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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, TUV, 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 = 25C, 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, o to o) 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 singlephase, 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: 0C to +50C (750W: +45C) I: -20C to +50C (750W: +45C)
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 or case 1.5 kVAC; 2121Vdc IEC 61000-4-5, Level 3 1.2/50 s, 2 kV, either polarity 0 to 360 degree phase angle with respect to AC line 1.2/50 s, 1 kV pulse, either polarity 0 to 360 degree phase angle with respect to AC line
Storage Temperature
-40C to +80C
Transient Surge Withstand IEC 61000-4-5, Level 3 Capability (with no disruption of function) Common Mode 1.2/50 s, 2 kV, either polarity 0 to 360 degree phase angle with respect to AC line Normal Mode 1.2/50 s, 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 50C. * 500W: Derate output power linearly at 14.3W/C over 50C. * 750W: Derate output power linearly at 18.8W/C over 45C. 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
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