| 詳細(xì)參數(shù) | |||
|---|---|---|---|
| 品牌 | other | 型號 | PM01-A-V001 |
| 結(jié)構(gòu)形式 | 模塊式 | 安裝方式 | 控制室安裝 |
| LD指令處理器 | 硬PLC | 工作電壓 | 24VDC |
| 輸出頻率 | 10/100Mbps | 程序容量 | 2兆字節(jié) |
| 數(shù)據(jù)容量 | 16MB | 環(huán)境溫度 | 0°C至60°C |
| 環(huán)境濕度 | 5%-95%非冷凝 | 加工定制 | 否 |
PM01 PM01-A-V001
PM01 PM01-A-V001 在自動控制電路中有以下保護(hù)環(huán)節(jié)，也是一般自動控制電路共有的保護(hù)環(huán)節(jié)。
（1）短路保護(hù) 電機、電器和導(dǎo)線的絕緣損壞或發(fā)生故障時，可能造成短路事故。很大的短路電流產(chǎn)生過熱和電動力可能引起電器設(shè)備損壞，甚至因此引起火災(zāi)，因此要求一旦發(fā)生短路故障時，控制電路應(yīng)能迅速地切斷電路。
PM01 PM01-A-V001短路保護(hù)的常用方法是采用熔斷器或斷路器。這些保護(hù)裝置不應(yīng)受起動電流的影響而誤動作。所以要按熔斷器、斷路器的選擇和整定要求進(jìn)行。
（2）長期過載保護(hù)和斷相保護(hù)
PM01 PM01-A-V001電動機長期超載運行，繞組溫升將超過其允許值，造成絕緣材料變脆、壽命縮短，嚴(yán)重時還會使電動機損壞。過載電流越大，達(dá)到允許溫升的時間就越短。常用的長期過載保護(hù)元件是熱繼電器。熱繼電器不能兼作短路保護(hù)，因為發(fā)生短路時，它可能還來不及動作就已對電器設(shè)備造成損壞了。
據(jù)統(tǒng)計，因斷相運行而燒壞電動機的臺數(shù)，在有些單位竟多達(dá)損壞電機總臺數(shù)的80%以上，所以電動機應(yīng)該有斷相保護(hù)的環(huán)節(jié)，也就是說要選用帶斷相保護(hù)功能的熱繼電器。
In the automatic control circuit, there are the following protection bs, PM01 PM01-A-V001which are also common to the general automatic control circuit.
Short circuit protection may cause short circuit accidents when the insulation of motors, electrical appliances and wires is damaged or fails. Overheating and electric power generated by large short-circuit current may cause damage to electrical equipment and even fire. Therefore, in case of short-circuit fault, the control circuit shall be able to cut off the circuit quickly.The common b of short-circuit protection is to use fuse or circuit breaker. These protective devices shall not misoperate under the influence of starting current. Therefore, it shall be carried out according to the selection and setting requirements of fuse and circuit breaker.
PM01 PM01-A-V001 Long term overload protection and open phase protection。If the motor is overloaded for a long time,PM01 PM01-A-V001 the winding temperature rise will exceed its allowable value, resulting in brittle insulation materials, shortened service life and serious motor damage. The greater the overload current, the shorter the time to reach the allowable temperature rise. The common long-term overload protection element is thermal relay. Thermal relay can not also be used as short-circuit protection, because in case of short-circuit, it may cause damage to electrical equipment before it can act
