Xantrex XKW 8-350 Operating Manual
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Xantrex XKW 8-350 Operating Manual

Xkw 3000 watt series programmable dc power supply
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XKW 3000 Watt Series
Programmable DC
Power Supply
XKW 8-350
XKW 10-300
XKW 12-150
XKW 20-150
XKW 40-75
XKW 55-55
XKW 60-50
XKW 80-37
XKW 150-20
XKW 300-10
Operating Manual
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  • Page 1 XKW 8-350 XKW 10-300 XKW 12-150 XKW 20-150 XKW 40-75 XKW 55-55 XKW 60-50 XKW 80-37 XKW 150-20 XKW 300-10 Operating Manual XKW 3000 Watt Series Programmable DC Power Supply...
  • Page 3 Operating Manual for XKW 3000 Watt Series Programmable DC Power Supply...
  • Page 4 What will Xantrex do? Xantrex will, at its option, repair or replace the defective product free of charge, provided that you notify Xantrex of the product defect within the Warranty Period, and provided that Xantrex through inspection establishes the existence of such a defect and that it is covered by this Limited Warranty.
  • Page 5 Xantrex or its authorized service centers (hereafter “ASCs”);...
  • Page 6 APPLICABLE LAW TO APPLY TO THE PRODUCT SHALL BE LIMITED IN DURATION TO THE PERIOD STIPULATED UNDER THIS LIMITED WARRANTY. IN NO EVENT WILL XANTREX BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSSES, COSTS OR EXPENSES...
  • Page 7 Specifically, please note that this power supply is not intended for use in connection on Use with life support systems and Xantrex makes no warranty or representation in connection with any use of the product for such purposes. Xantrex Technology, Inc.
  • Page 8 Warnings Warnings and cautions are defined and formatted in this manual as shown below. Cautions WARNING Describes a potential hazard which could result in injury or death, or, a procedure which, if not performed correctly, could result in injury or death. CAUTION Describes a procedure which, if not performed correctly, could result in damage to data, equipment, or systems.

  • Page 9: About This Manual

    About This Manual This Operating Manual contains user information for the Series of variable DC output power supplies, available in several voltage models at 3000 Watts. It provides information about features and specifications, installation procedures, and basic functions testing, as well as operating procedures for using both front panel control and remote analog programming functions.
  • Page 10 About This Manual Power Supply Safety Markings Alternating Current Off (Supply) Earth (Ground) Terminal Caution (Hot Surface) Protective Conductor Terminal Caution (Check manual additional information.) On (Supply) Operating Manual for XKW 3kW Series Power Supply viii...

  • Page 11: Table Of Contents

    Contents About This Manual ........... vii List of Figures .
  • Page 12 Controls, Connectors, and Indicators........37 Load Connection .
  • Page 13 Configuring Multiple Supplies for Split Supply Operation....76 Section 4. Introduction ............79 Calibration Calibration Setup .
  • Page 14 Operating Manual for XKW 3kW Series Power Supply...

  • Page 15: List Of Figures

    List of Figures Figure 1.1 Power Supply Front Panel ........19 Figure 1.2 Power Supply Rear Panel .
  • Page 16 List of Figures Figure 3.25 Split Supply Operation of Multiple Supplies ....76 Figure 3.26 Split Supply Operation of Multiple Supplies ....77 Figure 4.1 Calibration Adjustment Locations .
  • Page 17 List of Tables Table 1.1 Available Voltage and Current Ranges ......17 Table 1.2 Electrical Specifications for 8 V to 40 V Models ....21 Table 1.3 Electrical Specifications for 55 V to 300 V Models .
  • Page 18 List of Tables Operating Manual for XKW 3kW Series Power Supply...

  • Page 19: Description

    Section 1. Features and Specifications Description This series of power supplies provides highly stable, variable DC output voltage and current at 3000 Watts of output power. You can select from several remote control choices: standard analog programming, optional isolated programming or readback, and optional GPIB programming or RS-232 control.

  • Page 20: Features And Options

    Features and Specifications Features and Options Features and Options • Simultaneous digital display of both voltage and current. • Ten-turn front panel voltage and current controls for high resolution setting of the output voltage and current from zero to the rated output. •...

