KEPCO RAX 300W User Manual
Kepco, 300 watt single output switching power supplies, I — introduction
©2000 KEPCO, INC
Data subject to change without notice
228-1228 REV 2
1
I N S T R U C T I O N M A N U A L
RAX
KEPCO
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]
An ISO 9001 Company.
300 WATT SINGLE OUTPUT
SWITCHING POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers the installation and operation of the Kepco RAX 300W Series of Switch-
ing Power Supplies. For service information, please refer to the Service Manual for the RAX 300W Series, which can be pur-
chased either from your Kepco Representative, 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 300W Series consists of six models of switching power supplies, with a single output as shown
in Table 1. Units may be operated with either 115V a-c or 230V a-c 47-440Hz input. They will also operate on 240V to 370V d-c
input. The RAX 300W Series employs a light weight ferrite core with 145 KHz switching frequency. Regulation if provided by
pulse width modulation. A FET power stage, operating in the forward conversion mode provides a smooth isolated d-c output. A
triac “soft-start” circuit prevents excessive turn-on current surge. Overvoltage 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 300W Series models. Section II (following) contains spec-
ifications and operating limits common to all RAX 300W Series Models.
II — SPECIFICATIONS
The following specifications are at nominal input voltages at 25°C unless otherwise specified.
INPUT VOLTAGE: (Jumper selectable, see Section III, FIG. 3):
120V a-c nominal, range: 85 -132V a-c, (90-132V a-c for model RAX 28-10K)
220-240V a-c nominal, range: 170 -264V a-c , (180-264V a-c for model RAX 28-10K)
320V d-c nominal, range: 240 -370V d-c
For d-c input the jumper is placed in the 230V position.
INPUT SOURCE FREQUENCY:
Nominal 50/60 Hz; Range 47-440 Hz. (At 440 Hz the leakage current exceeds the VDE safety specification limit.)
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RAX 300W SERIES
MODEL
RAX 5-60K
RAX 12-25K
RAX 15-20K
RAX 24-12K
RAX28-10K
RAX 48-6K
OUTPUT VOLTS, d-c
5V 12V15V24V28V48V
ADJUSTMENT RANGE
4.0 - 5.5V8.4 - 13.2V
12.0 - 16.5V
16.8 - 26.4V
19.6 -30.8V
32.6 - 52.8V
MAXIMUM
OUTPUT
RATINGS
(AMPS,
WATTS)
50° C amb.
60.0A/300W
25.0A/300W
20.0A/300W
12.0A/288W
10.0A/280W
6.0A/288W
60° C amb.
42.0A/210W
17.5A/210W
14.0A/210W
8.4A/201.6W
7.0A/196W
4.2A/201.6W
71° C amb.
24.0A/120W
10.0A/120W
8.0A/120W
4.8A/115.2W
4.0A/112W
2.4A/115.2W
CURRENT LIMIT (AMPS)
(1)
65.0 - 70.0
28.0 - 30.0
22.0 - 24.0
13.2 - 14.4
12.0 - 16.0
6.8 - 7.4
OVP RANGE (VOLTS)
6.0 - 6.9
13.7 - 15.7
17.0 - 19.5
27.0 - 30.5
32.0 - 35.0
55.0 - 63.0
RIPPLE
AND
NOISE
(2)
(mV p-p)
source (typ)
5
15
15
25
30
35
source (max)
10
30
30
40
60
90
switching (typ)
25
25
25
25
25
25
switching (max)
40
50
50
60
60
60
spike noise
(max)
(3)
100
170
200
290
330
530
(1)
Change of current setting with the specified variations for operating temperatures and source input voltage is within ±10% of the rated values.
(2)
Source component 2x source frequency, and switching component approximately 145KHz.
(3)
Measured with a 50 MHz bandwidth.
CAUTION: UNIT IS SET
TO 115V AC OPERATION