KEPCO RKE 1500W User Manual

OPERATOR’S MANUAL

RKE 1500W SERIES

POWER SUPPLY

SINGLE OUTPUT POWER SUPPLIES

SINGLE PHASE, POWER FACTOR CORRECTED

UNIVERSAL AC INPUT

KEPCO INC.

An ISO 9001 Company.

RKE 1500W SERIES

POWER SUPPLY

RKE 24-50K, RKE 36-42K, RKE 48-32K

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.

MODEL

KEPCO®

©2013, KEPCO, INC
P/N 228-1514r5

KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11355 U.S.A. ! TEL [phone] ! FAX [phone]

email: [e-mail] ! World Wide Web: http://www.kepcopower.com

THE POWER SUPPLIER™

TABLE OF CONTENTS

SECTION PAGE

1. Introduction........................................................................................................................................................ 1

1.1 Scope of Manual............................................................................................................................................. 1

1.2 Description...................................................................................................................................................... 1

2. Specifications .................................................................................................................................................... 1

3. Installation ......................................................................................................................................................... 1

4. Operation........................................................................................................................................................... 5

4.1 Voltage Adjustment......................................................................................................................................... 6

4.2 Remote Voltage Control ................................................................................................................................. 6

4.3 Remote Turn On-Turn Off............................................................................................................................... 7

5. Alarm Functions................................................................................................................................................. 7

5.1 POWER FAIL Signal (Optical Coupler Output Alarm Circuit) ......................................................................... 7

5.2 Overvoltage And Overtemperature Protection................................................................................................ 8

5.3 Overcurrent Protection.................................................................................................................................... 8

5.4 Fan Failure...................................................................................................................................................... 9

5.5 Undervoltage .................................................................................................................................................. 9

6. Load Connection ............................................................................................................................................... 9

6.1 Connecting The Load ..................................................................................................................................... 9

6.2 Parallel Connection......................................................................................................................................... 9

6.3 Series Connection ........................................................................................................................................ 11

6.4 Preliminary Electrical Check......................................................................................................................... 11

7. Fan Maintenance............................................................................................................................................. 12

LIST OF FIGURES

FIGURE TITLE PAGE

1 Mounting Positions For The RKE 1500W Power Supply ........................................................................... 1

2 Mechanical Outline Drawing Of The RKE 1500W Power Supply .............................................................. 2

3 Power Rating Vs. Temperature and Input Voltage..................................................................................... 3

4 Locations Of Operating Controls, Indicators and Terminals ...................................................................... 6

5 Connections For Remote Voltage Control ................................................................................................. 7

6 Output Alarm Circuit Optically Isolated ...................................................................................................... 8

7 RKE 1500W Power Failure Timing Diagram.............................................................................................. 8

8 Correct and incorrect Methods of Load Connection................................................................................... 9

9 Parallel Connection with Current Balancing............................................................................................. 10

10 Parallel Connection, Master-Slave, Multiple Loads.................................................................................. 10

11 Parallel Connection, Master-Slave, Single Load...................................................................................... 11

12 Series Connection.................................................................................................................................... 11

13 Functional Checkout ................................................................................................................................ 12

LIST OF TABLES

TABLE TITLE PAGE

1 Output Ratings and Specifications ............................................................................................................. 3

2 Power Supply Ratings and Specifications .................................................................................................. 4

3 Remote Voltage (RV) Adjustment Range ................................................................................................... 7

i RKW 1500W 021913

1. INTRODUCTION

1.1 SCOPE OF MANUAL

This Operator's Manual covers the installation and operation of the Kepco RKE 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 RKE Power Supply.
This information can be found on the nameplate of the unit.

1.2 DESCRIPTION

The Kepco RKE 1500W Series consists of three models of switching power supplies, each with a single
output as shown in Table 1. Units include PFC (power factor correction) at the input and 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). The RKE 1500W Series employs a light weight ferrite core with 135 KHz
switching frequency. Regulation is provided by pulse width modulation. A power stage with two MOS­FETS on each side of the primary winding, operating in the forward mode, provides a smooth isolated
d-c output. A thyristor circuit prevents excessive turn-on current surge. Overvoltage protection and an
isolated remote TTL ON-OFF control are provided. An LED “output voltage ON” light and an output
voltage adjust trimmer are visible below the control terminals (left 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 RKE 1500W Series models. Table 2
contains specifications and operating limits common to all RKE 1500W Series Models. These specifi­cations are at nominal input voltages at 25°C unless otherwise specified.

