Description
Precision, Reliability, and Safety for HV & EHV Applications
📞 Call/WhatsApp: +254 707 122 122 | 🌐 shopstemaengineering.com
⚙️ Technical Specifications
| Parameter | Value / Range |
|---|---|
| Rated Voltage | Up to 765 kV |
| Insulation Type | Oil-Insulated / SF₆ Gas-Insulated / Dry-Type |
| Frequency | 50 Hz / 60 Hz |
| CT Ratio | Customizable (e.g., 1000/1 A, 2000/1 A, etc.) |
| VT Accuracy Classes | 0.1, 0.2, 0.5, 1.0 (per IEC/ANSI) |
| CT Accuracy Classes | 0.2S, 0.5, 5P, 10P, PR (Protection and Metering) |
| Short Circuit Thermal Rating | Up to 100 kA for 1–3 sec |
| Creepage Distance | IEC / ANSI compliant for pollution levels |
| Standards Compliance | IEC 61869, IEEE C57.13, CSA, AS |
| Mounting | Outdoor vertical/horizontal, pedestal, support |
| Ambient Temperature Range | –40°C to +55°C |
📦 Types of ABB Instrument Transformers
| Model / Series | Type | Voltage Range | Key Use Case |
|---|---|---|---|
| ABB PVA, PVB | Oil-Insulated Voltage Transformer | Up to 765 kV | Metering, relay protection in substations |
| ABB LTB, LVC | Oil-Insulated Current Transformer | Up to 550 kV | High-accuracy current monitoring |
| ABB KE, VIZ | Gas-Insulated CT/VT | Up to 550 kV | Compact GIS integration |
| ABB KOR | Combined CT + VT unit | Up to 245 kV | Space-constrained applications |
| ABB DVMD | Dry-Type Indoor VT/CT | Up to 36 kV | Panel metering, switchgear, industry |
🔑 Key Features
✅ Precision Measurement
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High accuracy metering (class 0.2S/0.5) and protection (class 5P/10P)
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Low burden, minimal phase error for SCADA, energy billing, relay schemes
⚡ High Dielectric Strength
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Hermetically sealed bushings, porcelain/silicone insulators
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Fully type-tested for impulse voltage, lightning strike endurance
🌿 Environmentally Friendly
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SF₆ gas and dry-type options for reduced environmental risk
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Oil containment systems for pollution prevention
🛠️ Maintenance-Free Operation
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Rugged sealed design with minimal moving parts
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Optional online monitoring sensors for digital substations
🌩️ Surge & Transient Protection
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Partial discharge tested
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Built-in surge arrestor options and robust insulation profiles
🧪 Typical Applications
| Sector | Use Case |
|---|---|
| Power Utilities | HV/EHV substations, switchyards, transmission line metering |
| Renewables | Solar farms, wind substations, grid interconnection points |
| Industrials | High-load mining, steel plants, and petrochemical complexes |
| Data Centers | 66/132 kV bulk power input metering and fault isolation |
| Smart Grids | Digital substations with sensor-integrated measurement units |
| Transportation | Railway power control, metro grids, and traction substations |
🆚 ABB vs Competitors (Siemens, Schneider, GE)
| Feature | ABB Instrument Transformers | Others (Avg) |
|---|---|---|
| Voltage Range | Up to 765 kV | Up to 550–765 kV |
| Accuracy (CT/VT) | Up to 0.2S metering, 5P20 relay | Typically 0.5–1.0 |
| Maintenance Requirements | Low / zero maintenance options | Moderate (esp. oil units) |
| Product Variety | CT, VT, combined, gas, dry | Often oil-only |
| Smart Grid Compatibility | High (sensor-ready, SCADA) | Medium |
| Lead Time & Global Support | Fast, global ABB servicing | Varies by region |
🔐 Safety & Certifications
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🔒 Compliant with IEC 61869, IEEE C57.13, CSA, and AS standards
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🔒 Designed for creepage, altitude, and seismic tolerance
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🔒 Fully type-tested for dielectric, thermal, dynamic, and environmental stresses
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🔒 Optional IEC 61850 digital interface for future-ready smart grids
📦 Popular Product Configurations
| Model | Voltage | Current Ratio | Insulation Type | Application |
|---|---|---|---|---|
| ABB LTB-765 | 765 kV | 3000/1 A | Oil | EHV grid transmission line |
| ABB VIZ-420 | 420 kV | – | SF₆ Gas | GIS-based compact substation |
| ABB KE-245 | 245 kV | Combined Unit | Oil + Composite | Rural substation with limited space |
| ABB DVMD-36 | 36 kV | 100/5 A | Dry-type | Industrial switchgear panel |
🛠️ Services by Shop Stema Engineering
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🔍 Transformer sizing, spec matching, & drawings
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🚛 On-site delivery, lifting, and base installation
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🧪 Testing: IR, polarity, ratio, burden, insulation
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🔧 Retrofits & replacements for aging CTs/VTs
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💡 Smart grid integration support and 61850 gateway setup
📞 Request a Quote or Consultation
Need accurate metering and protection up to 765 kV? ABB Instrument Transformers offer industry-leading durability, precision, and safety.
📞 Call/WhatsApp: +254 707 122 122
📧 Email: info@stemaengineering.com
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