  • Page 21: Front Panel Controls

    Features and Specifications Front Panel Controls Front Panel Controls Figure 1.1 to review the controls, LEDs, and meters located on the power supply’s front panel. Check the following sections for additional descriptions of front panel controls and functions. • “Mechanical Specifications” on page 25 •...

  • Page 22: Rear Panel Connectors And Switch

    Features and Specifications Rear Panel Connectors and Switch Rear Panel Connectors and Switch The input AC power, output DC power, as well as the remote program sense and monitor connector are located on the rear panel. The program and monitor function selector switch (SW1) is located internally on the main PCB.

  • Page 23: Specifications

    Features and Specifications Specifications Specifications Electrical These specifications are warranted over a temperature range of 0 °C to 50 °C. Specifications Specifications are subject to change without notice. Table 1.2 Electrical Specifications for 8 V to 40 V Models Models 8-350 10-300 12-250...

  • Page 24: Electrical Specifications For 55 V To 300 V Models

    Features and Specifications Specifications Table 1.3 Electrical Specifications for 55 V to 300 V Models Models 55-55 60-50 80-37 150-20 300-10 Output Ratings: Output Voltage 0-55 V 0-60 V 0-80 V 0-150 V 0-300 V Output Current 0-55 A 0-50 A 0-37 A 0-20 A 0-10 A...

  • Page 25: Additional Specifications

    Features and Specifications Specifications Additional Specifications Rise Time (No Load, Full Load): ~ 30 ms Fall Time (No Load): ~ 1 s Fall Time (Full Load): ~ 50 ms Voltage Mode Transient Response: 1 ms Time Delay from power on until 5 s maximum output stable Measured with stepped 0-10 V analog programming source and a resistive load.

  • Page 26: Remote Programming And Monitoring

    Features and Specifications Specifications Remote Programming Monitoring Remote Start/Stop and Interlock TTL compatible input. Contact Closure, 12-250 Vac or 12-130 Vdc Remote Analog Programming Voltage and current programming: 0-5k resistances; 0-5V, 0-10V sources; 0-1mA sources OVP programming: 0-5V, 0-10V sources Maximum Remote Sense Line Drop 1 V max.

  • Page 27: Mechanical Specifications

    Features and Specifications Specifications Mechanical Specifications Front Panel V and I Control 10-turn voltage and current potentiometers Front Panel Voltage Control 0.02% of V max Resolution Front Panel Voltage and Current 3 or 4 digit LED readouts for each. Meters Table 1.2 Table 1.3 for accuracy.
  • Page 28 Features and Specifications Specifications Operating Manual for XKW 3kW Series Power Supply...

  • Page 29: Introduction

    Section 2. Installation Introduction This section provides recommendations and procedures for inspecting, installing, and testing the power supply. Basic Setup Procedure Table 2.1 for a summary of the basic setup procedure and an overall view of the subsections in Section 2.

  • Page 30: Inspection, Cleaning, And Packaging

    Installation Inspection, Cleaning, and Packaging Inspection, Cleaning, and Packaging Initial When you first receive your unit: Inspection 1. Inspect the unit for scratches and cracks, and for broken switches, connectors, and displays. 2. Have the service technician check the printed circuit board and its components if you suspect internal damage.

  • Page 31: Returning Power Supplies To The Manufacturer

    Returning Power Supplies to the Manufacturer Returning Power Supplies to the Manufacturer Return Before returning a product directly to Xantrex you must obtain a Return Material Material Authorization (RMA) number and the correct factory “Ship To” address. Products must also be shipped prepaid. Product shipments will be refused and returned at your...

  • Page 32: Packaging For Shipping Or Storage

    Installation Returning Power Supplies to the Manufacturer Packaging for Follow these instructions to prepare the unit for shipping or storage. Shipping or 1. When returning the unit or sending it to the service center, attach a tag to the unit Storage stating its model number (available from the front panel label) and its serial number (available from the rear panel label).

  • Page 33: Location, Mounting And Ventilation

    Installation Location, Mounting and Ventilation Location, Mounting and Ventilation Ventilation The power supply may be used in rack mounted or benchtop applications. In either Requirements case, sufficient space must be allowed for cooling air to reach the ventilation inlets in the top and on each side of the unit and for the fan exhaust air to exit from the rear of the unit.

