Porcelain Arresters

765 kV

Our surge arresters with proven glazed porcelain envelope offer exceptional mechanical strength and decades of stable performance in outdoor substations and harsh environments.

Characteristics

Internal uniform heat distribution preserves the sealing system and supports stable long-term mechanical performance.
Hermetic sealing maintained even under fault conditions reaching 180 °C internal temperatures.
1000 kgf cantilever strength with proven cyclic-load endurance for seismic and structural duty.
Complies with IEC 60099-4 and IEEE C62.11.
Housing available in RTV-coated, gray-glazed, or brown-glazed finishes.

Technical

Continuous operating voltage (Uc): selected to match system temporary overvoltage (TOV) profile.
Nominal discharge current (In): 20 kA, 8/20 µs — IEC station-class and IEEE heavy-duty distribution duty.
Short circuit currents up to 63 kA.

Product Applications

Inside the JVS
Porcelain Arrester

Main components of the Porcelain Surge Arrester

JVS porcelain-housed surge arresters pair time-tested glazed porcelain envelopes with high-energy MOV blocks and proven sealing — delivering long-life protection in the most demanding outdoor substations.

Pressure Relief Vent

Pressure-relief diaphragm ensures a safe, controlled failure mode in the event of an internal short-circuit.

Base Flange

Base flange with multi-bolt pattern delivers stable mounting on substation structures and platforms.

Optimised Creepage

Deep, multi-rib shed profile delivers extended creepage distance for reliable insulation performance in heavy-pollution environments.

Voltage Class Range

A complete range of porcelain arresters configured from medium-voltage distribution through UHV transmission — same proven design, scaled to system class.

Time-tested housings.
Decades of dependable defence.