damaged or destroyed if heating is abnormally high, - applications in which higher or more frequent braking than planned, can prove dangerous for the installation or the driven machine Choice of thermocontact - minimum DC electrical characteristics on resistive load 10V - 5mA, - tripping temperature to be determined according to the resistance used and the selected location EXAMPLE: standardized resistance Choose a 2600 C thermocontact and, attach it to the upper metal band joining the two elements on the right Choice of thermal overload relay Calculate the thermal overload relay rating using the formula I =    P  , in which R - P = rated power of the resistance, - R = ohmic value of the resisitance Connect the thermal overload relay's N/C contact to terminals PY-PZ Initial setting up The initial setting up of the braking option needs no adjusting After checking the connections and perhaps adjusting the speed controller settings (see p 38 onwards), the ALTIVAR can be switched on Should there be any doubt as to the braking power, proceed in the following manner - preset a deceleration ramp longer then the required braking time, - start up the machine and carry out successive braking operations, gradually reducing the ramp time until the final adjustment is reached, making sure that the braking cycles are identical to those for real use Maintenance In the event of overbraking, the speed controller may display the following codes   0br  Deceleration ramp not followed Increase the   0bF  Capacitor overvoltage owing to excessive deceleration time braking or a driving load (page 3-222) }







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