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INSTRUCTION MANUAL
KEPCO
An ISO 9001 Company.
100 WATT SINGLE OUTPUT, PFC,
OPEN FRAME POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers
the installation and operation of the Kepco RKW 100W
Series of Open Frame, PFC (Power Factor Corrected),
RoHS (Reduction of Hazardous Substances) compliant
switching power supplies.
DESCRIPTION. The Kepco RKW 100W Series consists of seven models of switching power supplies, 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; units operate up to 440Hz although leakage current, power factor and efficiency specifications may not be met.). They will also operate on 110V to 370V d-c input. The RKW 100W Series employs a forward converter with a fixed switching frequency of 135kHz. Power Factor Correction (PFC) is provided by a boost converter operating at 80kHz. Regulation is provided by pulse width modulation. A thermistor cir-
RKW
100W SERIES
cuit prevents excessive turn-on current surge. Remote
programming of output voltage using an external resistance
can be implemented. Overvoltage and overcurrent protection is provided. Current limiting with automatic recovery
from short circuit is featured. Units are convection cooled Lchassis construction. A steel cover (Model CA 35-R) is
available as an option (contact factory for derating with
cover).
Specifications and operating limits for individual RKW
100W models are listed in Table 1, Section II describes
RKW 100W features. Section III contains specifications and
operating limits common to all RKW 100W Series Models.
Section IV describes installation and Section V describes
operation.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, RKW 100W SERIES
MODEL
OUTPUT VOLTS, d-c
ADJUSTMENT RANGE, Vd-c
OUTPUT CURRENT (AMPS)
-10 to +50 °C
CURRENT LIMIT
SHORT CIRCUIT CURRENT
OVP SETTING
EFFICIENCY
RIPPLE
AND
(3)
NOISE
(mV p-p)
External Potentiometer
(1) An overvoltage shuts down the output. Recover by recycling a-c input (30 second delay required before resetting).
(2) The current limit is rectangular. After the overload is removed, output is automatically restored.
(3) Bandwidth 100 MHz. Ripple and noise will be approximately 1.5 times these values in the operating temperature range -10 ~ 0°C. The ripple and
noise values tabulated are valid when the output is derated as shown in Figure 1 from 50 ~ 65°C
(4) Used for remote programming of output voltage. See Section IV OPERATION, REMOTE VOLTAGE PROGRAMMING.
(5) Peak Current: 6.5A (useful for motor start applications). Thermal protection (24V model only) cuts off output voltage if overtemperature detected;
after sufficient cooling, output voltage returns automatically.
(2)
(AMPS)
(AMPS)
(1)
(VOLTS)
100 Va-c
240 Va-c
Switching ripple
(typ)
spike noise
(typ)
(2)
(4)
RKW 3.3-25K RKW 5-20K RKW 12-8.5K RKW 15-7K RKW 24-4.5K RKW 28-3.8K RKW 48-2.1K
3.3V 5V 12V 15V 24V 28V 48V
2.85-4.0 4.0-5.8 9.6-13.2 12-16.5 19.2-26.4 22.4-30.8 38.4-52.8
25 20 8.5 7
26.25 min 21 min 8.92 min 7.35 min 6.82 min 3.99 min 2.2 min
(2)
37.5 27.5 11.5 10 10 7.5 4.5
4.2-5.2 6.0-6.9 13.7-15.7 17.0-19.0 27.0-30.5 32.0-35.0 55.0-60.0
74% 77% 80% 80% 81% 81% 83%
77% 82% 84% 84% 85% 85% 86%
80 80 100 100 100 100 130
120 120 150 150 150 150 200
1K Ohms 1K Ohms 2K Ohms 2K Ohms 5K Ohms 5K Ohms 10K Ohms
4.5
(5)
3.8 2.1
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
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©2010, KEPCO, INC 1
Data subject to change without notice 228-1445 REV 9
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II — FEATURES
• Green Output on LED indicator
• Remote Error Sensing
• Overvoltage/Overcurrent protection
• Power Factor Corrected, wide range a-c input
• Convection cooling
III — SPECIFICATIONS
The following specifications are at nominal input voltages
at 25°C unless otherwise specified.
INPUT:
Voltage: 100-240V a-c nominal; Range 85-265V a-c
(0 to 100% load, -10 to 71°C); 110-370V d-c.
(polarity insensitive; consult factory) Safety
agency approval applies only to a-c input operation.
