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KEPCO RTW 300W SERIES Operator's Manual

Rtw 300w series single output, universal input single phase, 0.99 power factor
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OPERATOR'S MANUAL
SINGLE OUTPUT, UNIVERSAL INPUT
SINGLE PHASE, 0.99 POWER FACTOR
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.
©2011, KEPCO, INC
P/N 228-1544R3
KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11355 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102
RTW 300W SERIES

POWER SUPPLY

MODEL
RTW 300W SERIES
POWER SUPPLY MODELS
RTW 3.3-70KC, RTW 5-60KC, RTW 12-25KC,
RTW 15-20KC, RTW 24-13KC, RTW 28-11KC,
RTW 48-6.5KC
email: hq@kepcopower.com ! World Wide Web: http://www.kepcopower.com
KEPCO
THE POWER SUPPLIER™
®

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Summary of Contents for KEPCO RTW 300W SERIES

  • Page 1: Power Supply

    Data subject to change without notice. KEPCO ® ©2011, KEPCO, INC THE POWER SUPPLIER™ P/N 228-1544R3 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...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SECTION PAGE 1. Introduction................................ 1 Scope of Manual............................. 1 Description..............................1 2. Specifications ..............................1 3. Installation ................................. 1 4. Operation................................5 Voltage Adjustment............................7 Remote Voltage Control ..........................7 Remote Turn On-Turn Off..........................7 5. Alarm Functions..............................8 Overvoltage Protection ...........................

  • Page 3: Introduction

    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 RTW 300W Series employs a forward con- verter operating at 140 KHz. Regulation is provided by pulse width modulation. A power stage with a MOSFET on each side of the primary winding, operating in the forward mode provides a smooth isolated d-c output.

  • Page 4: Power Supply Ratings And Specifications

    A limiting resistor in series with a resistor fuse (in parallel with a thyristor circuit) reduces start- up surge. Units are protected against shorts by an input fuse. Fuse value 10.0A at 250 Volts (Littelfuse P/N 0215010.MXF4P, Kepco P/N 541-0144). Input Surge cold start, 15A typ., 20A max.
  • Page 5 TABLE 2. POWER SUPPLY RATINGS AND SPECIFICATIONS (CONTINUED) SPECIFICATION DESCRIPTION Output Hold-up Time 30 mSec typ. (25 mSec typ. for 5V 100V a-c and 15V models), 20 mSec min. 40 mSec typ. (30 mSec typ. for 5V 240V a-c and 15V models), 25 mSec min. Overvoltage Protection When the Power Supply goes into an overvoltage condition, the output is cut OFF.

  • Page 6: Mechanical Outline Drawing Of The Rtw 300W Power Supply (Cover Removed)

    RTW 300W 042111...

  • Page 7: Operation

    FIGURE 2. POWER RATING VS. TEMPERATURE FIGURE 3. MOUNTING POSITIONS FOR THE RTW 300W POWER SUPPLY OPERATION Figure 4 shows the location of all operating controls and input/output terminals followed by an explanation of each. The unit is shipped with a shorting connector installed connecting: +RC to –RC and local sensing cables connecting +DC Output with +S and –DC Output with –S for local sensing.

  • Page 8: Locations Of Operating Controls, Indicators And Terminals

    PIN FUNCTION –PF – – CN2, 3 PIN FUNCTION –S –RC NOTE Unit is shipped with a shorting connector on CN 2 which connects +RC to –RC (see PAR. 4.3) and with local sensing cables installed (connects +DC Output to +S and –DC Output to –S) (see PAR.

  • Page 9: Voltage Adjustment

    TABLE 4. MATING CONNECTORS Connector Connector Socket Housing Contact Number Part Number Part Number Part Number SXH-001T-P0.6 JST (1) B2B-XH-2 XHP-2 SXH-001T-P0.6 CN2, CN3 B5B-XH-2 XHP-5 (1) JST= Japan Solderless Terminal Mfg. Co. VOLTAGE ADJUSTMENT Output voltage can be manually adjusted with the voltage adjustment control, Vadj (see Figure 4). To adjust voltage, first place the unit under an operating load, then monitor the (+)S and (–)S Sense terminals with a precision voltmeter and turn the voltage control to the desired operating value (turn clockwise to increase voltage).

  • Page 10: Alarm Functions

    ALARM FUNCTIONS OVERVOLTAGE PROTECTION When the output voltage of the RTW 300W Power Supply increases beyond the specified values (see Table 1), the output is cut OFF. To restart (reset) the unit, remove, then reconnect AC input power after about 30 seconds; or open and then reclose the RC pins (see PAR. 4.3). CURRENT LIMIT The unit does not shut down if output current exceeds specifications (see Table 1).

  • Page 11: Parallel Connection

    NOTE: To prevent oscillations, install one external electrolytic (do NOT use tantalum) capaci- tor, rated 470µF min. between the (+) and +S terminals and one between the (–) and – S terminals (see Figure 7). FIGURE 7. CORRECT AND INCORRECT METHODS OF LOAD CONNECTION PARALLEL CONNECTION RTW 300W Power Supplies can be connected in parallel (with or without N+1 redundancy).

  • Page 12: 6.3.1 Current Balancing

    6.3.1 CURRENT BALANCING Current balancing (equalization) conditions required for up to four RTW 300W units in parallel are: 1. Output current of each power supply should be within 20 to 90% of the total output current rating. 2. The output voltage of any Power Supply individually must be within 2% maximum of the other power supply output voltage setting.

  • Page 13: 6.3.2.2 Master-Slave, Single Load

    6.3.2.2 MASTER-SLAVE, SINGLE LOAD Figure 10 shows the connection of three power supplies in parallel to a single load. The output voltage of all power supplies is controlled by Vadj of the master. Current balancing is implemented to equalize the load current (see PAR. 6.3.1). Vadj control of all slave units must be set to maxi- mum counterclockwise for this configuration to operate properly.

  • Page 14: Preliminary Electrical Check

    PRELIMINARY ELECTRICAL CHECK Connect an adjustable load across the power supply output terminals, on the top side of the front panel (see Figure 4). The load must have a dissipation rating of at least 300 Watts. Connect a voltmeter and an oscilloscope across the power supply output terminals (should be linked to the respective sensing terminals, +S and –S).
  • Page 15 You must register your product to comply with the terms of the warranty. Either fill out the form below and mail or fax to Kepco, or for rapid on-line registration go to: http://www.kepcopower.com/warranty.htm PRODUCT PURCHASED: REGISTER TO: Model Number)______________________________________ Registered by:________________________________________...
  • Page 16 FOLD HERE Please place stamp here KEPCO, INC. 131-38 SANFORD AVE. FLUSHING, NY 11355 USA CUT HERE...

This manual is also suitable for:

Rtw 3.3-70kcRtw 5-60kcRtw 12-25kcRtw 15-20kcRtw 24-13kcRtw 28-11kc ... Show all

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