Section 17 Testing and trials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 6 Control and Electrical Engineering - Chapter 2 Electrical Engineering - Section 17 Testing and trials

Section 17 Testing and trials

17.1 Testing

17.1.1 The requirements for testing are given in Pt 6, Ch 2, 21.1 Testing of the Rules for Ships, which are to be complied with where applicable. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

17.1.2 For equipment operating at voltages above 15 kV a.c. testing should be in accordance with relevant International or National Standards acceptable to LR and is to be based on approved test schedules.

NOTES
  1. For high voltage cables up to 36 kV a.c., high voltage testing may be carried out in accordance with IEC 60502 (all parts), Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV).
  2. For high voltage cables up to 69 kV a.c., high voltage testing may be carried out in accordance with IEEE Std. 400.2, IEEE Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency (VLF) (less than 1 Hz).

17.1.3 Minimum values of test voltage and insulation resistance are given in Table 2.17.1 Test voltage and minimum insulation, as per IEC 61892- 6:2007, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Section 17.3.

Table 2.17.1 Test voltage and minimum insulation

Rated voltage V Minimum voltageof the tests, V Minimum insulationresistance, MΩ
≤ 400 500 1
400 < ≤ 500 500 + 1
500 < ≤ 1000 1000 + 1
1000 < ≤ 6000 2500 + 1
6000 < U 5000 + 1

17.1.4 When it is desired to make additional high voltage tests on equipment which has already passed its tests, the voltage of such additional tests is to be 80 per cent of the test voltage the equipment has already passed. It is to be ensured that the test voltage is above the operation voltage.

17.2 Trials

17.2.1 The requirements for trials are given in Pt 6, Ch 2, 21.2 Trials of the Rules for Ships, which are to be complied with where applicable. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

17.2.2 For equipment operating at voltages above 15 kV a.c. testing should be in accordance with relevant International or National Standards acceptable to LR and is to be based on approved test schedules.

17.2.3 Minimum values of test voltage and insulation resistance are given in Table 2.17.1 Test voltage and minimum insulation, as per IEC 61892- 6:2007, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Section 17.3.

17.3 High voltage cables

17.3.1 The requirements for high voltage cables are given in Pt 6, Ch 2, 21.3 High voltage cables of the Rules for Ships, which are to be complied with where applicable. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

17.3.2 For equipment operating at voltages above 15 kV a.c. testing should be in accordance with relevant International or National Standards acceptable to LR.

17.4 Hazardous areas

17.4.1 The requirements for testing of electrical equipment located in hazardous areas are given in Pt 6, Ch 2, 21.5 Hazardous areas of the Rules for Ships, which are to be complied with where applicable.

NOTE

For hazardous areas, see Pt 7, Ch 2 Hazardous Areas and Ventilation.


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