12
1-800-735-6200
Off-Line
Front Ends
Single or Three Phase
Strappable
Features
■
250W, 500W, 750W, 115/230Vac
Strappable Single-Phase
■
1.5, 3, 5 kW, 208Vac Three-Phase
■
20-50 mS Holdup
■
UL, CSA, TÜV, VDE, BABT
■
FCC/VDE Class B (single-phase)
■
FCC/VDE Class A (three-phase)
■
BUS OK, AC OK, DC OK
Status Signal
■
96-98% Efficiency
■
PC and Chassis Mount
■
VI-26X, VI-J6X Series Compatible
■
CE Marked
Rev 1 1 of 2
Front End Specifications:
(typical at T = 25˚C, nominal line, 75% load, unless otherwise specified)
Single Phase (250, 500, 750W)
AC Line Input
With Range Strap
Without Range Strap
Line Frequency
Line Inrush Current
115Vac Operation
230Vac Operation
240Vac Operation
AC Leakage Current
Power Factor (at full load)
Holdup Time (at full load)
Low Line
Nominal Line
AC Fail Warning Time
(at full load)
Strappable 115/230Vac
90 Vac to 135Vac
180 Vac to 270Vac
47 to 63 Hz (“C” Grade)
47 to 440 Hz (“I” Grade)
35A at peak line
67A at peak line
52A at peak line
1.9 mA max. at 250Vac,
63 Hz (“C ” Grade)
0.52 to 0.65 (at low line input)
250W (60 Hz): 4 ms min.
500, 750W (60 Hz): 7 ms min.
250W (60 Hz): 27 ms min.
500, 750W (60 Hz): 29 ms. min.
250W: None
500, 750W: 6 ms min.
3.2 mA max. at 208Vac, 63 Hz
0.9 (typical at nom. line)
Three Phase (1.5, 3, 5 kW)
208 Vac +20%/–10%
(Wye or Delta, ø to ø)
N/A
N/A
47 to 63 Hz (“C” Grade)
47 to 440 Hz (“I” Grade)
20 ms min. (47 Hz)
5 ms min.
Called Module Enable
Product Highlights
From AC line in, to highly regulated DC
out, Vicor offers the total design solution
through a complete family of off-line front
end and DC-DC modular power components.
Vicor’s family of off-line front ends
interface VI-260 and VI-J60 series
DC-DC converters, and MegaMods, to
100, 115, 230 or 240Vac single-phase and
208Vac three-phase mains. In addition,
front ends provide conducted EMI/RFI
filtering to FCC/VDE (Class B single-
phase, Class A three-phase), transient
surge protection, active inrush limiting, a
BUS OK status output (suitable for
controlling Vicor DC-DC converter
modules via their Gate In pin) and an AC
OK status output for system use in the
event of loss of the AC line.
Module Gate Control Output
Called BUS OK
(open drain FET, non-isolated,
referenced to –DC output)
ENABLE
Active High (FET cutoff)
Vds max. 18V transorb clamp
Power up threshold DC bus:
250W: 216V, ±12%
500, 750W: 244, ±3.5%
Active High (FET cutoff)
Power-up threshold >227V
Vds max: 15V zener clamp
ENABLE
Inactive state (DC BUS <190V ±5%) Inactive state (DC BUS <187Vdc)
Current sinking 100 mA @
Current sinking 100 mA @
.3 Vds max., threshold DC bus
.3Vds max.
250W: 172V, ±16%
500, 750W: 175V, ±3.5%
500, 750W only
AC OK and BUS OK
Operating Temperature
(Free Convection)
C: 0°C to +50°C (750W: +45°C)
I: -20°C to +50°C (750W: +45°C)
AC OK and BUS OK Status
Outputs (optically isolated,
transistor output; 500W,
750W only)
Off State Breakdown
Voltage
On State Voltage
On State Current
On State Threshold
(no load)
Off State Threshold
(load dependent)
Conducted EMI/RFI
Dielectric Withstand
70Vce max.
.4Vce (sat.) max. at 1 mA
15 mA max.
80-89Vac
85-76Vac
VDE 0871/FCC part 15, Class B
AC line (both phases)
to GND or case
1.5 kVAC; 2121Vdc
70 Vce max.
.4 Vce (sat.) max. at 1 mA
15 mA max.
