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Print current pageProduct Description
- brief introduction
- technical parameter
- Product size
Application
JD6—Ⅲ phase and amplitude discrimination residual current-operated protective device (hereinafter referred to as protective device) combines with the low voltage circuit breaker or AC contactor to form the residual current operated protective device, it is used to protect the circuit against the earthing fault, prevent the equipment accident or electric fire for the earthing fault current, provide the indirect contact protection against the human electric shock, suitable for the safe operation of power grid.
JD6—Ⅲ protective device is our newly developed product, designed with the SCM control technology. It has functions like inverse time lag and primary reclosing functions as well as ideal time-delay characteristics, providing two gears of breaking time: 0.5s and 0.3s for user's selection. It is suitable for complex rural power grid and changeable climatic environment, with high rate of putting into use, especially, it is used for the primary general protection or secondary general protection of multi-class protection of powe grid. The product has conformed to the requirements of breaking time class difference stipulated as DL/ T4992001 Rural low-voltage Electric Power Technical Code.
Function characteristic
ThebreakingtimeisclassifiedastypeS,hastwoadjustablegears:0.5sand0.3s.Inthebreakingtimeof2I△ and5I△n,itpresentstheinversetimelagcharacteristics. Manyconnectionclassmaybeset(seemode),mainswitchesof connected,andthetransformersaregenerallyaccepted
ExcepttheconnectionclassDoruser'sspecialrequirement,thetrialpowersupplyisperformedonceafte startuporshutdownheprotectiondeviceeclusesautomaticallyafteropening2030sandhenputsntouse;he protectivedevice ,itislockedbyitself
Thefixedgearofresidualcurrentoperationvalueisadjustable,usercanselecttheproperoperationvalueaccordin tothecircuitorweatherconditions.Thesurfacehasthendicationofotalesidualcurrentvectorvalueofcircuit
ThestandardtypeprotectivedevicecanmakeACcontactorworkwithoutnoiseandsavetheenergy,thecontacto coilsof220Vand380Varegenerallyaccepted,itisveryconvenienttoconnect, the service life of contactor coil maybe prolonged. Due to the energy-saving efficiency, the investments for electricity expense of 1-2 years may be recovered.
Main Technical data
Rated voltage 380VRated frequency 50HzRated main circuit current 63A~400ARated residual current operating value: 0.1A, 0.3A and0.5A adjustable Rated residual current non-operating value: 0.05A, 0.15A and 0.25A Rated breaking time: ＜0.3s(0.5s) adjustable Rated auxiliary voltage 220VCapacity of protection device output contact 220V 3ADelaying time of reclosing operation 20s～30sClassification of operation characteristics: Type AC Classification of breaking time: Type S Fuse capacity (depending on the size of main switch): 5A, 8A and 10A
