ZVCM-1001 ™
Bushing Monitor
Reliable detection of bushing faults—the leading cause of catastrophic transformer failures.
The ZVCM-1001™ online transformer bushing monitor is a robust, FM-certified, permanently installed system. It prevents power outages by continuously measuring leakage currents, power factor, and capacitance. As a core component of ZTZ’s active monitoring ecosystem, the ZVCM-1001 feeds data into our TraMoS software for expert analysis and optimized real time reporting.
- Immediate ROI from decreased insurance costs on actively monitored transformers.
- >95% incipient fault detection rate with the lowest false positive rate in the industry.
- Reduces site visits by approximately 66% in targeted maintenance jobs.
Active transformer bushing monitoring for utility fleets.
Complete diagnostic insight.
A single ZVCM-1001 measures up to six bushings, CTs, CCVTs, breaker bushings, or GIS-to-AIS points at once. Advanced tests—Sum-of-Three, Adjacent Phase, Phase Comparison, and a ZTZ Services patented High-to-Low—gives utilities a full diagnostic view.
Reliable, utility-grade hardware.
Our hardware design eliminates vulnerable connectors at the sensor. All connections are hard-wired, preventing corrosion and long-term maintenance issues. Redundant safety circuits within the sensors limit output voltage, protecting both the equipment and personnel.
Reduced false positives.
If bushing readings go outside set limits, engineers can verify alerts using multiple analytics sources, reducing false alarms and unnecessary truck rolls. The data is AI-ready for seamless integration with internal tools.
ZVCM-1001: decades of built-in engineering experience.
Here are the three key reasons the ZVCM-1001 outperforms every competing solution.
1
Patented algorithms and methods ensure the highest monitored accuracy for any transformer asset.
2
Every ZVCM-1001 bushing monitor includes software use, free support, and a lifetime warranty.
3
Customizable and well-documented options for communications, power supply, alarms, number of bushings, integration of DGA monitoring, and GIC monitoring.
Hardware Specifications
- Power Supply 85–264 VAC, 120–370 VDC, 24 VA
- Operating Temperature Range 85–264 VAC, 120–370 VDC, 24 VA
- Humidity 0 to 95%, non-condensing
- Leakage Current Measurement Range 0 mA to 140 mA
- Leakage Current Accuracy ± 1.5% of reading
- Leakage Current Resolution 0.1 mA
- Power Factor Measurement Range 0% to 100% PF
- Power Factor Resolution 0.01%
- Power Factor Accuracy ± 0.045% of reading
- Capacitance Measurement 100 – 5000 pF
- Capacitance Accuracy ± 1.0% of reading
- Phase Angle of Imbalance Current 0 – 360°
- Phase Angle Accuracy ± 1.0% of reading
- AD Resolution 16 BIT
- Outputs PF, C1, leakage current for each bushing; imbalance for each group of 3 bushings
- Alarm Contact Rating 3 relays, 8.0 amp continuous at 125 VDC; 10.0 amp continuous at 250 VAC
- SCADA Interfaces DNP3.0 Level 1 Protocol via half duplex RS-485; MODBUS
- Surge Withstand / Fast Transient Relay outputs and station battery inputs: ANSI C37.90.1
- EMI Withstand ANSI C37.90.2
- Electrostatic Discharge IEC 801-2
Ready to protect your infrastructure?
Active transformer monitoring transforms data depth from one sample a year to eight samples a day.
- Make informed maintenance decisions and reduce site visits.
- Prolong transformer fleet life.
- Prevent catastrophic transformer failure.
Let’s discuss transformer monitoring solutions tailored to your specific needs and infrastructure. Contact us now and talk to an American engineer at our company.