Because of Diode Bridge rectifier and inductive filter
present in the output circuit.
An inductive filter
is designed to prevent damage to any three-phase electronic system plagued by capacitor or large load switching.
The inductive filter
prevents damage to any three-phase electronic system plagued by capacitor or large load switching.
Unfortunately, there is no inductive filter
on the secondary side of the transformers, which could, in turn, produce voltages greater than 150 V across the two diodes D1 and D2, ultimately making the double dual-flyback topology unacceptable.
Signal's CH and CL chokes are designed to complement the rectifier power transformers so that a set may be specified for DC power supplies using inductive filters