Emek HV current transformers and HV adapt solutions enable utilities and industrial operators to monitor high voltage circuits with precision while maintaining robust isolation and safety. These devices translate primary currents into standardized signals that support protection, metering, and automation in demanding environments.
Designed for demanding transmission and distribution applications, the Emek HV platform integrates advanced core materials, compact housings, and flexible secondary interfaces. The result is a reliable bridge between high voltage equipment and control systems, minimizing measurement error and supporting compliance with modern grid codes.
Key Specifications at a Glance
| Parameter | Typical Value | Options Range | Notes |
|---|---|---|---|
| Primary Voltage | 72.5 kV to 252 kV | Up to 800 kV | System compatible with ANSI and IEC classes |
| Primary Current | 100 A to 3000 A | Custom ratios available | Standard ratios include 1000:1 and 2000:1 |
| Output Current | 1 A or 5 A | Optional 0–20 mA for direct interfacing | Matches relay and metering inputs |
| Accuracy Class | 0.1S for metering, 5P to 10P for protection | 0.2S available on request | Meases error within specified limits up to rated burden |
| Insulation Level | 1 minute 185 kV rms, 550 kV lightning impulse | Enhanced creepage and clearance distances | Suitable for polluted and high humidity sites |
High Voltage Insulation and Safety Design
Emek HV current transformers feature reinforced primary insulation, solid cast bushings, and optimized internal clearances to withstand system overvoltages. The use of moisture-resistant materials limits degradation in harsh environments, supporting long service life and reducing unplanned outages.
Safety is embedded in the design through grounded enclosures, visible disconnect provisions, and partial discharge-free construction. Compliance with IEC 60044-1 and related standards ensures predictable behavior during transient conditions, protecting both equipment and personnel.
Metering Accuracy and Wide Range Operation
Meeting modern grid codes, Emek HV current transformers deliver low phase and ratio errors across a broad load range. They maintain declared accuracy from light loads associated with idle conditions to high loads during peak demand periods, enabling precise billing and reliable grid control.
Temperature drift and long-term stability are controlled through stabilized core formulations and precision winding techniques. This reduces the need for frequent recalibration and supports accurate energy accounting in billing systems.
Adapt Solutions for Retrofit and Modular Upgrades
HV adapt solutions from Emek facilitate seamless integration with existing switchgear, CT panels, and digital protection devices. By offering standardized mounting footprints and flexible terminal arrangements, they simplify retrofits without requiring major cabinet modifications.
Each adapt unit includes configurable taps and interface options that match site-specific requirements. This modular approach lowers engineering effort, shortens commissioning time, and supports phased modernization programs.
Robust Performance in Harsh Environments
Engineered for outdoor substations and heavy industrial sites, Emek HV current transformers resist contamination, moisture, and wide temperature swings. Hermetic sealing and corrosion-resistant hardware protect internal components, minimizing maintenance frequency and enhancing availability.
Dynamic performance under fault conditions remains consistent, with controlled error growth during short-circuit events. This behavior helps upstream protection devices operate correctly and limits stress on connected equipment.
Implementation Recommendations for Grid Operators
- Verify primary voltage and current ratings against site specifications before ordering to avoid ratio mismatches.
- Confirm protection relay settings align with the selected accuracy class and transient performance of the transformer.
- Plan enclosure spacing and access paths to facilitate safe installation and future maintenance.
- Use adapt solutions in phased upgrade projects to minimize downtime and control capital expenditure.
- Document insulation tests and commissioning results to track long-term performance trends.
FAQ
Reader questions
What primary voltage ranges are supported by Emek HV current transformers?
They cover 72.5 kV to 252 kV as standard, with options to configure up to 800 kV for extra high voltage applications.
How does the accuracy class affect protection and metering in this product line?
Classes such as 0.1S ensure reliable energy metering, while 5P and 10P designations provide predictable behavior for protection relays during fault conditions.
Can Emek HV adapt solutions be used in existing switchgear cabinets?
Yes, the adapt units are designed to integrate with legacy panels through standardized mounting and terminal layouts, reducing retrofit complexity.
What environmental conditions should be considered when installing these current transformers?
They are rated for harsh conditions including high humidity, contamination, and wide temperature ranges, but site-specific installation practices should follow local guidelines and standards.