Vicor FlatPAC Family 50 to 600 Watt AC-DC Switchers U-Series - Manual (Page 6)

Installation and Operation Guidelines
Fusing. The FlatPAC’s internal fuses are not user-replaceable. Please return the
unit to vendor if servicing is necessary.
Grounding. To satisfy IEC 950 Class I grounding requirements, connect a ground
lead to the terminal marked (GND). For one-up FlatPAC models (max. output
200 W), use 1.5 mm 2 / #16 AWG wire; for two-up and three-up models (max. output
400 W and 600 W), use 2.5 mm 2 / #14 AWG wire.
Input Voltage Connections. Connect the line voltage to L1 (hot) and L2N (neutral).
For one-up FlatPAC models (max. output 200 W), use #16 AWG input wire; for two-
up and three-up models (max. output 400 W and 600 W), use #14 AWG input wire.
Recommended connector screw torque is 5 to 7 in-lbs (0.5 to 0.8 N-m).
Recommended strip length is 8 mm. Use your FlatPAC model only with the
correspond ing input voltages and frequencies shown in the table below.
Model 90 –132 Vac 180 – 264 Vac
C– Grade VI–
■ ■
U– C
■ ■
47– 63 Hz 47– 63 Hz
I– Grade VI–
■ ■
U– I
■ ■
47– 440 Hz 47– 440 Hz
Output Wire Gauge. Use the output wire gauge that corre sponds to the output
current of your FlatPAC unit, below: Do not loosen bottom nut.
100 A–160 A : #2 AWG 30 A–50 A : #8 AWG 10 A–15 A : #14 AWG
75 A–100 A : #4 AWG 20 A–30 A : #10 AWG 6 A–10 A : #16 AWG
50 A–75 A : #6 AWG 15 A–20 A : #12 AWG 0 A–6 A : #18 AWG
Output Voltage Trimming. Do not trim the outputs higher than 110% of their
nominal output voltage. When an output is trimmed up, do not exceed its maximum
rated output power.
Operating Temperature. Do not allow the FlatPAC to exceed its maximum
operating temperature, which is reached when the heat sink is 85°C. (Full power can
be delivered up to this temperature.) Heat sink temperature is a function of the
output power and voltage of the supply, ambient temperature, and airflow across the
heat sink. Refer to the Vicor Applica tions Manual to determine the maximum ambient
temperature for your application. Always use worst-case conditions when
calculating operating temperature. Note 1: To ensure proper heat transfer from the
internal module(s) to the heat sink, the mounting holes through the heat sink (2, 3,
and 4 holes on one-, two-, and three-up models, respectively) must contain torqued
screws at all times during operation, whether or not the unit is mounted. If the unit is
operated unmounted, insert a #6 or metric panhead screw through each hole from
below and secure with a nut on top, torqued to 6 in-lbs (0.7 N-m). Note 2: All
FlatPAC models are available with a conduction cooled flat plate instead of the top
heat sink. Contact factory for outline drawings.
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