This Part applies to transfer switching equipment (TSE) to be used in power systems with interruption of the supply to the load during transfer, the rated voltage of which does not exceed 1000V a.c. or 1500V d.c.
It covers:
——Manually operated switching equipment (MTSE);
——Remotely operated transfer switching equipment(RTSE);
——Automatic transfer switching equipment (ATSE).
It covers TSE provided with or without an enclosure.
Devices necessary for the control (e.g. control switches, etc.) and the protection (e.g. circuit-breakers, etc.) of a TSE shall comply with the relevant national standards.
TSE used only for emergency lighting may be subject to specific rules and/or legal requirements and are not, therefore, covered by this standard.
The object of this Part is to state:
1) The characteristics of the equipment:
a) specific ) ) TSE;
b) TSE the main part ) of which is covered by other GB 14048 product standards.
2) The conditions of the equipment with respect to:
a) operation for which the equipment is intended;
b) operation and behaviour in case of specified abnormal conditions, for example, short-circuit;
c) dielectric properties.
3) The tests intended to confirm that these conditions have been met and the methods for
4) The data to be marked on the equipment and provided by the manufacturer.
Forward I
1 Scope and Object
2 Normative References
3 Terms, Definitions, Symbols and Abbrviations
4 Classification
5 Characteristics
6 Product Information
7 Normal Service, Mounting and Transport Conditions
8 Constructional and Performance Requirements
9 Tests
Appendix A (Normative) Assignment of Utilization Categories Based on Results of Tests
Appendix B (Informative) Items Subject to Agreement between Manufacturer and User
Appendix C (Informative) Differences between This Part and IEC 60947-6-1: 2005 (Edition 2.0) and Relevant Causes
Figure 1 Test Circuit for Connection to Normal and Alternative Supplies
Figure 2 Test Circuit for the Verification of Making and Breaking Capacities on Three Poles
Figure 3 Test Circuit for the Verification of Making and Breaking Capacities on Two Poles
Table 1 Utilization Categories
Table 2 Verification of Making and Breaking Capacity – Conditions for Making and Breaking Corresponding to the Utilization Categories
Table 3 Verification of Operational Performance – Conditions for Making and Breaking Corresponding to the Utilization Categories
Table 4 Value of the Test Current for the Verification of the Ability to Operate under Short-Circuit Conditions
Table 5 Acceptance Criteria
Table 6 List of Type Tests (Overall Scheme of Test Sequences)
Table 7 List of Type Tests (Referred to by Their Clause Numbers) to Which a Given Derived TSE Shall Be Submitted
Table 8 Number and Duration of Operating Cycles for the Making and Breaking Capacity Test
Table 9 Number and Duration of Operating Cycles for the Electrical and Mechanical Operational Performance Tests for Operation A Utilization Categories
Table 10 Number and Duration of Operating Cycles for the Electrical and Mechanical Operational Performance Tests for Operation B Utilization Categories