3. INSTALLATION

See Figure 1 for allowable mounting positions and orientation. See Figure 2 for mechanical outline
dimensions.

FIGURE 1. MOUNTING POSITIONS FOR THE RKE 1500W POWER SUPPLY

RKE 1500W 021913 1

FIGURE 2. MECHANICAL OUTLINE DRAWING OF THE RKE 1500W POWER SUPPLY

2 RKE 1500W 021913

TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS

MODEL RKE 1500W 24-50K 36-42K 48-32K

Output Volts d-c
Adjustment Range (Volts d-c) 16.8-31.2 25.2-55.0 33.6-55.0
Voltage Setting (Volts d-c) 24 ±0.48 36 ±0.48 48 ±0.48

Maximum Output Ratings
(A,W)

(1)

85-90V a-c Input: 30-35A/720-840W N/A 16-19.2A/(768-922W)

85-95V a-c Input: N/A 21-25.2A/756-907W N/A
90-170V a-c Input: 35A/840W N/A N/A
95-170V a-c Input: N/A 25.2A/907W 19.2A/922W

170-265V a-c Input: 50A/1200W 42A/1512A 32A/1536W

Current Limit Setting

(2)

(Amps)

85 - 90V a-c input 31-57.5

90 - 170V a-c input 36-57.5

170 - 265V a-c input 52.5-57.5
Overcurrent Setting (Amps( 55-65 N/A 33.6-36.8
Current Short Circuit (Amps) 70 N/A 45

OVP Setting (Volts)
Low Output Voltage Protection Setting

(5)

14.4V(≤60% V

Efficiency% typical AC Input 100V 83 81 85

AC Input 200V 85 86 88

Ripple & Noise

(6)

(mV, p-p)

ripple 200 300 300

ripple noise 300 400 400

(1) See Figure 3 for power derating vs temperature and input voltage.
(2) Current limit value determined by the combination of input voltage and output voltage setting. For example, if RKE 48-23K is

operated at 120V a-c and output voltage is set at the minimum of output range (33.6V), current limit is closer to the maximum
specified value of 36.8A. For the same input voltage (120Vac) if output voltage is set at maximum (55.0V), then the current
limit value is closer to 20A (the minimum current limit value specified for input voltage range 90-170V a-c).

(3) Winker (intermittent) Operation; after cause is removed, output voltage restored automatically, however for some combina-

tions of input voltage and output voltage and current limit characteristics may be square type: see note (4) below.

(4) Square type. Unit first enters Current Limit; output voltage starts to drop (nearly square curve). If cause is removed while in

Current Limit, output voltage restores automatically. If current continues to increase, Overcurrent is triggered. If Overcurrent
is combined with an output voltage drop below 60% of rated output voltage (below 5V for 36V model), the unit shuts OFF;
recovery is by removing, then reapplying input power after approximately 30 seconds or by opening and (without waiting)
reclosing the RC terminals.

(5) When overvoltage is detected, output is shut OFF. Recovery is by removing, then reapplying input power after approximately

30 seconds or by opening and (without waiting) reclosing the RC terminals.

(6) Ripple and noise levels above are satisfied when conditions are 0 to 100% load, 0 to 65°C (load is derated from 50 to 65°C,

see Figure 3), and bandwidth ≤100MHz.

24V 36V 48V

(3)

(3)

(4)

22.3-48.3
26-48.3

44.1-48.3

(3)

(3)

(4)

17-36.8
20-36.8

33.6-36.8

32-35 56-60 56-60

Onom

)

≤5V

28.8V (≤60% V

(3)

(3)

(4)

Onom

)

24V MODEL

36 V MODEL
48 V MODEL

POWER RATING VS. TEMPERATURE

POWER RATING VS. INPUT VOLTAGE

FIGURE 3. POWER RATING VS. TEMPERATURE AND INPUT VOLTAGE

RKE 1500W 021913 3