KEPCO RCW 1500W User Manual
OPERATOR’S MANUAL
RCW 1500W SERIES
POWER SUPPLY
SINGLE OUTPUT, UNIVERSAL INPUT
KEPCO INC.
An ISO 9001 Company.
IMPORTANT NOTES:
1) The contents of this manual are protected by copyright. Reproduction of any part can be
made only with the specific written permission of Kepco, Inc.
2) Data subject to change without notice.
SINGLE PHASE, 0.99 POWER FACTOR
MODEL
RCW 1500W SERIES
POWER SUPPLY MODELS
RCW 3.3-300K, RCW 5-300K, RCW 12-125K,
RCW 15-100K, RCW 24-65K, RCW 28-55K,
RCW 48-32K
KEPCO®
©2007, KEPCO, INC
P/N 228-1502R1
KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11355 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102
email: hq@kepcopower.com ! World Wide Web: http://www.kepcopower.com
THE POWER SUPPLIER™
TABLE OF CONTENTS
SECTION PAGE
1.0 Introduction.............................................................................................................................................. 1
1.1 Scope of Manual ..................................................................................................................................... 1
1.2 Description .............................................................................................................................................. 1
2.0 Specifications .......................................................................................................................................... 1
3.0 Operation................................................................................................................................................. 4
3.1 Installing The Power Supply .................................................................................................................... 4
3.2 Connecting The Load (Local Sense) ...................................................................................................... 7
3.3 Connecting The Load (Remote Sense) .................................................................................................. 7
3.4 Voltage Adjustment ................................................................................................................................. 7
3.5 Remote Voltage Control .......................................................................................................................... 8
3.6 Remote Turn-on Turn-off......................................................................................................................... 9
3.7 Parallel Operaton .................................................................................................................................... 9
3.8 Master/Slave Operation......................................................................................................................... 11
3.9 Preliminary Electrical Check.................................................................................................................. 11
4.0 Alarm Functions .................................................................................................................................... 13
4.1 Overvoltage And Overtemperature Protection ...................................................................................... 13
4.2 Undervoltage Protection........................................................................................................................ 14
4.3 PF Input Power Failure.......................................................................................................................... 14
4.4 Fan Failure ............................................................................................................................................ 15
5.0 Fan Replacement .................................................................................................................................. 15
6.0 Fan Maintenance................................................................................................................................... 15
LIST OF FIGURES
FIGURE TITLE PAGE
1 RCW 1500W Power Supply Peak To Peak Input Surge Current For T<50us ........................................... 3
2 Percent Power Rating Versus Ambient Temperature ................................................................................. 4
3 Mechanical Outline Drawing OfThe RCW 1500W Power Supply ............................................................. 5
4 Mounting Positions For The RCW 1500W Power Supply ........................................................................... 6
5 Connections For Remote Sensing With The RCW 1500W Power Supply.................................................. 7
6 Terminal Locations Of The RCW 1500W Power Supply............................................................................. 8
7 Connections For Remote Voltage Control Of The RCW 1500W Power Supply ......................................... 9
8 Parallel Connection of Three RCW Power Supplies ................................................................................ 10
9 Functional Checkout Of The RCW 1500W Power Supply ....................................................................... 12
10 Logic Alarm Optical Coupler Output For The RCW 1500W Power Supply ............................................... 13
11 Timing Diagrams For The RCW 1500W Power Supply ............................................................................ 14
LIST OF TABLES
TABLE TITLE PAGE
1 Power Supply Ratings And Specifications ..................................................................................................1
2 Power Supply Ratings and Specifications ..................................................................................................2
RCW 1500W 120607 i
1.0 INTRODUCTION
1)
The P
1.1 SCOPE OF MANUAL
This Operator's Manual covers the installation and operation of the Kepco RCW 1500W Series of
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 RCW Power Supply. This information can be found on the nameplate of the unit.
1.2 DESCRIPTION
The Kepco RCW 1500W Series consists of seven models of Switching Power Supplies, with a single output as shown in Table 1. RCW power supplies are compliant with the Low Voltage Directive
(LVD) and carry the CE Mark. Units are designed to operate with a universal input voltage within the
range of 85 to 264V AC and may be operated with either 100-120V AC, or 200-240V AC, 50-60 Hz
(47-66 Hz) input. They will also operate on 125V to 370V dc input. The RCW 1500W Series
employs a light weight ferrite core transformer with 150 KHz typical switching frequency. The
Power Factor Correction Circuit has a typical switching of 80 KHz. Regulation is provided by pulse
width modulation. A FET power stage, operating in the forward conversion mode provides a
smooth isolated dc output. A resistor and thyristor "soft-start" circuit prevents excessive turn-on
current surge. Overvoltage protection and optically isolated remote TTL ON-OFF control are provided. Current limiting with automatic recovery from short circuit is featured. Units are enclosed in a
wrap-around aluminum case with a green LED "output present" light visible on the terminal side of
the case.
