36,479
edits
Delay relay: Difference between revisions
m
no edit summary
mNo edit summary |
mNo edit summary |
||
| Line 3: | Line 3: | ||
A main relay that switches the anode voltages is controlled by a '''thermal delay relay''' such as the 6N045 or 6N030 which is housed in a miniature 9-pin glass tube enclosure. | A main relay that switches the anode voltages is controlled by a '''thermal delay relay''' such as the 6N045 or 6N030 which is housed in a miniature 9-pin glass tube enclosure. | ||
When the scope is turned on, a bi-metal strip in the delay relay is beginning to heat up. After the delay time (30 to 60 seconds depending on instrument), the bi-metal strip closes a contact that energizes the main relay. One of the main relay's contacts is used to make it self-holding while at the same time cutting out the delay relay, which is beginning to cool so it will be ready to provide delaying turn-on again in the event of a power outage. | When the scope is turned on, a bi-metal strip in the delay relay is beginning to heat up. After the delay time (30 to 60 seconds depending on the instrument), the bi-metal strip closes a contact that energizes the main relay. One of the main relay's contacts is used to make it self-holding while at the same time cutting out the delay relay, which is beginning to cool so it will be ready to provide delaying turn-on again in the event of a power outage. | ||
<gallery> | <gallery> | ||