ABB SPAU 331 C Manual do utilizador e descrição técnica - Página 11

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Power supply

module

The power supply module is located behind the

system front panel of the relay together with

the output relay module. The supply module is

a separate relay module and can be withdrawn

after removal of the system front panel. The

power supply module produces the voltages re-

quired by the relay modules from the auxiliary

supply voltage.

There are two types of power supply modules,

differing only in input voltage:

SPGU 240 A1:

Nominal voltage U

= 110/120/230/240 V ac

= 110/125/220 V dc

Operative range U = 80...265 V ac/dc

SPGU 48 B2:

Nominal voltage U

= 24/48/60 V dc

Operative range U = 18...80 V dc

The power supply type is marked on the system

front panel.

The power supply module is a transformer con-

nected, i.e. galvanically separated primary and

secondary circuits, flyback type rectifier. The

primary circuit is protected by a fuse F1, 1A

(slow) in SPGU 240 A1 and 4A (fast) in SPGU

48 B2, which are located on the printed circuit

board of the module.

When the power supply is on, a green LED in-

dicator U

is lit on the system panel. The su-

aux

pervision of the supply voltages for the electron-

ics is located on the regulating modules. The

self-supervision alarm is given if any of the sec-

ondary voltages differ more than 25% from the

nominal value. Also, if the power supply mod-

ule is missing, or if there is no auxiliary supply

to the voltage regulator at all, an alarm is given.