Pioneering the future of power testing and monitoring
CONFIGURABLE COMPLEX TRANSFORMER MONITORING SYSTEMS
Complete transformer monitoring
Complex Transformer Monitoring Systems
The POWERVIEW Complete remote transformer Scada system is a wireless monitoring system with the following functions:
Voltages currents and power factors monitoring
Optical windings temperature monitoring
Oil Temperature, moisture and DGA
OLTC DGA
Bushings tan delta
PD monitoring
Vibrations monitoring with modeling
Core and insulation leakage currents
The system has fastest fault response time and works in a cloud software available by web based application which analyzes all the electrical tests, other inspections such as visual and thermal and corona inspections. All the data is available on a mobile phone with Android + IOS application.
Single gas DGA monitoring
POWERVIEW ITS ( Immersed tank Sensor ) is a unique wireless monitoring system which has the fastest response time to fault gas as it measures with a sensor which passes through transformer valve and measures directly in the transformer tank where there is natural oil flow due to thermodynamically oil movements or by pumps . It measures Hydrogen which is generally present in all types of fault and is constantly rises as fault progresses, moisture and temperature. The system can be parallelly connected to a SCADA and a web based cloud software which analyzes all the electrical tests, other inspections such as visual and thermal and corona inspections and other types of monitoring for the particular element with most complementary risk assessment. The software is also available on a mobile phone with Android + IOS application. The application has most advanced permissions access and alarms management with notifications (SMS , email).
Multi gas DGA monitoring
Maintenance FREE fully diagnostic DGA monitoring system. This system is fully diagnostic (protects against all faults according CIGRE TB 783) . The system is completely maintenance free (there are no consumables or spare parts) needed to replace on regular basis in its entire lifetime > 15 years . It uses Vaisala NDIR tunable gas detection technology which has guaranteed accuracy with no drift and no recalibration needed. The system measures total gas pressure for sealing indication (N2 and O2 detection). It comes in powerful web based cloud software which analyzes all the electrical tests, other inspections such as visual and thermal and corona inspections and other types of monitoring for the particular element with most complementary risk assessment. The software is also available on a mobile phone with Android + IOS application. The software has most advanced permissions access and alarms management with notifications (SMS, email)
Fault gas Analyzer
The Transformer FGA is fault gas monitoring unit which is designed for smaller transformers to prevent serious faults in the earlier stage , plan outage and replacement and evaluate asset condition It is capable of monitoring hydrogen gas generation, methane generation, moisture and complete fault gas pressure.
The system comes in powerful web based cloud software which analyzes all the electrical tests, other inspections such as visual and thermal and corona inspections and other types of monitoring for the particular element with most complementary risk assessment. The software is also available on a mobile phone with Android + IOS application. The software has most advanced permissions acess and alarms management with notifications ( SMS , email )
PD monitoring
Partial discharges in power transformers are localized electrical discharges that occur within insulation materials, which can weaken the insulation and lead to serious transformer failures. Monitoring and detecting partial discharges is crucial for the health and longevity of power transformers, as they are often early indicators of insulation degradation. These discharges produce pulses of energy and generate electrical noise, which can be identified using specialized sensors and monitoring equipment.
Early detection and continuous monitoring of partial discharges help utilities and operators take preventive actions, such as maintenance or replacement of the affected components, to avoid costly and unplanned transformer failures and ensuring the reliability and efficiency of power transformers in the electrical grid.
Ultra High Frequency (UHF) PD measurement utilizes the 300 Mhz-3 GHz range. In this range partial discharges produce fast electromagnetic impulses that are measured by antenna and a transducer. The UHF method is a non-destructive method for the transformer insulation system condition assessment. This frequency range is the most sensitive to small discharges, also it provides the most data for PD localization. This frequency range has high bandwidth and also is almost fully immune to outside interference.
UHF PD monitoring
Partial discharge (PD) monitoring in power transformers is a critical aspect of their maintenance and reliability. UHF (Ultra-High Frequency) PD monitoring and traditional electrical PD monitoring are two common techniques used to detect and assess PD activity in power transformers.
•UHF PD Monitoring: UHF PD monitoring relies on detecting the electromagnetic emissions generated by PD events in the ultra-high frequency range (typically several hundreds of MHz to several GHz). Antennas or sensors are placed on the transformer to capture these signals.
• Electrical PD Monitoring: Electrical PD monitoring involves measuring the electrical impulses produced by PD events. This method typically uses capacitive or resistive couplers to capture the signals.
Bushing capacitance and tan delta monitoring
Bushing are relatively cheap (comparing to transformer value). Unfortunately, bushings breakdown failure often leads to catastrophic transformer failure like windings deformations. Due to materials imperfection weather conditions and stress bushings are prone to failure. Unfortunately, sometimes that failure escalates very quickly. Historically bushings were tested off-line to measure the capacitance and the dissipation / power factor.
