L2234
Emax
151/158
Doc. No.
Model
1SDH000460R0002
Apparatus
Scale
Page No.
L2778
F) The auxiliary voltage Vaux allows actuation of all operations of the PR121/P, PR122/P and PR123/P releases.
Having requested a Vaux insulated from earth, one must use “galvanically separated converters” in compliance with IEC 60950 (UL 1950) or
equivalent standards that ensure a common mode current or leakage current (see IEC 478/1, CEI 22/3) not greater than 3.5 mA, IEC 60364-
41 and CEI 64-8.
G) Earth fault protection is available with the PR122/P and PR123/P releases by means of a current sensor located on the conductor connecting
to earth the star center of the MV/LV transformer.
The connections between terminals 1 and 2 (or 3) of current transformer UI/O and poles T7 and T8 of the X (or XV) connector must be made
with a two-pole shielded and stranded cable (type BELDEN 3105A/3105B) no more than 15m long. The shield must be earthed on the circuit-
breaker side and current sensor side.
N) With releases PR122/P and PR123/P, the connections to the zone selectivity inputs and outputs must be made with a two-pole shielded and
stranded cable (type BELDEN 3105A/3105B), no more than 300m long. The shield must be earthed on the selectivity input side.
O) Systems with a rated voltage greater than 690V require the use of an insulation voltage transformer to connect to the busbars (connect according
to the diagrams on the sheet provided with the kit 1SDH000460R0508).
P) With releases PR122/P and PR123/P with communication module PR120/D-M, the coils YO and YC are controlled directly from contacts K51/
YO and K51/YC with maximum voltages of 110-120 VDC and 240-250 VAC.
Q) The second shunt opening release may be installed as an alternative to the undervoltage release.
R) The SACE SOR TEST UNIT + opening release (YO) is guaranteed to operate starting at 75% of the Vaux of the opening release itself.
While the YO power supply contact is closing (short-circuit on terminals 4 and 5), the SACE SOR TEST UNIT is unable to detect the opening
coil status.
Consequently:
- For continuously powered opening coil, the TEST FAILED and ALARM signals will be activated
- If the coil opening command is of the pulsing type, the TEST FAILED signal may appear at the same time. In this case, the TEST FAILED signal
is actually an alarm signal only if it remains lit for more than 20s.
S) Also available in the version with normally-closed contact
U) The measuring module PR120/V is always supplied with relay PR123/P.
V) If fig. 22 is present (second set of auxiliary contacts) simultaneously as relay PR122/P (or PR123/P), the contacts for the zone selectivity in fig.
42 (K51/Zin, K51/Zout, K51/Gzin and K51/Gzout) are not wired. In addition, the indicator module PR120/K in figures 46 and 47 cannot be
supplied.
W) For the connections between TO toroidal transformer and poles of CB X (or XV) connector, use a shielded 4-pole cable with paired braided wires
(BELDEN 9696 paired type), length not exceeding 10m. The shielding will be grounded on CB side.
X) T3 and T4 poles of X (or XV) connector are used to measure voltage when U>690V. In this case, they must be connected to the secondary winding
of the TU voltage transformer (see fig. 44). Ask ABB SACE for applications of the residual current protection with voltages higher than 690V.
Y) The shielding of the connection cable will be grounded on CB side only. The connection must be made with a two-pole shielded and stranded
cable (type BELDEN 3105A) no more than 15m long.
