SE Digest 178

Power Factor Correction

Power Quality Improvement Solutions

Class 3030

www.se.com/us

VarSet Detuned Capacitor Banks

The VarSet Detuned automatic capacitor banks provide power factor correction in electrical distribution networks with moderate levels of harmonic content. The series capacitor and reactor combination is tuned below the first dominant harmonic order (usually the 5th). This prevents resonance and harmonic amplification.

Rebranded

Table 4.43: General Characteristics VarSet Detuned Capacitor Banks Electrical Characteristics Rated voltage ( Un ) / Frequency

480V / 60Hz

Capacitance Tolerance

-5%+10%

Connection type

Three-phase < 6 W per kvar

Power losses

Maximum permissible over current Maximum permissible over voltage

1.3x In

1.1 x Un, 8h per 24h

Enclosure Degree of protection

NEMA1

Color

RAL 7035 (VLV model ) or ASA 49 ( AV/BV Model )

Controller VarPlus Logic

VarPlus Logic controller with embedded Modbus communication

VLVAF4P

Head Protection Without incoming circuit breaker

Lug connection LV PFC Bank must be protected by a circuit breaker or by a fused disconnector on upstream switchboard

AV6000

With incoming circuit breaker

PowerPact with rotary handle

Step

Environment • Installation: Indoor • Ambient temperature: 15 °F to 104 °F (-10 °C to 40 °C) • Humidity: Up to 95% • Maximum altitude: 6500 feet (2000 m) Standards • CSA 22.2 No. 190 • UL810, UL508a Environmental Certifications • Produced in 14001 certified plants, product environmental profile available

Varplus Can 575 V for network voltage 480 V Maximum overcurrent 1.8 xIn 3 ph overpressure disconnection system Discharge resistor 50 V - 1 mn

Capacitors

Dedicated to capacitor switching VarplusDR Overheating protection by thermostat

Contactors

Detuned reactor

Circuit breaker protection Temperature Control Double control Communication ModBus Installation Customer connection Auxiliary transformer

PowerPact

By thermostat and by controller

RS485

TopEntry

120 V included, no need of additional supply

5 VA - secondary 1 or 5 A To be installed upstream of the load and capacitor bank

CT not included (see Current Transformer Selection, page4-40)

CONTROL

GenSet contact Alarm contact

Available for disconnection with generator Available for remote warning signal

4 POWER MONITORING AND

Options available by request: • Fixed stages (by controller programming) • Custom staging ratios • Other voltages and frequencies • Outdoor arrangement - Built to NEMA 3R (AV/BV models only) • Bottom cable entry to main lugs (AV models only) • Bottom cable entry to main breaker (BV models only)

4-37

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