IEEE C57.21 : 2008
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Hardcopy , PDF
22-09-2021
English
01-08-2008
1 Overview
1.1 Scope
1.2 Purpose
2 Normative references
3 Definitions
3.1 Shunt reactor
3.2 Rating of a shunt reactor
3.3 Insulation
3.4 Losses and impedance
3.5 Construction
3.6 Methods of cooling
4 General requirements
4.1 Service conditions
4.2 Effect of air density on flashover voltage
4.3 Frequency
4.4 Effect of altitude on temperature rise
4.5 Electrical properties of insulating oil
4.6 Magnetic characteristics
5 Basis for rating shunt reactors
5.1 kVA ratings
5.2 Terms in which rating is expressed
6 Tests
6.1 General
6.2 Types of tests
7 Losses and impedance
7.1 Total losses
7.2 Impedance
8 Temperature rise
8.1 Life of insulating materials
8.2 Conditions under which temperature limits apply
8.3 Limits of temperature rise for continuous ratings
9 Dielectric tests and insulation levels
9.1 Dielectric tests
9.2 Dielectric tests for line terminals
9.3 Basic lightning-impulse insulation levels and insulation
test levels for neutral terminals
10 Test code
10.1 General
10.2 Resistance measurements
10.3 General dielectric tests
10.4 Losses and impedance
10.5 Temperature-rise tests
10.6 Audible-sound-level test
10.7 Vibration tests on oil-immersed shunt reactors
10.8 Vibration tests on dry-type shunt reactors
10.9 Magnetic characteristic measurements
10.10 Seismic performance verification on oil-immersed and
dry-type shunt reactors
11 Construction for oil-immersed shunt reactors
11.1 Bushings
11.2 Bushing-type current transformers
11.3 Accessories
11.4 Terminal markings
11.5 Oil preservation
11.6 Oil-preservation systems
11.7 Tanks
11.8 Shunt reactor finish
11.9 Other equipment accessories
12 Construction and installation of dry-type shunt reactors
12.1 General description
12.2 Safety
12.3 Magnetic clearances
12.4 Connections
12.5 Installed sound level
12.6 Concrete foundations
12.7 Switching - Circuit breakers
12.8 Protection practices for air-core shunt reactors
Annex A (normative) Specific requirements for dry-type
air-core thyristor-controlled reactors
Annex B (informative) Dielectric stresses imposed on shunt
reactors during switching
Annex C (informative) Dielectric tests including information
on wave shape control
Annex D (informative) Bibliography
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