ABB PFVL141V Horizontal measuring sensor

The capacity of the regenerative resistor integrated within the digital torque amplifier is designed for short-term operation only, such as the deceleration to stop period. Operation is not possible with an overhauling load. Install an external regen resistor if the regen power exceeds the processing capability of the digital torque amplifier. The specifications of regen resistors integrated in digital torque amplifiers and the regen power they can process (average) are shown below.The regen capacity (average) which can be processed is a 20% rating of the regenerative resistor capacity integrated within the digital torque amplifier.

When installing an external regen resistor

make the resistance the same as that of the resistor integrated within the digital torque amplifier. When using several resistors with small resistance combined in a group to increase the capacity (W) of the regen resistor, select resistors so that the value including the resistance error is equal to or greater than the “minimum allowable resistance” in the above table

External Regen Resistors(1) If the power resistor is used at the rated load rate, resistor temperatures will reach 200°C~300°C. Be sure to derate before using. Check with the manufacturer for the load characteristics of the resistor. Use at a load rating of 20% or less when using natural cooling (natural convection cooling), and at 50% or less when forced air cooling is used. (2) For safety reasons, we recommend the use of resistors with thermostatic switches.

SGDG-01GT

 The SGDG-01GT does not have the regen transistor built-in even though there are terminals for connecting an external regen resistor. Therefore, for external regen requirement, the JUSP-RG08D external regen unit must be used. This unit connects directly across the DC bus. It is a self-contained unit consisting of bus sensing circuitry, switching IGBT, 50 ohm power resistor, and alarm relay contacts. The regen capacity of this unit is 60W before derating. The convection cool capacity is 12W. Capacity increases to 30W with forced-air cooling. When this external regen unit is used, #5 of SW1 in the SGDG-01GT should be turned OFF to avoid erroneous alarms.

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