電(dian)路發(fa)生時(shi)的(de)電(dian)流稱為(wei)諧振電(dian)流，用(yong)Io表示，當電(dian)源(yuan)電(dian)壓一定(ding)時(shi)：可根(gen)據(ju)RLC串聯電(dian)(dian)(dian)(dian)路的(de)電(dian)(dian)(dian)(dian)流是(shi)否達到最大(da)來判斷是(shi)否發(fa)生了串聯諧(xie)(xie)振(zhen)(zhen)。c.L、C上電(dian)(dian)(dian)(dian)壓大(da)小相等(deng)，方向相反，相互抵消。因此串聯諧(xie)(xie)振(zhen)(zhen)又稱(cheng)為電(dian)(dian)(dian)(dian)壓諧(xie)(xie)振(zhen)(zhen)，諧(xie)(xie)振(zhen)(zhen)時電(dian)(dian)(dian)(dian)感和電(dian)(dian)(dian)(dian)容(rong)兩端的(de)等(deng)效阻抗(kang)為0，相當于短路。電(dian)(dian)(dian)(dian)阻上的(de)電(dian)(dian)(dian)(dian)壓等(deng)于電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)壓，達到最大(da)值。
變頻串聯諧振成套裝置(zhi)所(suo)需(xu)(xu)電(dian)源容(rong)量(liang)大(da)大(da)減小。HTXZ系(xi)列(lie)串聯諧振是利用諧振電(dian)抗(kang)器和被試品(pin)電(dian)容(rong)產生諧振，從(cong)而(er)得到所(suo)需(xu)(xu)高(gao)電(dian)壓和大(da)電(dian)流的，在整(zheng)個系(xi)統(tong)中(zhong)，電(dian)源只需(xu)(xu)要提供系(xi)統(tong)中(zhong)有(you)功(gong)消耗的部(bu)分(fen)，因此，試驗所(suo)需(xu)(xu)的電(dian)源功(gong)率(lv)只有(you)試驗容(rong)量(liang)的1/Q倍(Q為品(pin)質因素)。
2. 設(she)備的重(zhong)量(liang)和(he)體積大大減小(xiao)。串聯諧(xie)振電源中，不但省去了笨重(zhong)的大功(gong)率調壓(ya)裝置和(he)普(pu)通(tong)的大功(gong)率工頻試驗(yan)(yan)變壓(ya)器，而(er)且，諧(xie)振激(ji)磁電源只需試驗(yan)(yan)容(rong)量(liang)的1/Q，使得系統重(zhong)量(liang)和(he)體積大大減小(xiao)，一般為普(pu)通(tong)試驗(yan)(yan)裝置的1/5——1/10。
3. 改善輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)波(bo)形。諧振電(dian)(dian)(dian)(dian)源是諧振式濾(lv)波(bo)電(dian)(dian)(dian)(dian)路(lu)，能改善輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)的(de)波(bo)形畸變，獲(huo)得很好的(de)正弦波(bo)，有效(xiao)地(di)防(fang)止了諧波(bo)峰(feng)值引起的(de)對被試品的(de)誤擊(ji)穿。
4. 防止大的(de)短(duan)路(lu)電(dian)(dian)(dian)流(liu)(liu)(liu)燒傷故障點(dian)(dian)。在諧(xie)振(zhen)(zhen)狀態，當被(bei)試(shi)品(pin)的(de)絕緣弱點(dian)(dian)被(bei)擊穿(chuan)時(shi)(shi)，電(dian)(dian)(dian)路(lu)立(li)(li)即脫諧(xie)(電(dian)(dian)(dian)容量變化，不滿(man)足諧(xie)振(zhen)(zhen)條件)，回(hui)路(lu)電(dian)(dian)(dian)流(liu)(liu)(liu)迅速(su)下(xia)降為正常(chang)試(shi)驗電(dian)(dian)(dian)流(liu)(liu)(liu)的(de)1/Q。而采用并聯(lian)諧(xie)振(zhen)(zhen)或者傳統(tong)試(shi)驗變壓器的(de)方(fang)式進行交流(liu)(liu)(liu)耐(nai)壓試(shi)驗時(shi)(shi)，擊穿(chuan)電(dian)(dian)(dian)流(liu)(liu)(liu)立(li)(li)即上(shang)升(sheng)幾十倍(bei)(bei)，兩者相比，短(duan)路(lu)電(dian)(dian)(dian)流(liu)(liu)(liu)與(yu)擊穿(chuan)電(dian)(dian)(dian)流(liu)(liu)(liu)相差數百倍(bei)(bei)。所以(yi)，串(chuan)聯(lian)諧(xie)振(zhen)(zhen)能(neng)有(you)效地(di)找到絕緣弱點(dian)(dian)，又不存在大的(de)短(duan)路(lu)電(dian)(dian)(dian)流(liu)(liu)(liu)燒傷故障點(dian)(dian)的(de)憂(you)患。
5. 不會出現任何恢復過電(dian)壓(ya)。被試(shi)品(pin)發(fa)生擊(ji)穿閃絡時，因失(shi)去諧振條(tiao)件，高電(dian)壓(ya)也立即消失(shi)，電(dian)弧立刻(ke)熄滅，裝置的保護(hu)回路動(dong)作(zuo)，切斷輸出。