Frequency: Nominal 50-60 Hz; Range 47-440Hz
to 100% load, -10 to 71°C),
(at 440Hz leakage cur-
rent exceeds UL/VDE safety specification limit).
Current (nominal output at 100% load):
@100-120V a-c rms:
5V - 48V models: 1.4A a-c rms max.
3.3V model: 1.2A rms max.;
@200-240V a-c rms:
5V - 48V models:
0.7A a-c rms max.
3.3V model: 0.6A rms max.;
Input Protection and Soft Start: Thermistor circuit
reduces start-up surge. Units are protected
against shorts by an input fuse. Fuse value 3.15A,
250V Littlefuse P/N 2153.15MF018, Kepco P/N
541-0135)
Initial Turn-on Surge: (cold start 25 °C, first surge
only, not including the current flow into the EMI filter):
@100V a-c rms: 14A typ.,
@200V a-c rms: 28A typ.
Switching Frequency: 135kHz typical, PFC boost
converter: 80kHz typical, nominal load
LEAKAGE CURRENT:
@120V a-c and 60 Hz: 0.35mA max, 0.23mA typ.
@240V d-c and 60 Hz: 0.70mA max, 0.45mA typ.
(operating in conformance with UL 1950/IEC 950)
POWER FACTOR:
@100V a-c: 0.99 typ.
@200V a-c: 0.95 typ.
STABILIZATION:
Source Effect (Range 85 to 132Va-c or
170-265 Va-c): 0.1% typ., 0.2% max.
Load Effect measured at sensing terminals
(0% - 100% of rated output current):
0.1% typ., 0.4% max.
Temperature effect (-10 to 71°C):
0.5% typ., 1.0% max.
Combined effect: 0.9% typ., 1.8% max.
Drift (1/2 to 8 hr. at 25°C): 0.2% typ., 0.5% max.
(0
• SEMI-47 compliant
• RoHS compliant
• DIN-Rail mountable
• Remote Voltage Programming
• Parallel/Series Operation
NOTE:
SEE FIGURE 4 FOR MOUNTING DIRECTION.
MOUNTING A, WITHOUT COVER
MOUNTING B, C, WITHOUT COVER;
MOUNTING A, WITH COVER
MOUNTING C, WITH COVER
MOUNTING B, WITH COVER
(*)
100
)
90
%
(
g
80
n
i
t
a
70
R
r
60
e
w
o
50
P
t
u
40
p
t
u
30
O
20
10
FIGURE 1. OUTPUT POWER VS. TEMPERATURE
THE POWER SUPPLY WILL
STARTUP BETWEEN -20
AND -10°C BUT MAY
NOT MEET PUBLISHED
SPECIFICATIONS.
0-20 -10 10 20 3530 40 45 605550
Ambient Temperature (°)
(*) 24 VOLT MODEL: RMS OUTPUT POWER
25
71
TRANSIENT RECOVERY: A step load change from 50% to 100% of rated output current in 50 microseconds or more, produces no more than 4% output voltage excursion. Recovery time is 1ms maximum.
OUTPUT HOLDING TIME: Upon input interruption the output is maintained for:
@100V a-c: 37 mS typ. (20 mS min.)
@240V a-c: 45 mS typ. (25mS min.).
START UP TIME:
@100V a-c: 500mS max., 300mS typ.
@240V a-c: 200mS max., 100mS typ.
OVERVOLTAGE PROTECTION: Fixed, factory set. See Table 1. The overvoltage circuit is set by Zener diode clamp; latching will occur.
OVERCURRENT: Square type, output voltage returns to rated level upon removal of cause of malfunction.
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
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2 228-1445 REV 9 082610
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OPERATING TEMPERATURE: -10 to 50°C (start up 20 to -10°C). See the derating, Figure 1. Do not allow the power supply to become dust covered because that will decrease the cooling efficiency of the unit and cause insulation to deteriorate.
STORAGE TEMPERATURE: -30°C to + 75°C.
COOLING: Natural convection.
ORIENTATION: Vertical or horizontal.
HUMIDITY: 10% to 95% RH, operating and storage,
noncondensing, wet bulb temperature < or = 35°C.
DIELECTRIC STRENGTH: (at 15 to 35°C ambient, 10
to 85% relative humidity, cutout current 20 ma):
Between input and output terminals:
3.0 KV a-c for one minute.
Between input terminals and ground:
2 KV a-c for one minute.
Between output terminals and ground:
500V a-c for one minute.