>210 Vdc/187Vac
<205 Vdc/<182Vac
VDE 0871/FCC part 15, Class A
AC line (all phases)
to GND orcase
1.5 kVAC; 2121Vdc
IEC 61000-4-5, Level 3
1.2/50 µs, 2 kV,
either polarity
0 to 360 degree phase angle with
respect to AC line
1.2/50 µs, 1 kV pulse,
either polarity
0 to 360 degree phase angle with
respect to AC line
Storage Temperature
-40°C to +80°C
Transient Surge Withstand
IEC 61000-4-5, Level 3
Capability (with no disruption
of function)
Common Mode
1.2/50 µs, 2 kV,
either polarity
0 to 360 degree phase angle with
respect to AC line
Normal Mode
1.2/50 µs, 1 kV pulse,
either polarity
0 to 360 degree phase angle with
respect to AC line
12
1-800-735-6200
Thermal Considerations
Free Convection Derating
• 250W: Derate output power linearly
at 7.2W/˚C over 50˚C.
• 500W: Derate output power linearly
at 14.3W/˚C over 50˚C.
• 750W: Derate output power linearly
at 18.8W/˚C over 45˚C.
Forced Convection:
The curves below represent worst case data for chassis
mounted (enclosed) front ends, i.e., low line, full load.
System conditions such as higher line voltage, lighter
load or PC mount versions of the front ends will
increase reliability if the data here is used as the
nominal design criteria.
The sigmoid shape of the curves at low air flows is due
to the chassis mount cover restricting the airflow to the
inboard components until an airflow of approximately
200 LFM is achieved. Thereafter, the velocity of air
rushing over the cover causes air to be pulled in
through the side perforations, causing a rapid
improvement of cooling of internal components.
Max. Amb. Temp. vs. Airflow (LFM) Over Cover
(Full Load, 90 Vac In, Chassis Mount)
250W
80
Ambient Temperature
°C
Rev 1 2 of 2
Front End Selection Chart
Model
Single Phase
VI-FPE6-CUX
VI-FKE6-CUX
VI-FPE6-CQX
VI-FKE6-CQX
VI-FPE6-CMX
VI-FKE6-CMX
Three Phase
VI-TKY6-CHX
VI-TKY6-CEX
VI-TRY6-CCX
Mounting
PC Chassis
■
■
■
■
■
■
1,500
■
3,000
■
■
Output Power (Watts)
250
500
750
■
■
■
■
■
■
5,000
■
■
■
Front End Connection Diagram
INPUT
OUTPUT
(500W, 750W
FRONT END ONLY)
Ground All Baseplates To Earth
Ground
F2
+IN
GATE IN
- IN
VI-x6x
MODULE
EARTH
GROUND
A.C. MAINS
CONNECT
ST1 TO ST2
FOR 115Vac
OPEN FOR
230Vac
AC OK+
F1
Earth Ground
AC OK–
L1 (Phase)
L2 (Neutral)
ST1
ST2
BUS OK
VDC–
Vce sat.
<0.4V @
1.5 mA
+V
<70V
F3
VDC+
+IN
GATE IN
- IN
VI-x6x
MODULE
USE #4 HARDWARE
TORQUED @ 5 in.-lbs.
(4 PLACES)
F4
FUSING INFORMATION
FOR SAFE OPERATION, REPLACE ONLY WITH
RECOMMENDED FUSES
250W — FUSE 1: 6.3A/250V (IEC 5x20 mm) BUSSMAN
GDB-6.3 OR 7A/250V (3AG 1/4" X 1 1/4") LITTLEFUSE
314-007 OR BUSSMAN MTH-7 OR ABC-7
FUSES 2,3,4...n: 3A/250V BUSSMAN PC-TRON
500W — FUSE 1: 12A/250V BUSSMAN ABC-12,
LITTLEFUSE 314-012
FUSES 2,3,4...n: 3A/250V BUSSMAN PC-TRON
Fn
+IN
GATE IN
- IN
+IN
GATE IN
- IN
VI-x6x
MODULE
70
60
VI-x6x
MODULE
50
40
0
100
200
300
Airflow (LFM)
400
500
600
750W — FUSE 1: 15A/250V BUSSMAN ABC-15,
LITTLEFUSE 314-015
FUSES 2,3,4...n: 3A/250V BUSSMAN PC-TRON
500W
80
Ambient Temperature
°C
Notes:
1. If input power is applied with the DC output BUS shorted, the active inrush circuitry will usually prevent
Fuse 1 from blowing. Remove power, clear shorts, wait a few minutes and reapply input power.
2. If unit is strapped for 115V operation and 230V is applied, the internal overvoltage crowbar will clear
Fuse 1. Replace fuse, strap correctly and reapply power.
3. To control EMI/RFI most effectively, the return path to earth ground from either the front end or
modules should be made via a good RF ground. User must assure proper grounding for safe operation.
70
60
50
40
0
100
200
300
Airflow (LFM)
400
500
600
750W
80
Ambient Temperature
°C
70
60
50
40
0
100
200
300
Airflow (LFM)
400
500
600
For the latest Vicor Product Information: www.vicorpower.com
107
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