LIVE WORKING - EARTHING OR EARTHING AND SHORT-CIRCUITING EQUIPMENT USING LANCES AS A SHORT-CIRCUITING DEVICE - LANCE EARTHING
International Electrotechnical Committee
Foreword
1. Scope
2. Normative references
3. Definitions
3.1 Tests
3.2 Special terms
4. Electrical characteristics
5. Requirements
5.1 General
5.2 Earthing cables
5.3 Lances, lance contacts and guiding components
5.4 Insulation co-ordination with assemblies
5.5 Co-ordination with assembly enclosure
5.6 Marking
5.7 Manufacturer's instructions for use
6. Tests
6.1 General
6.2 Lance insertion and removal test
6.3 Test on reliability of stops and ability of lances,
couplings, handles and stops to withstand connecting
forces
6.4 Short-circuit current tests
6.5 Dielectric tests
6.6 Testing durability of marking
Figures
1 Illustrations of multi-phase earthing and short-circuiting
with one single lance
2 Illustration of multiple lance
3 Illustrations of multi-phase lance earthings with a set
of single lances
4 Illustrations of single-phase lance earthings
5 Typical test set-up for multi-phase lance earthings with
one single lance (used for voltages less than or equal to
36 kV)
6 Insulating handle and its preparation for voltage test
7 Typical test set-up for lance earthings with voltages
more than 36 kV
Tables
1 Special temperature categories
2 List of tests referred to subclauses and test categories
3 Peak current factor
Annexes
A Sampling procedure
B Short-circuit testing in a standardized test set-up of
multi-phase devices using a set of single lances
C Selection, use and maintenance of lance earthings
Applies to equipment for temporary earthing or earthing and short-circuiting of electrically isolated parts of a.c. installations, the disconnection of which has been verified, for the protection of workers while work is in progress using lance(s) as the earthing or earthing and short-circuiting device. States the performance and safety requirements and tests for lance devices with matching fixed contacts, guiding arrangements, enclosure, insulating elements and earthing cables, if any.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 78 |
