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ASHRAE Standard 222 2018

ASHRAE Standard 222 2018

$38.46

ASHRAE Standard 222-2018 Standard Method of Test for Electrical Power Drive Systems

Published By Publication Date Number of Pages
ASHRAE 2018 18
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This standard (a.) establishes uniform methods of testing for determining the performance of premix and postmix chilled-beverage dispensers that are electrically operated and mechanically refrigerated or ice cooled; (b.) defines the terms used in the methods of testing; and (c.) establishes test conditions for rating.

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PDF Pages PDF Title
1 ANSI/ASHRAE Standard 222-2018
3 CONTENTS
4 FOREWORD
1. PURPOSE
2. SCOPE
2.1 The standard is intended for HVAC&R applications that operate from low voltage (£600 V).
2.2 This standard applies to adjustable speed electric alternating current (AC) power drive systems, which combine semiconductor power converters including means for their control, protection, monitoring, and measurement with connected electric motor…
2.3 This standard includes the following:
3. DEFINITIONS
5 3.1 Abbreviations
3.2 Quantity Symbols and Unit Symbols. See Table 1.
4. POWER DRIVE SYSTEM CLASSIFICATIONS
4.1 Power Drive System with a Separate Power Converter (Figure 1). Separate power converters are designed for use with interchangeable motors that users connect with cables. For complete drive module rating programs that use this standard, it is nece…
6 4.2 Power Drive System with an Integral Power Converter (Figure 2). Power drive systems with power converters that are completely integrated in motor casings are not safely separable by users in the HVAC&R field. This standard does not support electr…
Table 1 Quantity Symbols and Unit Symbols
5. GENERAL REQUIREMENTS
5.1 General Test Requirements
5.2 Test Instruments
7 Figure 1 Remote complete drive module (CDM) test setup.
8 Figure 2 Attached complete drive module (CDM) test setup. (Test points P3 and P4 are not used.)
9 5.3 Test Conditions. The test plan shall itemize the test conditions. These conditions originate from the following:
5.4 Power Source Requirements. The power source shall meet the following requirements:
6. INSTALLATION AND OPERATION
6.1 Installation. The power drive system shall be installed and operated per manufacturers’ installation and operation manuals with modifications as required by this standard.
6.2 Motor Conductor Length. The lengths of the conductors between the complete drive module and motor have a significant effect on motor insulation stress, in terms of both peak voltage and voltage rise time.
6.3 Instrumentation Application and Location. Instrumentation shall be applied as shown in Figures 1a and 1b, respectively.
6.4 Complete Drive Module Settings. The test plan shall provide a text description or schematic diagram sufficient to define the configured state of all complete drive module hardware and software settings used to achieve the test conditions, whether…
7. TEST PROCEDURE
7.1 Test Sequence
7.2 Measurements. Data shall be recorded during the tests as listed in Table 2.
8. CALCULATIONS
8.1 Adjustment for Bias Errors. Mean bias errors, if any, shall be subtracted from the measured values to remove offsets from true values. A positive mean bias error means that the measured value is greater than the true value, so the bias error is s…
8.2 Total Harmonic Current Distortion THDi
10 Table 2 Measurement Locations and Data to be Recorded During the Tests
8.3 Total Harmonic Voltage Distortion THDv
8.4 Motor Output Power Po (Informative Note: See Informative Appendix C for derivations of the motor output power equations.)
8.5 Drive System Efficiency hsys
11 9. TEST REPORT
10. NORMATIVE REFERENCES
12 INFORMATIVE APPENDIX A—ILLUSTRATION OF A PULSE-WIDTH-MODLUATION (PWM) VOLTAGE PULSE AT A MOTOR’S INPUT TERMINALS
Figure A-1 Measurement of a PWM voltage pulse at the motor input terminals to determine the motor stress.
13 INFORMATIVE APPENDIX B—CALCULATING SOURCE IMPEDANCE
14 INFORMATIVE APPENDIX C—DERIVATION OF MOTOR OUTPUT POWER EQUATIONS
15 INFORMATIVE APPENDIX D—INFORMATIVE REFERENCES

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ASHRAE Standard 222 2018
$38.46