Portable Earthing & Short Circuiting Systems

Portable Earthing - UK Power Networks (EDF Energy)

United Utilities, Central Networks, Scottish Power Energy Networks

Western Power Distribution - DNO Approved

CATU Electrical design and customise Portable Earthing & Short Circuiting Kits to suit low, high and extra high voltage earthing applications with consideration to dimensions between points to be earthed, enclosed plant or limited working access, equipment fault level and short circuit rating of earthing system required - fill out and return the Checklist download below.

Portable Earthing & Short Circuiting Kits are available with a choice of earth clamps for both live-end and earth-end, jumper clamps for low voltage switchboards and overhead line clamps.

Portable Earthing equipment for high voltage electricity networks provides safe and reliable earth clamping where connections are to be made to dirty or heavily oxidised copper or aluminium busbars or stubs : this includes portable earthing systems for 33kV, 66kV, 132kV, 275kV and 400kV.

Details of UK National Grid overhead line and underground cable transmission system can be found here: http://www.nationalgrid.com/uk/landanddevelopment/ddc/electricitytransmission/overheadlines

Typical Portable Earthing Applications :

  • overhead transmission and distribution lines
  • susbstation busbars
  • rail electrification
  • transformer and switchgear terminals

Portable Earthing, Sequence of Use

  1. Switch out or de-energise electrical equipment or overhead line
  2. Prove voltage absence - check system is de-energised by voltage detector
  3. Connect to earth point with clamp - to this clamp connect a cable with interconnections to similar clamps arranged to connect with phase or potentially live equipment terminals. This ensures that if plant or electrical equipment is accidentally re-energised the short circuit caused by the temporary connections will activate the portable earthing and back up protection will protect against electric shock.

The CATU Electrical range of Portable Earthing & Short Circuiting Systems :

Portable Earthing for High Voltage Overhead Lines 

Portable earthing kits provide safe and secure clamping on extra high voltage overhead distribution lines during maintenance or erection.

High voltage (HV) and Extra High Voltage (EHV) earth-end and line-end clamps are manufactured from aluminium and manoeuvred by CATU CM-6 insulating sticks to IEC60855 standard - CM-6 insulated sticks allow working distances for portable earthing in a 2 to 6 metre range.

HV and EHV earth clamps suit 5-120mm diameter copper or aluminium conductor clamping with a test current of 40 kA/1s.

Flexible portable earthing leads (copper and aluminium) are available as 70sqmm, 95sqmm, 120sqmm or 150sqmm insulated with transparent PVC sheath.

Adobe CATU Electrical Safety - 2010 Catalogue

Adobe CATU Portable Earthing for Network Rail, Metro & Tram Systems

Adobe CATU LV Portable Earthing Short Circuiting - up to 1000v

Adobe CATU HV Portable Earthing Short Circuiting - 6.6kV 11kV 33kV up to 52kV

Adobe CATU EHV Portable Earthing Short Circuiting - 66kV, 132kV, 275kV, 400kV

Adobe CATU Portable Earthing to IEC61230 for High Voltage Substations

Adobe Portable Earthing Customised Enquiry Sheet

Adobe Portable Earthing & Short Circuiting Systems - Arcus

Adobe Portable Earthing & Short Circuiting Systems - Mosdorfer

Adobe Scottish Power Networks - Portable Earthing Approved Eqpt