Izixhobo zokukhusela (I-SPD) isetyenziselwa ukukhusela izixhobo zombane malunga ne-surges (i-overvoltages) ebangelwa ngumbane okanye utshintshi lwee-oshishino zokusebenza ezinzima (abaninzi abantu banokukungazibali le nto). Kungathatha imvelaphi yobugcisa xa ukhetha ifowuni ekhuselekileyo yokukhusela njengokuba kukho ubuchwepheshe obuhlukeneyo nemimiselo.
Umgangatho we-IEC 61643 uchaza iintlobo ze-3 zokukhusela izixhobo zokukhusela umbane wamandla ombane.
Uhlobo lwe-1 okanye iCandelo I: Uhlobo lwe-1 SPD inokukhupha umbane okhoyo ngoku kwaye ifakwe kwibhodi lokutshintsha kombane xa isakhiwo sikhuselekile kwinkqubo yokukhusela umbane (intonga yombane, phantsi komqhubi kunye nomhlaba).
Uhlobo lwe-2 okanye iCandelo II: Le divayisi yokukhusela (SPD) yenzelwe ukukhupha ngoku ngokuveliswa ngombane ongabonakaliyo obangela ukuba kuqhutywe umbane kwi-network distribution network. Ngokuqhelekileyo, zifakwe kwibala lokushicilela. Uhlobo lwe-2 SPD i-SPD eyaziwayo kakhulu kwiimarike kunye ne-Prosurge ibanika iziqinisekiso ezahlukeneyo.
Uhlobo lwe-3 okanye iCandelo III: Uhlobo lwe-3 SPD lusetyenziswe ukunciphisa ukugqithisa kwii-terminals zezixhobo ezichukumisayo kwaye ngoko ke kunomlinganiselo okhutshanayo wokukhutshwa kwamandla okwangoku.
I-SPD kufuneka ifakwephi?
Thayipha i-2 ifowuni yokukhusela ziya kufakwa kwi-switchboard yokuphela kombane. Ukuba umgama phakathi kweso sixhobo sokukhusela kunye nezixhobo ezikhuselweyo zidlula i-30 metres, esinye isixhobo sokukhusela (Uhlobo lwe-2 okanye uhlobo lwe-3) kufuneka lufakwe kufuphi nesixhobo.
Xa isakhiwo sikhuselwe yinkqubo yokukhusela umbane, a Thayipha i-1 ifowuni yokukhusela kufuneka ifakwe kwisithuba esingenayo sofakelo. Kwakhona, unokhetha uhlobo lwe-1 + 2 SPD okanye uhlobo lwe-1 + 2 + 3 SPD njengoko banokuthi banciphise umbane kwaye bagcine iindleko ezithile kwezinye iimeko.
Yisiphi ukukhutshwa kwamanje okwaneleyo? Phezulu ku bhetele?
kuba Uhlobo lwe-1 lukhuphe izixhobo zokukhusela, imfuneko emncinci yindlela yokukhupha i-Iimp = 12.5 kA (10 / 350). Umthamo okhoyo okhoyo ngoku Uhlobo lwe-2 SPD 40kA. Qaphela ukuba ukukhutshwa kwamanzi okuphezulu akuthethi ukuba bhetele. Kuthetha nje ukuba i-SPD inokunyamezela i-surge kwaye ibe ngoko inokuphila ixesha elide kwaye ke kufuneka ifune indawo enye. Kakade ke, kwindleko yexabiso eliphezulu:)
Indlela yokulungelelanisa ifowuni yokukhusela i-breaker okanye i-fuse?
Kuxhomekeka kumjikelo wesekethe omfutshane onokwenzeka kwindawo yofakelo. Umgaqo wesithupha, wendawo yokuhlala yombane, isixhobo sokhuselo esine-Isc <6 kA siya kukhethwa kunye nokusetyenziswa kweofisi, i-Isc ngokubanzi <20 kA.
Ewe unokujonga kunye nokufakwa kwe-SPD. Olu lwazi luyafuneka ekukhetheni isixhobo esifanelekileyo sokwenza isipele.
