DE202015004449U1 - Create and monitor mobile, safe grounding - Google Patents

Abstract

Housing for holding an explosion-proof battery (7), 3 illuminated points (1, 2, 3), a button (4), two flanged sockets that connect to the safe earth (5) and the ground connection (6) to be grounded object , characterized in that the line leads to the negative terminal to the battery via the ground (8).

Description

Companies that use flammable substances (paints, thinners, etc.) and combustible dusts (flour, sugar, coffee, coal dust, etc.) or who use these substances for processing must use suitable grounding. Temporary equalization connections (groundings) should be after DIN EN 60079 - 14 / VDE 0165 - Part 1 [2014-October] Article-No. 6.4.2 be equipped with a permanent monitoring and display.

• a) Es gibt Erdungssysteme, (z. B. zum Anschluss an 24 V AC/DC oder 230 V AC), die eine gute Erdung durch eine farbige LED anzeigen.
• b) Es gibt auch batteriebetriebene Erdungsüberwachungen mit 12 V DC Batterie.

These watches and ads are currently different as follows:

• a) There are grounding systems (eg for connection to 24 V AC / DC or 230 V AC) that indicate good grounding by means of a colored LED.
• b) There are also battery powered earth monitors with 12 V DC battery.

To a) If the good grounding is interrupted, the lit LED turns off, the device operation lamp (orange LED) keeps lit.

• 1) Ist die Verbindung zum zu erdenden Objekt gestört?
• 2) Ist die Verbindung zur sicheren Erde gestört?
• 3) Ist die Batterie leer und muss sie deshalb außerhalb des explosionsgefährdeten Bereiches gewechselt werden?

To b) If the good grounding is interrupted, the lit LED goes off, the operator in the production must then check:

• 1) Is the connection to the object to be ground disturbed?
• 2) Is the connection to the safe earth disturbed?
• 3) Is the battery empty and must it be replaced outside the potentially explosive area?

The grounding device with the battery must then be checked:
At what point is the fault? Object side? Ground side?
Is the battery to change?
These are the three questions that are eliminated by the new device.

The mobile ground with test capability works only with a 3 V DC battery. This battery is approved to European standards for use in potentially explosive atmospheres (Appendix 1). For this reason, the battery may be changed during use in the potentially explosive area of Zone 1 and 2 and Zone 21 and 22. The walk to the electrical workshop is eliminated, the production disruption is extremely short.

The device has a cable with a two-pole grounding clip ( 5 ), which is connected to the safe earth (PE) and a cable with a grounding clamp ( 6 ) for grounding the object, which must be grounded temporarily mobile.

A green LED is arranged on the device cover together with a red LED, a green LED is located on the front side. The two green LEDs light up when the connected object is well grounded.

Before starting work, earth them (TRBS 2153 / BGI 5127). Once the ground connection to the safe ground has been made and the object grounded. The green LEDs on the lid and on the front side light up. If now the test button on the housing cover is pressed, no indication is given, because the good function is shown "earth is good" and the battery voltage is sufficiently charged.

• a) Die grünen LEDs leuchten = die Verbindung zur sicheren Erde ist gut, der Erdungsanschluss zum zu erdenden Objekt ist gestört.
• b) Die grünen LEDs leuchten nicht = die Verbindung zur sicheren Erde ist gestört.

If the illumination of the LEDs is missing and the test button is pressed, the following illustrations are available.

• a) The green LEDs are lit = the connection to the safe earth is good, the grounding connection to the object to be grounded is disturbed.
• b) The green LEDs do not light up = the connection to the safe earth is disturbed.

• • Ob eine Störung anliegt und sehr schnelle Erkennung, welche Störung anliegt.
• • Die rote LED leuchtet eigenständig auf, wenn die Batterie zu sehr entladen ist und ausgewechselt werden muss.
• • Sicheres Erden mit Überwachen einer sicheren Erdung an jeder Stelle im Betrieb ohne Netzanschluss.

The device shown has the following advantages:

• • Whether there is a fault and very fast detection of which fault is present.
• • The red LED lights up on its own if the battery is too discharged and needs to be replaced.
• • Safe grounding with monitoring of a safe grounding at any point during operation without mains connection.

LIST OF REFERENCE NUMBERS

1

LED green

2

LED green

3

Red LED

4

test button

5

Earthing clamp - connection to safe earth

6

Earthing clamp - Connection to the object to be grounded

7

Explosion-proof battery "state of the art"

8th

Negative connection to the battery (blue)

9

battery

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• DIN EN 60079 - 14 [0001]
• VDE 0165 - Part 1 [2014-October] Article-No. 6.4.2 [0001]

Claims (8)

Housing for holding an explosion-proof battery ( 7 ), 3 illuminated dots ( 1 . 2 . 3 ), a key ( 4 ), two flanged sockets that connect to the safe earth ( 5 ) and the ground connection ( 6 ) to the grounded object, characterized in that the line to the negative terminal to the battery via the ground ( 8th ) leads. Grounding according to claim 1, characterized in that in the absence of ground connection ( 5 ) the negative pole to the explosion-proof battery is interrupted and a fault arises. Grounding according to one of the preceding claims, characterized in that by means of actuation of the test button ( 4 ) the connection from the object to be grounded ( 6 ) Is tested. Grounding according to one of the preceding claims, characterized in that the grounding connection is indicated via the object to be grounded by the illumination of the LEDs ( 1 . 2 ) Grounding according to one of the preceding claims, characterized in that there is a ground fault when the green LED goes out. Earthing according to one of the preceding claims, characterized in that the following states are displayed after detection of a ground fault and actuation of the test button: a) The green LEDs light up = the connection to the safe earth is good, the ground connection to the object to be earthed is disturbed ( 6 ) b) The green LEDs do not light up = the connection to the safe earth is disturbed. ( 5 ) Grounding according to one of the preceding claims, characterized in that the battery change in the housing only allows the change with an explosion-proof battery. All other openings are closed and sealed. Grounding according to one of the preceding claims, characterized in that the red LED lights up when the battery voltage is low and the battery should be replaced.

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