Overview
Elseta’s innovative range of adapters is expertly designed to complement our advanced Fault Passage Indicators (FPI) and measurement and protection devices. In alignment with the rigorous standards set by IEC 61869-11 and IEC 61869-10, our devices are configured to work seamlessly with sensor-type inputs, specifically accommodating voltage sensors with AC 3.25 V/√3 and AC 225 mV inputs.
To ensure versatility and broad compatibility, we have developed a variety of adapters. These adapters are crucial for enabling our FPI devices to interface with a range of current transformers (CTs) and voltage transformers (VTs). They are specifically engineered to handle CT outputs of 5A/1A and VT outputs of 100V/400V. This adaptability makes our devices suitable for a wide array of applications in medium-voltage transformer stations, ensuring accurate measurements and reliable protection in diverse electrical environments.
Our commitment to quality and compliance with international standards underscores our dedication to providing solutions that not only meet but exceed customer expectations in terms of performance, reliability, and safety.
Features
Simplified Wiring and Installation: The ability to connect via wire to the low-voltage secondary circuit simplifies the wiring process, making installation quicker and more cost-effective. This is particularly beneficial in complex or space-constrained environments.
Isolation and Safety: Adapters can provide additional electrical isolation between the high-power circuits and the sensitive electronic measurement and protection circuits. This enhances safety and reduces the risk of damage to the electronic components.
Standardisation and Interoperability: By conforming to widely accepted standards, adapters ensure interoperability between different types of equipment and sensors, simplifying integration in diverse electrical systems.
Modularity: The modular nature of using adapters allows for more flexible system design and easier troubleshooting and maintenance. Components can be added, removed, or replaced without affecting the rest of the system.
Ease of Upgrade and Replacement: If sensor technology evolves or if there’s a need to replace a sensor, using adapters makes it easier to upgrade without modifying the entire system. This is more cost-effective and less time-consuming.
Versatility and Compatibility: Adapters allow for the use of a wide range of current and voltage sensors, catering to different standards and specifications. This enables the devices to be used in various electrical environments without the need for custom-built hardware.
Cost-Effectiveness: Adapters can be a more cost-effective solution compared to designing and manufacturing specialised integrated circuits for each application, especially for low to medium volume applications.
Compatibility with Standards: An additional significant benefit of our adapters is their compatibility with a range of international and industry standards. This compliance ensures that our products meet the highest levels of quality, safety, and performance, aligning with global best practices. The relevant standards include:
- IEC 60044-7: About electronic voltage transformers, this standard covers the requirements for voltage sensor inputs, ensuring accuracy and reliability in voltage measurement.
- IEC 60044-8: This standard applies to electronic current transformers, guiding the requirements for current sensor inputs, crucial for precise current measurement.
- IEC 61869-10: Focusing on additional requirements for electronic current transformers, it extends the scope of IEC 60044-8, providing a more comprehensive framework for current measurement accuracy.
- IEC 61869-11: Similar to IEC 61869-10, this standard is specific to electronic voltage transformers, supplementing the guidelines of IEC 60044-7 for enhanced voltage measurement precision.
By ensuring compatibility with these standards, our adapters not only guarantee the technical excellence of our products but also facilitate their integration into various electrical systems worldwide. This compliance serves as a testament to our commitment to delivering state-of-the-art solutions in the field of electrical measurement and protection.
Specifications
| Device data | Current transformer adapters | |
| Article number | CT-1A | CT-5A |
| Product Description | 3-phase current transformer to current sensor output adapter for CT with secondary circuit of 1A nominal | 3-phase current transformer to current sensor output adapter for CT with secondary circuit of 5A nominal |
| Input | AC 3x1A | AC 3x5A |
| Input rated current In | 1A (fixed) | 5A (fixed) |
| Max. measuring current | 200 % In | 200 % In |
| Rated frequency | 50 Hz, 60 Hz (Range between 45 Hz and 65 Hz) | 50 Hz, 60 Hz (Range between 45 Hz and 65 Hz) |
| Output | 3x225mV (4wire) | 3x225mV (4wire) |
| Rated voltage | 225 mV at In = 1 A based on IEC 61869-10 | 225 mV at In = 5 A based on IEC 61869-10 |
| 2.25 V at In = 10 A | 2.25 V at In = 50 A | |
| Operating conditions | ||
| Operating temperature | -40°C … 55°C | -40°C … 55°C |
| Storage temperature | -40°C … 85°C | -40°C … 85°C |
| Relative humidity | max. 95 % (non condensing) | max. 95 % (non condensing) |
| Protection class | IP20 | IP20 |
| Dimensions and installation instructions | ||
| Case height x width x depth | 90 x 57.3 x 55 mm | 90 x 57.3 x 55 mm |
| Installation type | DIN Rail mounting | DIN Rail mounting |
| Warranty | 2 years | 2 years |
| Device data | Voltage transformer adapters | |
| Article number | VT-100 | VT-400 |
| Product Description | 3-phase voltage transformer to voltage sensor output adapter for VT with secondary circuit of 100V nominal | 3 phase voltage transformer to voltage sensor output adapter for VT with secondary circuit of 400V nominal |
| Configuration software | Not required | Not required |
| Warranty | 2 years | 2 years |
| Input | AC 3x100V, Nominal | AC 3x400V, Nominal |
| Input voltage Un | AC 100 V/√3 (fixed) under IEC 61869-11 | AC 415 V/√3 (fixed) under IEC 61869-11 |
| Input rated frequency | 50 Hz, 60 Hz (Range between 45 Hz and 65 Hz) | 50 Hz, 60 Hz (Range between 45 Hz and 65 Hz) |
| Input max measuring voltage | 150 % Un (error condition) | 150 % Un (error condition) |
| Output | AC 3x 3.25 V/√3 under IEC 61869-11 | AC 3x 3.25 V/√3 under IEC 61869-11 |
| Rated frequency | 50 Hz, 60 Hz (Range between 45 Hz and 65 Hz) | 50 Hz, 60 Hz (Range between 45 Hz and 65 Hz) |
| Operating conditions | ||
| Operating temperature | -40°C … 55°C | -40°C … 55°C |
| Storage temperature | -40°C … 85°C | -40°C … 85°C |
| Relative humidity | max. 95 % (non condensing) | max. 95 % (non condensing) |
| Protection class | IP20 | IP20 |
| Dimensions and installation instructions | ||
| Case height x width x depth | 90 x 57.3 x 46 mm | 90 x 57.3 x 46 mm |
| Installation type | DIN Rail mounting | DIN Rail mounting |
| Warranty | 2 years | 2 years |
Documentation
Order
CT-1A – 3-phase current transformer to current sensor output adapter for CT with secondary circuit of 1A nominal
CT-5A – 3-phase current transformer to current sensor output adapter for CT with secondary circuit of 5A nominal
VT-100V – 3-phase voltage transformer to voltage sensor output adapter for VT with secondary circuit of 100V nominal
VT-400V – 3-phase voltage transformer to voltage sensor output adapter for VT with secondary circuit of 400V nominal