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MH4 Arrester (312 kV Rated, 8954 mm Creep Distance, AA Hardware)

By OHIO BRASS

Catalog ID: MH4420GM312AA

By OHIO BRASS

Catalog ID: MH4420GM312AA

IEC Station High / Class 4 Porcelain Housed Surge Arrester

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Bolt Circle Diameter	254.00 mm
Diameter - Single Bolt Hole(s)	14 mm
Height	3406.9 mm
Minimum Mounting Spacing on Center (Sea Level) - Phase to Ground	72.1 in (1832 mm)
Minimum Mounting Spacing on Center (Sea Level)- Phase to Phase	82.2 in (2088 mm)

Creep and Leakage Distance	352.5 in (8954 mm)
Duty Cycle	312 kV
Frequency Rating	48-62 Hz
MCOV	249.6 kV
Maximum Discharge Voltage	648 kV @ 1.5 kA 674 kV @ 3 kA 697 kV @ 5 kA 732 kV @ 10 kA 784 kV @ 20 kA 863 kV @ 40 kA
Maximum Switching Surge Protective Level @ 1000A	626 kV
Maximum Switching Surge Protective Level @ 2000A	648 kV
Maximum Switching Surge Protective Level @ 500A	608.0 kV
Minimum Strike	2648.0 mm
Pressure Relief Capability-Symmetrical rms (kA)	63
Voltage - Line	420 kV
Withstand Voltage - 60 Hz Wet	800 kV
Withstand Voltage - Lightning Impulse	1459 kV
Withstand Voltage - Switching Impulse	1338 kV

Conductor Type

Cu/Al (AWG #4 - 500 MCM)

Industry Standard(s)

IEC

Hubbell Power Systems Metal Oxide Varistor (VI01022E0718)

Product Details