Surge Protection Capacitors / Surge Suppression Capacitors / RC Or CR

Every electrical installation has power transformers, dry type transformers and HV motors. There is common phenomenon of insulation failure due to switching transients due to vacuum circuit breakers and other switchgears. Multiple switching and re-striking (re-ignitions) of vacuum breakers huge losses are incurred due to insulation failure.

Surge capacitors are used in parallel with HV motors and transformers, eliminating the current chopping, voltage escalation, repetitive pre-ignition and virtual current chopping. Re-striking causing high frequency oscillating current through the breaker will be reduced from hundreds of kHz to few kHz by adding surge capacitor in circuit.

• Elimination of inter-turn insulation failure
• Extends the life of equipment insulation
• Elimination of multiple re-striking and pre-striking transients associated with vacuum breakers and other switchgears
• Protection of arc furnace transformer due to multiple switching of breakers

Marxelec Surge capacitors / RC Surge suppressors are designed with latest technology and manufactured in clean environment as per international cleanliness standards. Raw materials are sourced from reputed overseas and genuine manufacturers.
Key Features of Marxelec Surge Capacitors:

• Low loss and low inductance design
• High surge current handling capacity
• Longer service life and high reliability
• Leak-free termination for maximum safety
• Environment-friendly construction
• Compliance with international standards
• Capacitor dielectric is bi-axially oriented hazy film (BOPP), electrode is pure aluminum foil having purity 99% and above and oil is NPCB (All film or APP dielectric).
• Series Resistors are designed to withstand high surge voltage, and wattage is also decided by considering peak discharge current and rated current of capacitor. Also the resistors are low inductance type and combination of multiple parallels.

• High frequency transient over voltage surge suppression
• Protection of HT motors, transformers, switchgears and generators from steep wave-front, short rise time, high magnitude spikes, surges and other transient voltages due to switching and lightning
• Surface mining industries (iron ore, copper, coal, others)
• Chemical industry
• Induction and arc furnaces