| ??? 12/11/04 12:30 Read: times |
#82943 - Snubbers? Responding to: ???'s previous message |
Were snubbers or varistors used on the contactor coil? With the relay in circuit you may be able to see arcing of the contacts when it operates the contactor coik - if this is the case a snubber or a varistor may go someway to resolving this problem. DC solenoid valves are particulary nasty in this regard - some have built in varistors or diodes ,some don't. I rarely have problems with my gear - maybe this is because I use switchmode power supplies - not only do they filter out a lot of garbage in the mains input, they are also tolerant of the brief brown-out when a motor is started. In many instances of trouble, it pays to do some measurements - you'd be amazed at what may be actually happening. Normally a number of problems conspire to give one big headache. |
| Topic | Author | Date |
| 440v ac routing problem | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| Every thing already done... | 01/01/70 00:00 | |
| language, guessing | 01/01/70 00:00 | |
| language, guessing | 01/01/70 00:00 | |
| Trapped ? | 01/01/70 00:00 | |
| first project | 01/01/70 00:00 | |
| debounce or noise | 01/01/70 00:00 | |
| contactor wiring | 01/01/70 00:00 | |
| guesses | 01/01/70 00:00 | |
| debounce or noise | 01/01/70 00:00 | |
| Does it mean? | 01/01/70 00:00 | |
| all done | 01/01/70 00:00 | |
| all done? | 01/01/70 00:00 | |
| 440v ac routing problem | 01/01/70 00:00 | |
| Snubbers? | 01/01/70 00:00 | |
| hi all i find the cause of problem | 01/01/70 00:00 | |
| enclosure ? | 01/01/70 00:00 | |
| enclosure ? | 01/01/70 00:00 | |
| Search, Search Search more and more..... | 01/01/70 00:00 | |
| box | 01/01/70 00:00 | |
| hiding info | 01/01/70 00:00 | |
hiding info | 01/01/70 00:00 |