| Quantity: | |
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420240 420249 420258 420243 420252 420261 420246 420255
Hypertherm
Introduction
This section describes practices for grounding and shielding to protect a plasma cutting system against radio frequency interference (RFI) and electromagnetic interference (EMI) (also called noise). It also describes the DC power ground and the service ground. The diagram at the end of this section shows these types of grounds in a plasma cutting system. 2
The grounding practices in this section have been used on many installations with excellent results, and recommends that these practices be a routine part of the installation process. The actual methods used to implement these practices may vary from system to system, but should remain as consistent as possible. However, due to the variation in equipment and installations, these grounding practices may not succeed in every case to eliminate RFI/EMI noise issues.
Types of grounding
Service ground (also called safety ground or potential earth (PE) ground) is the grounding system that applies to the incoming line voltage. It prevents a shock hazard to any personnel from any of the equipment or the cutting table. It includes the service ground coming into the plasma system and other systems, such as the CNC and the motor drives, as well as the supplemental ground rod connected to the cutting table. In the plasma circuits, the ground is carried from the plasma system chassis to the chassis of each separate console through the interconnecting cables.
DC power ground (also called cutting current ground) is the grounding system that completes the path of the cutting current from the torch back to the plasma system. It requires that the positive lead from the plasma system be firmly connected to the cutting table ground bus with a properly sized cable. It also requires that the slats, on which the workpiece rests, make firm contact with the table and the workpiece.
RFI and EMI grounding and shielding is the grounding system that limits the amount of electrical noise emitted by the plasma and motor drive systems. It also limits the amount of noise that is received by the CNC and other control and measurement circuits. The grounding practices described in this section mainly target RFI and EMI grounding and shielding.
Swirl Ring 420406
Swirl Ring 420233
Swirl Ring 420242
Swirl Ring 420260
Hypertherm Plasma Cutter Parts Electrode Nozzle Shield 420240 420249 420258 420243 420252 420261 420246 420255 for XPR300
Introduction
This section describes practices for grounding and shielding to protect a plasma cutting system against radio frequency interference (RFI) and electromagnetic interference (EMI) (also called noise). It also describes the DC power ground and the service ground. The diagram at the end of this section shows these types of grounds in a plasma cutting system. 2
The grounding practices in this section have been used on many installations with excellent results, and recommends that these practices be a routine part of the installation process. The actual methods used to implement these practices may vary from system to system, but should remain as consistent as possible. However, due to the variation in equipment and installations, these grounding practices may not succeed in every case to eliminate RFI/EMI noise issues.
Types of grounding
Service ground (also called safety ground or potential earth (PE) ground) is the grounding system that applies to the incoming line voltage. It prevents a shock hazard to any personnel from any of the equipment or the cutting table. It includes the service ground coming into the plasma system and other systems, such as the CNC and the motor drives, as well as the supplemental ground rod connected to the cutting table. In the plasma circuits, the ground is carried from the plasma system chassis to the chassis of each separate console through the interconnecting cables.
DC power ground (also called cutting current ground) is the grounding system that completes the path of the cutting current from the torch back to the plasma system. It requires that the positive lead from the plasma system be firmly connected to the cutting table ground bus with a properly sized cable. It also requires that the slats, on which the workpiece rests, make firm contact with the table and the workpiece.
RFI and EMI grounding and shielding is the grounding system that limits the amount of electrical noise emitted by the plasma and motor drive systems. It also limits the amount of noise that is received by the CNC and other control and measurement circuits. The grounding practices described in this section mainly target RFI and EMI grounding and shielding.
Swirl Ring 420406
Swirl Ring 420233
Swirl Ring 420242
Swirl Ring 420260
Hypertherm Plasma Cutter Parts Electrode Nozzle Shield 420240 420249 420258 420243 420252 420261 420246 420255 for XPR300