Yueqing constant open Electric Co., Ltd. specializing in the production of low voltage electrical low voltage motor protector series: intelligent motor protection of ━ motor protector ━ motor protector ━ motor protection, etc. - Detailed Model: JDB motor protector ☆ ◇ ☆ ★ ◇ ◆ ☆ constant the open electrical sales hotline; 0577-62819667 constant open electrical proxy advisory; 13486766633 constant open electrical agents; manager Mr. Zhou Heng open electrical business QQ; Electrical fax 525 034 224 Constant open; 0577-62819687 main function, JDB motor protector "has a short circuit, stall, over-current, three-phase current unbalance, phase loss, overvoltage, undervoltage, leakage, under-current fault protection. Set of functions: field set the start time, the rated current, overvoltage value, voltage value, over-current time (inverse time characteristics), stall a multiple of the leakage current value, under current value, due to the flow for time Address number, three-phase current unbalance percentage, variable ratio transformer value, optional phase as any standard analog number of output 4 ~ 20mA current output error. 3: energized STOP; running status cycle three-phase current value of the A, B, C and supply voltage; protection status overcurrent, overvoltage, undervoltage value memory fault class character prompted; settings The status is displayed when the fault characters and settings. 4, protection of investment and rewind functions: protection functions can be cast back, and can be set to trip or alarm. In addition to the short circuit, stall, overcurrent, phase failure protection can only vote trip, the remaining protection (overvoltage, undervoltage, unbalanced, leakage, under-current protection) can be set to trip or alarm, detailed operation, see the instructions. Trip and alarm function: If users do not need to trip on some faults of downtime can be set to alarm (such as: overvoltage protection, undervoltage protection, unbalance protection, leakage protection, under-current protection) and signal. Communication functions: (optional) serial digital interface, messaging, a master station (PC) can be connected to the 256 protector, and each motor parameter settings, start and stop operation, easy automated management. The main technical indicators, measuring range: 0 ~ 999A current, voltage AC170V ~~ Voltage AC500V. 2, contact capacity: AC220V/5A, AC380V/3A electrical life of not less than 10 million times. 3, the start-up time: the tuning range of 1 ~ 99S, the start time of the stall, overcurrent, undercurrent does not protect only the short circuit, phase, overvoltage, undervoltage, leakage and three-phase current imbalance be protected. 4, short-circuit protection: When the current reaches the rated current work more than eight times the action time ≤ 0.2S. 5, stall protection: When the operating current of 3 to 8 times the rated current, the operating time ≤ 0.5S. 6, unbalance protection: When the difference between the three phases maximum current and minimum current, Imax -Imin/Imax ≥ P% action time ≤ 2.0S, the protection may cast trip or alarm. Use the scope and conditions of use 1,380 VAC 660VAC three-phase asynchronous motors, feeder circuit protection. Protector supply voltage; 220VAC, 380VAC, 50HZ. 3 Overall structure: whole and split in two forms, split install ≤ 5 meters away. Ambient temperature: -30 ℃ to +65 ℃, relative humidity ≤ 90%. 5, using the environment: without enough to corrode metal and destroy the insulation properties of the gas environment. 6, installed in rattling the impact of the strong magnetic interference spaces and sleet attack. 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