DOWNLOAD OISD 137

He shall issue Permit only after ensuring that required competent electrical staff, depending upon the specific nature of work, are actually engaged in the work. Partial Discharge testing should be done for equipment having solid insulation and the highest equipment voltage is 7. For critical generators such as for Captive power plants, the frequency of inspection shall be Daily D basis for all items, except for items XIII. Some of the mechanisms which lead to generation of gases due to the chemical decomposition of oil are arcing, partial discharges, low-energy sparking, severe overloading, overheating of the insulation etc. Steps taken to prevent repetition 7. It is recommended that values for each of the key gases be trended over time so that the rate-of-change of the various gas concentrations can be evaluated.

Uploader:	Vuzshura
Date Added:	14 June 2012
File Size:	55.84 Mb
Operating Systems:	Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads:	70770
Price:	Free* [*Free Regsitration Required]

Compliance to these requirements is necessary to prevent: Functionality of Blower fans.

It also goes to prove the old adage that self-regulation is the best regulation. The standby rotary equipment remaining idle for more than 6 months, should additionally be checked fora b c d Free rotation of shaft Proper functioning of space heater circuit Weather protection.

Items v to vii 13 be Shutdown Inspection items. Test voltage is derived from the generator of the earth resistance tester.

OISD-STD-137 Draft - Oil Industry Safety Directorate

The limitations of the clamp-on tester are that it is only effective in situation with multiple grounds in parallel, it cannot be used on isolated grounds, as there is no return path. An increase in the third ousd resistive component of leakage current oidd the arrester to thermal overloading and finally causes breakdown.

Such Tools and devices shall always be maintained in sound and efficient working condition. The test should be performed in a laboratory and ASTM D should be followed for extraction and analysis of the key dissolved gases.

Also, checks shall be made to ensure that the clearances from 1377 structures are maintained to prevent flashover to the structure during lightning. The results shall be judiciously used to enhance life of the equipment and systematic plan for its replacement.

Timely inspection, condition monitoring and preventive maintenance of electrical equipment and its connected systems will go a long way in ensuring safer operations, for a longer period of time, of the electrical installations in the Oil Industry.

Cell voltage, proper cell connections to maintain correct polarity.

ELECTRICAL AUDIT AS PER OISD STD, OISD-STD and OISD-STD AT LALRU LPG 1

Tender Oise Tender Authority: Reference Table for PD Values: Partial Discharge measurement tests can be done either as On-line or Off-lines tests. Both the methods are acceptable in their appropriate application.

Expression of Interests, Pre-Qualification notices, Works concession, Design contest, Subcontract notice, Concession award notice, Prior information notice, Qualification system notice, Periodic indicative notice and Dynamic purchasing system etc. The non-linear voltage-current characteristic of olsd metal-oxide arrester gives rise to harmonics in the leakage current when the arrester is energized with a sinusoidal oids. Control supply availability Provision of fire fighting equipment suitable for electrical fires.

Users of this document are cautioned that no standard can be a substitute for the judgement of responsible and experienced engineer. These documents are intended only to supplement and not replace the prevailing statutory requirements. For competence of the person conducting the tests, Section 3-ii shall be referred.

Key Values

Also, the test procedures used should be designed to ensure that no intentional damage to equipment will result from the testing process.

Steps taken to prevent repetition 7. Paid members will get un-restricted access to billions of dollar public procurement opportunities and can also download free of cost, all tender notices and soft copy of the notices like: The tester induces a known voltage in a loop circuit that includes ground, measures the resultant current flow and calculates the loop resistance.

T The following shall be Onstream Inspection items: It's a community-based project which helps to repair anything. Item vi shall be applicable only for critical high voltage cables. Check enclosures and cable boxes of incomer, bus-coupler and all outgoing feeder for any foreign object, condition of support insulators, phase barriers.

III Preamble Indian petroleum industry is the energy lifeline of the nation and its continuous performance is essential for sovereignty and prosperity of the country. C 11 to 20 Deg. If, however, standby equipment was not energised earlier, all applicable Precommissioning checks, as detailed in Section 9. Cleanliness free from dirt, dust and moisture Insulation resistance before and after connection of the power cables Polarisation Index and Dielectric Absorption tests for critical equipment only Sliprings, brushgear polish and cleanliness of machine winding.