KEPCO RAX 1500W - Manual

©2000, KEPCO, INC 1
Data subject to change without notice 228-1229 REV 2
I N S T R U C T I O N M A N U A L
RAX
KEPCO
An ISO 9001 Company.
KEPCO, INC. !"! 131-38 SANFORD AVENUE !" FLUSHING, NY. 11352 U.S.A.!" TEL (718) 461-7000!"! FAX (718) 767-1102!!
http://www.kepcopower.com "! email: [email protected]
1500 WATT SINGLE OUTPUT
SWITCHING POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers the installation and operation of the Kepco RAX 1500W Series of Switching Power Supplies.
For service information, please refer to the Service Manual for the RAX 1500W Series, which can be purchased either from your Kepco Representa-
tive, or by writing directly to: Kepco Inc. 131-38 Sanford Avenue, Flushing, New York 11352, U.S.A. When ordering a Service Manual, please state
Model Designation and Serial Number of your RAX power supply. This information can be found on the nameplate of the unit.
DESCRIPTION. The Kepco RAX 1500W Series consists of four models of switching power supplies, with a single output as shown in Table 1. Units
may be operated with either 120V a-c or 220-240V a-c, 47-440Hz input. They will also operate on 240V to 370V d-c input. The RAX 1500W Series
employs a light weight ferrite core with 165
K Hz switching frequency. Regulation is provided by pulse width modulation. A FET power stage, operating
in the forward conversion mode provides a smooth isolated d-c output. A thyristor “soft-start” circuit prevents excessive turn-on current surge. Over-
voltage protection and optically isolated remote TTL on-off control is provided. Current limiting with automatic recovery from short circuit is featured.
Units are enclosed in a wrap-around aluminum case with an LED “output present” light visible on the terminal side of the case.
Table 1 contains specifications and operating limits of individual RAX 1500W Series models. Section II (following) contains specifications and operat-
ing limits common to all RAX 1500W Series Models.
II — SPECIFICATIONS
The following specifications are at nominal input voltages at 25°C unless otherwise specified.
INPUT VOLTAGE: (Jumper selectable from front panel, see Section III):
120V a-c nominal, range: 85 -132V a-c
220-240V a-c nominal, range: 170 -264V a-c,
320V d-c nominal, range: 240 -370V d-c
For d-c input, remove shorting link from left side barrier strip terminals.
INPUT SOURCE FREQUENCY:
Nominal 50/60 Hz; Range 47-440 Hz. (At 440 Hz the leakage current exceeds the VDE safety specification limit.)
BROWNOUT VOLTAGE:
120V a-c input selection, 80V a-c min.
220-240V a-c input selection, 160V a-c min.
320V d-c input selection, 220V d-c min.
INPUT CURRENT: (At 25°C with nominal output power):
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RAX 1500W SERIES
MODEL RAX 5-300K RAX 12-125K RAX 24-65K RAX 48-30K
OUTPUT VOLTS, d-c 5V 12V 24V 48V
ADJUSTMENT RANGE 4.0 - 5.5V 8.4 - 13.2V 16.8 - 26.4V 32.6 - 52.8V
MAXIMUM
OUTPUT
RATINGS
(AMPS, WATTS)
50° C amb. 300.0A/1500W 125.0A/1500W 65.0A/1560W 30.0A/1440W
60° C amb. 210.0A/1050W 87.5A/1050W 45.5A/1092W 21.0A/1008W
71° C amb. 120.0A/600W 50.0A/600W 26.0A/624W 12.0A/576W
EFFICIENCY 79% 81% 83% 84%
CURRENT LIMIT (AMPS) 315.0 - 350.0 130.0 - 140.0 68.0 - 72.0 32.0 - 35.0
OVP RANGE (VOLTS) 6.0 - 6.9 13.7 - 15.7 27.0 - 30.5 55.0 - 59.0
RIPPLE
AND
NOISE
(1)
(mV p-p)
source (typ) 5 15 25 35
source (max) 20 30 40 90
switching (typ) 50 60 60 70
switching (max) 120 150 150 150
spike noise (max)
(2)
200 250 300 500
(1) Source component 2x source frequency, and switching component approximately 165KHz.
(2) Measured with a 50 MHz bandwidth, p-p.
INPUT SOURCE NOMINAL INPUT VOLTAGE MINIMUM INPUT VOLTAGE
120 V a-c input selection 25A - 32A 21A -41A max.
220-240V a-c input selec-
tion
16A - 18A 18A -36A
d-c input selection 7.0A max. (320V input) 9.0A max. (240V input)
CAUTION: UNIT IS SET
TO 115V AC OPERATION