Page 110 - Sace Emax 2 Catalogue

6/8 SACE EMAX 2 LOW VOLTAGE AIR CIRCUIT-BREAKERS

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Accessories for circuit-breakers

Control
Opening and closing release- YO/YC (Fig. 06)
The opening and closing releases enable the circuit-breaker to be controlled remotely. Opening
is always possible, while closing is available only when the closing springs of the operating mechanism
are loaded and the circuit-breakers is ready to close. The releases operate by means of minimum im-
pulse current duration time of 100 ms.
Furthermore, they can operate in permanent service. In this case, if opening command is given by
means of the opening release, the circuit-breaker can be closed by de-energizing the opening release
and, after a time of at least 30 ms, by controlling the closing.
The circuit breaker operating mechanism has an anti-pumping function that ensures safety and reli-
ability.

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Electrical diagram reference: figures 75, 77

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Fig. 06

Second opening and closing release - YO2/YC2
For certain installations the redundancy of mechanisms and circuit-breaker operating circuits is
often requested. To answer these needs, the SACE Emax 2 circuit-breakers can be equipped
with double opening release and double closing release. The technical characteristics of the second
opening release remain the same as those of the first opening and closing release. A double closing re-
lease can be used for E2.2, E4.2 and E6.2 circuit-breakers; a second open release in an alternative to un-
dervoltage release.

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Electrical diagram reference: figures 72, 79
General characteristics
Power supply (Un) AC DC
24V
30V
48V
60V
110V…120V
120V…127V
220V…240V
240V…250V
380V…400V -
415V…440V -
480V…500V -
YO/YO2: 70%...110% Un
Operating limits (IEC60947-2 standards)
YC/YC2: 85%...110% Un
Inrush power (Ps) 300VA 300W
Continuous power (Pc) 3.5VA 3.5W
Opening time (YO/YO2)
E1.2 35 ms
E2.2 … E6.2 35 ms
Closing time (YC/YC2)
E1.2 50 ms
E2.2 … E6.2 70 ms