Primary Current Injection Test Sets are essential for the loading, calibration, and testing of CTs, bimetals, relays, and protection equipment. These sets are typically customized to meet specific customer requirements.
How do they work?
They operate on a duty cycle of 15 minutes on and 30 minutes off, exclusively for testing purposes. The loading transformers are designed for continuous operation to assess temperature rise in bus ducts and bus bars. Optional accessories may include cable terminations, timers, temperature indicators, multiple contactors, and individual phase controls. Moreover, these compact units are available in portable trolley or stationary models, with optional digital or analogue timers, supporting main transformers up to 25,000 amps.
Standard Accessories
Optional Accessories
| Parameters | Description | |
| 1 | I/p Voltage | 380/ 400V Three Phase 50/ 60HZ AC Supply |
| 2 | O/p Current | Up to 25000 A |
| 3 | Capacity | Up to 500 KVA |
| 4 | Duty Cycle | Intermittent or continuous |
| 5 | Control | 1) Manual/motorized control for current variation and push button control. 2) Microprocessor-based complete with an on-board digitized panel. 3) Fully-automatic PLC-based complete with computer, HMI memory, printer etc. |
| 6 | Power Components | 1) Step-down transformer: 3 Nos. A double-wound transformer shall be used for supplying high current and low voltage for testing. 2) Auto Transformer: 3 Nos. Motorized Auto Transformer shall be used for controlling the output voltage from zero to maximum to control the load Current. |
| 7 | Metering | 1) Ampere meter: 3 Nos. Digital Amperemeter shall be provided with 0.5 classes CT to indicate the output current. The size of the amperemeter shall be 96 sq.mm one in case of single phase unit. 2) Voltmeter: Includes a digital voltmeter with selector switch to indicate the output voltage each phase/phase to phase, if required. 3) Line On Indicator: Neon lamp indicators for input indication. 4) Main ON/OFF switch: Three pole ON/OFF is provided for input ON or OFF. |
| 8 | Termination | Output is brought on Copper bus-bars |
| 9 | Control Panel | (i) ON/OFF switch (ii) Separate indication lamps for all three phases in a three phase unit. (iii) Digital Output Ampere meter and Voltmeter with selector switch. (iv) Push buttons for raising and lowering the Output current separately for each phase with change over switch and Push buttons for raising current of all the phases simultaneously |
| 10 | Regulating Transformer | Equipped for motorized operation with limit switches and lifting mechanisms for both the Regulating Transformer and entire unit. Features input/output indicators, 3-phase 4-wire input, and 6″ caster wheels for mobility. Single-phase version: Motorized or manual operation with limit switches. |
| 11 | Step Down Transformer | Air-cooled transformer with DCC primary, bare copper secondary (RYB & N). MS sheet body on angle iron frame. Electrolyte grade copper bus-bar outputs (RYB-N star connected for independent phase use). 6″ wheels for mobility. |
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