L3692
Tmax T8
32/39
Doc N°
Mod.
1SDH000682R0002
Apparatus
Scale
Page N°
L3885
L5757
X1...X7
= Connectors for the circuit-breaker appications
XK1
= Connector for the power circuits of releases PR232/P-T8, PR331/P, PR332/P.
XO
= Connector for YO1 release
XR3…XR13
= Connectors for the auxiliary circuits of releases PR232/P-T8, PR331/P, PR332/P.
XV
= Delivery terminal box for the auxiliary circuits of the circuit-breaker
YC
= Shunt closing release
YO
= Shunt opening release
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
= Circuit of the motor for loading 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.12A
= Contact for electrical signalling of circuit-breaker open, with springs loaded and ready to close.
Fig.13
= Contact for electrical signalling of circuit-breaker open due to tripping of the overcurrent release.
The circuit-breaker can only be closed after the reset pushbutton has been pressed, or after the coil has
been energized for electrical reset (if available)
Fig.14
= Contact for electrical signalling of circuit-breaker open due to tripping of the overcurrent release
and coil for electrical reset. The circuit-breaker can only be closed after the reset pushbutton has been pressed
or after the coil has been energized.
Fig.22
= Auxiliary contacts of the circuit-breaker
Fig.41
= Auxiliary circuits of the PR331/P release (see note F).
Fig.42
= Auxiliary circuits of the PR332/P release (see notes F and N).
Fig.43
= Circuits of the PR330/V-T8 measuring module of the PR332/P release connected inside the three-pole or
or four-pole circuit-breaker (optional).
Fig.44
= Circuits of the PR330/V-T8 measuring module of the PR332/P release connected outside the circuit-breaker
(optional) (see note O).
Fig.45
= Auxiliary circuits of the PR332/P release with communication module PR330/D-M connected to actuator unit PR330/R
(see notes E, F, N and P).
Fig.46
= Circuits of the PR330/V-T8 measuring module of the PR332/P release connected inside the three-pole circuit-breaker with
outside neutral conductor (optional).
Fig.61
= SACE SOR TEST UNIT test/monitoring unit (see note R).
Fig.62
= Circuits of signalling unit PR021/K (outside the circuit-breaker)
INCOMPATIBILITY
The circuits indicated in the following fi gures cannot be supplied at the same time in the same circuit-breaker:
6 - 7 – 8
13 - 14
41 - 42 – 45
43 - 44 - 46
NOTES
A) The circuit-breaker is only fi tted with the accessories specifi ed in the ABB SACE order acknowledgement. Consult this catalogue for
instructions about how to make the 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 there is the same power supply for the closing and undervoltage releases and the circuit-breaker must close automatically when the
auxiliary voltage returns, a 30 ms delay must be introduced between the accept instant of the undervoltage release and energizing of
the closing release. This can be achieved by means of a circuit outside the circuit-breaker comprising a permanent closing contact, the
contact indicated in fi g. 12 and a time-delay relay.
E) Consult “Technical Application Handbook - vol. 9” communication via BUS with ABB circuit-breakers for connection of the EIA RS485
serial link.
F) The auxiliary voltage Vaux allows all the functions of PR331/P and PR332/P releases to be activated.
Since a Vaux isolated from earth is required, it is necessary to use “galvanically separated converters” conforming to standards
IEC 60950 (UL 1950) or equivalent, able to guarantee a common mode current or leakage current (see IEC 478/1, CEI 22/3) of no more
than 3.5mA, IEC 60364-41 and CEI 64-8.
G) Earth fault protection is available with the PR332/P release by means of a current sensor on the conductor that earths the neutral point of
the MV/LV transformer.
The connection between terminals 1 and 2 (or 3) of current transformer UI/O and terminals T7 and T8 of terminal box XV must be made
with two-pole shielded stranded cable (the BELDEN 8762/8772 type) no more than 15 m in length. The shield must be earthed on the
circuit-breaker side and on the current sensor side.
N) With release PR332/P release, the connections to the zone selectivity inputs and outputs must be made with two-pole shielded and
stranded cable (the BELDEN 8762/8772 type) no more than 300m in length. The shield must be earthed on the selectivity input side.
O) It is obligatory to use an insulation voltage transformer for connection to the busbars in systems with over 690V rated voltage or with a
PR330/V module connected by external sockets.
P) With the PR332/P release with communication module PR330/D-M, coils YO and YC are controlled directly from contacts K51/YO and
K51/YC with 110-120Vdc and 240-250Vac maximum voltage values.
Q) The second shunt opening release may be installed as an alternative to the undervoltage release.
