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HV Surge Arresters upto 245 kV
HV Surge Arrester upto 216kV for substation protection from lightening and switching overvoltages. Bowthorpe EMP pioneered the development of polymeric composite housed surge arresters in early 1980’s and since 1986, has a proven service experience across the globe, operating in world’s toughest environments. Bowthorpe surge arresters provide active over-voltage protection, reducing system outages and protecting expensive terminal equipment.
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LV Surge Arresters upto 440 V
LV Surge Arrester upto 440V for substation protection from lightening and switching overvoltages. LV Surge Arresters provide protection for low-voltage overhead lines, consumer in-house supplies, distribution transformers and other systems. Numerous tests have confirmed durability of the housing, even when exposed to extreme temperature fluctuations and contamination
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MV Surge Arresters upto 36 kV
MV Surge Arrester upto 45kV for substation protection from lightening and switching over voltages. In past 15 years, almost all high-voltage networks used MO arresters. However, in medium-voltage networks, a substantial number of conventional gapped arresters (SiC resistors and series spark gaps) were installed until a few years ago. Today MO (Metal-Oxide) arresters without spark gaps have gained popularity. Networks require improved protection level and better performance in polluted environments. The switch to polymeric housings made it possible to do without the previously necessary spark gaps. Polymeric housings are reliable against ingress of moisture and provide minimal risk of failures (violent shattering of the housing). MVSA are manufactured using high quality MOV blocks which display excellent thermal and current handling characteristics due to guaranteed homogeneity of the varistor volume. In the wrap design surge arresters, the MOV blocks are wrapped with fiberglass ribbons impregnated with epoxy resin to create stacks of MOV blocks.
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Transmission Line Surge Arresters upto 400kV
Transmission Line Surge Arrester (NGLA) upto 400kV, Power supply utilities have verified load losses due to voltage snags on their systems from transitory outages caused by lightning activity and causing permanent damages. The effect of these transitory disturbances on transmission lines are more critical in areas with high ground resistivity when associated with high lightning activity. Most non-scheduled outages are transitory in nature, with a fault time shorter than 1 minute, yet deemed to be unacceptable by power supply utilities. The loss of supply is critical for all modern industries reliant on sophisticated electronic equipment and production processes sensitive to momentary disturbances to the system. Raychem RPG’s Transmission Line Surge Arresters (TLA) provides reliability to the power system by reducing non-schedule outages caused by lightening.