Kepco Jqe 25-20mvpy-27274 User manual

MODEL

INSTRUCTION MANUAL

IMPORTANT NOTES:

1) This manual is valid for the following Model and associated serial numbers:

MODEL SERIAL NO. REV. NO.

2) A Change Page may be included at the end of the manual. All applicable changes and

revision number changes are documented with reference to the equipment serial num-

bers. Before using this Instruction Manual, check your equipment serial number to identify

your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-

mentation Office in New York, (718) 461-7000, requesting the correct revision for your

particular model and serial number.

3) 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.

Data subject to change without notice.

KEPCO®

THE POWER SUPPLIER™

ORDER NO. REV. NO.

KEPCO, INC. z131-38 SANFORD AVENUE zFLUSHING, NY. 11355 U.S.A. zTEL (718) 461-7000 zFAX (718) 767-1102

email: hq@kepcopower.com zWorld Wide Web: http://www.kepcopower.com

KEPCO INC.

An ISO 9001 Company.

P/N 243-1333-b

JQE 25-20MVPY-27274

POWER SUPPLY

JQE 25-20MVPY-27274

POWER SUPPLY

INSTRUCTION MANUAL

228-1348 DC-COMP/INST 092611 A

Declaration of Conformity

Application of Council directives: 73/23/EEC (LVD)

93/68/EEC (CE mark)

Standard to which Conformity is declared:

EN61010-1:2001 (Safety requirements for electrical equipment for measurement,

control and laboratory use - Part 1)

Manufacturer's Name and Address: KEPCO INC.

131-38 SANFORD AVENUE

FLUSHING, N.Y. 11352 USA

Importer's Name and Address:

Type of Equipment: Component Power Supply

Model No.: [PRODUCT MODEL NUMBER]

Year of Manufacture:

I, the undersigned, declare that the product specified above, when used in conjunction with the condi-

tions of conformance set forth in the product instruction manual, complies with the requirements of the

Low Voltage Directive 73/23/EEC, which forms the basis for application of the CE Mark to this product.

Place: KEPCO Inc.

131-38 Sanford Ave.

Flushing, N.Y.11352 USA

Date:

Saul Kupferberg

(Full Name)

VP OF SALES

(position)

REPRESENTATIVECOPY

B228-1351 COND/CONFORM 092611

Conditions of Conformance

When this product is used in applications governed by the requirements of the EEC, the following restric-

tions and conditions apply:

1. For European applications, requiring compliance to the Low Voltage Directive, 73/23/EEC, this power

supply is considered a component product, designed for “built in“ applications. Because it is incom-

plete in construction, the end product enclosure must provide for compliance to any remaining electri-

cal safety requirements and act as a fire enclosure. (EN61010-1:2001, Cl. 6, Cl. 7, Cl.8, and Cl. 9)

2. This power supply is designed for stationary installation, with mains power applied via a detachable

power supply cord or via direct wiring to the source power terminal block.

3. This power supply is considered a Class 1 (earthed) product. It is intended for use as part of equip-

ment meant for test, measurement and laboratory use, and is designed to operate from single phase,

three wire power systems. This equipment must be installed within a suitably wired equipment rack,

utilizing a three wire (grounded) mains connection. See wiring section of this manual for complete

electrical wiring instructions. (EN61010-1:2001, Cl.6.10.1)

4. This power supply has secondary output circuits that are considered hazardous, and which exceed

180W output power at a potential of 2V or more.

5. The output wiring terminals of this power supply has not been evaluated for field wiring and, therefore,

must be properly configured by the end product manufacturer prior to use.

6. This power supply employs a supplementary circuit protector in the form of a circuit breaker mounted

on the front panel. This circuit breaker protects the power supply itself from damage in the event of a

fault condition. For complete circuit protection of the end product, as well as the building wiring, it is

required that a primary circuit protection device be fitted to the branch circuit wiring. (EN61010-1:2001,

Cl. 9.5)

7. Hazardous voltages are present within this power supply during normal operation. All operator adjust-

ments to the product are made via externally accessible switches, controls and signal lines as speci-

fied within the product operating instructions. There are no user or operator serviceable parts within

the product enclosure. Refer all servicing to qualified and trained Kepco service technicians.

228-1352 SAFETY - (COVER REMOVAL) 092611 C/(D BLANK)

SAFETY INSTRUCTIONS

1. Installation, Operation and Service Precautions

This product is designed for use in accordance with EN 61010-1 and UL 3101 for Installation Category 2,

Pollution Degree 2. Hazardous voltages are present within this product during normal operation. The prod-

uct should never be operated with the cover removed unless equivalent protection of the operator from

accidental contact with hazardous internal voltages is provided:

2. Grounding

This product is a Class 1 device which utilizes protective earthing to ensure operator safety.

3. Electric Shock Hazards

This product outputs hazardous voltage and energy levels as a function of normal operation. Operators

must be trained in its use and exercise caution as well as common sense during use to prevent accidental

shock.

There are no operator serviceable parts or adjustments within the product enclosure.

