Feature description
YB3系列隔爆型三相异步电动机（机座号63-355）（以下简称电动机），按照GB3836.1-2010《爆炸性环境 第1部分：设备通用要求》和GB3836.2-2010《爆炸性环境 第2部分：由隔爆外壳“d”保护的设备》的要求，制成隔爆型。防爆标志为ExdIMb。适用于含有甲烷或煤尘的煤矿井下固定式设备上，作为一般动力设备便用。
电动机防爆性能符合GB3836.1-2010《爆炸性环境 第1部分：设备通用要求》、GB3836.2-2010《爆炸性环境 第2部分：由隔爆外壳“d”保护的设备》的规定：电气性能执行JB/T7565.1-2011《隔爆型三相异步电动机技术条件 第1部分：YB3系列隔爆型三相异步电动机（机座号63-355）》的规定。
Characteristic description
Yb3 series explosion-proof three-phase asynchronous motor (frame No. 63-355) (hereinafter referred to as motor) is made into explosion-proof type according to the requirements of gb3836.1-2010 explosive environment Part 1: General requirements for equipment and gb3836.2-2010 explosive environment Part 2: equipment protected by explosion-proof enclosure "d". The explosion-proof sign is exdiimb. It is applicable to the fixed underground equipment containing methane or coal dust, which is used as general power equipment.
The explosion-proof performance of motor complies with gb3836.1-2010 explosive environment Part 1: General requirements for equipment, gb3836.2-2010 explosive environment Part 2: equipment protected by flameproof enclosure "d": the electrical performance shall comply with JB / t7565.1-2011 technical conditions for flameproof three phase asynchronous motor part 1: Yb3 series flameproof three phase asynchronous motor (frame No.: 63-355 )》The rules of.
Motor model meaning
Range of use and conditions of use
1 Applicable to common flammable gases, vapor levels, and temperature groups.
2 Conditions of use:
2.1 The ambient air temperature varies with the seasons, but does not exceed 35°C, and the minimum ambient air temperature is -15°C.
2.2 The altitude does not exceed 1000m.
2.3 The maximum relative humidity of the ambient air does not exceed 95% (when the temperature is 25°C).
2.4 额定电压为380V、660V、380V/660V，可订制国外不同电压级。
2.5 The rated frequency is 50Hz, and the rated frequency can be customized to 60Hz.
2.6 The rating of the motor is a continuous rating based on the continuous duty system (S1), allowing full voltage starting.
2.7 电动机采用F级绝缘，定子绕组的温升（电阻法）按80K考核（其中机座号315L的2、4极和机座号355，允许按105K考核）。
Explosion-proof points
1 This series of motors are flameproof motors. When the explosive mixture inside the motor explodes, the flameproof enclosure should not be damaged or produce deformation that affects the flameproof performance; internal explosive flames are not allowed to cause external explosive mixtures through the flameproof joint surface of the enclosure The explosion, for this:
a. The parts that make up the explosion-proof enclosure, such as the base, end cover, bearing inner cover, junction box cover, junction box seat, etc., must pass 1.5MPa and pass the static pressure test of 100+2S after finishing;
b. The length gap and surface roughness of the flameproof joint, the electrical gap and the creepage distance between the exposed conductors in the junction box, between the exposed conductors and the metal shell.
c. The bolts connecting the flameproof enclosure are equipped with spring washers to prevent self-loosening, and the yield stress of the fastener is greater than or equal to 640Mpa, that is, the fastening bolts should be made of 8.8 grade Q235 steel.For mining products, fasteners that are susceptible to external force impact should also be provided with a retaining ring.
d. The base, end cover, bearing inner cover, junction box seat, junction box cover, wiring bolt, terminal cover (or wiring board), shaft, and sealing ring are flameproof components.The material of the sealing ring is rubber XH-21.
2 In the rated working state, the surface temperature of the motor shell shall not exceed +130℃, and the temperature outside the wire inlet shall not be higher than the allowable temperature of the cable used to ensure the reliable operation of the cable.
