Generator License

As per the requirements under the Electricity Act, it is mandatory for every owner of the premises to obtain a Generator License from the electrical inspector before the commencement of generator installation process. Tamil Nadu Electrical Inspectorate (TNEI) Department will issue the approval in order to verify the conformity of required technical standards for commissioning the installation. In this article, let us know about the procedure for obtaining generator installation license. Also, read about

TIIC Generator Scheme

Stages in Involved in Generator Installation

The following stages of compliances are involved in the commissioning of generator installation:

Obtaining Load Sanction from the TANGEDCO.
Obtaining No objection certificate from the TANGEDCO, if the proposal involves paralleling of Generator set with TANGEDCO’S grid.
Obtaining Electrical Inspectorate’s approval for the drawing proposal.
Erection and Completion of the Electrical Works based upon the drawings approved by the Electrical Inspectorate.
Submission of Completion Report for works completed.
Rectification of defects pointed out after the inspection and submission of rectification report
Commissioning and Reporting.
Additions and Alterations to the existing installations.

EHV, HV & MV Installation

According to the Indian Electricity Rules, the following are some of the installation types covered:

S.No	Voltage Class	Maximum voltage under normal condition	Variations allowed
1.	Low Voltage (LV)	250 voltage	-6% to +6%
2.	Medium Voltage (MV)	650 voltage	-6% to +6%
3.	High Voltage (HV)	33,000 voltage	-9% to +6%
4.	Extra-High Voltage (EHV)	above 33,000 voltage	12.5% to +10%

Approving Authority

The following are the authority will inspect and approve the installation process:

S.No	Voltage	Concerned Authority
1.	Up to 630 kVA	Electrical Inspector
2.	630 – 2500 kVA	Senior Electrical Inspector
3.	Above 2500 kVA	Chief Electrical Inspector to the Government

Documents Required for MV Generator Installation

The following are the documents required for Medium Voltage (MV) generator installation:

Electrical Contractor's Completion report duly filled in prescribed form.
List of Equipment erected with complete details of the engine, generator, control panel, cable, change over the arrangement, etc.,
Copy of purchase bill for the generator.
No objection Certificate from the premises owner if the EB service connection is not in the name of the applicant.
Photocopy of EB meter card.
Original remittance challan for the Inspection fees paid to a Government.

Documents Required for EHV & HV Installation

The following are the documents required for EHV and HV generator installation:

An authorisation letter collected from the consumer authorising the contractor to correspond with the Electrical Inspectorate.
The drawings should be signed by both the consumer and the Electrical Contractor who performs the installation work.

Note: In addition to the above, the applicant has to submit the documents if required from the (TNEI) Board.

Online Procedure for Approval of Generator Installation

Follow the given steps to register for approval of generation installation: Step 1: The applicant has to log in to the

Single Widow portal. Step 2: In the case of a new user, click on the “Register” button to register as a new user. Step 3: After Registration, Verification page appears automatically, the applicant has to enter OTP received in Email or SMS. Step 4: The required application forms for the approval of electrical installation has to be filled and submitted online. Step 5: In case the application is incomplete, the application will be sent back into the applicant’s account, which will be communicated to the applicant through E-mail & SMS. Step 6: The applicant has to log in to his account and view the comments of the TNEI officer and submit the necessary documents. Step 7: If the application is complete in all respects, “Application accepted” shall be communicated to the applicant. Step 8: The inspector inspects the installation, and the inspection report is uploaded, this information is communicated to the applicant. The applicant has to log in to the respective account and download the inspection report. Step 9: The Compliance report shall be uploaded by the applicant. Step 10: In the case of incomplete Compliance, comments shall be communicated to the applicant. Step 11: The compliance re-submitted by the applicant will be examined by the TNEI officer again. In case it is satisfied on verification, “compliance report accepted” message will be communicated to the applicant. Step 12: The approval for the installation is uploaded by the TNEI officer. This message is communicated to the applicant. Step 13: The applicant can log in to his account and download the drawing approval certificate.

Processing Fee

The fees in respect of testing and inspection vary based upon the equipment and will be notified by the Tamil Nadu Government from time to time.

Processing Time

The entire process will be completed, and the concerned authority of TNEI will approve the installation within five working days from the day of submission of application.

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Frequently Asked Questions

Common questions about Generator License Process in Tamil Nadu: Steps and Compliance.

A generator installation license is a mandatory approval required from the electrical inspector before commencing the generator installation process. It ensures that the installation conforms to the required technical standards and safety regulations.

The key stages include obtaining load sanction and no-objection certificate from TANGEDCO, getting approval for the drawing proposal from the Electrical Inspectorate, completing the electrical works, submitting completion and rectification reports, and finally, commissioning and reporting.

According to the Indian Electricity Rules, installations with voltages ranging from low voltage (up to 250V) to extra-high voltage (above 33,000V) require approval from the Electrical Inspectorate.

For installations up to 630 kVA, the Electrical Inspector approves; for 630-2500 kVA, the Senior Electrical Inspector approves; and for installations above 2500 kVA, the Chief Electrical Inspector to the Government approves.

The documents required include the electrical contractor's completion report, a list of equipment installed, purchase bills, a no-objection certificate from the premises owner (if applicable), and a photocopy of the EB meter card.

Yes, the Tamil Nadu Electrical Inspectorate (TNEI) has an online procedure through the Single Window portal, where applicants can register, submit applications, upload documents, and track the approval process.

According to the article, the entire process will be completed, and the concerned authority of TNEI will approve the installation within five working days from the day of submission of the application.

Yes, there are processing fees involved for testing and inspection, which vary based on the equipment and are notified by the Tamil Nadu Government from time to time.

A no-objection certificate from TANGEDCO is required if the generator installation proposal involves paralleling the generator set with TANGEDCO's grid.

The Electrical Inspectorate's approval for the drawing proposal is a crucial step in the generator installation process, as it verifies the conformity of the proposed installation with the required technical standards.