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IEEE Std 1623-2020 pdf free download

IEEE Std 1623-2020 pdf free download.IEEE Guide for the Functional Specification of Medium Voltage (1kV to 35kV) Electronic Shunt Devices for Dynamic Voltage Compensation.
6.7 Enclosures
The device system shall be housed in enclosures appropriate to the application.
For outdoor pad-mounted installations, all device system components should be enclosed in an electrically grounded weatherproof enclosure with provisions for securely anchoring the enclosure to the foundation.
For outdoor overhead installation, all device system components shall be housed in electrically grounded rain- tight enclosures (NEMA 3R) designed for ease of installation and maintenance access from standard utility overhead line service equipment.
For indoor installation, all device system components shall be housed in electrically grounded metal enclosures designed to help ensure that the opening of a door exposes no live parts. A dust proof enclosure (NEMA 12) is recommended for indoor installation.
Energy storage in excess of 139 Wh usable capacitive energy storage, or rectifier connected to ac supply, if appropriate, should be in a suitable separate enclosure with mechanical and electrical interlocks provided to maintain a proper and safe operating sequence.
Titransportable device modules are mounted on a trailer, the trailer dimension should not exceed in most cases 2.6 m (8.5 fl) in width. 14.6 m (48 ft) in length. and 4.5 ni (14.8 fI) in height. Otherwise, special oversize load permits may be required for transporting the unit.
The supplier should furnish shipping weights and dimensions of each individual separately shipped module. The supplier should furnish detailed foundation requirements (drawings) showing all tie down points, pier foundation location and load bearing requirements. and ground pads.
6.8 Reliability, availability, and maintenance
Design availability of an individual module should exceed 98% for forced outages and should exceed 99.5% for scheduled outages, after the commissioning period.
Design availability factor for forced outages of devices consisting of multiple modules (including provisions for dc-rating) should exceed 95% after the commissioning period.
Scheduled maintenance that requires that the unit be taken out of service should not exceed 8 h per year. on average, for a 20-year minimum design lifetime.
Replacement of any power electronics assembly should be capable of being accomplished in 2 h or less. with parts available on site.
The device should be able to withstand the loss of one cooling fan or pump with no degradation in nominal output capability.
The device should be capable of operation in high isokeraunic areas (80 or more thunderstorm days per year). The device should be capable of restoring voltage for multiple (not less than five) sequential maximum duration, maximum depth sags at s intervals if required by the user.
The supplier should provide a recommended list of spare parts consistent with desired reliability performance.IEEE Std 1623-2020 pdf free download.

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