ACCESSOR I ES
6/7
Mechanical signalling of the tripping of protection trip unit - TU Reset (Fig. 04) The automatic circuit-breakers are always equipped with a mechanical device that signals the tripping status of the protection trip units. After the Ekip trip unit has tripped due to an electrical fault, the signalling device indicates the tripping status on the front of the circuit- breaker. The cir- cuit-breaker can be reset only after the signalling pushbutton has been restored to its normal operating position. The device conforms to the Ansi 86T standard. Emax 2 is fitted with the anti-pumping function. With the anti-pumping function the opening order always takes priority over a closing order. Moreover, when the Circuit Breaker is in open position due to a trip, the anti-pumping function allows the reclosing of the operating mechanism only after a reset of the trip, avoiding improper or accidental closing. Contact signalling tripping of protection trip unit Ekip – S51 (Fig. 05) The contact signals the opening of the circuit- breaker after the Ekip protection trip unit has tripped. The circuit-breaker can only be closed after the “TU Reset” tripped trip unit mechanical signalling pushbutton has been restored to its normal operating position. The switching contact, which is always supplied with the standard version of the automatic circuit-break- ers, is also available on request in a version for digital signals (for electrical characteristics, please refer to the RTC contact). It can also be associated with an optional accessory for resetting by remote control - YR. For electromechanical characteristics, please refer to the RTC contact. For E2.2, E4.2 and E6.2 it is possible to double the signal for the tripping of the Ekip Trip Unit specifying the dedicated code for the S51/2. The S51/2 is an alternative of the YR contact.
— Fig. 04
— Fig. 05
— Electrical diagram reference: figure 11
Contact signalling loaded springs – S33 M/2 This contact is always supplied with a geared motor; it remotely signals the spring status of the circuit- breaker operating mechanism. It is available in both standard version and version for digital signals.
Standard contact changeover contacts
Contact for digital signals
Type
changeover contacts
Minimum load
100mA @ 24V
1mA @ 5V
Breaking capacity DC
24V
-
0.1A
125V 250V 250V
0.3A @ 0ms 0.15A @ 0ms 5A @ cos ϕ 1 5A @ cos ϕ 0.7 5A @ cos ϕ 0.3 3A @ cos ϕ 1 2A @ cos ϕ 0.7 1A @ cos ϕ 0.3
- - - - - - - -
AC
400V
— Electrical diagram reference: figure 12
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