In high-voltage laboratories, achieving accurate, repeatable, and IEC-compliant Partial Discharge (PD) measurements is becoming increasingly challenging.
Modern test environments are exposed to significant RFI/EMI, switching spikes, harmonics, and ground noise, all of which overlap the IEC 60270 PD detection band (40–300 kHz).
These disturbances can mask true PD activity, lead to false readings, and compromise the credibility of insulation diagnostics.
To address this challenge, MTEKPRO Technologies Pvt. Ltd. has introduced the BHT Partial Discharge Filter — a high-performance noise-suppression system engineered for HV laboratories, transformer manufacturers, cable test facilities, and advanced PD diagnostic setups. The BHT PD Filter is engineered to remove these disturbances at the source—ensuring clean, stable, and IEC-compliant PD measurements.
Why PD Filters are Critical in HV Testing
Partial Discharge signals exist in the picocoulomb range, making them highly vulnerable to noise such as communication transmitters, switching equipment, VFDs, UPS systems, harmonics, and ground loops. Without proper filtering, noise contaminates the measurement, masking true PD events.
Engineering Architecture of the BHT PD Filter
- Series Inductors (L) – Block high-frequency interference
- Shunt Capacitors (C) – Divert noise to ground
- Electromagnetic Isolation – Break coupling paths
- Frequency – Selective Attenuation Networks.
Available Topologies — T-Filter & π-Filter
- Single – Phase T-Filter
Ideal for transformer, cable, and GIS offline PD testing. Provides strong attenuation of high-frequency disturbances. - Three-Phase π-Filter
Balanced three-phase noise suppression for switchgear, motors, and MV systems.
Applications
- Transformer PD tests
- HV cable PD tests
- GIS offline PD testing
- Bushing, PT/CT, reactor insulation tests
- Motors & generator insulation diagnostics
- OEM and FAT HV laboratories
As high-voltage systems evolve, maintaining clean, noise-free PD measurements is essential for reliable insulation diagnostics. The BHT PD Filter delivers stable, IEC-compliant test conditions, giving HV laboratories and manufacturers the confidence to make accurate, data-driven decisions.
For more information: Email: info@mtekpro.com, Website: www.mtekpro.com
