L6555
Emax
65/74
Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
Fig. 47
= Circuits of the indicator module PR120/K of the PR122/P and PR123/P releases - connection 2 (optional)
(see note V).
Fig. 48
= Circuits of the measuring module PR120/V of the PR122/P and PR123/P releases connected inside the three-pole
circuit-breaker with outside neutral conductor (optional for the release PR122/P)(see note U).
Fig. 61
= SACE SOR TEST UNIT Test/monitoring Unit (see note R)
Fig. 62
= Circuits of the signalling unit PR021/K (outside the circuit-breaker).
Incompatibilities
The circuits indicated in the following fi gures cannot be supplied simultaneously on the same circuit-breaker:
6 - 7 - 8
13 - 14
22 - 46 - 47
43 - 44 - 48
Notes
A) The circuit-breaker is only fi tted with the accessories specifi ed in the ABB SACE order acknowledgement. Consult this ca-
talogue for information on how to make out an order.
B) The undervoltage release is supplied for operation using a power supply branched on the supply side of the circuit-breaker
or from an independent source. The circuit-breaker can only close when the release is energized (there is a mechanical lock
on closing).
If the same power supply is used for the closing and undervoltage releases and the circuit-breaker is required to close au-
tomatically when the auxiliary power supply comes back on, a 30 ms delay must be introduced between the undervoltage
release accept signal and the energizing of the closing release. This may be achieved using an external circuit comprising a
permanent make contact, the contact shown in fi g. 12 and a time-delay relay.
E) For connecting the EIA RS485 serial line, see “Technical Application Book – volume 9” communication via BUS with the ABB
switches.
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 con-
ductor 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 fi g. 22 is present (second set of auxiliary contacts) simultaneously as relay PR122/P (or PR123/P), the contacts for the zone
selectivity in fi g. 42 (K51/SZin, K51/SZout, K51/GZin and K51/GZout) are not wired. In addition, the indicator module PR120/K
in fi gures 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 fi g. 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 shiel-
ded and stranded cable (type BELDEN 3105A) no more than 15m long.
Z) Short-circuit T5 and T6 if the external neutral current sensor (UI/N)is not connected.