  • Page 34: Ac Input Power

    Installation AC Input Power AC Input Power WARNING There is a potential shock hazard if the power supply chassis and cover are not connected to an electrical ground via the safety ground in the AC input connector. Ensure that the power supply is connected to a grounded AC outlet with the recommended AC input connector configured for the available voltage as described in this section.

  • Page 35: Ac Input Wire Connection

    Installation AC Input Power The AC input cord we recommend is specified in the table below. Add a non-locking plug suitable for use in the country in which you are operating. If you require a special cord, please contact the manufacturer. Wire Size Ratings Cable Outside Diameter...

  • Page 36: Input Line Impedance

    Installation AC Input Power 6. Route the wires inside the cover to prevent pinching. Fasten the AC input cover to the standoffs on the unit using the 6-32 x 2 in. (2) screws, flat washers, and lock washers provided. Figure 2.2 Stripped Wire Installed in Strain Relief Table 2.2 AC Connections for Single and Three Phase Input Phase Ground...

  • Page 37: Functional Tests

    Installation Functional Tests Functional Tests Before connecting the unit to an AC outlet, make sure that the power switch is in the OFF position and that the voltage and current controls are turned fully counter clockwise. Check that the J3 mating connector on the rear of the unit is in place with jumpers connected for local operation as shown below.

  • Page 38: Current Mode Operation

    Installation Functional Tests Current Mode To check current mode operation, proceed as follows: Operation 1. Rotate the VOLTAGE and CURRENT controls fully counterclockwise. 2. Rotate the VOLTAGE control 1/2 turn clockwise. 3. Connect a high current DC ammeter across the rear output terminals, observing correct polarity.

  • Page 39: Controls, Connectors, And Indicators

    Installation Controls, Connectors, and Indicators Controls, Connectors, and Indicators CAUTION All remote programming input and monitoring lines are internally referenced to the supply’s negative output. Do not reference remote programming or monitor lines to the supply’s positive output. J3 pin 6 (ground) is directly connected to the supply’s negative output.

  • Page 40: Load Conductor Ratings

    Installation Load Connection Load As a minimum, load wiring must have a current capacity greater than the output Conductor current rating of the power supply. This ensures that the wiring will not be damaged even if the load is shorted. Table 2.3 shows the maximum current rating, based on Ratings...

  • Page 41: Noise And Impedance Effects

    Installation Load Connection Noise and To minimize noise pickup or radiation, use shielded-twisted pair wiring of as short a Impedance length as possible for load wires. Connect the shield to the chassis via a rear panel mounting screw. Where shielding is impossible or impractical, simply twisting the Effects wires together will offer some noise immunity.

  • Page 42: Figure 2.5 Single Load With Local Sensing (Default)

    Installation Load Connection LOAD LINES USE THE LARGEST GAUGE AND SHORTEST LENGTH POSSIBLE POSITIVE SENSE POSITIVE OUTPUT POSITIVE LOAD TERMINAL TERMINAL OUTPUT RETURN NEGATIVE LOAD TERMINAL TERMINAL RETURN SENSE LOAD POWER SUPPLY Figure 2.5 Single Load with Local Sensing (Default) LOAD LINES USE THE LARGEST GAUGE AND SHORTEST LENGTH...

  • Page 43: Load Connection And Grounding

    Installation Load Connection Load Connection Grounding WARNING Exercise caution when using and servicing power supplies. High energy levels can be stored at the output voltage terminals on all power supplies in normal operation. In addition, potentially lethal voltages exist in the power circuit and the output connector of power supplies which are rated at 40V and over.

  • Page 44: Figure 2.7 Multiple Loads With Local Sensing

    Installation Load Connection LOAD LINES USE THE LARGEST GAUGE AND SHORTEST LENGTH POSSIBLE POSITIVE SENSE POSITIVE OUTPUT POSITIVE LOAD TERMINAL TERMINAL OUTPUT RETURN NEGATIVE LOAD TERMINAL TERMINAL RETURN SENSE LOAD 1 POWER SUPPLY LOAD LINES USE THE LARGEST GAUGE AND SHORTEST LENGTH POSITIVE LOAD POSSIBLE TERMINAL...

