11.120.360 Supervisory control and data acquisition (SCADA) system.
The SCADA system will telemeter the digital and analog signals previously defined to the WSSC Control Center.
The station signals are to be connected to a remote terminal unit (RTU) in the station which will in turn be connected to either a radio unit at the station if appropriate or to another existing facility which has a radio, through a telephone line.
The WSSC will determine the method of transmission to be used, by performing field tests. The mounting location for the antenna, if radio transmission is to be used, will also be determined by the WSSC by performing field tests.
The WSSC will furnish the following equipment for installation by the contractor:
(a) One NEMA 4X enclosure approximately 24 inches wide by 36 inches high by 16 inches deep housing the remote terminal unit and the radio. The contractor shall install the enclosure and pull wiring to it. Wiring terminations, programming, etc., will be done by the WSSC.
(b) Antenna (Yagi type, 10 dB gain, Scala model TY-900). The antenna shall be mounted on a pole.
(c) Antenna line (Andrew low loss foam dielectric, one-half-inch-diameter transmission line, model LDF4-50). The antenna line shall be run underground and it shall also be run in a two-inch Schedule 80 PVC conduit terminating at the pole 10 feet above finished grade.
The pole is to be furnished by the contractor. Pole shall be noncreosote preservative treated Class I wood pole. Height shall be as determined by field tests. For SCADA pole and antenna mounting details, see Drawing DG-08-07. (Design Guideline DG-08 § 16.8, dated August 2006)