How to ground pumps in the chemical processing area
Thread Content
Dear Haihao friends: I would like to ask how to ground the feeding pumps in the chemical processing area (mainly the recycling area and tank area) Many experts who came to the site said that grounding is required on the pump, as well as at the base of the pump. I’m not sure if that’s indeed the case Are there any relevant standards? If the pump is three-phase and has a ground wire, does it still need to be grounded?
The pump and the base should be connected together with a grounding wire; grounding the base is also acceptable. The important thing is to verify that the grounding is proper
The enclosure of electric motors shall be grounded in accordance with GB 50169-2006, Code for Construction and Acceptance of Grounding Installations in Electrical Installations. 3.1.1 The following metal parts of electrical installations must be grounded or connected to the neutral wire (mandatory requirement): 1 The metal bases or enclosures of motors, transformers, electrical appliances, and portable or mobile electrical equipment； 5 The metal enclosures of junction boxes, terminal fittings, and expanders for AC and DC power cables, as well as the accessible metal protective layers of the cables and the steel pipes used for passing wires through them. Where there are metal hoses used as transitions between the steel pipes through which the wires pass, or between those steel pipes and electrical equipment, it is necessary to ensure that the metal hose sections are properly grounded ；
It can be connected to the building’s grounding grid; if a separate grounding electrode is to be used, refer to page 97–99 of the catalog 08D800-8, Electrical Design and Construction for Civil Buildings – Lightning Protection and Grounding, at http://bbs.hcbbs.com/thread-1595498-1-1.html
It seems that my response, based on on-site experience, is incorrect; please ask the original poster to delete my reply to avoid misleading others!
The grounding of the motor’s enclosure is explicitly specified in the \"GB 50169-2006 Code for Construction and Acceptance of Grounding Systems in Electrical Installation Works.\" According to 3.1.1, the following metal parts of electrical installations must be grounded or connected to the neutral wire: 1) the metal bases or enclosures of motors, transformers, electrical appliances, and portable or mobile electrical devices； 5 The metal enclosures of junction boxes, terminal fittings, and expanders for AC and DC power cables, as well as the accessible metal protective layers of the cables and the steel pipes used for passing wires through them. Where there are metal hoses used as transitions between the steel pipes through which the wires pass, or between those steel pipes and electrical equipment, it is necessary to ensure that the metal hose sections are properly grounded
Both the motor and the pump body need to be grounded
Drive stakes 2-3 meters deep using angle iron, ground the wires, and then measure the current
Corrosion inhibitors and metering pump issues in hydrocracking units