  • Page 45: Local And Remote Sensing

    Installation Local and Remote Sensing Local and Remote Sensing Local Units are shipped from the factory configured for local programming mode Programming operation. Mode • Output voltage and current limit settings are adjusted with the front panel Operation controls. • The sense point of the supply is at the output terminals.

  • Page 46: Using Remote Sensing

    Installation Using Remote Sensing 8. Press the STANDBY switch to its OUT position to apply power to the load. Using Remote Sensing CAUTION Do not use remote sensing with multiple supplies connected in series or in parallel. Remote sensing is used during voltage mode operation to shift the power supply's regulation point from its output terminals (default sense point) to the load or distribution terminals by using a separate pair of wires to monitor the load voltage.

  • Page 47: Figure 2.10Connecting Remote Sense Lines

    Installation Using Remote Sensing If the power supply is operated without remote sense lines or local sense • jumpers in place, the supply will continue to work, but supply regulation will be degraded and/or erratic. POWER SUPPLY POWER SUPPLY NEGATIVE POSITIVE OUTPUT OUTPUT...
  • Page 48 Installation Using Remote Sensing Operating Manual for XKW 3kW Series Power Supply...

  • Page 49: Introduction

    Section 3. Operation Introduction All power supplies in this series offer the following features as part of their standard configuration. Feature Reference Remote Programming of Output Voltage and Current Limit with 0-5V, page 54 0-10V, 0-1mA, and 0-5k ohms Overvoltage Protection (OVP) with front panel controls or 0-5V and page 62 0-10V programming Programmable Shutdown with AC, DC, or TTL compatible signals and...

  • Page 50: Configuring For Remote Programming, Sensing, And Monitoring

    Operation Configuring for Remote Programming, Sensing, and Monitoring Configuring for Remote Programming, Sensing, and Monitoring This section lists switch, connector, and jumper functions for the power supply. Subsequently, it provides a location diagram, gives procedures for resetting the internal jumpers and switches, and covers reconfiguring or making connections to the J3 connector.

  • Page 51: Figure 3.1 J3 Program, Sense, And Monitor Connector Description

    Operation Configuring for Remote Programming, Sensing, and Monitoring Figure 3.1 J3 Program, Sense, and Monitor Connector Description Revision A...

  • Page 52: Figure 3.2 Internal Jumpers And Switch (Default Settings Shown)

    Operation Configuring for Remote Programming, Sensing, and Monitoring Internal Switch and Jumpers If you should need to change any of the standard configurations of the supply, internal jumpers JMP1 and JMP2, and switch SW1 enable you to select: • Voltage and Current Programming Scale Factor •...

  • Page 53: Locating Jumpers, Switch, And Connector

    Operation Configuring for Remote Programming, Sensing, and Monitoring Locating Switch SW1 and jumpers JMP1 and JMP2 are located on the main printed circuit Jumpers, board (A2) inside the power supply. “Resetting Jumpers and Switch” on page 51 provides a procedure for removing the power supply cover and changing jumper and Switch, and switch settings.
  • Page 54 Operation Configuring for Remote Programming, Sensing, and Monitoring Dissipating Stored Energy 1. Ensure the power supply is turned OFF. Disconnect the AC input connector. Allow five (5) minutes to elapse to dissipate stored energy before removing the cover. Removing the Cover CAUTION If you should remove the unit's cover, use proper static control techniques to avoid damage to static-sensitive digital components on the printed circuit board.

  • Page 55: Making J3 Connections

    Operation Configuring for Remote Programming, Sensing, and Monitoring 14. Reinstall the jack screws with the nut driver. 15. Reconnect any external cables and connector. Replacing the Cover 16. Place the cover in its original location. 17. Reinstall the eight (8) flathead Philips screws on the top of the cover, then tighten the six (6) Philips screws in the side slots.

  • Page 56: Remote Programming Of Output Voltage And Current Limit

    Operation Remote Programming of Output Voltage and Current Limit Remote Programming of Output Voltage and Current Limit CAUTION The remote programming input is internally referenced to the supply's negative output. Do not connect remote programming input lines (J3 pins 9 and 10) to the supply's positive output.

  • Page 57: Programming Output Voltage And Current Limit With The Rem/Loc Switch

    Operation Remote Programming of Output Voltage and Current Limit Notes for Programming with a 0-10V Source: WARNING Exercise caution when resetting internal jumpers. Follow the procedures for “Resetting Jumpers and Switch” on removing the cover and resetting jumpers in page 51 1.