Refer all servicing to trained service technician.

Source power must be removed from the product prior to performing any servicing.

This product is factory-wired for the nominal a-c mains voltage indicated on the rat-

ing nameplate located adjacent to the source power connection on the product's rear

panel. To reconfigure the product input for other nominal mains voltages as listed

herein, the product must be modified by a trained service technician.

The PROTECTIVE EARTHING CONDUCTOR TERMINAL must be properly con-

nected prior to application of source power to the product (see instructions on instal-

lation herein) in order to ensure safety from electric shock.

PROTECTIVE EARTHING CONDUCTOR TERMINAL - This symbol indicates the

point on the product to which the protective earthing conductor must be attached.

EARTH (GROUND) TERMINAL - This symbol is used to indicate a point which is

connected to the PROTECTIVE EARTHING TERMINAL. The component installer/

assembler must ensure that this point is connected to the PROTECTIVE EARTH-

ING TERMINAL.

CHASSIS TERMINAL -This symbol indicates frame (chassis) connection, which is

supplied as a point of convenience for performance purposes (see instructions on

grounding herein). This is not to be confused with the protective earthing point, and

may not be used in place of it.

This symbol appears adjacent to any external terminals at which hazardous voltage

levels as high as 500V d-c may exist in the course of normal or single fault condi-

tions.

This symbol appears adjacent to any external terminals at which hazardous voltage

levels in excess of 500V d-c may exist in the course of normal or single fault condi-

tions.

27274092611 i

TABLE OF CONTENTS

SECTION PAGE

SECTION 1 - INTRODUCTION

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

1.2 General Description................................................................................................................................. 1-1

1.3 Features. ................................................................................................................................................. 1-1

1.4 Accessories ............................................................................................................................................. 1-2

1.5 Specifications .......................................................................................................................................... 1-2

1.6 Specifications, Mechanical ...................................................................................................................... 1-4

SECTION 2 - INSTALLATION

2.1 Unpacking and Inspection ....................................................................................................................... 2-1

2.2 Terminations............................................................................................................................................ 2-1

2.3 AC Input Requirements ........................................................................................................................... 2-3

2.4 Cooling .................................................................................................................................................... 2-4

2.5 Preliminary Operational Check................................................................................................................ 2-4

2.6 Installation ............................................................................................................................................... 2-5

2.7 Grounding................................................................................................................................................ 2-5

SECTION 3 - OPERATION

3.1 Standard Power Supply Operation, Local Control................................................................................... 3-1

3.1.1 General.............................................................................................................................................. 3-1

3.2 Load Connection ..................................................................................................................................... 3-1

3.2.1 Local Error Sensing ........................................................................................................................... 3-1

3.2.2 Remote Error Sensing ....................................................................................................................... 3-2

3.2.3 Grounded Load Connection............................................................................................................... 3-2

3.3 Output Adjustment................................................................................................................................... 3-3

3.4 Introduction to Remote Programming ..................................................................................................... 3-3

3.4.1 General.............................................................................................................................................. 3-3

3.4.2 Equations Showing the Operation of the Kepco Bridge..................................................................... 3-5

3.5 General Rules for Remote Programming ................................................................................................ 3-6

3.5.1 Grounding.......................................................................................................................................... 3-6

3.5.2 Connections....................................................................................................................................... 3-6

3.5.3 Programming Resistors ..................................................................................................................... 3-6

3.5.4 External Switching ............................................................................................................................. 3-6

3.6 Output Voltage Programming With External Resistance......................................................................... 3-6

3.7 Constant Current Operation .................................................................................................................... 3-7

SECTION 4 - CALIBRATION

4.1 General.................................................................................................................................................... 4-1

4.2 Test Equipment Required........................................................................................................................ 4-1

4.3 Output Voltage Calibration ...................................................................................................................... 4-1

4.3.1 Voltage Pre-calibration Setup ............................................................................................................ 4-1

4.3.2 Zero Output Voltage Calibration ........................................................................................................ 4-2

4.3.2.1 Zero Output Voltage (Local Programming) Calibration................................................................ 4-2

4.3.2.2 Zero Output Voltage (Remote Programming) Calibration............................................................ 4-2

4.3.3 Zero VOLTAGE Monitor Calibration .................................................................................................. 4-2

4.3.4 Zero CURRENT Monitor Calibration.................................................................................................. 4-3

4.3.5 Local Full Scale (FS) Output Voltage Calibration .............................................................................. 4-3

4.3.6 Remote Full Scale (FS) Output Voltage Calibration .......................................................................... 4-3

4.3.7 Full Scale (FS) VOLTAGE Monitor Calibration.................................................................................. 4-3

4.4 Output Current Limit calibration............................................................................................................... 4-4

4.4.1 Current Limit Pre-calibration Setup.................................................................................................... 4-4

4.4.2 Full Scale (maximum) Output Current Limit Calibration .................................................................... 4-4

4.4.3 FS Current Monitor Calibration.......................................................................................................... 4-4

