- AA1 Advisory Area for Substations Concepts and Developments
- CAG Customer Advisory Group
- JWG B3/B1.27 Factors for invesment decision GIL vs. Cables for AC Transmission
- JWG B3/C1/C2.14 Circuit Configuration Optimisation
- Reference Book
- SAG Strategic Advisory Group
- SC B3 meeting
- TAG Tutorial Advisory Group
- WG B3.13 Reducing replacement time of HV Equipment
- WG B3.23 Guidelines for uprating and upgrading of substations
- WG B3.24 Benefits of PD diagnosis on GIS condition assessment
- WG B3.29 Field Tests Technology on UHV substation during construction and operation
- WG B3.30 Guide to minimize the use of SF6 during routine testing of electrical equipment
- WG B3.31 Air Insulated Substations design for Severe Climate Condition
- WG B3.32 - Saving through Optimized Maintenance of Air Insulated Substations
- WG B3.34 Expected impact of future grid concept on substation management
- WG B3.35 Substation earthing system design optimisation through the application of quantified risk analysis
- WG B3.36 Special considerations for AC collector systems and substations associated with HVDC connected wind powers plants
- WG B3.37 Internal arc effects in Medium Voltage switchgear (1-52kV)-mitigation techniques
- WG B3.38 Management of risk in Substations
- WG B3.39 Impact of NCIT applications on HV Gas Insulated Switchgear
- WG B3.40 - SF6 Gas Measurement Guide
- WG B3.41 Mobile Substations incorporating HV GIS
- WG B3.42 Reliability analysis and design guidelines for LV AC/DC Auxiliary Systems
- WG B3.43 Low cost substation solutions for Sub-Saharan Africa
WG B3.37 Internal arc effects in Medium Voltage switchgear (1-52kV)-mitigation techniques
The WG has been officially set-up in July 2013, after some preparatory work. It will prepare a Brochure expected to be available in 2017.
Several switchgear assemblies in the market place incorporate internal arc fault limiting devices. These devices generally operate by short-circuiting and hence diverting the fault arc using very fast detection and a fast making switch, generally to earth. The international MV switchgear standard IEC 62271-200 (valid for air-insulated and gas-insulated assemblies) acknowledges such devices as supplementary protective measures, but with little information. This standard also states that in general, arc limiting devices are out of its scope. They are not described or specified and no guidance is given for the related name plating of the switchgear. The IEC sub-committee SC17C requested CIGRÉ to carry out a technical review to give recommendations to support an extension of the current standard to cover such a function and to provide assessment of the same.
1) Review of methods for arc effect mitigation under internal arc fault conditions of medium voltage switchgear assemblies.
2) Mapping of existing technical solutions related to arc effects mitigation: parameters for detection, means for actuation, power supply issues, etc.
3) Review the status of current Standards and existing specifications.
4) Consideration of the benefits and consequences resulting from arc effect mitigation including: limitation of pressure rise in switchgear and switch-rooms (digital simulations are already used for such purpose), limitation of fire risk and other damages, possible reduction of outage duration, transients on the network, etc.
5) Analysis of the possible methods for verification of performance, assessment and the definition of general requirements for standardized type and routine testing.
6) Guidance for the user on relevant selection parameters: personnel safety, downtime, maintainability, environmental impact, investment costs, life time, immunity to EMI etc.