MH4 Arrester (355 kV Rated, 12828 mm Creep Distance, AA Hardware)
Brand: OHIO BRASS
Catalog ID: MH4550BM444AA
IEC Station High / Porcelain Housed Surge Arrester
IEC Porcelain station class arresters for substation protection
- IEC porcelain Station High class arrester
- IEEE 693 High Performance Qualification
- High quality MOV discs made in Wadsworth, Ohio since 1978
- Arresters assembled in Aiken, South Carolina
- 100% routine tested
General
Application
Substation
Catalog Number
MH4550BM444AA
Color
Brown Housing
Material
Porcelain Housing
Mounting Position
Upright
Type
Station
Dimensions
Bolt Circle Diameter
254 mm
Diameter - Single Bolt Hole(s)
14 mm
Height
4715 mm
Minimum Mounting Spacing on Center (Sea Level) - Phase to
103.4 in (2627 mm)
Minimum Mounting Spacing on Center (Sea Level)- Phase to Phase
117.6 in (2986 mm)
Electrical Ratings
Creep and Leakage Distance
505 in (12828 mm)
Duty Cycle
444 kV
Frequency Rating
48-62 Hz
Maximum Discharge Voltage
- 923 kV @ 1.5 kA
- 959 kV @ 3 kA
- 992 kV @ 5 kA
- 1042 kV @ 10 kA
- 1115 kV @ 20 kA
- 1228 kV @ 40 kA
Maximum Switching Surge Protective Level @ 1000A
890 kV
Maximum Switching Surge Protective Level @ 2000A
923 kV
Maximum Switching Surge Protective Level @ 500A
865 kV
MCOV
355.2 kV
Minimum Strike
3760 mm
Pressure Relief Capability-Symmetrical rms (kA)
63
Voltage - Line
550 kV
Withstand Voltage - 60 Hz Wet
1176 kV
Withstand Voltage - Lightning Impulse
2036 kV
Withstand Voltage - Switching Impulse
1872 kV
Conductor Related
Conductor Type
Cu/Al (AWG #4 - 500 MCM)
Certifications And Compliance
Industry Standard(s)
IEC
Configuration
Mounting Position
Upright