Northeast Power Systems

TRANSFORMER SURGE PROTECTION - RC SNUBBERS

TRANSFORMER SURGE PROTECTION - RC SNUBBERS

NEPSI's RC Snubbers protect medium-voltage transformer primary windings from high frequency voltage transients.Key applications requiring RC Snubber protection include:

• Medium voltage transformers switched with primary side vacuum or SF6 circuit breakers.
• Transformers that are fed with short feeder cables or short bus duct runs.
• Dry-type and cast-coil-type transformers and some liquid-filled transformers.

PRODUCT SCOPE

• Operating Voltage: 2.4kV through 34.5kV (38kV Max)
• Impulse Withstand Voltage: 60kV BIL - 200kV BIL
• Surge Capacitance Rating (μF): 0.125, 0.25, 0.5, 1, or as specified
• Surge Resistance Rating: 30 Ohms to 200 Ohms, 1kW/Phase
• Phase-to-Phase and Phase-to-Ground MOV’s (lightning arresters) rated for your application to 48kV Duty Rating; Heavy Duty Distribution Class or Station Class
• Integral protection, control, and monitoring systems
• Integral air-disconnect /ground switch
• Metal-Enclosed Design: NEMA 1, 3R, 4X, 12 | IEC IP10, IP14, IP56, IP52
• Comes fully assembled, tested, and ready for interconnection

BENEFITS

• Protect against inter-turn insulation failure
• Extend transformer life
• Reduce the likelihood of circuit breaker pre-strike, re-strike, and re-ignition
• Reduce the magnitude and rate-of-rise of voltage transients
• Dampen resonant transients
• Reduce production downtime due to insulation failures
• Easy installation