Graeme we had a SWER on Banks Peninsula which I think was the last one of its kind in the Canterbury region. It was replaced some years ago. I don't know if its a joke but I heard that Telecom subsidised the replacement.
Surinenam, your figures of 20 HP motors , running at 36A FLA, and a PF of 0.5 doesn't sound right. What kind of motors are they ? Why do you have to double the size of the transformer ? Are those motors an addition ?
All the replies in this thread are valuable here. I think Digitrex raises...
Sorry Wareagle I was having a pedantic laugh there. A 1.0 P.F. is theoretically impossible and we call it "unity" ( is it called unity in The States ? ). You're absolutely right about adding caps until the desired PF is achieved. What PF is required by your PoCo's. Most of ours require...
Wxashcra was the 2250 kVAr correction bank on the 12.5 kV supply installed because the 480 V correction wasn't working ?
Now in New Zealand the power companies are scaling back their power factor correction efforts and requiring the user to correct their own power.
Wareagle if you have a...
Thats right Powerfulstuff, I never thought of that. If the Power Distribution Company certifies the supply to the transfer switch then they must have line diagrams of the Earth & Neutral arrangements they require. I'll try get my hands on those drawings then. I'll let you know how it goes.
So the Square-D breaker with shunt trip is cheaper than the Square-D breaker without shunt trip ?
Surely not. Sounds like you are getting a bargain.
What does NOS mean ?
Thanks for your replies guys.
WattoUK. If the emergency generator neutral and earth are connected to the Main Switchboard Earth. Could this pose a problem if the generator is started ( maintenance test ) while the mains supply is still available. If the generator neutral isn't switched and...
Hi I live in New Zealand, I'm new to "eng-tips" and I have a sticky question:
If a hospital main switchboard has an emergency generator transfer switch. Should the transfer switch break the Neutral on the generator side ? And what should the earthing/grounding arrangements for the generator...
