Surge Arresters 24 to 550kV Polymer Housed Surge Arresters

Overview
Standard YH10WZ, PH3 and PH4 station class arresters are available for use on system voltages from 22.86 kV to 500 kV (24 kV max to 550 kV max). They offer an attractive alternative to porcelain housed arresters (MVN family), without sacrificing any reduction in protective capability or energy handling capability, for cases where the high mechanical strength of porcelain is not required and lower weight would be an advantage. Additionally, the YH10WZ, PH3 and PH4 families (up to 230kV MCOV) meet the requirements for High Seismic Performance per IEEE Standard 693-2018.

Construction:
    "Tube"design, using fiberglass reinforced epoxy tube overmolded with silicone rubber weathershed housing
    Single column of MOV discs and aluminum spacers (as required) centrally located within housing
    Disc column held under high spring compression between ductile iron end fittings affixed to housing
    Directional pressure relief system built integrated into end fittings

At-a-Glance:
    High leakage distance designs (standard designs at least 28% more leakage distance than IEEE C62.11 minimum); higher leakage distance designs available for high pollution areas
    Up to 47% lighter than comparable porcelain arresters
    Resilient polymer housing resistant to mechanical damage
    Tested to 63kA rated short circuit current; can handle reclosures with no concern for housing fragmentation

Technology parameters    

 YH10WZ Electrical Characteristics

Discharge voltages are based on a 500A surge of 45 µs time to crest through 88 kV MCOV and 1,000A surge of 45 µs time through 190 kV MCOV and 2,000A through 448 kV MCOV.

YH10WZ Physical Characteristics