BS 7740(1994) : 1994 AMD 9060
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
06-15-1996
11-23-2012
Committees responsible
National foreword
Specification
1. Scope
2. Normative references
3. Definitions
4. Data for electrical characteristics
5. Requirements
6. Tests
Annexes
A. (normative) Instructions for selection, use and
maintenance of earthing or earthing and short-
circuiting equipment
B. (normative) Sampling procedure
C. (normative) Interim rules for selection and testing
of earthing poles
D. (normative) Additional requirements and tests for
devices using cables connected in parallel
Tables
1. Special temperature categories
2. Minimum cross-section of earthing cable related
to the cross-section of the short-circuiting cable
and/or bar
3. List of tests referred to subclauses and test
categories
4. Pull test force on cable and connections
5. Maximum tightening torques to be applied for screw-
tightened clamps at the short-circuit current test
6. Peak current factor
B.1 Single sampling plan for normal inspection
C.1 Basic data for earthing poles
Figures
1. Illustrations of assembled portable equipment for
earthing or earthing and short-circuiting
2. Illustrations of three-pole earthing and short-
circuiting cable devices
3. Illustration of a three-pole earthing and short-
circuiting device with short-circuiting bar and
earthing cable
4. Test set-ups for testing multi-pole short-circuiting
devices for connection to rigid conductors
5. Test set-ups for testing multi-pole short-circuiting
devices for overhead lines
6. Test set-ups for testing single-pole devices for
overhead lines in single-phase systems and earthing
cables of multi-pole devices for overhead lines
7. Apparatus for fatigue testing with bending and
twisting
C.1 Arrangement for bending tests on earthing poles
D.1 Test set-ups for the testing of multi-pole short-
circuiting devices with parallel cables connected
between rigid conductors
D.2 Test set-ups for the testing of multi-pole short-
circuiting devices with paralleled cables connected
between conductors of overhead lines
D.3 Test set-ups for the testing of the following
earthing and short-circuiting devices using cables
connected in parallel
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.