Page 159 - Sace Emax 2 Manual for design engineers

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7. Check that the circuit-breaker is open (open / closed indicator "O - OPEN"), and check that the springs
are discharged (spring signalling device "white - DISCHARGED SPRING") as indicated in Figure 79.

Figure 79

Mechanical status indicators The following are the possible states in which you can find the circuit-breaker:
1. Circuit-breaker open with springs discharged (see Figure 80).
2. Circuit-breaker open with springs charged (see Figure 81).
3. Circuit-breaker closed with springs discharged (see Figure 82).
4. Circuit-breaker closed with springs charged and not ready to close (see Figure 83). This state occurs
when after closing (see step 4 - Manual operations for opening and closing the circuit-breaker) the
springs are recharged manually or automatically by the gearmotor (if provided).
5. Circuit-breaker open with springs charged and not ready to close (see Figure 84). This state occurs
in the following cases:
• The circuit-breaker is open due to tripping of protection trip units and the Reset signal has not been
reset. To close the circuit-breaker press the TU Reset pushbutton on the front of the circuit-breaker.
• The key lock or padlock is active in the open position.
• The undervoltage coil is de-energized
• The opening coil is permanently energized.
• The closing coil is permanently energized.
• The pushbutton for enabling the insertion/extraction crank of a withdrawable circuit-breaker is pres-
sed.

Figure 80 Figure 81 Figure 82

Figure 83 Figure 84

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