Safe Working on Electrical Installations by DEHN | Earthing & Short-Circuiting Devices

Published 21 Mar 2023

Earthing & Short-Circuiting Devices Electrical Safety

Safe Working on Electrical Installations

Earthing and Short-Circuiting Devices

Save you life during work on electrical installations

When working on electrical installations, it is crutial that the five safety rules are observed.

Earthing and short-circuiting at the work location is the key element of these rules. It ensures a de-energised state for the duration of the work in case of interference voltages, atmospheric overvoltages or accidental re-connection.

Thorne & Derrick provide an extensive range of electrical safety equipment including insulating gloves, voltage detectors, insulating matting and portable earthing to ensure worker safety when carrying out maintenance on LV-HV switchgear, substations, cables and electrical equipment.

Five Safety Rules
In Accordance with EN 50110-1 (DIN VDE 0105-100)

1. Disconnect completely
2. Secure against re-connection
3. Verify that the installation is dead
4. Carry out portable earthing and short-circuiting
5. Provide protection against adjacent live parts

The installation must be disconnected completely and secured against re-connection first. After testing and verifying with a voltage detector that the installation is dead, the earthing and short-circuiting device is connected to the earthing system. Then, it is connected to the parts to be earthed using an earthing stick. The earthing and short-circuiting device should be visible from the work location.

Electrical safety Equipment From DEHN

Short-circuiting cable

The transparent node unit and cables ensure easy visual inspection and allow the user to immediately detect signs of damage and corrosion. The cables and the connection element are fixed, thus preventing this connection from becoming loose even in case of the dynamic load of short-circuit currents. The cables are particularly robust and available with a cable crosssection up to 150 mm².

Laser marking
The new laser marking on the short-circuiting cable ensures permanent marking with the most important product information – directly on the product.

Universal clamp
We have clamps for every application: For fixed ball points with a diameter of 20 mm and 25 mm and flat clamps for copper bars. The PVC-sheathed cable lug ensures protection against twisting and damage.

Ball head cap
Ball head caps are available as rigid and adjustable ball head caps. A ball head cap that can be rotated by 4 x 90° allows the earthing and short circuiting device to be used in the most favourable position. The connection between the fixed ball point and the ball head cap ensures an extremely high degree of short-circuit strength.

Earthing and short-circuiting devices are produced in a standard-compliant and proven manner and are extensively tested in our test laboratories.

In-house production of all components ensures maximum quality and safety in terms of function and handling. With earthing and short-circuiting devices from DEHN you are always on the safe side.

Earthing and short-circuiting configurator

Easy online configuration of earthing and short-circuiting devices

Safe working on electrical installations is only ensured if the earthing and short-circuiting device is configured correctly. Thus, the selection of the earthing and short-circuiting device is always the first step. The new earthing and short-circuiting configurator makes selection easy:

• The intuitive menu navigation allows quick selection of the right earthing and short-circuiting device for your application.
• Precise and perfectly harmonised selection of the connection elements and earthing and short-circuiting cables.
• The variant number allows to clearly identify the finished product and order it at a later date.
• You may also use the Part No. of your previous orders for configuration.
• The selected product can be added to the shopping cart, sent via e-mail or printed.
• The technical data on the product are directly linked – online and thus always up to date.

➡ New earthing and short-circuiting configurator

Earthing and short-circuiting device in 8 steps

1. Selection mode
   First select
   a. Product view or
   b. System view
   Select the product view if you already know which cable cross-section and clamps are to be used. In the system view the parameters of the switchgear installation are entered, for example the maximum short-circuit current and the type of earthing. Whether product or system view – both solutions lead to a technically sound earthing and short-circuiting device.
2. Basic structure
   Define the basic structure of the earthing and short-circuiting device.
3. Phase cable end cross-section
   Select the phase cable end cross-section of the short-circuiting cables.
4. Earth cable end cross-section
   Decide whether the earth cable ends should have the same cable cross-section or a reduced cable cross-section.
5. Phase cable end equipment
   Select the shaft type and connection element to be used on the phase cable end.
6. Earth cable end equipment
   Select the operation and connection element for earth cable ends.
7. Earthing stick
   Optional earthing sticks are available as accessory in different lengths and versions.
8. PDF of your selection
   You can print the result of your selection, add it to the shopping cart or send it via e-mail. You may certainly return to your selection to make changes.

DEHN

DEHN are committed to the protection of workers and material assets. The energy and the spirit of innovation of more than 1,400 employees are reflected in their developments and innovative products in the field of lightning protection, surge protection and safety equipment.

The continuous growth of the DEHN group reflects their strong commitment to lightning protection, surge protection and safety equipment. The company’s global network of 11 subsidiaries and numerous sales partners passes on know-how and distributes high-quality products that are produced at their headquarters.

DEHN ensure that your buildings and installations are protected during operation, maintenance and repair. Their focus is particularly on wind energy, photovoltaic, process industry, traffic and communication solutions. You can be assured: DEHN protects.

ELECTRICAL SAFETY PROVIDERS

We protect substation engineers, asset managers, SAPS, cable jointers, overhead linesmen and utility workers with PPE and safety equipment: this includes insulating gloves, arc flash clothing, voltage detectors, insulating matting and portable earthing to ensure worker safety when carrying out repair and maintenance on LV-HV switchgear, transformers, substations and turbines.

All of our Cable Connection & Energisation Accessories including Medium & High Voltage joints, terminations, connectors and cleats are tested to the latest international standards and supporting ranges of professional installation tools are stocked to reduce incident, accident and downtime to plant and people.