DE1044276B - Regulating device for the thermal stabilization of static capacitors with cold-sensitive dielectric - Google Patents

Description

The invention relates to a regulating device for thermal stabilization of static capacitors mk cold-sensitive dielectric by means of additional heating.

When operating the known designs of static capacitors at low temperatures In particular with capacitors filled with Clophen below 20 ° C, malfunctions often arise through a strong increase in viscosity, which in some cases even goes as far as the pour point of the filling, caused.

After restarting a cooled down Capacitor and the associated warming causes expansion of all built-in components Above all, the capacitor is mechanically less favorable. Way claimed. One therefore brings such capacitors by artificial heating to a temperature that a safe switching on enables.

In the known designs of such heating devices, however, there is a risk that either overheating occurs or, after long-term disconnection of the capacitor, the heating is insufficient, to maintain the most favorable operating temperature.

These disadvantages are largely avoided by the regulating device according to the invention, that an electrical power source for heating the metallic. Condenser housing through Current flow is provided through this housing. To maintain the most favorable operating temperature are also in the regulating device according to the invention switching and control elements for switching on of the heating current, the actuation of which depends on the connection or non-connection of the capacitor depends on the network and the temperature of the housing.

The circuit diagram of the regulating device according to the invention can be taken from the drawing. The way of working is described as follows:

In order to take advantage of the heating of the capacitor that it has received during operation, it falls when it is switched off of the capacitor 7 with the switch 6 from a relay 2, which when the condensate current flows through a Current transformer 1 is held. In the closed-circuit state, the relay 2 closes a switching contact 8 and switches thus a Heiztransfbrmator 4, which acts as a current transformer is designed for direct heating of the capacitor housing. Because of the heating Regulating device

for thermal stabilization

of static capacitors

with cold-sensitive dielectric

Applicant:

Dominitwerke G. mb H.,
Hopp corner (Kr. Brilon)

Johann Delhey, Brilon,
has been named as the inventor

the condenser now only needs to be supplied with the heating power that it constantly needs releases into the environment through convection and radiation. For setting a specific temperature range serves a bimetal 3, which is housed in the capacitor housing. The bimetal strip closes when a temperature range of up to 10 ° C in the capacitor housing the circuit of a second relay 10, the relay picks up, and the heating process is interrupted by contact 11 as long as the temperature is sufficient to To close bimetal contact.

Claims (1)

PATENT CLAIM: Regulating device for the thermal stabilization of static capacitors with cold-sensitive dielectric by means of additional heating, characterized in that an electrical power source is provided for heating the metallic capacitor housing by current flow through this housing, and characterized by switching and control elements for switching on the heating current depending on the connection or The capacitor is not connected to the mains and is still dependent on the housing temperature. Legacy Patents Considered:
German Patent No. 950 144. 1 sheet of drawings