Standard No.:	HG/T 20509-2000
Chinese Name:	化工自控设计规定 (二) 仪表供电设计规定
English Name:	Design code for instrument power supply system
Professional Classification:	P72 Petrochemical and chemical industry engineering
Professional Classification:	HG Professional Standard - Chemistry
Issued by:
Issued on:	2000-11-22
Implemented on:	2001-06-01
Status:	ABOLISHED
Replace:	HG/T20509-2014
Replace By:	HG/T20509-2014
Replace By Date:	2014-10-01
Language:	English
File Format:	PDF
Word Count:	11500 words
Price(USD):	345 (USD)
Delivery:	via email in 1-3 business day

1.0.1 This code is applicable to the power supply design of measuring and control instrument of chemical plant and not applicable to the power supply design of instrument repair workshop.
1.0.2 The relevant standards are as follows:
HG/T 20664 Specification of Power Supply Design Engineering for Chemical Enterprises
HG/T 20636.4 Split of Design Work between Instrumentation and Electricity
GB 50058 Electrical Installations Design Code for Explosive Atmospheres and Fire Hazard
GB 50174 Designing Code for Electronic Computer Room
During the implementation of this code, the provisions of current relevant standards of the Nation shall be satisfied too.

2 Instrument Power Supply Scope, Load Level and Power Supply Type
2.1 Power Supply Scope

2.1.1 Power supply for instrument and automation devices includes the following items:
1 Routine instrument system
2 DCS, PLC and supervisory control computer system, etc.;
3 Automatic analyser;
4 Safety Interlock System (SIS);
5 Industry television system.
2.1.2 Power supply for auxiliary facilities includes the following items:
1 Illumination in instrument panel (cabinet);
2 Electric tracing system of instrument and measuring pipeline
2.1.3 Power supply for other automatic monitoring systems.
2.2 Load level