SPD(Sesebelisoa se Sireletsang ho Tswela Pele, se sireletsang ho tjhesa) se sebediswa haholoholo ho thibela ho fetella ha motlakase ka nako e kgutshwane ho bakwang ke ho otlwa ke lehalima kapa tshebetso ya ho fetola gridi ho tloha ho senyang disebediswa. Ditheko le dibaka tse sebetsang tsa SPDS tse entsweng ka thepa le meaho e fapaneng di a fapana.

Karolo e tloaelehileng ea mantlha ea SPD ke zinc oxide varistor (MOV), e theko e tlase haholo 'me e na le lebelo le potlakileng la karabelo. E sebelisoa haholo tšireletsong ea meaho ea bolulo, meaho ea khoebo, likhabinete tsa kabo le lisebelisoa tsa indasteri. Theko ea MOV type SPD bakeng sa kabo e tloaelehileng ea motlakase o tlase hangata e tloha ho mashome ho isa ho makholo a yuan.

SPD e sebelisang liphaephe tsa khase tse ntšang motlakase (GDT) e na le bokhoni bo phahameng ba ho jara motlakase le ts'ebetso ea ho thibela ho ruruha, 'me e loketse tšireletso ea mela e fokolang ea motlakase liteisheneng tsa motheo tsa puisano, litsi tsa data, litsamaiso tsa ts'ireletso, jj. Theko ea eona hangata e phahame ho feta ea lihlahisoa tse tloaelehileng tsa MOV.

Lihlahisoa tsa SPD tsa maemo a holimo li tla amohela sebopeho sa motsoako oa MOV+GDT. Lihlahisoa tse ling li boetse li na le lisebelisoa tsa ho tsamaea ka mocheso, lipontšo tsa liphoso le mesebetsi ea alamo e hole, e fanang ka polokeho le ts'epo e phahameng. Li loketse libaka tsa bohlokoa tse kang lipetlele, litsamaiso tsa motlakase, lipalangoang tsa terene, liteishene tsa motlakase tsa photovoltaic le litsamaiso tsa taolo ea othomathiki ea indasteri, ka litheko tse tlohang ho makholo a 'maloa ho isa ho likete tse' maloa tsa yuan.

Bakeng sa mehaho e tloaelehileng ea liofisi, matlo le mabenkele, ho ka khethoa mofuta oa MOV SPDS o tloaelehileng. Bakeng sa libaka tse nang le mesebetsi e atisang ho etsoa khafetsa ea lehalima, likamore tsa puisano, litsi tsa data le merero ea bohlokoa ea indasteri, ho khothalletsoa ho khetha SPDS e kopaneng kapa e nang le matla a phahameng a motlakase ho ntlafatsa tšireletso ea lehalima le bokhoni ba ts'ireletso ea motlakase o feteletseng oa sistimi le ho netefatsa ts'ebetso e tsitsitseng ea nako e telele ea lisebelisoa.

.