DCREG2 15P0059B3
DCREG4 USER MANUAL
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3.26 LEGEND FOR POWER CONNECTIONS
A(B) AC/DC conversion bridge.
N.B.: for DCREG2, the polarities in brackets for bars A1 and A2 refer to the regenerative
operation.
CU Control unit for DCREG MODULAR.S.
FU1-2-3 Ultrafast fuses for DCREG Size 1... 2A.
Fast-acting fuses for DCREG MODULAR.S: in this case, fuses can be replaced by an
automatic circuit breaker.
FU4 Direct current side ultrafast fuse for AC/DC bridge protection.
N.B.: This is required for DCREG2 Size 1 ... 2A for regenerative operation only, and for
DCREG4 Size 1 ... 2A.
FU5-6 Ultrafast fuses protecting the field half-controlled rectifier bridge.
FU8-9 1A fast-acting fuses protecting the connection to terminals 53/54 to the power supply
mains.
FU10-11 2.5A fuses for DCREG Size 2A and DCREG MODULAR.S only, for air-cooling unit.
FU12 2.5A fast-acting fuses for internal switching.
FU13-14-15 1A delay fuses over transformer TS primary.
FU16-17-18 1A delay fuses over transformer TS secondary.
N.B.: they are required for DCREG Size 1 … 2A only and for a power supply exceeding
500 Vac.
KM AC/DC bridge power supply contactor.
In case of DCREG MODULAR.S, contactor can be replaced by an automatic circuit
breaker.
L Switching three-phase impedance.
L1-2-3 50/60 Hz three-phase mains.
M Direct current motor (armature circuit + field circuit).
PU DCREG MODULAR.S power unit.
TS Three-phase 50VA 700/500V transformer: phase shift 0°.
ELETTRONICA SANTERNO P/N: TR0108007.
N.B.: This is required for power supply values exceeding 500 Vac.
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