KEPCO RKW 1500W Series Operator Manual - Manual (Page 3)

228-1503 REV 4 060110
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1. INTRODUCTION
1.1 SCOPE OF MANUAL
This Operator's Manual covers the installation and operation of the Kepco RKW 1500W Series of
PFC (Power Factor Corrected), RoHS (Reduction of Hazardous Substances) compliant, switching
power supplies. For service information, write directly to: Kepco Inc., 131-38 Sanford Avenue,
Flushing, New York, 11355, U.S.A. Please state Model Designation and Serial Number of your
RKW Power Supply. This information can be found on the nameplate of the unit.
1.2 DESCRIPTION
The Kepco RKW 1500W Series consists of seven models of switching power supplies, each with
a single output as shown in Table 1. Units may be operated with a nominal 100V a-c to 240V a-c
(input voltage range 85 to 265 Va-c), 50-60 Hz (input frequency range 47-66Hz). They will also
operate on 110V to 370V d-c input. The RKW 1500W Series employs a light weight ferrite core
with a switching frequency of about 140 KHz (about 100 KHz for the 3.3 volt model). Regulation is
provided by pulse width modulation. A power stage with two MOSFETS on each side of the pri-
mary winding, operating in the forward mode provides a smooth isolated d-c output. A thyristor cir-
cuit prevents excessive turn-on current surge. Overvoltage, overcurrent, undervoltage,
overtemperature and fan failure protections, an isolated remote TTL ON-OFF control, a power fail
signal and current balancing (for parallel operation) are provided. An LED “output voltage ON”
light and an output voltage adjust trimmer are visible near the output bus bars (right side of the
case). Units are manufactured on a steel frame with a steel cover.
2. SPECIFICATIONS
Table 1 contains specifications and operating limits of individual RKW 1500W Series models.
Table 2 contains specifications and operating limits common to all RKW 1500W Series Models.
These specifications are at nominal input voltages at 25°C unless otherwise specified.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS
MODEL RKW 1500W 3.3-375K 5-300K 12-125K 15-100K 24-65K 28-55K 48-32K
Output Volts d-c 3.3V 5V 12V 15V 24V 28V 48V
Adjustment Range 1.8-3.6 3.5-6.0 7.2-14.4 10.5-18.0 16.8-28.8 19.6-33.6 33.6-52.8
Voltage Setting 3.3 ±0.03 5 ±0.05 12 ±0.12 15 ±0.15 24 ±0.24 28 ±0.28 48 ±0.48
–10°C to
40°C
Amps 375 300 125 100 65 55 32
Watts 1237.5 1500 1500 1500 1560 1540 1536
Maximum
Output
Ratings
(A,W)
50°C
amb
Amps 346.88 300 125 100 65 55 32
Watts 1144.69 1500 1500 1500 1560 1540 1536
60°C,
amb
Amps 300 240 100 80 52 44 25.6
Watts 990 1200 1200 1200 1248 1232 1228.8
65°C,
amb
Amps 262.5 210 87.5 70 45.5 38.5 22.4
Watts 866.25 1050 1050 1050 1092 1078 1075.2
Overcurrent Setting (Amps) (1) 390-430 315-350 130-140 105-115 68-72 57.7-63.2 33.6-36.8
Current Short Circuit 430 350 152 135 80 70 45
OVP Setting (Volts) (2) 4.0 - 4.6 6.2 - 7.0 14.8 - 16.8 18.6 - 21.0 29.8 - 33.6 34.7 - 39.2 55.0 - 59.9
Efficiency
% typical
AC Input 100V 73 77 80 82 82 82 84
AC Input 200V 77 82 84 86 86 86 88
Ripple &
Noise (3)
(mV, p-p)
ripple 100 100 150 150 200 200 300
ripple noise 200 200 200 200 300 300 400
(1) Square type. If overcurrent condition continues for approximately 30 seconds, the output is shut OFF. Recovery is by
removing power and reapplying power after about 40 seconds or by opening and reclosing the RC terminals .
(2) When overvoltage is detected, output is shut OFF. Recovery is by removing power and reapplying power after about 40
seconds or by opening and reclosing the RC terminals (no delay).
(3) Ripple and noise specifications is 1.5 times the indicated values for a temperature range of -10 to 0°C. Ripple and noise
levels above are satisfied when conditions are 0 to 100% load, 0 to 65°C, and bandwith