Hi.
I am currently working with a client, and they want us to make a list of different suppliers of GCBs, both well known and unknown.
Our client wants to investigate what their option is and to what cost - I’ve got some knowledge but since our company always buys ABB og Siemens we are in need...
Yes, i agree. I've also thought it might be for the transients. But however, i dont know how to validate or set the size.
I just discorvered that there is a capacitor today of 0,5nF/phase.
I'm sorry to say that I have very little information about the gen and transformers ratings.
The data...
Scottf:
Yes the relay has a very low burden, but do I need to size the VT bigger if there's a "primary resistance" connected to the generator neutral, and a VT in parallell over the resistance?
The resistance is sized to lower the fault current to 10A.
I'm talking about a VT for generator neutral protection purpose yes. The ratio of the VT is 11 000:v3 / 110:3, but the size in VA I dont know what to consider. Cant find any litterature mentioning this
Thank bacon4life.
As I understand, the capacitance is usually equal to the stator windings capacitance of the generator - but when this value is unknown. Then how to determind the value?
In a generator circuit, with a step up transformer - what exactly is the purpose of the surge capacitor and how to calculate the size? Picture of simplified circuit. The generatorors both are equipped with GCB and disconnectors.