  • Page 58: Figure 3.4 Programming Output Voltage And Current Limit

    Operation Remote Programming of Output Voltage and Current Limit PROGRAMMING SOURCE PROGRAMMING SOURCE OPTIONS OPTIONS 0-5V 0-5V OUTPUT OUTPUT CURRENT LIMIT VOLTAGE PROGRAMMING PROGRAMMING SOURCE SOURCE 0-1mA 0-1mA 0-10V 0-10V SEE NOTE BELOW SEE NOTE BELOW WHEN USING 0-10V WHEN USING 0-10V PROGRAMMING PROGRAMMING Figure 3.4 Programming Output Voltage and Current Limit...

  • Page 59: Programming Output Voltage

    Operation Remote Programming of Output Voltage and Current Limit Programming Programming Output Voltage with a 0-5Vdc Source Output 1. Remove the jumpers connecting pins 8 to 9 and 20 to 21 on connector J3. Voltage 2. Connect the external programming source between pins 9 (voltage programming input/positive) and 12 (return).

  • Page 60: Figure 3.6 Programming Output Voltage With A 0-10Vdc Source

    Operation Remote Programming of Output Voltage and Current Limit JMP 1 8 7 6 5 4 3 2 1 JMP 2 0 - 10 V Figure 3.6 Programming Output Voltage with a 0-10Vdc Source Programming Output Voltage with a 0-1mA Source 1.

  • Page 61: Programming Output Current Limit

    Operation Remote Programming of Output Voltage and Current Limit Programming Output Voltage with a 0-5k Resistance 1. Remove the jumpers connecting pins 8 to 9 and pins 20 to 21 on connector J3. 2. Connect pins 9 (voltage programming input/positive) and 21 (1 mA current source for voltage control) to the counter-clockwise end of the 5 k potentiometer and connect the tap and clockwise end of the potentiometer to pin 12 (return).

  • Page 62: Figure 3.10Programming Output Current Limit With A 0-10Vdc Source

    Operation Remote Programming of Output Voltage and Current Limit Programming Output Current Limit with a 0-10Vdc Source WARNING Exercise caution when resetting internal jumpers. Follow the procedures for “Configuring for Remote removing the cover and resetting jumpers in Programming, Sensing, and Monitoring” on page 48 1.

  • Page 63: Figure 3.11 Programming Output Current Limit With A 0-1Ma Source

    Operation Remote Programming of Output Voltage and Current Limit Programming Output Current Limit with a 0-1mA Source 1. Remove the jumper between pins 22 and 23 of connector J3. 2. Connect the external programming source between pin 10 (current limit programming input/positive) and pin 12 (return) of connector J3.

  • Page 64: Using Over Voltage Protection (Ovp)

    Operation Using Over Voltage Protection (OVP) Using Over Voltage Protection (OVP) The OVP circuit allows for protection of the load in the event of a remote programming error, an incorrect voltage control adjustment, or a power supply failure. The protection circuit monitors the output voltage and will reduce the output current and voltage to zero whenever a preset voltage limit is exceeded.

  • Page 65: Programming Ovp With An External Voltage Source

    Operation Using Over Voltage Protection (OVP) Programming To set the OVP trip level with a 0-5Vdc or a 0-10Vdc external voltage source: OVP with an 1. Ensure the power supply is turned OFF and that both the AC power source and External the load are disconnected.

  • Page 66: Using Over Temperature Protection (Otp)

    Operation Using Over Temperature Protection (OTP) 8 7 6 5 4 3 2 1 0 - 10 V Figure 3.14Remote Programming of OVP (with a 0-10Vdc External Voltage Source) Using Over Temperature Protection (OTP) The OTP circuit protects the power supply in the event of excessive temperature. The protection circuit monitors the temperature of a supply heatsink using a temperature sensor, and will activate the internal shutdown circuit whenever the maximum temperature is exceeded.

  • Page 67: Using The Shutdown Function

    Operation Using the Shutdown Function Using the Shutdown Function The Shutdown function is used to disable or enable the supply's output voltage and current. It can be used to allow adjustments to be made to either the load or the power supply without shutting off the entire supply.

