升降機用電量較大，它是大型施工電梯械設備，所以它的電源安全防護措施必須是安全可靠。

1、升降機電源一般采用普通308V、50Hz的三相五線交換電源供電，施工工地供電應當要做到“三級配電，兩級維護”的用電標準要求。施工電梯須設置專用的開關箱，電壓穩定應當不能超過±10%的額外值，供電容量應能滿足設備的最低供電容量，絕緣電阻應大于0.5M。
Lift the power generally use ordinary 308V, 50Hz three-phase five-wire switching power supply, power supply construction sites should be to achieve the "three-tier distribution, two maintenance"power standards. Construction elevator shall be provided with a dedicated switch boxes, voltage stability should not exceed ± 10% of the additional value, the power supply capacity should be able to meet the minimum power capacity of the equipment, the insulation resistance should be greater than 0.5M.
2、升降機按劃定應設置好過流、短路、欠壓、過壓及零位掩護、失壓保護、電源錯相和斷相保護等措施；設備的專用開關箱應設有門鎖，且設備的防護等級應高于P44，應當設有升降機緊急停止按鈕完善的設施。
Lifts should be set according to delineate better flow, short circuit, undervoltage, overvoltage and zero cover, voltage protection, power-phase and phase failure protection and other measures;special switch box equipment shall be provided with locks, and equipment protection rating should be higher than P44, should lift the emergency stop button has excellent facilities.