Thanks for the replys.
The cables are about 40 meters long. They are going to dig into the hill and embed some pipelines underneath. During the construction time (about a year), the cable ducts will have to be left on the ground,while they were originally designed underground.
Yes.The duct...
Hi there,
There are a set of cables in PVC ducts with concrete casing running underground up to a hill. A field work is going on to dig into the soil underneath the cable ducts and move the soil out. Eventually, the cable ducts will be exposed to air but somehow supported above ground.
As I...
I'm looking at sizing of conductors/cables. My questions are: when you choose single conductor cable and when you are supposed to use three conductor cables? From CEC code Table 1 which is the allowable ampacities for single copper condctors and Table 2: the allowable ampacities for not more...
Thanks all for your reply. Those clarified the issue pretty well.
Seems like a VFD control is a effective but expensive solution. Suppose I don't use either VFD or soft starter, what would be the inrush current at the time I switch from low speed to high speed? Would that be the same as I start...
Hi,
A question regarding the soft starter and VFD on a intake gate hoist. Hope to get your help.
The hoist is of 3hp and 25hp at low and high speed respectively. When the hoist starts directly at high speed, there could be voltage drops. so I'm seeking the solution of a soft starter.On the...