  • Page 68: Figure 3.15Using Shutdown With A Ttl Compatible (Positive Logic)

    Operation Using the Shutdown Function 3. Set internal switch SW1-8 to select the desired circuit logic as set out in the following table. Table 3.2 Switch Settings for TTL Shutdown Circuit Logic Switch SW1-8 Setting TTL Signal Level Output Condition OPEN (Positive logic) HIGH CLOSED (Negative logic)

  • Page 69: Ac/Dc Shutdown

    Operation Using the Shutdown Function AC/DC Shutdown CAUTION The external voltage applied to J3 connector pins 1 and 2 (Shutdown input and return) cannot exceed 250V rms with respect to the supply’s negative output or the supply may be damaged To activate the Shutdown function using a 12-250Vac input or a 12-130Vdc input: 1.

  • Page 70: Shutdown Application Contact Closure

    Operation Using the Shutdown Function 12-250Vac 8 7 6 5 4 3 2 1 or 12-130Vdc SOURCE AC/DC SOURCE ON = OUTPUT OFF AC/DC SOURCE OFF = OUTPUT ON Figure 3.18Using Shutdown with an AC or DC Input (Negative Logic) Shutdown An external relay, whether normally open or normally closed, may be used to activate the Shutdown circuit.

  • Page 71: Figure 3.19 Using Shutdown With Contact Closure Of A Normally Open Relay

    Operation Using the Shutdown Function Table 3.4 Relay and Switch Settings for Contact Closure Relay Switch SW1-8 Setting Relay Coil State Output Normally Open Relay OPEN (Positive Logic) Energized De-energized CLOSED (Negative Logic) Energized De-energized Normally Closed Relay OPEN (Positive Logic) Energized De-energized CLOSED (Negative Logic)

  • Page 72: Figure 3.20 Using Shutdown With Contact Closure Of An Open Relay

    Operation Using the Shutdown Function OPEN (OFF) JMP2 CLOSED (ON) RELAY COIL ENERGIZED = OUTPUT ON RELAY COIL DE-ENERGIZED = OUTPUT OFF (AS SHOWN) NORMALLY OPEN RELAY Figure 3.20Using Shutdown with Contact Closure of an OPEN Relay (Negative Logic) OPEN (OFF) JMP2 CLOSED (ON) RELAY COIL ENERGIZED = OUTPUT ON...

  • Page 73: Figure 3.22 Using Shutdown With Contact Closure Of A Closed Relay

    Operation Using the Shutdown Function OPEN (OFF) JMP2 CLOSED (ON) RELAY COIL ENERGIZED = OUTPUT OFF RELAY COIL DE-ENERGIZED = OUTPUT ON (AS SHOWN) NORMALLY CLOSED RELAY Figure 3.22Using Shutdown with Contact Closure of a CLOSED Relay (Negative Logic) Revision A...

  • Page 74: Remote Monitoring Of Readback Signals And Status Indicators

    Operation Remote Monitoring of Readback Signals and Status Indicators Remote Monitoring of Readback Signals and Status Indicators Readback Calibrated readback signals for remote monitoring of the output voltage and current Signals are available via connections at the J3 connector on the rear panel. Internal switch SW1 settings allow you to select either a 0-5Vdc or a 0-10Vdc range for the output.

  • Page 75: Using Multiple Supplies

    Operation Using Multiple Supplies Using Multiple Supplies Power supplies of the SAME MODEL in this series may be operated with outputs in series or in parallel to obtain increased load voltage or increased current. Split supply operation allows two positive or a positive and a negative output to be obtained. Configuring Multiple Supplies for...

  • Page 76: Configuring Multiple Supplies For Parallel Operation

    Operation Using Multiple Supplies LOAD LINES USE THE LARGEST GAUGE AND SHORTEST LENGTH POSSIBLE POSITIVE SENSE POSITIVE OUTPUT TERMINAL OUTPUT RETURN TERMINAL RETURN SENSE POSITIVE LOAD POWER SUPPLY 1 TERMINAL NEGATIVE LOAD TERMINAL POSITIVE SENSE POSITIVE OUTPUT LOAD TERMINAL OUTPUT RETURN TERMINAL RETURN SENSE POWER SUPPLY 2...

