itsce-604050012 - SACESales.com

SACE Isomax S circuit-breakers for power
distribution
Electronic releases
The SACE Isomax S4, S5, S6, S7 and S8 circuit-breakers for protection in alternating
current can be fitted with SACE PR211/P or SACE PR212/P overcurrent releases,
constructed using electronic microprocessor-based technology. This allows protection
functions to be obtained which guarantee a high level of reliability and tripping
precision and which are unaffected by the external ambient. The power supply
needed for correct operation is supplied directly by the release current transformers,
in the presence of a phase current higher than or equal to 18% of their rated current,
even with a single phase supplied with voltage. There is only one adjustment for all
the phases and the neutral and the release is simultaneous for all the circuit-breaker
poles, with trip characteristics which are unaffected by the external ambient. The
functions and settings of the release protections can be verified by means of the
SACE TT1 and SACE PR010/T Test units.
GSIS9060
SACE PR211/P
SACE PR212/P
3
The SACE PR211/P release (available
from S4 to S7) provides protection functions
against overload L and instantaneous
short-circuit I, and is available in
the versions with functions I and LI.
The wide range of adjustments make this
release particularly suitable in all distribution
where tripping reliability and precision
is required and where magnetic
only protection is needed (from 1.5 to
12 x In), using the SACE PR211/P version
I release.
The SACE PR212/P release (available
from S4 to S8) provides protection functions
against overload L, delayed shortcircuit
S and instantaneous short-circuit
I, and against earth fault G. It is available
in the versions PR212/P with functions
LSI and LSIG; both allow use of the
PR010/K signalling unit, the PR212/D
dialogue unit and the PR212/T actuator
unit, which can be used either simultaneously
or individually, except for the
PR212/T actuator unit which is always
supplied when the dialogue unit is required.
It is particularly suitable in applications
with selective coordination requirements,
for earthing protection against the
risk of fire and evolutionary faults, and
for remote control and parametrisation,
network supervision and centralised
load management.
In 100 A 160 A 250 A 320 A
S4 160
S4 250
S5 400
S5 630
S6 630
S6 800
S7 1250
S7 1600
S8 2000
S8 2500
S8 3200
L 40÷100 64÷160 100÷250 128÷320
S 100÷1000 160÷1600 250÷2500 320÷3200
I 150÷1200 240÷1920 375÷3000 480÷3840
G 20÷100 32÷160 50÷250 64÷320
neutral (50%)
neutral (100%)
20÷50 32÷80 50÷125 64÷160
40÷100 64÷160 100÷250 128÷320
3/10 ABB SACE