Ninghao Bo Ji secret of business success lies in people, products, services, three quality persist. Skilled persons, help of trend momentum, not responsible for others, it can choose a man advantage. Business is war, quality pioneer. Quality control to improve the credibility, reputation and expand sales. Manufacture sophisticated products, cultivating talents. Plastic corporate image, a quality brand name. Quality - remain constant key to success. Standards Implementation of quality, certified image building. A quality brand, cast-class corporate image. Overview ZJDB-250T Motor Protector is a set of intelligent, user-friendly, high-performance motor integrated protection, this protection using an advanced 32-bit microprocessor, high-precision data processing, advanced signal acquisition, thereby so that the protection device for high precision, fast response, anti-interference ability. The protector has leakage blocking, loss of pressure, phase failure, phase unbalance, overload, short circuit protection, and a corresponding failure alarm. The protection is designed for coal mine 380V, 660V, 1140V power system integrated protection device in flameproof magnetic starter design and development, as well as to meet the state flameproof vacuum magnetic starter, digital transformation and specially designed can completely replace the original JDB or ABD8 type protection device, the switching function more perfect, the action value is more accurate. The user only needs protection against voltage and current setting, operation is very convenient. Is an ideal motor protection, to meet the actual needs of the scene, so that a unified economy and reliability with high performance and low cost. The basic parameters 1, Rated voltage: 1140V, 660V, 380V 2, Rated current: 1- 250A (step 1A) 3, integrated protection Power: AC36V 50Hz. 4, the integrated protection system for long-term work. Working conditions 1, no more than 2000 meters altitude, ambient pressure (0.8 ~ 1.1) × 105Pa 2, ambient temperature -5? С ~ + 40? С 3, air relative humidity less than 95% (+ 25? С) 4, in the absence of strong vibration and shock and vibration environments 5, containing methane and coal dust in the air, but not enough to corrode metal and damage the insulation of gas and steam environment 6, installed in various types of starter explosion chamber .