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ABB TVOC-2 Transformer Oil & Condition Monitor
Model: TVOC-2
4-hour response · Pricing in SAR · Delivery across all KSA regions
TVOC-2 — ABB TVOC-2 Transformer Oil & Condition Monitor
The ABB TVOC-2 is an online dissolved gas analysis (DGA) monitor for power transformers, continuously measuring the nine key fault gases dissolved in transformer mineral oil to detect incipient thermal and electrical faults before they escalate to catastrophic transformer failure. Using photoacoustic spectroscopy — the most accurate and sensitive measurement principle for dissolved gas detection — the TVOC-2 measures hydrogen (H₂), methane (CH₄), ethylene (C₂H₄), ethane (C₂H₆), acetylene (C₂H₂), carbon monoxide (CO), carbon dioxide (CO₂), nitrogen (N₂), and oxygen (O₂) at parts-per-million sensitivity, covering the complete Duval triangle gas set and the IEC 60599 fault diagnosis gas ratios. The built-in intelligence applies Duval triangle analysis, Rogers ratios, and IEC 60599 concentration limit comparisons automatically, generating fault type diagnosis (paper degradation, hot spot, partial discharge, arcing) and alarm prioritisation without requiring the operator to perform manual calculations.
The technical case for online DGA monitoring is compelling in Saudi Arabia's power infrastructure. A single 33/11 kV or 132/33 kV power transformer at a critical substation represents a capital asset value of SAR 2–15 million and a strategic supply reliability risk that traditional periodic oil sampling (typically annual or semi-annual) cannot adequately manage. The TVOC-2 samples every 1 to 24 hours (configurable), providing a near-real-time window into transformer condition that detects the gradual gas generation characteristic of paper insulation degradation and winding hotspot development over weeks and months before the fault temperature reaches explosive gas generation rates. The ATEX Zone 1 certification and -20°C to +60°C operating range allow installation directly on transformer bodies at outdoor substations across Saudi Arabia's varied climates, from coastal Jeddah humidity to the arid Eastern Province summer heat.
In Saudi Arabia, the TVOC-2 is deployed on high-value transmission and industrial transformers across SEC's 380 kV and 132 kV transmission network, ARAMCO's crude oil processing facility main transformers, and SABIC's polymerisation plant generator transformers where an unplanned outage carries production loss costs far exceeding the transformer replacement value. The Saudi Electricity and Cogeneration Regulatory Authority (ECRA) is increasingly encouraging condition-based maintenance programs for critical grid assets as part of the grid reliability improvement mandate under Vision 2030, and the TVOC-2 provides the continuous online data stream required to transition from time-based to condition-based transformer maintenance. King Abdullah University of Science and Technology (KAUST) and KACST research centres use TVOC-2 systems in transformer research programs studying insulation degradation under Saudi Arabia's specific high-ambient loading conditions.
Razz Middle East supplies TVOC-2 systems with full commissioning, Modbus/IEC 61850 integration to substation SCADA, alarm threshold configuration based on IEC 60599 reference limits, and operator training. We provide ongoing technical support and calibration services, and can integrate TVOC-2 data into ABB Ability cloud analytics for multi-transformer fleet monitoring across geographically distributed substations.
Technical Specifications
Full specifications for the TVOC-2
- Gases Measured
- H₂, CO, CO₂, CH₄, C₂H₂, C₂H₄, C₂H₆, N₂, O₂ (9 gases)
- Measurement Principle
- Photoacoustic spectroscopy
- Sensitivity
- 1–2 ppm (gas dependent)
- Sampling Interval
- Configurable 1–24 hours
- Diagnosis
- Duval triangle + IEC 60599 + Rogers ratios
- Communication
- Modbus RTU, PROFIBUS DP, IEC 61850
- Alarm Levels
- 3 configurable thresholds per gas
- Operating Temp
- -20 to +60°C
- Certification
- CE, ATEX Zone 1
- Display
- Local LCD with remote web HMI
Key Features & Benefits
- Photoacoustic spectroscopy measurement principle provides ppm-level sensitivity across all 9 IEC 60599 fault gases simultaneously, enabling Duval triangle and Rogers ratio fault diagnosis without manual laboratory oil sampling or external gas chromatograph equipment.
- Continuous sampling every 1–24 hours (configurable) provides near-real-time visibility of transformer gas generation trends, detecting the gradual increase characteristic of paper insulation aging and winding hotspot development weeks before critical gas levels are reached.
- Built-in Duval triangle, Rogers ratio, and IEC 60599 concentration limit analysis generates automatic fault type diagnosis (thermal fault, partial discharge, arcing) and prioritised alarm outputs, without requiring specialist DGA interpretation by the operations team.
- ATEX Zone 1 certification and -20°C to +60°C operating range allows direct installation on transformer bodies at outdoor substations across Saudi Arabia's climate range, from coastal humidity to desert summer temperatures above 50°C.
- IEC 61850 communication with GOOSE alarm messaging enables direct integration into modern digital substation automation platforms, reporting transformer gas alarm events as IEC 61850 datasets to the substation protection and control IED.
- Three configurable alarm thresholds per gas (advisory, alarm, emergency) with independent relay outputs allow hierarchical alert escalation from email notification to automatic transformer de-loading or disconnection based on gas level severity.
- Web-based HMI accessible over Ethernet allows remote review of transformer gas trends, alarm history, and Duval triangle status without site visit, enabling centralised monitoring of multiple transformers from SEC regional control centres.
Industrial Applications in Saudi Arabia
- High-value 33/11 kV and 132/33 kV distribution transformers at SEC's critical urban substations in Riyadh, Jeddah, and the Eastern Province, where ECRA grid reliability requirements justify continuous condition monitoring to prevent unplanned outages.
- ARAMCO crude oil processing facility main transformers at GOSPs and refineries, where an unplanned transformer failure causes production losses measured in millions of SAR per hour, making continuous DGA monitoring economically essential.
- SABIC polymerisation and petrochemical plant generator transformers at Jubail Industrial City, where transformer condition data is integrated into the plant's DCS asset management system for condition-based maintenance scheduling.
- Generator step-up transformers at SEC's combined cycle and gas turbine power stations, where online DGA monitoring supplements periodic oil sampling to detect inter-turn faults and bushing degradation between planned maintenance outages.
- Strategic reserve transformers and spare transformer assets in SEC's transformer management program, where periodic online monitoring during storage verifies transformer condition before energisation at a new substation location.
- NEOM utility infrastructure transformers in the high-voltage distribution network, where ABB Ability cloud integration of TVOC-2 data enables the smart grid's predictive asset management algorithm to schedule transformer maintenance before condition degradation reaches critical levels.
- Offshore platform power transformers in ARAMCO's offshore field installations, where the ATEX Zone 1 certification and sealed IP-rated enclosure allow installation in classified hazardous areas without additional protection measures.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — TVOC-2
Common questions from buyers in Saudi Arabia and the GCC