DE447411C - High voltage ground rod - Google Patents

Description

GERMAN EMPIRE

ISSUED ON JULY 23, 1927

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21c GROUP

High-voltage earthing rod, patented in the German Empire on May 8, 1926.

The invention relates to a high voltage ground rod. The previous handling of the Earthing of high voltage overhead lines and apparatus was mostly done by Throwing over or creating grounding chains. This handling endangered the executor both when there is residual tension and when it is accidentally Earthing parts under high voltage.

The previously known earthing rods mostly ended in a simple metal rod with connected earthing cable. These known grounding rods are simply applied to the high-voltage line. This grounding, or even grounding with chains, was particularly important for overhead lines (Aluminum or copper overhead lines with an oxide layer) do not always make safe contact. This disadvantage is avoided by the subject matter of the invention.

Secure contact is increased by the two contact springs, which are bent in a wave shape Dimensions achieved by the fact that the inner surfaces at the pre-contact of the two Contact springs are roughened like files and when the springs are pulled over the Line rope before finally enclosing any existing oxide layer or impurities remove the rope. The resilient force of the clamps is made even more special Coil spring increased. As a result of the wave-shaped metal clamp, it can be used for the various common rope cross-sections be used; the rope is always firmly enclosed by the spring clip. By the abovementioned blank rubbing with the help of the line-like pre-contact is a safe one

End with the part to be grounded | perform.

This arrangement achieves the following advantages:

i. By removing the oxide layer and contaminants from the ground Line or switchgear part is a good contact through the roughened file-like Pre-contact of the terminals secured. The removal of this oxide layer has always been up to now carried out by hand with a wire brush or scraper and thus posed as a result of the possible residual voltage poses a risk to the person carrying out the work.

2. The man working on the earthing is no longer through any still existing Voltage as endangered as when grounding with chains.

3. Due to the metal clamps and surfaces that are sufficiently strong, there is a brazier. be ^; possibly still occurring high earth or. Short-circuit currents no longer possible. In the drawing, the subject matter of the invention is shown schematically. Fig. 1 is the side view with the insulating rod indicated by dotted lines. Fig. 2 shows the top view of the grounding device. i ^a is the insulating rod, i ^b an attached metal tube that is pressed flat upwards with the contact spring 2 rotatably arranged on it. The second spring band S is fastened to the tip with the screw 3. 4 is a wing nut with two spiral springs that can be adjusted depending on the cross-section; 6 is the earthing cable with the connection contact. The file-like roughened areas are clearly marked at 5 and 2.

The handling of the earthing rod is as follows:

After the clamp attached to the end of the grounding cable with a well grounded If the iron part has been electrically connected, the earthing rod is attached to the insulated handle bar taken and the contact spring slipped over the rope to be earthed. With 4t> the roughening removes any oxide layer or contamination present and the Earthing clamp pulled further over the rope into the wave-like bulge. Depending on the cross-section of the rope, the Metal clamp adjusted with the help of the spiral spring.

Claims (1)

Claim: High voltage earthing rod with clamp-like head equipment which is on a insulated rod is rotatably applied and is connected to the earth via an earthing cable, characterized in that that the grounding clamp consists of two mutually adjustable, wave-like metal ribbon springs exists, which is like a file inside at the entry point for the overhead line are roughened. Fig.i. Fig. 2. i® I ^u