GB/T 21056-2007Specification for adjustable speed drive systems of electricity conservation with VF for fans and pumps (English PDF)

1 Scope

This standard specifies the fans, pumps load frequency control energy-saving drive system application conditions, technical requirements, test methods and discrimination and

Evaluation.

This standard applies to 660V and below voltage, 50Hz three-phase AC power supply, motor power 315kW and below the wind

Machine, pump load frequency control power-saving drive system.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 2423.1-2001 Environmental testing for electric and electronic products Part 2. Test methods Test A. Cold (idt IEC 60068-2-1.1990)

GB/T 2423.2-2001 Environmental testing for electric and electronic products Part 2. Test methods Test B. high temperature (idt IEC 60068-2-2.

1974)

GB/T 2423.3 Environmental testing for electric and electronic products Part 2. Test methods - Test Cab. Damp heat test (GB/T 2423.3-2006, IEC 60068-2-78.2001, IDT)

GB/T 2423.21 electric and electronic products environmental testing procedures Test M. Low air pressure test method (GB/T 2423.21-

1991, neqIEC 60068-2-13. 1983)

GB/T 3797 Electric Control Equipment

GB 4943-2001 Safety of information technology equipment (idt IEC 60950.1999)

GB/T 5080.7 Equipment reliability testing efficiency constant failure rate assumption under the MTBF of test plans (GB/T 5080.7-1986, idt IEC 60605-7. 1978)

GB/T 12668.2 speed electric drive systems - Part 2. General requirements for low voltage adjustable frequency ac power drive systems rating

Provisions (GB/T 12668.2-2002, IEC 61800-2.1998, IDT)

GB/T 13466 AC driven fan (pump, air compressor) General economic operation

GB /Z17625.6-2003 electromagnetic compatibility limits rated current greater than 16A devices in low-voltage power supply systems

Harmonic current limit (IEC TR61000-3-4.1998, IDT)

GB/T 17626.4-1998 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient burst immunity test (Idt IEC 61000-4-4.1995)

3 Terms and Definitions

The following terms and definitions apply to this standard.