Introduction
1 General
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
2 Normal and special service conditions
2.1 Normal service conditions
2.2 Special service conditions
3 Requirements for the individual functional units
4 Ratings
4.1 Rated operating voltages
4.2 Rated insulation levels
4.3 Rated frequency
4.4 Rated normal currents
4.5 Rated short-time withstand currents
4.6 Rated peak withstand currents
4.7 Rated durations of short circuit
4.8 Rated supply voltages of closing and opening devices
and of auxiliary and control circuits
4.9 Rated supply frequency of closing and opening devices
and of auxiliary circuits
4.10 Rated power of CEADS
5 Design and construction
5.1 Earthing
5.2 Auxiliary equipment
5.3 Nameplate
5.4 Degree of protection and internal fault
5.5 Enclosures
5.6 Sound emission
5.7 Electromagnetic compatibility (EMC)
6 Type test
6.1 General
6.2 Dielectric tests
6.3 Temperature-rise tests
6.4 Measurement of resistance of the main circuit of
the HV functional unit
6.5 Short-time and peak withstand current tests on
main and earthing circuits
6.6 Functional tests
6.7 Verification of the degree of protection, the
resistance to mechanical impacts and calculation
of other mechanical stresses
6.8 Internal arcing tests
6.9 Electromagnetic compatibility tests (EMC)
6.10 Additional tests on auxiliary and control circuits
6.101 Verification of making and breaking capacities
6.102 Mechanical operation tests
6.103 Pressure withstand test for gas-filled compartments
6.104 Measurements of leakage currents of non-metallic
enclosures
6.105 Weatherproofing test
6.201 Tightness and mechanical strength for liquid filled
compartments
7 Routine tests
7.1 Dielectric tests
7.2 Tests on auxiliary and control circuits
7.3 Measurement of the resistance of the HV main circuit
7.4 Tightness test for the HV functional unit
7.5 Design and visual checks
7.101 Mechanical operation tests on HV functional unit
7.102 Pressure tests of gas-filled compartments
7.103 Tests of auxiliary electrical, pneumatic and hydraulic
devices
7.201 Measurement of the resistance of the windings
7.202 Measurement of the voltage ratio
7.203 Measurement of the short circuit impedance and load
losses
7.204 Measurement of no-load losses and current
7.301 Inspection of the LV functional unit, including
inspection of wiring and, if necessary, electrical
operation test
7.302 Checking of protective measures and of the electrical
continuity of the protective circuits the LV
functional unit
8 Guide to the selection of CEADS for service
8.1 Selection of rated values
8.2 Selection of Internal Arc Classification
8.3 Information
9 Information to be given with enquiries, tenders and
orders
9.1 Information with enquiries and orders
9.2 Information with tenders
10 Rules for transport, installation, operation and
maintenance
10.1 Conditions during transport, storage and
installation
10.2 Installation
10.3 Operation
10.4 Maintenance
10.5 Dismantling, recycling and disposal at the end of
service life
11 Safety
11.1 Electrical aspects
11.2 Mechanical aspects
11.3 Thermal aspects
11.4 Internal arc aspects
12 Influence of the product on the environment
Annex A (normative) - Method for testing CEADS under
conditions of arcing due to an internal fault
A.1 General
A.2 Internal arc classification
A.3 Selection of tests
A.4 Test arrangements
A.5 Point of initiation of arc
A.6 Current and voltage applied
A.7 Test procedure
A.8 Acceptance criteria
A.9 Test report
A.10 Designation of the internal arc classification
Annex B (normative) - Test to verify the sound level
of a CEADS
B.1 Purpose
B.2 Test specimen
B.3 Test method
B.4 Measurements
B.5 Presentation and calculation of the results
Annex C (informative) - Explanation on CEADS
C.1 Background
C.2 Type of CEADS
C.3 Installation of a HV/LV substation
Bibliography