Isolation Transformers for Sound and Lighting Systems
Reduce electrical noise on your AV system with a dedicated isolation transformer!
Why audio systems need an AC Isolation Transformer
Audio systems are especially susceptible to electrical noise.
Motor controls and light dimming systems generate considerable noise because they use SCR and Triac control.Those solid-state switching systems create fast-rise transients that reflect back on the same power company line that feeds the audio system.This high frequency trash causes hum and buzz problems.
The most widely used and cost effective method to isolate the sound system from high-frequency transients is an AC isolation transformer. The electrostatic (Faraday) shield of an isolation transformer greatly reduces the inter-winding capacitance. With lower capacitance the coupling from the primary (power company) to the secondary (audio system power) attenuates the noise.
Poor grounding causes hum problems. Long ground lines act as antennas for interference, both RFI (Radio Frequency Interference) and EMI (Electro Magnetic Interference).
An isolation transformer, next to the power panel provides a short, low-impedance ground reference. The isolated secondary re-references the ground at the transformer output, typically a few feet from the power panel and audio equipment racks, not several hundred feet away where power enters the building.
Features built into the NLP Isolation Transformer line include:
- Built by industry leader Square D.
- Available with aluminum or copper windings.
- K-13 rated.
- Electrostatic shield standard.
- Reduced core flux to compensate for harmonic voltage distortion.
- Double size neutral terminals to reduce heating.
- Additional winding capacity to compensate for higher non-linear load loss.
- Heavy gauge ventilated indoor enclosures.
- cULus listed.
- Available in 15, 30, 45, 75, 112.5, or 150 kVA ratings.
- 480 Delta - 208Y/120 or 208 Delta – 208Y/120
Transformer Sizing Guide
Copper
208 Delta Primary - 208Y/120V Secondary
NLPC-15-208-208 ......... 15 kVA, 208v primary - 208Y secondary Download PDF
NLPC-30-208-208 ......... 30 kVA, 208v primary - 208Y secondary Download PDF
NLPC-45-208-208 ......... 45 kVA, 208v primary - 208Y secondary Download PDF
NLPC-75-208-208 ......... 75 kVA, 208v primary - 208Y secondary Download PDF
NLPC-112-208-208 ....... 112 kVA, 208v primary - 208Y secondary Download PDF
NLPC-150-208-208 ....... 150 kVA, 208v primary - 208Y secondary Download PDF
480 Delta Primary - 208Y/120V Secondary
NLPC-15-480-208.......... 15 kVA, 480v primary - 208Y secondary Download PDF
NLPC-30-480-208.......... 30 kVA, 480v primary - 208Y secondary Download PDF
NLPC-45-480-208.......... 45 kVA, 480v primary - 208Y secondary Download PDF
NLPC-75-480-208.......... 75 kVA, 480v primary - 208Y secondary Download PDF
NLPC-112-480-208........ 112 kVA, 480v primary - 208Y secondary Download PDF
NLPC-150-480-208........ 150 kVA, 480v primary - 208Y secondary Download PDF
Aluminum
208 Delta Primary - 208Y/120V Secondary
NLPA-15-208-208.......... 15 kVA, 208v primary - 208Y secondary Download PDF
NLPA-30-208-208.......... 30 kVA, 208v primary - 208Y secondary Download PDF
NLPA-45-208-208.......... 45 kVA, 208v primary - 208Y secondary Download PDF
NLPA-75-208-208.......... 75 kVA, 208v primary - 208Y secondary Download PDF
NLPA-112-208-208........ 112 kVA, 208v primary - 208Y secondary Download PDF
NLPA-150-208-208........ 150 kVA, 208v primary - 208Y secondary Download PDF
480 Delta Primary - 208Y/120V Secondary
NLPA-15-480-208.......... 15 kVA, 480v primary - 208Y secondary Download PDF
NLPA-30-480-208.......... 30 kVA, 480v primary - 208Y secondary Download PDF
NLPA-45-480-208.......... 45 kVA, 480v primary - 208Y secondary Download PDF
NLPA-75-480-208.......... 75 kVA, 480v primary - 208Y secondary Download PDF
NLPA-112-480-208........ 112 kVA, 480v primary - 208Y secondary Download PDF
NLPA-150-480-208........ 150 kVA, 480v primary - 208Y secondary Download PDF
-
Integrated Power Center - Single Cabinet Solution See the IPC at a glance - an elegant way to package a very common panelboard(s) + transformer design.
