KonradPL
Electrical
- Apr 17, 2023
- 1
Hi,
I am working on a new construction of a power plant.
The main LV switchgear has two sections with a bus coupler and three incomers. Section A has a "normal feeder" A from a MV/LV Transformer and emergency diesel generator feeder, section B has only a "normal feeder" B from a MV/LV Transformer.
No parallel operation is allowed in the switchgear, only while switching between supply A and supply B the bus coupler is creating a parallel configuration for the switching time.
Following the manufacturer's manual the EDG should undergo an on load test once every 4 months, by synchronizing it with the switchgear.
Coming to the question:
IEC 60364-1 has a specification for the grounding of the N point depending of the network.
Could you please help me understand if the point A.1.1 about the grounding in the TN multiple source system applies to my case and the N points of the transformers should not be grounded at the transformers?
Thank you.
I am working on a new construction of a power plant.
The main LV switchgear has two sections with a bus coupler and three incomers. Section A has a "normal feeder" A from a MV/LV Transformer and emergency diesel generator feeder, section B has only a "normal feeder" B from a MV/LV Transformer.
No parallel operation is allowed in the switchgear, only while switching between supply A and supply B the bus coupler is creating a parallel configuration for the switching time.
Following the manufacturer's manual the EDG should undergo an on load test once every 4 months, by synchronizing it with the switchgear.
Coming to the question:
IEC 60364-1 has a specification for the grounding of the N point depending of the network.
Could you please help me understand if the point A.1.1 about the grounding in the TN multiple source system applies to my case and the N points of the transformers should not be grounded at the transformers?
Thank you.