Where and how to use the
portable earthing As a rule, such systems are used in areas of electrical installations that do not have classical grounding knives. And the principle of their action is that the elements of portable grounding of 10 kV or any other do not allow to pass the voltage, the value of which can be dangerous for a person, beyond the place of its installation.
If a voltage is applied directly to the shorted section, a short circuit occurs automatically. As a result, the voltage at this point drops to zero, and the voltage source that powers the device is automatically turned off. So the portable earthing of ZPL 10 or ZPP 15, in fact, guarantees the safety of personnel dealing with a particular electrical installation.
Portable ground up to 1000V and others: features of the
device If you are going to buy the system under consideration, you should understand what device it has and how it works. It will include:
- special conductors for grounding, as well as shorting the conductive parts of the individual phases of the installation;
- clamps, which allow connecting conductors to conductive parts and to grounding conductors.
Moreover, portable grounding of the RFP or other means that the conductors used in it will be made of a special multi-stranded and flexible bare copper wire. Well, the number of phases in the system will depend directly on the voltage applied to the installation - there are one or three of them.
Basic requirements for portable grounding
If we talk about the basic requirements that should be met by the portable earthing of ZPL 1 or ZPP 1, as well as all other existing options, it is necessary to stop on several points. The main of these requirements will be dynamic and thermal resistance to short-circuit current effects.
The clamps used in the organization of the system must be strong and ensure reliable contact. And remember that the quality of these clamps directly depends on the price of the entire grounding - this is not the parameter on which you can save.
Serious requirements are also imposed on such an indicator as the thermal stability of conductors. Regardless of whether 10 kV portable earthing is used in the system or any other conductors, the conductors must necessarily be resistant to high temperatures. After all, at the moment of short circuit they become very hot. And in order to understand the extent to which these or those conductors meet the requirements imposed on them, the specialists conduct certain tests.
Portable earthing for SIP: what it is and what specificity they have
To improve the reliability of the operation of overhead power lines, SIP systems are widely used today. However, it is important to ensure the safety of all electrical work in the service sector of this system. And therefore, for SIP special earthing is necessary.
They are selected according to certain criteria and must satisfy a variety of requirements. And immediately before the start of use by a specialist, a portable grounding test, chosen to ensure the safety of the SIP on overhead power lines, must be carried out. And it is important to note that in the overwhelming majority of cases the price of portable grounding, purchased by the customer in a particular company, already includes the cost of all test works.
As a conclusion,
Summing up, it can be concluded that if there is no standard zeroing on the equipment or installation, a grounding portable PLDM 1M or PZRU 1N can be used here.
However, in addition to SZRU 1M and PZRU 1H there are other types of portable grounding. And which one to give preference in each case, the specialist should decide. It is only important to remember that before starting the use of grounding, portable FRLs 1 or any others should be tested in a certain way. And the performance of this type of work must also be entrusted to highly qualified professionals.
