Cell Site Service Disconnect Switch

Status
Not open for further replies.
B

brantdavid

Member
I recently visited a cellular site. The cellular equipment shelter is powered from a pole mounted utility transformer with 120/240V, single phase 200 amp service. The utility overhead service wiring is run from the transformer overhead to an adjacent pole. There is a service mast on the pole that runs down to the a meter and 200 amp circuit breaker mounted on the pole. The service is then run underground over to the equipment shelter (approximately 75 ft).

Inside the equipment shelter is a non-fusible service disconnect switch. This disconnect switch will be feeding a new Automatic Transfer Switch(ATS). The load side of the ATS will feed a load center with a 200 amp main breaker. The load center will be mounted next to the ATS. The distance from the service disconnect switch to the new ATS is about 8 FT.

My concern is that the existing service disconnect switch inside the shelter is a non-fusible switch. The overcurrent device is located out at the pole.

I would appreciate any comments on this arrangement.
 
Agreed. No issue. One OCPD is enough. Of course, the generator must have its output protected as well.
 
brantdavid said:
My concern is that the existing service disconnect switch inside the shelter is a non-fusible switch. The overcurrent device is located out at the pole.

I would appreciate any comments on this arrangement.
Click to expand...

I would comment that for this kind of application (unattended, high reliability), the less unnecessary protection devices in circuit the better. The addition of another fuse at the disconnect adds no safety, and serves no purpose other than duplicate part of the function of the pole fuse.
 
Status
Not open for further replies.
Top