FANOX SIA-B Series User Manual

Contents

FANOX SIA-B Series User Manual Manual pdf 69 page image

www.fanox.com Rev. 07 69/1385.15. Opening mechanism: STRIKERPolarized: The trip is associated to a striker. The type of trip is a polarized trip, this is, the trip isassociated 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 operationvoltage of 24V.The opening mechanism is activated by means of a striker. The activation of the trip generates apulse 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 VdcThe relay will allow the trip when it gets the selected trip voltage, so if a lower level that the requiredby the striker is adjusted, it may result on tripping without enough energy and not activating thestriker.On the other hand, if a higher level that the required by the striker is selected, the activation of thestriker is guaranteed, however, the fault trip time during start-up may be increased. Fanoxencourages selecting the correct value of this critical setting and offers its expertise at any doubt.The activation of the SIA-B trip output means that a capacitor has discharged on the output terminals.This discharge of energy is enough to activate a striker that mechanically acts on a mechanism toopen the current circuit. The striker is connected directly to the SIA-B output, which supplies enoughpower to activate it (24 Vdc – 135mJ).The striker is a bisSetting group 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 faultoccurs. Resetting the shaft to its position is done manually. Resetting the striker has to be done insuch a way as to guarantee that the opening mechanism is closed. This is normally done manually.As an example, the characteristics of the striker on the above image are next:• Travel:...........................................8m• Strength of the spring:• Start of travel: ...........................37 N• End of travel..............................18 N• Response time:..............................4 ms• Level of protection:.......................IP-40