Does anyone know if there is a manufacturer in the US for the pad mounted ground detection equipment specified in the attached drawing. I could give this to a switchboard manufacturer but was hoping this was a standard product for somebody. Thank you in advance.
A local solar contractor (really nice guy)has installed a 15KW PV system on the property of a multi-millon dollar home. There has been some type of dispute and the owner is requesting an engineer to inspect the system for compliance to 2005 NEC.
The inverter output circuit connects to an 80...
I have been asked to investigate two cases where a 3MW generator circuit breaker has tripped on loss of excitation and reverse power when the connected UPS is placed in bypass. The UPS load is 2MW and the loads are PDU's for a server farm. When the system is operating normally the PF is .95...
Does anyone have any experience, good or bad, with 'Electroflow Power Conditioners'. The claim is they reduce energy costs, system losses and harmoics and improve PF. They have been applied in plant that has 50% of the motor load controlled by VFD.
The plant load is 4.1MW and 1.4MVAR. There...
The System:
The substation at the facility has a 66KV to 4.16KV, Delta-Wye transformer, 5%Z with a 6 ohm resistor grounding the neutral on the 4.16KV side. The main OCD in the plantis a fused air switch rated 1,200 amp cont. and 1,200 amp interrupting. The neutal resistor has a 400:5 CT in...
