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reinierliman
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Posted: ‎2021-08-02 08:28 PM

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Posted: ‎2021-08-02 08:28 PM

Perhitungan Tahanan Isolasi

@HelvinHermanT Saya ingin bertanya mengenai perhitungan tahanan isolasi dalam satu gedung. Apakah ada white paper mengenai perlunya menghitung tahanan isolasi tersebut? atau bagaimana cara menghitungnya? Mohon pencerahannya. Terimakasih. 

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HelvinHermanT
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Posted: ‎2021-08-05 08:59 PM . Last Modified: ‎2021-08-06 04:29 AM

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Posted: ‎2021-08-05 08:59 PM . Last Modified: ‎2021-08-06 04:29 AM

Untuk Tahanan Isolasi bisa dilihat di PUIL 2020 SNI 0225-6:2020 Bagian Verifikasi yang diadopsi dari IEC 60364-6 

 

Dalam SNI 0225-6:2020 :

 

6.4.3.3 Resistans insulasi instalasi listrik
Resistans insulasi harus diukur antara:
a) konduktor aktif, dan
b) konduktor aktif dan konduktor proteksi yang dihubungkan ke susunan pembumian.

 

Bila sesuai, selama pengukuran ini konduktor aktif dapat dihubungkan bersama. Dalam praktik, mungkin diperlukan untuk melakukan pengukuran selama pemasangan instalasi sebelum hubungan peralatan.
Bila sirkit mencakup peralatan yang mungkin mempengaruhi hasil atau dapat rusak, hanya pengukuran antara konduktor aktif yang dihubungkan bersama dan bumi yang harus dilakukan.
Resistans insulasi yang diukur dengan voltase uji yang ditunjukkan dalam Tabel 6.1 harus dianggap memuaskan jika panel utama dan setiap sirkit distribusi yang diuji secara terpisah, dengan semua sirkit akhirnya terhubung tapi dengan pemanfaat listrik didiskoneksi, punya resistans insulasi tidak kurang dari nilai yang sesuai yang diberikan dalam Tabel 6.1.

 

Tabel 6.1 Nilai Minimum resistans insulasi.jpg

 

 

Tabel 6.1 harus diterapkan untuk verifikasi resistans insulasi antara konduktor proteksi tidak dibumikan dan bumi.
Sirkit FELV harus diuji pada voltase uji yang sama sebagaimana diterapkan pada sisi primer sumber.
Bila gawai proteksi surja (GPS) atau peralatan lain mungkin akan mempengaruhi uji verifikasi, atau dapat rusak, maka peralatan tersebut harus didiskoneksi sebelum melakukan uji resistans insulasi.
Bila tidak dapat dipraktikkan secara wajar untuk mendiskoneksi peralatan tersebut (misalnya dalam hal kotak kontak magun dilengkapi GPS), voltase uji untuk sirkit khusus tersebut dapat dikurangi hingga 250 V a.s., tapi resistans insulasi harus mempunyai nilai paling sedikit 1 MΩ.
Untuk memfasilitasi pengukuran, konduktor netral didiskoneksi dari terminal pembumian utama.
MOD Karena sistem TN-C dilarang, maka pengukuran tersebut tidak dilakukan.
Nilai resistans insulasi biasanya jauh lebih tinggi dari yang terdapat dalam Tabel 6.1. Bila nilai terukur menunjukkan bukti perbedaan antara sirkit-sirkit, disyaratkan investigasi lebih lanjut untuk mengidentifikasi penyebabnya.

........

 

 

Untuk lebih lengkapnya SNI tersebut bisa didapatkan di https://pesta.bsn.go.id/

 

 

 

Dalam IEC 60364-6 

 

6.4.3.3 Insulation resistance of the electrical installation
The insulation resistance shall be measured between:
a) live conductors, and 
b) live conductors and the protective conductor connected to the earthing arrangement.
Where appropriate during this measurement, live conductors may be connected together. In practice, it may be necessary to carry out this measurement during erection of the installation before the connection of the equipment.
Where the circuit includes equipment that is likely to influence the results or be damaged, only a measurement between the live conductors connected together and earth shall be made.
The insulation resistance measured with the test voltages indicated in Table 6.1 shall be considered satisfactory if the main switchboard and each distribution circuit tested separately, with all its final circuits connected but with current-using equipment disconnected, has an insulation resistance not less than the appropriate value given in Table 6.1.

 

Annotation 2021-08-06 182456.jpg

 

Table 6.1 shall be applied for a verification of the insulation resistance between non-earthed protective conductors and earth.

 

FELV circuits shall be tested at the same test voltage as that applied to the primary side of the source.

 

Where surge protective devices (SPDs) or other equipment are likely to influence the verification test, or be damaged, such equipment shall be disconnected before carrying out the insulation resistance test.

 

Where it is not reasonably practicable to disconnect such equipment (e.g. in case of fixed socket-outlets incorporating an SPD) the test voltage for a particular circuit may be reduced to 250 V d.c. but the insulation resistance shall have a value of at least 1 MΩ.

 

To facilitate measurement, the neutral conductor shall be disconnected from the main earthing terminal (MET).


In TN-C systems, a measurement should be made between the live conductors and the PEN conductor.


Insulation resistance values are usually much higher than those of Table 6.1. When measured values show evident differences between circuits, further investigation to identify the reasons is required.

 

Terima kasih,

 

@reinierliman @HendySE @Anonymous user 

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HelvinHermanT
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Posted: ‎2021-10-31 09:08 PM

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Posted: ‎2021-10-31 09:08 PM

Selamat Siang, @reinierliman 

 

Jika pertanyaan sudah selesai mohon di closed Pak (pilih Solved)

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