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6.12. Opening mechanism: STRIKER
Polarized
: The trip is associated to a striker. The type of trip is a polarized trip, this is, the trip is
associated to a striker. There are a lot of models of strikers in the market, with different trip
energies, being for example 50 mJ (0.05W·s) and operation voltage of 6V, or 135 mJ (0,1W·s) and
operation voltage of 24V.
The opening mechanism is activated by means of a striker. The activation of the trip generates a
pulse train.
The
Trip Voltage Level
setting allows adjusting the trip voltage level required by the selected
striker. The default value is 17 Vdc, although there are several options:
•
12 Vdc
•
17 Vdc
•
22 Vdc
•
24 Vdc
The equipment will allow the trip when it gets the selected trip voltage, so if a lower level that the
required by the striker is adjusted, it may result on tripping without enough energy and not
activating the striker.
On the other hand, if a higher level that the required by the striker is selected, the activation of the
striker is guaranteed, however, the fault trip time during start-up may be increased. Fanox
encourages selecting the correct value of this critical setting and offers its expertise at any doubt.
Striker activation
The activation of the SIA-B trip output means that a capacitor has discharged on the output
terminals. This discharge of energy is sufficient to activate a striker that mechanically acts on a
mechanism to open the current circuit. The striker is connected directly to the SIA-B output, which
supplies sufficient power to activate it (24 Vdc
– 135mJ).
The striker is a bistable device with a simple action. The striker shaft is moved by a spring. The
striker is activated by a polarized low-power electrical signal, supplied by the relay if a fault occurs.
Resetting the shaft to its position is done manually. Resetting the striker has to be done in such a
way as to guarantee that the opening mechanism is closed. This is normally done manually.
Summary of Contents for SIA-B
Page 9: ...www fanox com Rev 32 9 114 The dimensions are in mm Cut out pattern ...
Page 11: ...www fanox com Rev 32 11 114 Cut out pattern 2 3 Striker dimensions 2 3 1 PRT 15 ...
Page 12: ...www fanox com Rev 32 12 114 2 3 2 PRT A 44 5 B 49 5 C 56 5 D 64 5 E 42 5 ...
Page 19: ...www fanox com Rev 32 19 114 3 3 Functional Diagram ...
Page 24: ...www fanox com Rev 32 24 114 Dimensions ...
Page 27: ...www fanox com Rev 32 27 114 Dimensions Model CT16 5 Model CT08 5 ...
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Page 101: ...www fanox com Rev 32 101 114 Trip Voltage Level 17 Vdc C Nominal current 8 C CT type CT008 ...
Page 113: ...www fanox com Rev 32 113 114 NOTES ...
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