The Bushing BMC Monitor is a permanently installed on-line bushing monitoring system. It continuously measures up to six leakage currents, tests the power factor and capacitance values and monitors the condition of bushings, CCVT`s 1) and free-standing CT`s.
The bushing monitoring system incorporates three measurement modes for standard and two for optional configurations.
Standard configuration with 6 current inputs:
- Sum of three current test
- Adjacent phase reference test
- Phase comparison
Optional configuration with 3 voltage and 3 current inputs:
- Reference test (3 bushings and 3 CCVT`s 1))
Optional configuration with 6 voltage inputs:
- CCVT 1) Reference test (6 CCVT`s 1))
The bushing sensors / adapters are connected to the capacitor taps designed for all types of bushings to allow measurement of the leakage current up to 140 mA AC.
Transformer leakage current monitoring
The POWER VIEW TLCM is permanently installed on the transformer grounding terminal. Monitors real time insulation leakage currents on the grounding terminal. This helps in early detection of all transformer’s insulation problems. Using smart algorithm and additional sensors integrated- the interferences and outdoor discrepancies are eliminated and the sensors measure true insulation leakage current.
The monitoring system is available is available in several configurations starting from 1 phase version, 3 phase version, 6 phase version . All versions are available in various IP protection classes starting from indoor to outdoor IP65 installation. The power supply is 5V DC and it can be either network, solar or battery supply unit. The power consumption is less than 1mA!
OLTC DGA monitoring
The DGA units incipient stage, before they develop into major faults and result in the outage of the transformer. The conventional BUCHHOLZ RELAY is universally used in transformers to protect against severe damages. However, its limitation is that enough gas must be generated first to saturate the oil fully and then to come out or there should be a gas surge to operate this relay. Moreover, Buchholz Relay is never meant to be a diagnostic device for preventive maintenance of transformers.
The Transformer FGA is fault gas monitoring unit which is designed for smaller transformers to prevent serious faults in the earlier stage, plan outage and replacement and evaluate asset condition. It is capable of monitoring hydrogen gas generation, methane generation, moisture and complete fault gas pressure.
The transformer OLTC Fault gas analyzer is state of the art gas analyzer for On load tap changers cpecially developed for measuring large gas concentrations typically present in OLTC. In OLTC Hydrogen (H2) is generated by partial discharges, arcing and in normal service caused by stress from electrical field,
Acetylene (C2 H2) is generated by arcing. Methane (CH4) is generated at higher temperatures though generation starts at relatively low temperature (approx. 150 °C). Ethylene, (C2 H4) is generated by higher temperatures (300 °C and higher). Ethane (C2 H6) is also generated by higher temperatures (300 °C and higher). The system is capable of detecting these types of gases in a large concentrations . It’s web based cloud software analyzes all the electrical tests, other inspections such as visual and thermal and corona inspections and other types of monitoring for the particular element with most complementary risk assessment. The software is also available on a mobile phone with Android + IOS application. The software has most advanced permissions acess and alarms management with notifications ( SMS , email )
Optical Temperature monitoring
The technology used leverages fiber-optic sensors to provide real-time and accurate temperature measurements, overcoming the limitations of traditional methods such as RTDs (Resistance Temperature Detectors) and thermocouples, have limitations in terms of accuracy, sensitivity, and susceptibility to electromagnetic interference.
The Optical Temperature Monitoring technology employs fiber-optic sensors based on the principle of Fiber Bragg Grating (FBG). FBGs are periodic variations in the refractive index of an optical fiber that act as wavelength-specific reflectors. Temperature changes induce strain in the fiber, altering the wavelength of reflected light, which correlates with temperature variations. The sensors are embedded in the transformer winding to provide distributed temperature data along the entire length. Multiple sensors can be multiplexed on a single fiber, enabling comprehensive temperature mapping.
It showcases the benefits gained, such as early fault detection, improved asset management, and enhanced system reliability.
Durable solution for accurate and real-time temperature monitoring of power transformer windings. Its advantages in terms of accuracy, immunity to electromagnetic interference, and distributed temperature sensing make it a valuable tool for ensuring the reliability and longevity of power transformers.
HFCT Transformer Monitoring
POWER VIEW Transformer HFCT sensors are designed to detect high-frequency electromagnetic emissions associated with PD activity in power transformers. These sensors comprise a high-frequency coil wound around the transformer’s grounding strap or core, allowing them to pick up electromagnetic signals induced by PD events. The high sensitivity of HFCT sensors enables the detection of subtle PD activity, even in the presence of significant background noise.