2.0 SPECIFICATIONS
Table 1 contains specifications and operating limits of individual RCW 1500W Series models. Table
2 contains specifications and operating limits common to all RCW 1500W Series Models. These
specifications are at nominal input voltages at 25°C unless otherwise specified.
TABLE 1. POWER SUPPLY RATINGS AND SPECIFICATIONS
MODEL RCW 1500W 3.3-300K 5-300K 12-125K 15-100K 24-65K 28-55K 48-32K
Output Volts d-c
Adjustment Range
Maximum
Output
Ratings
(Amps/
Watts
Current Limit (Amps)
OVP Settings (Volts)
Efficiency %
typical
Ripple &
(3)
Noise
(mV, p-p)
Transient
Recovery
(5)
50°C, amb A
50°C, amb W
60°C, amb A
60°C, amb W
70°C, amb A
70°C, amb W
AC Input 120V 70 75 76 76 78 79 80
AC Input 240V 73 80 81 81 82 83 84
output ripple (max) 100 100 100 100 100 100 100
spike noise (max)
Recovery to
1%(<ms)
(6)
Excursion ±V max
(7)
(1)
(2)
3.3V 5V 12V 15V 24V 28V 48V
1.8-3.5 3.5~5.5 8.4~13.2 12.0~16.5 16.5~26.4 25.2~30.8 30.8~52.8
300 300 125
1050 1500 1500
210 210 87.5 70A 45.5 38.5 22.4
735 1050 1050 1050 1092 1078 1075.2
120 120 50 40 26 22 12.8
420 600 600 600 624 616 614.4
315-350 315-350 130-140 105-115 68-72 57.7-63.2 33.6-36.8
3.96-4.62 6.0-7.0 13.2-15.6 16.5-19.5 26.4-31.2 30.8-36.4 49.44-59.04
(4)
200 200 200 200 200 200 300
111111 1
1.0 1.0 1.0 1.0 1.0 1.0 1.0
100
1500
65 55 32
1560 1540 1536
ower Supply has a square type overcurrent characteristic, shutdown by undervoltage detection
2)
The Power Supply has a shut-down type (by tracking) overvoltage characteristic. Recovery time to reset 40 seconds minimum
3)
Source component 2x source frequency and switching component approximately 150 KHz, 10 to 100% load and ambient Ta = 25°C
4)
Measure with a 50MHz bandwidth, 10 to 100% load and ambient Tc= 25°C
5)
Output voltage setting = ±1%
6)
A step load change from 50% to 100% of rated load current (with the following tr, tf load changes) produces no more than the output
voltage excursions listed in the above table. The load change will be 5A/µs for Io>20A and 1A/µs for I<20A tr, tf of load change: 3.3v and
5v>30µs, 12v>12.5µs, 15v>10µs, 24v>6.5µs, 28v>5.5µs, 48v>3.2µs,
7)
Recommended (using internal adjustment pot, par. 3.4). Using external pot (par.3.5) range = 10% to 110% of rated output voltage.
RCW 1500W 120607 1
TABLE 2. POWER SUPPLY RATINGS AND SPECIFICATIONS
SPECIFICATION DESCRIPTION
Input Voltage Nominal: 100-120Vac or 200-
240Vac
Range 125-370 Vdc Polarity insensitive. Safety ratings apply for a-c
Input Source Frequency Nominal 50/60 Hz, Range 47-440 Hz. (At 440 Hz the leakage current exceeds the
VDE safety leakage specification limit).
Brownout Voltage 80 V ac min
Input Current: (Maximum Load At 50°C with
Nominal Output Voltage)
120V ac
240V ac
Input Protection Units Are Protected Against Shorts By An Input Fuse. Fuse Value 30.0A At 250
Volts
Input Surge at 25° C from cold start; resistor
and thyristor soft start circuit reduces start-up
surge. (see Figure1)
120V ac 20.0A max. first surge
240V ac
Stabilization Typical Maximum
Source Effect (min - max) (85 to
132 V ac, 170 to 264V ac)
Load Effect, measured at sensing terminals (0%-100% load
change)
Temperature Effect (–10° to
71°C)
Combined Effect (envelope,
Source, Load and Temperature)
Drift (8 hours at 25°C) 0.2% 0.5%
Transient Rec’y Test Conditions
MODEL / tr, tf of load change
≥ µs
3.3V/30µs, 5V/30µs, 12V/12.5µs, 15V/10µs, 24v/6.5µs, 28V/5.5µs. 48V/3.2µs
Output Holding Time: Output is maintained for 30 milliseconds typical upon input interruption (20 milli-
seconds minimum) with nominal 120 volts AC input voltage and output load at
50°C current rating.
Start-up Time 900 msec maximum, 600 typical.