INSULATION RESISTANCE: Between input and out-
put, input and ground, output and ground: 100
megohms minimum (500V d-c, 15 to 35°C ambient, 10 to 85% relative humidity).
VIBRATION: Three axes, one hour each, sweep time 10
min:, nonoperating:
5-10 Hz., 10 mm amplitude.
10-200 Hz., 2G (19.6m/s
2
).
SHOCK: (non-operating, one-half sinusoidal pulse, three
shocks to each axis):
Acceleration: 60G (588m/s
Duration: 11mS +
5mS
2
),
EMC - EMISSIONS:
Radiated Noise 30MHZ to 1GHz: FCC Class B,
VCCI-B, EN55011-B, EN55022-B
Conducted Noise 0.15MHz to 30MHz:
FCC Class B, VCCI-B, EN55011-B, EN55022-B
Input Harmonics (on AC Mains) 0 to 2kHz:
EN 61000-3-2.
EMC - IMMUNITY:
ESD: EN 61000-4-2 Level 4, Normal operation.
Radiated Field Noise:
EN 61000-4-3 Level 3, Normal operation.
Electrical Fast Transient/Burst (EFT):
EN 61000-4-4 Level 3, Normal operation.
Surge: EN 61000-4-5 Level 4, no damage.
Conducted Noise:
EN 61000-4-6 Level 3, Normal operation.
Power Frequency Magnetic Field:
EN 61000-4-8 Level 4, Normal operation.
Voltage Dips, Short Interruptions, Voltage Variation:
EN 61000-4-11, Normal operation.
SAFETY: All units designed to meet EN 60950 (U.S. UL 60950 3rd Ed.; Canada: CAN/CSA-22.2 No. 60950-00 3rd Ed. (ambient temp. 50°C)". RKW 100W units are CE marked per the Low Voltage Directive (LVD), EN60950. [The standards do not apply with DC input operation.]
WEIGHT: 21 oz. (600 grams) max.
WARRANTY: One year.
IV — INSTALLATION
MOUNTING THE POWER SUPPLY: Refer to Fig-
ures 4 and 5. The unit may be mounted on one mounting
surface. Note the restrictions for maximum penetration of
mounting screws. The air surrounding the power supply
must not exceed the ambient values given in the graph in
Figure 1.
CONNECTIONS: Connect the load to the power supply as shown in Figure 3A. B, or C. The unit is shipped with shorting links in place for Local sensing. The AC input power is applied via the terminal block. Make sure to connect the AC input Neutral, Line and Ground wires to the respective terminals of the terminal block (see Figure 2). Sensing (either Local or Remote) MUST be used.
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
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LOCAL/REMOTE SENSING: Figure 3 shows proper connection of multiple loads using either remote or local sensing. If local or remote sensing is not configured, the unit will not work properly. The unit is shipped with shorting links in place for Local sensing. For remote sensing, remove the shorting links and connect the +S and –S
terminals to the load. Remote sensing compensation is up
to 0.4V per load wire (0.15V for RKW 3.3-25K, 0.25V for
RKW 5-20K). Transient recovery specs may not be met
when remote sensing is used. If oscillations set off overvoltage protection, install one electrolytic capacitor (470µF
min) between +S and + and one between – and –S terminals.
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V — OPERATION
When output voltage is available, the green LED is on.
The Output Voltage Adjust trimmer (see Figure 2) allows
adjustment of the output voltage within the range specified
in Table 1.
3B). The variable resistance specified in Table 1 must be
substituted for the shorting link between + and +S terminals. Note that load effect for RKW 100W is increased
using this technique, and may exceed values listed above
under STABILIZATION.
SERIES OPERATION: When a number of power supplies are operating in series, the current rating is to be limited to the rating of the power supply with the lowest
rating. A diode (Vr>2 Vo, If>2Io, Vf<< low) must be con-
Σ
nected to the power supply output terminals to protect the
unit from reverse voltage.
FIGURE 2. COMPONENT LOCATIONS
REMOTE VOLTAGE PROGRAMMING: In addition to the integral trimmer, output voltage can be also be adjusted via an external variable resistance (see Figure
PARALLEL OPERATION: Identical units may be operated in parallel for increased current capability. Use either local or remote sensing for all supplies in the parallel group.
FIGURE 3. LOAD CONNECTIONS
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
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FIGURE 4. POWER SUPPLY MOUNTING
FIGURE 5. RKW 100W MECHANICAL OUTLINE DIAGRAM
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
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