SU507247A3 - Over-temperature alarm - Google Patents

Description

(54) DEVICE FOR EXCEEDING ALARM

TEMPERATURES

again interacts with the field of the permanent magnet in the interval (A – B) d, 1,.., which is slightly less than the) state (A – B) of max.

The case 8 is made of a non-magnetic mat.

Ferrites are placed on the board, equipped with a set screw and located above the magnetically controlled contacts n on the sources of the control magnetic zero, each shunt is provided with a fitting with a nut placed in the housing section; With the help of the adjusting screw, a certain position of the shunt is set in the small gap (A-B) of the max. The leads 9 serve to connect the magnetic contacts to the external cable.

The machine's working readiness position is set so that the frith shuit is supplied to the screw with the help of a choke. In this state, there is no connection between the contacts. When the ferrite, i.n., iodine, by the action of a flame in the environment, reaches the Curie point, a connection arises between the contacts, as a result of which a corresponding electrical signaling circuit is triggered on the remote control panel. This alarm continues when the temperature drops to a value below the Curie point, until the duty personnel notice the signal and break this circuit.

The described device, under normal conditions, is transferred to the initial state of working readiness by means of a ferrite shunt, which is removed a distance shorter (A-B) max. And then brought to the set screw.

The device works reliably for quite a long time. Its contacts are sealed, the permanent magnet is installed in a plastic case and is corrosion resistant. 5 The advantage of an on-write device is that it does not consume electricity when in a state of readiness. Its installation is simple, for this it is only necessary to connect the locking contacts through

0 line to the signal circuit on the control panel via two ground wires or one common ground. The electrical properties of the contacts allow connection to an already operating manual switch, so the alarm becomes automatic.

Claims (1)

Invention Formula Device for alarm on exceeding 0 temperature, containing magnetically adjustable contacts, sources of the control magnetic field and ferrite shunt by the number of magnetically controlled contacts, distinguished by the fact that, in order to increase the reliability of the device in operation, in it the source control the magnetic field, and the ferrite shunts are placed on a board equipped with a set screw and located above the magnetically controlled contacts and sources of the control magnetic field, each shunt made of a material with The corresponding Curie point is above the ambient temperature and is supplied 5 fittings with a nut, placed in the slot Koptiyca.