Vicor Mini MegaPAC AC-DC Switcher - Manual (Page 25)

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 25
Low Leakage Version
If Low Leakage is required, the MegaPAC family of power supplies has a model
variant (must be requested). This model enables the user to meet various additional
specifications. Presently, the PFC MegaPAC, Mini MegaPAC and Autoranging MegaPAC
are available in Low Leakage versions. Other models can be made available.
The MegaPAC family of power supplies consist of:
n PFC MegaPAC
n PFC MegaPAC-High Power
n PFC MegaPAC-EL (Low Noise)
n Mini MegaPAC
n Autoranging MegaPAC
n 4 kW MegaPAC
n 4 kW MegaPAC-EL (Low Noise)
The advantage of the Low Leakage MegaPAC power supply is in multiple power supply
systems that have one AC input. This option will lower the input leakage current for
these products to 500 µA or less. An additional external EMI filter may be required.
How Low Leakage is Obtained
Low Leakage for the MegaPAC Family of power supplies is obtained with the removal of
the "Y" capacitors from within the EMI filter of the MegaPAC as well as the "Y" capacitors
on the input of the ConverterPACs. This reduces the leakage current from the AC input
to AC ground (chassis) to below 500 µA. At the same time, since the "Y" capacitors are a
vital component of the EMI filter, without them, the EMI will go up. When this happens,
the unit may no longer meet Westcor’s published specifications for conducted EMI. In
order to reduce the EMI to within an acceptable limit, an additional external EMI filter
maybe required. All safety agency certifications for the MegaPAC power supplies remain
intact. Contact Applications Engineering for more information.
Westcor currently has the following ConverterPACs (see ConverterPAC information
sheet and/or User Guide for more information):
VI-200/VI-J00 Maxi/Mini/Micro Other
ModuPAC (M) FinPAC (PZ) FlexPAC (FSS)
JuniorPAC (J) UniPAC (XU)
DualPAC (D) QPAC (XQ)
RamPAC (R) FinQPAC (PZL)
BatPAC (B)
QPAC (L)
DualQPAC (LD)
Junior QPAC (LJ)
Please note: The MegaPACs (including Low Leakage versions) are not UL2601 or EN60601 compliant .