DC Current Supply Unit GG 8
field coil supply for dc motors
current controlled with current monitoring
field coil currents up to 20A
The dc current supply unit GG8 has been developed to supply field coils in separately excited dc motors.
The unit has an internal current regulator to ensure constant excitation with cold as well as warm generators. An external series speed regulator allows its use as a single-quadrant thyristor unit.
Essentially, the GG8 consists of a partially controlled al-ternating-current bridge with freewheeling properties, a current regulator, and a limit value switch to monitor the direct current. The response threshold is 10% of the ad-justed current. Reaching the threshold is indicated by an LED. One potential free relay contact is at disposal for control purposes.