What is test and commissioning?
Testing and commissioning is to be carried out on installations to ensure that they are safe and meet the design requirements. The witnessing of tests on and off site shall be defined by: Design specifications – Mechanical and Electrical. Requirements of the validation process.
What is testing of substation?
Substation Acceptance Testing & Substation Maintenance Testing. New construction acceptance testing and existing substation maintenance testing are primary factors in prolonging the life of your electrical equipment and the ongoing reliability of a utilities service to their customers.
What is testing and commissioning transformer?
The purpose of this test is to determine the insulation resistance of the high-voltage winding to the ground, low-voltage winding to the ground, and the high-voltage winding to the low voltage winding, also to assess the amount of moisture in transformer insulation.
What are the steps used in commissioning of transformers?
Transformer Commissioning Procedure
- 5.2 COMMISSIONING TESTS.
- 5.2. 1 Insulation Resistance (IR)
- 5.2.2 Break-Down Voltage (BDV) Test: Oil samples from tank bottom, tank top, radiator, etc.
- 5.2. 3 Voltage Ratio Test.
- 5.2. 4 Winding Resistance Measurement Test.
- 5.2.
- 5.2.6 Buchholz Relay Test.
- 5.2.7 Temperature Indicator Test.
What is the purpose of testing and commissioning?
All engineering services systems are to be thoroughly commissioned and tested to prove that they are capable of achieving the specified performance, to prove the correct and stable operation of all control systems and are safe to operate and maintain.
Is testing and commissioning the same?
Commissioning is not functional testing. It is a systematic process. Commissioning encompasses everything from OPR/BOD/Design reviews to functional testing and post-occupancy/off season testing.
How do you commission a substation?
The substation commissioning process involves turning on the facility operations, determining what works, identifying any issues and then fixing problems prior to the operation going on-line. Following established standards and proven processes helps ensure a successful utility substation commissioning.
How many types of transformer testing are there?
Transformer manufacturers perform two main types of transformer testing – type test of transformer and routine test of transformer. Some transformer tests are also carried out at the consumer site before commissioning and also periodically in regular and emergency basis throughout its service life.
What commissioning means?
The act of granting authority to someone or something is the act of commissioning. To commission is to charge someone with a task, giving them the authority do to do something in an official way.
Which tests are performed before commissioning of cable?
Baseline Diagnostic Tests:
- Power factor/ dissipation factor (tan delta): Power frequency (50/60 Hz) Very low frequency (VLF)
- DC insulation resistance:
- Off-line partial discharge: Power frequency (50/60 Hz) Very low frequency (VLF)
Which comes first testing or commissioning?
Upon completion of static testing, dynamic testing can be undertaken, this is ‘commissioning’. Commissioning is carried out to prove that the systems operate and perform to the design intent and specification.
What does a continuity tester do?
A continuity tester is an item of electrical test equipment used to determine if an electrical path can be established between two points; that is if an electrical circuit can be made.
What are the requirements of a good substation?
One of the prime requirements of a good substation is that it MUST have regular maintenance. Testing and commissioning procedures are crucial and ensure safety of the operation and maintenance personnel. 1. Power transformers
How are testing and commissioning tests carried out?
Testing and Commissioning Commissioning tests are conducted at site after installation of the equipment in order to ensure that: The equipment will perform its duties in service; Inter-connection with other apparatus is correct; and The test data are provided as records for future maintenance and service work.
What kind of test should I do before commissioning a transformer?
After installation and assembly at site, the following pre-commissioning tests on transformer should be conducted. These are basically low voltage tests. Measurement of magnetizing current and no load losses (3-phase 415V to be supplied on low voltage side of the transformer)
What should be mounted on a HV power transformer?
After installation of transformer on the plinth, accessories viz. radiators, headers, bushings, air blowers, oil pumps with connecting pipes, OLTC drive mechanism and the connecting pipes to diverter switch compartments, marshalling box, etc. have to be mounted on the transformer as per the manufacturers’ drawings.