DD288037A5 - CIRCUIT ARRANGEMENT FOR SWITCHING POWER LEVELS FOR DOSING ENERGY SUPPLY FOR RECYCLING PROCESSES FOR TWO OVERHEAD OF SEPARATELY LOCATED LOCATIONS WITH MUTUAL LOCKING - Google Patents

Abstract

The invention relates to a circuit arrangement for switching power levels for metering the energy supply for Erwaermungsprozesse at two locally separate locations with interlocking and power level indicator, which is inventively so solved that switching to other power levels from two different locations from only possible, if the corresponding location is active. This activation can only be achieved if there is coincidence with the power level set by the other location. The power levels can be freely selected in number. The selected power level is displayed. Each site can be activated for itself at the site itself. Mutual locking ensures that only one location is active. {Control; Regulation; Power switch; Stage circuit; Erwaermungsmaschinen; Vergieszeinrichtung}

Description

For this 1 page drawing

Field of application of the invention

The invention finds application in the necessary dosage of electrical energy for heating processes, the power of the step transformer with the corresponding taps is removed and controlled by Sagittarius heating process, the switching of the power levels must be possible from two separate locations and sine mutual interlocking is necessary , especially in Vergießeinrichtungen, in which the control cabinet unr? Utelbar is next to the potting and the power cabinet for the gradation of the heating power including balancing and compensation in the closed electrical operating room is, but must be made from both locations optionally the power switching.

Characteristic of the known state of the art

From practice it is known that there are a variety of ways to make two locally separate switching points act on switching elements for energy metering.

This works so that the switch being engaged is displayed. Switching to the 2nd switch is possible in any switching state, even if the two switches are not coincident. An indication of both the one and the other switch on the same switch does not exist.

The biggest disadvantage, however, is the possible switching from one switch to the other, even in the case of non-coincidence. - This has the consequence that occur in differences between the respective switch positions of the switch uncontrolled switching operations for subsequent power contactors.

In the journal "The Electric Doctor" of the years 1979 to 1989 and the documentation of machine tools such as the companies:

- Forming technology Erfurt

- "Fritz Hecken" Karl Marx City

- WEMA Aschersleben

- Mikromat Dresden

- WEMAAuerbach

a variety of such circuits are described, all of which have the disadvantage of switching to the second switch even when the two switches are not coincident.

Object of the invention

The object of the invention is to find a way of making it possible to dose the energy supply of heating processes from two separate locations. Each location is activated for itself, whereby only one location is active and the activation can only take place when the coincidence of the power level switch is given

 For this purpose, the mutual switch position is displayed.

Explanation of the essence of the invention

The invention is based on the object to expand the previously known control systems of heating processes, so that the dosage of power levels from two different locations from is possible to make so once directly at the heating point and the other in a substation, the power metering.

According to the invention the object is achieved in that depending on the two locations from each other only one location is active, the active or passive state is displayed and also the switch position of the tap changer is displayed to each other. The activation of the location can be done by means of buttons on the location to be activated itself.

Thus, both locations are equal and interlocked in their function, Eodaß a Fehlechaltung is avoided by the simultaneous switching of more than one heating stage in the switching process of the site and the switching operations on the tap changer of the passive location remain without effect. The features of the invention are as follows.

- Using a circuit variant to dose the energy supply of heating processes from two different locations.

- Using a circuit variant, the two sites completely equal.

- Use of a circuit variant that allows the activation of the necessary location on itself.

- Use of a circuit variant that enables the activation of the site only if both tap changers have the same circuit at both locations.

- Use of a circuit variant, which indicates the switch position of the tap changer for metering the heating energy to the other location.

Ausführungsbelsplel The invention will be explained in more detail below according to the figure 1 embodiment. The associated circuit represents the operating circuit. The button S1 with its feedback H1, the step switch S3,

the LEDs V1 to Vn are installed at the location A, the button S 2 with its feedback H 2, the tap changer S4, the

LEDs Vn + 1 to Vn + η are installed at site B. All other components are included in the controller and are in

central control cabinet.

When the operating voltage is switched on, the lamp H2 in button S2 is activated via the relay contact Kl. 2, KI.4.

which indicates dan activated state of the site B for power metering via the tap changer S4.

At the same time relay K3 switches on actively. The second contact system step switch S4 at location B can be used to switch on the required power level

respectively. The set power level (eg 1) is passed through the first contact system of the tap changer S4 through the LED

Vn + 1 at location B, the LED V1 at location A is displayed. The respective display changes with the power level of the on-load tap-changer S4 in location B. If the power switching from location A to take place, then the switch position of the tap changer S 3 at the location A in Accordance with the indicated by the light emitting diodes V1 to Vn and thus switched on power level of Bring step switch S4 to location B As a result of the coincidence of both tap-changers, the relay K2 attracts via a connecting line. Thus, via switch S1 at location A, the contacts of relays K2 and K3 can switch S2 to location B of relay K1

tighten, which holds itself over the own contact K1.1, the button S 2 at the location B itself.

If now the power metering of the heating again take place from the location B, the step switch S 4 is at the location B in accordance with the indicated by the light emitting diodes Vn + 1 to Vn + η and thus switched power level

of the tap changer S 3 at location A to bring.

As a result of the agreement of both tap-changer pulls the relay K3 via a connecting line. Somes the relays K2 and K3 are energized and the latching of the relay K1 can by means of the activation button S 2 with the Lamp H 2 at location B will be lifted. Site B is thus active again.

Claims (3)

1. Circuit arrangement for switching power levels for metering the power supply for heating processes in two locally separated locations with interlocking and power level indicator, characterized in that both locations are fully equal and the activation of the location of each site can be made for themselves. 2. A circuit arrangement according to claim 1, characterized in that the set at the active location for power level switching power level is displayed at both locations. 3. A circuit arrangement according to claim 2, characterized in that the activation of the non-active location can only take place when the power stage switch of the non-active location is brought into coincidence with the displayed setting of the tap changer of the active site.