L3447
Emax DC
102/108
Doc. No.
Model
1SDH000635R0002
Apparatus
Scale
Page No.
L3728
YO1
= Overcurrent shunt opening release (trip coil)
YO2
= Second shunt opening release (see note Q)
YR
= Coil to electrically reset the circuit-breaker
YU
= Undervoltage release (see notes B and Q)
Description of figures
Fig. 1
= Motor circuit to load the closing springs.
Fig. 2
= Circuit of shunt closing release.
Fig. 4
= Shunt opening release.
Fig. 6
= Instantaneous undervoltage release (see notes B and Q).
Fig. 7
= Undervoltage release with electronic time-delay device, outside the circuit-breaker (see notes B and Q)
Fig. 8
= Second shunt opening release (see note Q).
Fig. 11
= Contact for electrical signalling of springs loaded.
Fig. 12
= Contact for electrical signalling of undervoltage release energized (see notes B and S).
Fig. 13
= Contact for electrical signalling of circuit-breaker open due to tripping of the overcurrent release. The circuit-breaker may be closed
only after pressing the reset pushbutton.
Fig. 14
= Contact for electrical signalling of circuit-breaker open due to tripping of the overcurrent release and electrical reset coil. The circuit-
breaker may be closed only after pressing the reset pushbutton or energizing the coil.
Fig. 21
= First set of circuit-breaker auxiliary contacts.
Fig. 22
= Second set of circuit-breaker auxiliary contacts (see note V)
Fig. 23
= Third set of supplementary auxiliary contacts outside the circuit-breaker.
Fig. 31
= First set of contacts for electrical signalling of circuit-breaker in connected, test isolated, disconnected position.
Fig. 32
= Second set of contacts for electrical signalling of circuit-breaker in connected, test isolated, disconnected position.
Fig. 42
= Auxiliary circuits of PR122/DC and PR123/DC releases (see notes F, M and V).
Fig. 45
= Circuits of the communication module PR120/D-M of the PR122/DC and PR123/DC releases (optional) (see note E).
Fig. 46
= Circuits of the indicator module PR120/K of the PR122/DC and PR123/DC releases - connection 1 (optional) (see note V).
Fig. 47
= Circuits of the indicator module PR120/K of the PR122/DC and PR123/DC releases - connection 2 (optional) (see note V).
Fig. 62
= Circuits of the signalling unit PR021/K (outside the circuit-breaker).
Incompatibilities
The circuits indicated in the following figures cannot be supplied simultaneously on the same circuit-breaker:
6 - 7 - 8
13 - 14
22 - 46 - 47
Notes
A) The circuit-breaker is only fitted with the accessories specified in the ABB SACE order acknowledgement. Consult this catalogue 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 automatically 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 fig. 12 and a time-delay relay.
E) For the EIA RS485 serial interface connection see document RH0298 regarding MODBUS communication.
F) The auxiliary voltage Vaux allows actuation of all operations of the PR122/DC and PR123/DC 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.
N) With releases PR122/DC and PR123/DC, 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.
P) With releases PR122/DC and PR123/DC 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.
S) Also available in the version with normally-closed contact
U) The measuring module PR120/V is always supplied with relay PR123/DC.
V) If fig. 22 is present (second set of auxiliary contacts) simultaneously as relay PR122/DC (or PR123/DC), 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.
