GUIDE FOR SYNTHETIC FAULT TESTING OF AC HIGH VOLTAGE CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS
Institute of Electrical & Electronics Engineers
1 Introduction
1.1 General
1.2 Scope and purpose
2 Definitions
3 References
4 Short circuit current interruption process
4.1 Circuit breaker performance during interruption;
basic intervals
4.2 State of interrupting process
5 Basic principles of synthetic test
5.1 Principles
5.2 Basic components
6 Synthetic test circuits
6.1 Current injection method
6.2 Voltage injection method
6.3 Duplicate circuit method
6.4 Synthetic test circuits; choice of methods
7 Requirements for synthetic test methods
7.1 High current interval
7.2 Interaction interval
7.3 High voltage interval
7.4 Discussion
8 Parameters, test procedures, and tolerances
8.1 High current interval; voltage of current circuit
8.2 Interaction interval - current injection circuit
8.3 High voltage circuit
9 Short line fault
10 Multiple loops
10.1 Method with single application of the voltage
circuit
10.2 Method with multiple application of voltage
circuits
11 Circuit breakers equipped with parallel impedance
11.1 General
11.2 Four part test method
12 Duty cycle
12.1 Test duties for synthetic testing
12.2 Test methods
13 Test records
13.1 General
13.2 Current measurements
13.3 Voltage measurements
Figures
1 Three basic intervals of interrupting process
2 Parallel current injection test circuit
3 Parallel current injection - current waveshape
4 Series current injection test circuit
5 Series current injection current waveshapes
6 Voltage injection test circuit
7 Voltage injection; voltage waveshapes
8 Duplicate circuit test arrangement
9 Effect of arc voltage on current waveform
10 Power frequency recovery voltage
Table
1 Duty cycles for synthetic testing
Appendix
A Distorted current; derivation
A1 Introduction
A2 Derivation
A3 The influence of the distortion current during the
period of arcing
Appendix Figure
A1 Distortion current
Gives basis for synthetic testing of circuit breakers to demonstrate short-circuit current rating on single phase basis.
| Document Type | Standard |
| Status | Current |
| Publisher | Institute of Electrical & Electronics Engineers |