Overvoltage Protection When the Power Supply goes into an overvoltage condition, the output is cut OFF.
To restart (reset) the unit, it is necessary to remove the AC input power, wait 40
seconds, and then to reconnect the AC input power.
Operating Temperature: -10 to 71°C (see Figure 2)
Storage Temperature: -30°C to +75°C
Humidity: 10% to 95% relative humidity, noncondensing, Wet Bulb temperature<35°C
Isolation
(at 25°C ambient, 65% relative humidity)
Between input and case, 2500Vac for 1 minute
Between input and output terminal, 2500Vac for 1 minute. Cutout current is
20mA
Insulation Resistance: (at 25°C, 65% relative
humidity)
Between output and case, input and case, and input and output, 100 Megohms
minimum (500Vdc)
Leakage Current: 1.0 mA max at 120 Vac (U.L. Method 50 to 60 Hz)
2.0 mA max at 240Vdc (VDE Method 50 to 60 Hz, two terminal connection)
Range: 85-264 Vac
input operation only.
22A RMS max., and 16A RMS max for the
3.3V output model
11A RMS max., and 8A RMS max for the 3.3V
output model
40.0A max. first surge
0.05%
0.2%
(1)
(2)
0.1%
0.3%
(1)
(2)
0.5% 1.0%
± 0.7% ± 1.5%
2 RCW 1500W 120607
TABLE 2. POWER SUPPLY RATINGS AND SPECIFICATIONS (CONTINUED)
SPECIFICATION DESCRIPTION
Vibration:
(non-operating 1 hour on each of three axes,
5-10 Hz., 10mm amplitude, 10-200 Hz., 64.3ft./s
2
( 19.6M/s2)
Power Supply is fixed on its bottom side)
1) 2 mV typ,4mV maximum for the 3.3 volt Model
2) 10mV typ,15mV maximum for the 3.3 volt Model
Shock:
(non-operating, 1/2 sine pulse, three shocks
964.6ft./s
2
(294M/s2 ), 11ms ± 5 msec pulse duration
on each axis, Power Supply is fixed
on its bottom side)
Input Transient: The RCW Power Supply (with a 50 ohm termination) should operate trouble free
when a 1us, 2K Volt, 50–60 Hz input is applied between the input and ground terminals.
EMI Conducted: FCC Class A
Safety: UL 1950 Recognized, CSA Electrical Bulletin 22.2, No. 234, Level 5 Certified and
EN 60 950 (TUV) Approved, CE marked per Low Voltage Directive (LVD)
Remote Error Sensing: The RCW 1500W Power Supply will compensate up to 0.15 Volts max per load
wire for the RCW 3.3-300K, and up to 0.25 Volts per load wire for the RCW
5-300K, and up to 0.4 Volts per load wire for all other RCW Models (see Figure 5).
Remote Control ON/OFF: "High", 2.4V to 24V (or open), unit ON
"Low", 0.0V to 0.4V (or closed), unit OFF- Fan Off
Source current is 1.6mA maximum
The (±)RC terminals are isolated from the AC input terminal and the DC output
terminals. Under normal conditions the (±)RC terminals are high, so when the
function is not used the terminals should be left open.
Power Factor 0.99 typical, satifies EN61000-3-2 Requirements
Dimensions: 4.33 in. (110 mm) x 7.99in. (203 mm) x 8.66 in. (220 mm)
Mounting: No. M4x8 tapped holes
Maximum Screw Penetration: 0.24 in. (6 mm)
Cooling: Forced air flow - two fans
Frame Material/Cover Material: Aluminum
Weight: 16.53lbs. (7.5 Kg)
RCW 1500W 120607 3
FIGURE 1 RCW 1500W POWER SUPPLY PEAK TO PEAK INPUT SURGE CURRENT FOR T<50US
FIGURE 2 PERCENT POWER RATING VERSUS AMBIENT TEMPERATURE
3.0 OPERATION
3.1 INSTALLING THE POWER SUPPLY
The unit may be mounted in accordance with the Mechanical Outline Drawing, Figure 4 (mounting
holes are provided). The temperature of the air surrounding the Power Supply must not exceed the
ambient values given in the Specifications Table 1. See Figure 3 for horizontal and vertical mounting of the RCW 1500W Power Supply.
The RCW 1500W has four tapped Metric M4x8L mounting holes on the bottom side of the unit for
horizontal installation as well as eight tapped Metric M4x8L mounting hole on the side surfaces for
vertical installation. Free air space must be provided at the rear of the unit to allow for maximum
ventilation and exhaust of the fans. Power Supply specifications should be derated for certain operating temperatures (refer to Table 2).
Referring to Figure 3, the air cooling holes on the front panel of the unit and the front of the fan and
on the top cover should be kept clear at least 1 inch (20mm) from adjacent equipment and in a well
ventilated a rea.
4 RCW 1500W 120607
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