Insulation & Shielding

INSULATION SYSTEMS
POWERTRONIX Toroidal Transformers are constructed with reinforced insulation and withstand 4,000 V RMS for 1 minute. Minimum creepage distance is 8 mm.

STATIC SHIELDING
 When the toroidal transformer is used in an extremely noisy environment, a static shield might be needed to reduce the capacitive coupling between the primary and secondary. The noise suppression decreases with larger core sizes.

The static shield consists of copperfoil laminated between polyester tape.
Since the shield adds layers to the winding window in the transformer,
a larger core size might be required.

LOW MAGNETIC STRAY FIELD
POWERTRONIX toroidals have a very low magnetic strayfield, with the primary and
secondary windings uniformly wound around the entire core. For extremely sensitive
applications the radiated field can be reduced further by winding a magnetic shield
around the circumferenceof the transformer.

A - Without magnetic shield
B - With magnetic shield

Powertronix  .  1120 Chess Drive, Foster City, CA 94404
Tel:  (650) 345-6800  .  Fax: (650) 345-7240