Partial discharge measurement is a useful tool to analyze the insulation of high voltage components. However, partial discharges can usually not be measured directly, just the apparent charge of such signals are captured by the measuring instrument. Therefore a calibration of the whole measuring system is required in principle. Hereby short-duration current pulses of known charge magnitude are injected into the system, and by this a scale factor can be calculated for later PD measurements.Adiradh Energy offers a range of calibrators/calibration charge injectors CAL1 series ,CAL2 series,CAL3 series suitable for use in calibrating partial discharge measurements.
calibration impulse generators are unique in that the charge pulse is generated by injecting a variable voltage step (correlated to an internal reference) via a fixed capacitor. This injection capacitor is relatively small, as the step voltage amounts up to 120 V for full range output. Therefore, the calibrators offer excellent impulse properties. Further, calculation of the correction factor is usually not necessary (CI<<CS). The broad range of easy-to-use and robust PD Calibrators for many different applications ensures reliable PD measurements compliant to international standards, such as IEC 60270 and CISPR 18-2. The standard calibrator CAL1A offers the charge range of 1/2/5/10/20/50/100 pC, while the CAL1B, mainly suitable for rotating machinery testing, covers the range of 100/200/500pC/1/2/5/10 nC.For transformer testing Adiradh energy offers four different models: CAL1C, CAL1D, CAL1G, CAL1J all of them being suitable for laboratory and online tests.
Special signal sources are available for GIS and transformer measurements using UHF, such as the CAL2A: 0.5/1/2/5/10/20/50 pC, rise time max. 200 ps, and f3dB min. 1.5 GHz. Three other models are available with voltage output, the CAL2B: 2/5/10/20/30/40/50 V, CAL2C: 1/2/5/7/10/12/15/17/20 V, and CAL2D: 5/7.5/1015/20/30/40; Z = 50 Ω, rise time max. 200 ps, tF = 100 ns. The rise time of the calibrators CAL2B/500, CAL2C/500, and CAL2D/500 is typically 550 ps.
Standard impulse generators of Power Diagnostix’ CAL2 series are listed in the table click this link, along with their ranges and key features
Power Diagnostix offers three different models of calibration impulse generators for RIV measurements: the CAL3A, CAL3B, and CAL3D. They all comply either with NEMA 107‑1987 or CISPR 18-2.All calibrators of the CAL3 series offer the charge range of 10 µV to 10 mV. The amplitude can be set in following steps: 0 µV, 20 µV, 50 µV, 100 µV, 200 µV, 500 µV, 1 mV, 2 mV, 5 mV, 10 mV.A rotary switch on the left side of the calibrator is used to select the signal frequency. The top position ‘0’ selects 600 kHz for the CAL3A. It is increased in steps of 50 kHz up to 1350 kHz. The standard frequency of 1 MHz is selected at lowest position ‘8’. The CAL3B and CAL3D offer a range of 400 kHz to 1900 kHz in steps of 100 kHz.
The standard calibrators of Power Diagnostix’ CAL3 series are listed in the table click this link, along with their ranges and key features.
Adiradh Energy offers PD Calibrators-HF-UHF-RIV-calibration impulse generators -calibration charge injectors CAL1 series ,CAL2 series,CAL3 seriesin India;Hyderabad; Visakhapatnam; Vijayawada;Chennai; Puducherry; Trichy; Coimbatore; Hosur; Bangalore; Hubli; Mysore; Cochin; Kolkata; Pune; Goa; Mumbai; Thane; Kanpur; Jaipur; Nagpur; Delhi; Noida; Gurugam; Bhopal; Vadodara; Ahmedabad; Chandigarh; Chandigarh; Tata Nagar; Raipur; Rudrapur;; Durgapur; Kharagpur; Raigarh; Bhilai;Angul; Haldia; Jabalpur; Indore; Jamshedpur; Rajahmundry; Bokaro Steel City; Salem; Kochi; Rourkela; Ahmedabad ;Jamnagar; Bharuch; Sri City; Nashik; Haridwar; Mathura; Aurangabad; Bhubaneswar and other cities
Brochure for Calibrators-HF-UHF-RIV-calibration impulse generators-calibration charge injectors CAL1 series ,CAL2 series,CAL3 series Download
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