  • Page 77: Figure 3.24Parallel Operation Of Multiple Supplies

    Operation Using Multiple Supplies Sensing for Parallel Operation Use default local sensing to enhance power sharing between units, as the impedance of the load lines will tend to correct for current imbalance. If you use remote sensing at the load for better voltage regulation, one supply always operates in current limit mode and supplies most of the power.

  • Page 78: Configuring Multiple Supplies For Split Supply Operation

    Operation Using Multiple Supplies Configuring Multiple Supplies for CAUTION Split Supply To prevent possible damage to the supply, do not connect the remote program return Operation line of the negative supply to the common connection. Split supply operation uses two power supplies to obtain two positive voltages with a common ground, or to obtain a positive-negative supply.
  • Page 79 Operation Using Multiple Supplies LOAD LINES USE THE LARGEST GAUGE AND SHORTEST LENGTH POSSIBLE POSITIVE SENSE POSITIVE OUTPUT TERMINAL OUTPUT RETURN TERMINAL RETURN SENSE POSITIVE LOAD TERMINAL POWER SUPPLY 1 COMMON LOAD TERMINAL NEGATIVE LOAD POSITIVE SENSE TERMINAL POSITIVE OUTPUT LOAD TERMINAL OUTPUT RETURN...
  • Page 80 Operation Using Multiple Supplies Operating Manual for XKW 3kW Series Power Supply...

  • Page 81: Introduction

    Section 4. Calibration Introduction WARNING Exercise caution when using and calibrating a power supply. High energy levels can be stored at the output voltage terminals on a power supply in normal operation. In addition, potentially lethal voltages exist in the power circuit and on the output and sense connectors of a power supply with a rated output greater than 40 V.

  • Page 82: Calibration Calibration Setup

    Calibration Calibration Setup CAUTION Follow established antistatic procedures. There are static-sensitive parts on the printed circuit boards. Removing the Cover 1. Unscrew and remove the eight (8) flathead Philips screws from the top of the cover: two (2) are located near the front panel, six (6) near the rear panel. Use a #1 Philips screwdriver.
  • Page 83 Calibration Calibration Setup Figure 4.1 Calibration Adjustment Locations Revision A...

  • Page 84: Calibrating For Programming Accuracy

    Calibration Calibrating for Programming Accuracy Calibrating for Programming Accuracy The offset and range of the voltage and current programming circuits are calibrated for default 0-5Vdc programming signals at the factory. Recalibration may be necessary when you use custom 0-10Vdc programming or when you switch back to 0-5Vdc programming after previously calibrating for 0-10Vdc programming.

  • Page 85: Current Programming Circuit Calibration

    Calibration Calibrating for Programming Accuracy Current Programming Circuit Calibration Table 4.2 Current Programming Calibration Procedures Function & designation Step Action of multiturn trim pots Connect a shunt and DVM to the power supply output. See Note 1. Current Program Offset Apply 1% of program voltage.

  • Page 86: Voltage Readback Calibration

    Calibration Calibrating for Programming Accuracy Voltage The factory calibrates the offset and range of the output voltage and current monitor Readback circuits to within 1% for the default 0-5Vdc scales. Should you need to recalibrate, make adjustments to multiturn potentiometers on the A2 Assembly PCB which you Calibration access by removing the cover of the power supply.

  • Page 87: Current Readback Calibration

    Calibration Calibrating for Programming Accuracy Current Readback Calibration Table 4.4 Current Readback Calibration Function & Designation Step Action of multiturn trim pots Disconnect any load. Connect a shunt and DVM across the power supply output to read the output current. Connect a second DVM to the rear panel J3 output current monitor terminals.

  • Page 88: Battery Charging

    Calibration Battery Charging Battery Charging When using this power supply to charge a battery, take the following precautions to prevent damage to the supply and/or the battery in case the overvoltage protection (OVP) circuit is activated. 1. Select a diode rated to handle the required charging current and voltage. Use the following table as a reference.
  • Page 90 Xantrex Technology Inc. 1 800 670 0707 Tel toll free NA 1 360 925 5097 Tel direct 1 800 994 7828 Fax toll free NA 1 360 925 5143 Fax direct customerservice@xantrex.com www.xantrex.com TM-25OP-01XN Printed in Canada...

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