Leakage
'Leakage' is the amount of current that flows from the line to the chassis or the chassis to 'Edison' ground, hence the safety regulations in place to limit this. Leakage Current is measured in micro-Amps, or .000001 Amps, a VERY small amount. 100uA = .1mA or .0001A.
ETL / UL / CE regulations require we meet between 500uA and 3500uA leakage in order to sell our products to the public. These numbers are for a NEW consumer or commercial treadmill. Hospital or Medical requirements are much lower than for the general public, typically between 300uA and 500uA. Cybex treadmills are not specified or designed for medical applications. However, a lot of our equipment finds its way there. These locations are audited for leakage on a regular basis.
Newer treadmills are very close to or can already pass the Medical Leakage requirement. If not, or to ensure they do, an electrician can install an isolation transformer (see list below).
To lower leakage on an older treadmill, like the Trotter 575 or any treadmill that originally passed Leakage and was installed in a medical application, first replace the drive motor and the line filter. The reason leakage would go UP in any treadmill is due to accumulated brush dust in the motor and / or failure of capacitors in the line filter. If that doesn't solve the problem, we can suggest they buy an isolation transformer. Have them contact an electrician with this information:
Approved Isolation Transformers
They can also find their own
'Leakage' is the amount of current that flows from the line to the chassis or the chassis to 'Edison' ground, hence the safety regulations in place to limit this. Leakage Current is measured in micro-Amps, or .000001 Amps, a VERY small amount. 100uA = .1mA or .0001A.
ETL / UL / CE regulations require we meet between 500uA and 3500uA leakage in order to sell our products to the public. These numbers are for a NEW consumer or commercial treadmill. Hospital or Medical requirements are much lower than for the general public, typically between 300uA and 500uA. Cybex treadmills are not specified or designed for medical applications. However, a lot of our equipment finds its way there. These locations are audited for leakage on a regular basis.
Newer treadmills are very close to or can already pass the Medical Leakage requirement. If not, or to ensure they do, an electrician can install an isolation transformer (see list below).
To lower leakage on an older treadmill, like the Trotter 575 or any treadmill that originally passed Leakage and was installed in a medical application, first replace the drive motor and the line filter. The reason leakage would go UP in any treadmill is due to accumulated brush dust in the motor and / or failure of capacitors in the line filter. If that doesn't solve the problem, we can suggest they buy an isolation transformer. Have them contact an electrician with this information:
Approved Isolation Transformers
- Square-D Part Number 3S6FIS (~60lbs.) http://www.squared.com/
- MCI Xfrmr Corporation, Orange, MA Part Number 2-51-9354 (weight and cost unknown) http://www.mcitransformer.com/
- TSI Power Part number ILc-2400-520 (120 VAC in put & output) Input cord is 6’ with a NEMA 5-20P (20A / 120v) plug. Has NEMA 5-20R (20A / 120v) outlet on the back for our equipment to plug in. Roughly $1200 as of 2009. Contact www.tsipower.com or 800-874-3160 (WI)
- Syratec part number DLCPlus ISO #DLC2400 . This unit is also ‘plug and play’ for 120v treadmills and sells for roughly $725 as of 2009. Contact www.syratec.com or 866-797-2832 x814
They can also find their own
Auto or Isolation Transformer
Rated 2.4KVA minimum @ 115v/20A or 208/12A
Rated 2.4KVA minimum @ 115v/20A or 208/12A