BENTLY128275-01 模块

BENTLY NEVADA 128275-01 模块3500系统

BENTLY NEVADA 128275-01 模块3500系统

                                                      产品详情资料：

使用PLC/DCS 及安络的优点包括:

1 机械控制更大的集成性和灵活性

2 当标准控制层智能化时，能够进行更容易的故障诊断

3 更快、更方便的维护

4 减少安装、调试以及重新配置的费用

5 与对于逻辑单独使用继电器相比，降低了设计和硬件

如发现电动机温升过高，应立即停机处理。温升过高的原因如下：

 1、负载过大。若拖动机械传动带太紧和转轴运转不灵活，可造成电动机长期过载运行。这时应会问机械维修人员适当放松传动带，拆开检查机械设备位转轴灵活，并设法调整负载，使电动机保持在额定负载状态下运行。

     2、工作环境恶劣。如电动机在阳光下曝晒，环境温度超过40℃，或在通风不畅的环境条件下运行，会引起电动机温升道高。可搭简易凉棚遮荫或用鼓风机、风扇吹风，更应注意电动机本身通风道的油污及灰尘，以冷却条件。

     3、电源电压过高或过低。电动机在电源电压变动-5％—+10％范围内运行时，可保持额定功率不变。若电源电压超过额定电压的10％，会引起铁心磁通密度急剧增加，使铁损增大而导致电动机过热。具体检查方法是，用交流电压表测量母线电压或电动机的端电压，若是电网电压原因，应向供电部门反映解决；若是电路压降过大，应更换较大截面积的导线和缩短电动机与电源的距离。

     4、电源断相。若电源断相，使电动机单相运行，短时间就会造成电动机的绕组急剧发热而导致烧毁。因此，应先检查电动机的熔断器和开关状况，然后用万用表测量前部线路。

     5、由于笼型转子导条断裂、开焊或转子导条截面积太小，使损耗增加而发热，可在停机后测试转子温度，查找故障原因并予以排除。

     6、电动机起动频繁或正反转次数过多，应限制起动次数，正确***过热保护或更换适合生产要求的电动机。

     7、三相电压严重不平衡，应检查定子绕组相间或匝间短路及定子绕组接地情况。

8、轴承润滑不良或卡件，应检查轴承室的温度是否高于其他部位；检查润滑脂是否太少或干枯。

     9、通风系统发生故障，是因风路堵塞或散热片积灰太多、油垢太厚而影响散热。

    10、转子与定子铁心相接，产生连续的金属撞击声，会引起局部温升过高，应抽心检查，找出故障原因进行排除。

                         产品英文详情资料：

The advantages of using secure PLC/DCS and secure network include:

Greater integration and flexibility in mechanical control

When the standard control layer is intelligent, it can perform better and easier fault diagnosis

3 Faster and more convenient maintenance

Reduce installation, debugging, and reconfiguration costs

Compared to using safety relays alone for logic, it reduces design and hardware

If the temperature rise of the motor is found to be too high, it should be stopped immediately for handling. The reasons for excessive temperature rise are as follows:

1. Excessive load. If the mechanical transmission belt is too tight and the rotating shaft is not flexible, it can cause long-term overload operation of the motor. At this point, the mechanical maintenance personnel should be asked to relax the transmission belt appropriately, disassemble and check the flexibility of the mechanical equipment's rotating shaft, and try to adjust the load to keep the motor running at the rated load state.

2. The working environment is harsh. If the motor is exposed to sunlight, the ambient temperature exceeds 40 ℃, or operates in poorly ventilated environmental conditions, it can cause a high temperature rise in the motor. You can set up a simple greenhouse for shade or use a blower or fan to blow, and pay attention to the oil and dust in the ventilation duct of the motor itself to ensure cooling conditions.

3. The power supply voltage is too high or too low. The motor can maintain its rated power when operating within the range of -5% -+10% variation in power supply voltage. If the power supply voltage exceeds 10% of the rated voltage, it will cause a sharp increase in the magnetic flux density of the iron core, leading to increased iron loss and overheating of the motor. The specific inspection method is to measure the bus voltage or motor terminal voltage with an AC voltmeter. If the problem is caused by the grid voltage, it should be reported to the power supply department for solution; If the voltage drop in the circuit is too large, replace the wire with a larger cross-sectional area and shorten the distance between the motor and the power supply.

4. Power supply phase failure. If the power supply is disconnected and the motor operates in a single phase, it will cause rapid heating of the motor winding in a short period of time, leading to burnout. Therefore, the condition of the fuse and switch of the motor should be checked first, and then the front circuit should be measured with a multimeter.

5. Due to the fracture, open welding, or small cross-sectional area of the cage rotor guide bar, the loss increases and the rotor heats up. After stopping the machine, the rotor temperature can be tested to identify the cause of the fault and eliminate it.

6. If the motor starts frequently or has too many positive and negative rotations, the number of starts should be limited, and the overheating protection should be correct or the motor suitable for production requirements should be replaced.

7. If the three-phase voltage is severely unbalanced, the stator winding should be checked for inter phase or inter turn short circuits and stator winding grounding.

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