Testing standards

Tested & Proven at Manitoba Hydro – High Voltage Test Facility

At Coral, quality and reliability are the cornerstones of our engineering philosophy. We are proud to announce that our coils have successfully passed rigorous testing at the world-renowned Manitoba Hydro – High Voltage Test Facility in Winnipeg, Canada. This certification stands as a powerful endorsement of our product’s endurance, insulation integrity and compliance with global standards.

Test Highlights:

Thermal Aging: Our coils underwent 500 thermal cycles ranging from –40°C to +155°C.
Voltage Endurance: The coils were tested at 35 kV RMS (49.5 kV peak), 60 Hz and 100°C for 250 continuous hours.
Diagnostic Evaluations: Comprehensive measurements were conducted before and during testing, including insulation resistance, partial discharge (PD), dissipation factor, capacitance, tap tests and surface resistance.

Standards Compliance:

Testing was conducted in full alignment with globally recognised industry standards:

IEEE 1310-2012: Thermal Evaluation of Insulation Systems for AC Electric Machinery.
IEEE 1043-1996: Voltage Endurance Testing of Form-Wound Bars and Coils.
IEEE 1553-2002: Qualification of Form-Wound Stator Coils.

Testing standards

Quality is our primary factor

The only coil manufacturing company in India to have been certified with ISO 9001:2008, 14001:2004, 18001:2007, Coral coil ensures that quality is a part of our product. We are approved as well for NABL (testing and calibration). With almost 4 decades of experience in this field, we are approved vendors for many government houses, OEMs like GE, SIEMENS, etc.

Coral Coil Policy:

To provide and maintain well designed facilities, good equipment’s, operation and working conditions and set standard for world class Integrated Management Systems.
To satisfy our customer to provide reliable quality product and services through use of prime quality raw material, defined process control at each stage of manufacturing and continuous technology up gradation.
To insist on a quality work environment that supports self-respect, team work, self-motivation and innovation and thus making quality as an inherent characteristic of our organization.
To Emphasis & monitor 3R concept: Reduce, Reuse, Recycle whenever possible in the organization functions.
To proactively assess health & safety risks, environmental and energy impacts and systematically update, document and implement Continual improvement plans.\To provide appropriate training and disseminate information to enable all employees to accept individual responsibility for Quality, Environment, Health and Safety.
To Prevent, eliminate or minimize pollution-generating situations and potential risks that could harm the environment, cause ill health and injury to the occupational health & safety of our personnel & external providers.
To institute and implement a system of regular Quality, Environment and Health & safety audit in order to assure compliance and requirements of laws, regulations and applicable codes of practice.
To monitor, document and communicate Quality, Environment and Health & safety performance in a clear and transparent way to stakeholders and other interested parties.

Standard Test procedures for Coils and Bars

Coral Coil assures the highest quality coils and bars to our customers, in doing so all pieces are tested according to its type and specifications. Additional tests are made according to general requirements and customer’s requests.

Standard tests for Green Coils