Measurement

Power System Automation

Power system and substation automation systems, as well as data acquisition systems, are based on distributed field-level devices responsible for measuring power system parameters, processing discrete signals, executing control commands, and monitoring non-electrical quantities.

Multifunctional measuring transducers ENIP-2 provide a full range of telemetry measurements, as well as remote control, status indication (binary indications), and technical energy metering, with data exchange via digital interfaces RS-485 and Ethernet, either directly with the dispatch control center or via a data acquisition unit.

Depending on the application, ENIP-2 transducers are available in the following versions:

Standard – plastic enclosure (75 × 100 × 110 mm) for DIN-rail mounting
Panel – panel-mounted unit with integrated display for installation on switchgear panels
Compact – compact metal enclosure designed for installation in AIS switchgear cells

Commercial Metering

The automated information and measurement system for commercial energy metering uses ESM measuring devices, which can be used as:

– Electricity meters for commercial electricity metering (IEC 62053-22:2003);
– Electricity quality indicator (PQI) meters (IEC 61000-4-30:2008, IEC 61000-4-7:2009);
– Panel meters complete with an ENMI display module;
– Digital measuring transducers.

Synchronized Phasor Measurements

Synchronized phasor measurements - high-precision measurements at various points in the power system, synchronized with global navigation satellite systems - are used to monitor the dynamic properties of the power system, predict emergency events, and implement relay protection. 

ENIP-2 synchronized phasor measurement units (PMU) perform measurements with standardized accuracy at clearly defined points in time. Synchronization of the internal clock with a standard time source is achieved via GLONASS/GPS signals or via the facility's local network using the IEEE 1588v2 PTP protocol. 

Incorrect operation of the generator excitation system can lead to voltage instability, overloads, and other problems that can cause damage to the network. 

The ENMV-3 module monitors the DC current and voltage signals of the generator excitation system and transmits measurement results via the IEEE C37.118.2 protocol to synchronized phasor data concentrators (SPCs).

Digital Substation

Digitalization of electrical networks improves the visibility of facilities by increasing the volume of data received, as well as improving the accuracy of network parameter measurements and energy metering through the use of digital instrument transformers. 

ENIP-2 and ESM measuring devices support IEC 61850 digital substation protocols (SV, GOOSE, MMS) and are used in highly automated substations as controllers for measuring network parameters at the feeder, monitoring the status of switching devices and protections, and issuing control commands. 

Digital measurement, protection, and control devices receive data from two primary sources:

- Merging Units (ENMU);
- Combined instrument transformers (ECIT), designed for 6-20 kV switchgear.

ECIT lacks a steel core, and the transformer is not susceptible to phenomena such as ferroresonance, residual magnetization, and saturation. ECIT not only performs measurements and technical metering, but also supports emergency event recording and provides relay protection for the feeder.

ENIP-2, ESM, ENMV, and ENMU series devices come with a 60-month warranty, while the ECIT series comes with a 36-month warranty.