Surya
Testing on Clamp Connectors of Power Circuit
Type Tests of Clamp Connectors The tests are performed as per IS: 5561. Type tests are performed on 3 samples of same item Routine Tests on Clamp Connectors Acceptance Tests on Clamp Connectors as per IS: 5561 The number of samples for acceptance tests will be 0.5% (or as the nearest whole number) of the … Read more
Bulk Oil Circuit Breaker – History, Working & Drawbacks
In the early days, less 1910 or the early 20th century, most utilities used a bulk oil circuit breaker (BOCB) for high-voltage switching during that time. Earlier air circuit breakers served the purpose of switching high voltage and very high voltage current. But after the 19th century, engineers realized that mineral oil, or specially treated … Read more
What is Basic Insulation Level (BIL) – A Complete Guidance
Each high-voltage equipment requires adequate insulation to operate safely, reliably, and efficiently. Rated insulation levels indicate the amount of stress the insulation can handle during lightning strikes, sudden electrical surges, or power overloads. The IEC and Indian Standards (IS: 13118) have established clear global rules for these insulation levels to ensure consistent operation. Actually, an … Read more
Ratings of 36kV Outdoor Vacuum Circuit Breaker
Rated Voltage: 36kV Rated Insulation Level:
Testing on Aluminium Bus Pipe
Type Tests of Aluminum Bus Pipe These tests are performed as per IS 5082 (1998). Routine Test of Aluminium Bus Pipe Acceptance Test of Aluminium Bus Pipes The acceptance tests of the aluminium bus pipes will be the same as the routine tests. Only difference is that, acceptance tests can be performed on the selected … Read more
Questions on 33KV Circuit Breaker – A Complete Session
What type of circuit breaker is generally used for the 36KV class? Ans: The 36KV class circuit breaker is normally an outdoor type Vacuum Circuit Breaker (VCB). Why is VCB Preferred in 33KV Outdoor Systems Over SF6 Circuit Breakers? Ans: VCBs offer a more economical approach for 33KV systems compared to SF6 circuit breakers. It … Read more
Testing of ACSR Conductors
Type Tests as per IS 398 Part-5 Routine Tests on ACSR Conductors These tests are performed as per IS 398 Part-5 Acceptance Tests on ACSR Conductors as per IS 398 Part-5
Rogowski Coil CT – A Complete Guide to Theory and Operation
Before discussing the Rogowski Coil CT (Current Transformer), it is essential to understand the basic theory behind it. When current flows through a conductor, it creates a magnetic field around that conductor. If we place a ring-shaped magnetic core around the conductor, the magnetic flux lines concentrate inside the core. When we wrap a copper … Read more
Testing on GSS Earth Wire
Type Tests on GSS Earth Wire All the type tests are performed on a single strand of sampled length. Routine Tests GSS Earth Wire Acceptance Tests of GSS Earth Wire