4.4.4 Minimum Output Current Check ........................................................................................................ 4-5

4.5 Overvoltage Protection (OVP) Test and Adjustment............................................................................... 4-5

ii 27274092611

TABLE OF CONTENTS

SECTION PAGE

SECTION 5 - THEORY OF OPERATION

5.1 Simplified Diagram Discussion ............................................................................................................... 5-1

5.2 Circuit Description................................................................................................................................... 5-1

5.2.1 A-C Input Circuit................................................................................................................................ 5-1

5.2.2 Main d-c Supply ................................................................................................................................ 5-3

5.2.3 Pass-Element Section....................................................................................................................... 5-3

5.2.4 Voltage Error Amplifier (VEA) ........................................................................................................... 5-3

5.2.5 Current Limit Circuit (CEA) ............................................................................................................... 5-4

5.2.6 Overvoltage Protection Circuit and Current Monitor ......................................................................... 5-4

5.2.7 Auxiliary Supplies.............................................................................................................................. 5-4

5.2.8 Metering Circuit................................................................................................................................. 5-5

5.2.9 Monitoring Circuit .............................................................................................................................. 5-5

SECTION 6 - MAINTENANCE

6.1 General ................................................................................................................................................... 6-1

6.2 Disassembly/Reassembly....................................................................................................................... 6-1

6.2.1 Cover Removal ................................................................................................................................. 6-1

6.2.2 A1 Circuit Board Removal................................................................................................................. 6-1

6.2.3 A5 Terminal Block Board and CR203 and CR204 Access ............................................................... 6-2

6.2.4 A3 Heat Sink Removal...................................................................................................................... 6-2

6.2.5 A4 Overvoltage Protection Circuit Board Removal ........................................................................... 6-2

6.2.6 Reassembly. ..................................................................................................................................... 6-2

6.3 Troubleshooting ...................................................................................................................................... 6-2

6.4 Power Supply Measurements................................................................................................................. 6-4

6.4.1 Required Test Equipment. ................................................................................................................ 6-4

6.4.2 Measurement Instructions................................................................................................................. 6-5

SECTION 7 - ELECTRICAL PARTS LIST AND DIAGRAMS

7.1 General ................................................................................................................................................... 7-1

7.2 Ordering Information............................................................................................................................... 7-1

7.3 Abbreviations Used in Kepco Parts Lists................................................................................................ 7-2

7.3.1 Reference Designators ..................................................................................................................... 7-2

7.3.2 Descriptive Abbreviations ................................................................................................................. 7-2

LIST OF FIGURES

FIGURE TITLE PAGE

27274092611 iii

1-1 Mechanical Outline Drawing ....................................................................................................................... 1-5

2-1 Front Panel Controls and Indicators, JQE Special Models ......................................................................... 2-1

2-2 Rear Panel Terminations, JQE Special Models .......................................................................................... 2-2

2-3 Location of Internal Adjustments ................................................................................................................ 2-3

2-4 Conversion to 230V AC Line Operation ...................................................................................................... 2-4

3-1 Load Connection Showing a Floating Load ................................................................................................ 3-1

3-2 Grounded Load Connections ...................................................................................................................... 3-2

3-3 Comparison Bridge (Simplified) for Voltage Mode ...................................................................................... 3-4

3-4 Comparison Bridge (Simplified) for Current Mode ...................................................................................... 3-4

3-5 Remote Resistance Programming (Voltage Mode)..................................................................................... 3-7

5-1 JQE Special Power Supply, Simplified Schematic Diagram ....................................................................... 5-2

6-1 A1 PC Board, Reassembly ......................................................................................................................... 6-1

7-1 JQE 25-20MVPY-27274 Power Supply, Component Locations ................................................................. 7-3

7-2 JQE 25-20MVPY-27274 A1 Assembly, Component Locations................................................................... 7-6

7-3 JQE 25-20MVPY-27274 A3 Assembly, Component Locations................................................................... 7-11

7-4 JQE 25-20MVPY-27274 A3A1 Assembly, Component Locations .............................................................. 7-12

7-5 JQE 25-20MVPY-27274 A3A2 Assembly, Component Locations .............................................................. 7-13

7-6 JQE 25-20MVPY-27274 A4 Assembly, Component Locations................................................................... 7-14

7-7 JQE 25-20MVPY-27274, Overall Schematic Diagram................................................................................ 7-17

7-8 Amplifier and Reference Board A1, Schematic Diagram ............................................................................ 7-19

7-9 Overvoltage Protection Board A4, Schematic Diagram .............................................................................. 7-21

iv 27274092611

LIST OF TABLES

TABLE TITLE PAGE

1-1 JQE 25-20MVPY-27274 Specifications ...................................................................................................... 1-2

2-1 Front Panel Controls and Indicator Functions ............................................................................................ 2-1

2-2 Rear Panel Termination Functions ............................................................................................................. 2-2

2-3 Internal Adjustments ................................................................................................................................... 2-3

6-1 Auxiliary Supply Voltages ........................................................................................................................... 6-3