When the main switch is closed, the main transformer and the heater transformer 7agt;2 are connected to the supply, and the ... Simultaneously with the operation of the ignition circuit, contact AR2 is opened, thereby disconnecting a negative voltage from ... The oil burner is thus extinguished, and since the photocell is then not illuminated, thyratron Th3 becomes non- conductive and relay BR drops out.
Title | : | Industrial Electronics Handbook |
Author | : | Reinhard Kretzman |
Publisher | : | - 1959 |
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