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ABB SACE 35
. The coils can controlled directly from contacts K51/YO
and K51/ with maximum voltages 110-120 and 240-250 AC.
B) The undervoltage release supplied for operation using power supply branched the supply side the circuit-
breaker from independent source. The circuit-breaker can only close when the release energized (there is
a mechanical lock closing).Having
requested Uaux insulated from earth, one must use “galvanically separated converters” compliance with IEC
60950 (UL 1950) equivalent standards that ensure common mode current leakage current (see IEC 478/1,
CEI 22/3) not greater than 3.
S) Also available the version with normally-closed contact
V) fig.
N) With PR122/DC and PR123/DC releases, the connections the zone selectivity inputs and outputs must made
with two-pole shielded and stranded cable (see user manual), more than 300 long. (K51/Zin, K51/Zout, K51/Gzin and K51/Gzout) are not wired.
Q) The second opening release may installed alternative the undervoltage release. Consult
this catalogue for information how make out order. present (second set auxiliary contacts) simultaneously PR122/DC PR123/DC release, the con
tacts for the zone selectivity fig.5 mA, IEC 60364-41 and CEI 64-8.
P) With PR122/DC and PR123/DC releases with communication module PR120/D-M, the power supply for coils YO
and must not taken from the main power supply.Notes
A) The circuit-breaker only fitted with the accessories specified the ABB SACE order acknowledgement. addition, the
indicator module PR120/K figures and cannot supplied.
E) MODBUS map available the RE1134001 document
F) The auxiliary voltage Uaux allows actuation all operations the PR122/DC and PR123/DC releases. This may achieved using an
external circuit comprising permanent make contact, the contact shown fig. and time-delay relay. The shield must be
earthed the selectivity input side.
If the same power supply used for the closing and undervoltage releases and the circuit-breaker required to
close automatically when the auxiliary power supply comes back on, delay must introduced between
the undervoltage release accept signal and the energizing the closing release
