Products by Application

Protection relays are essential devices for maintaining the operational safety of the electrical power system. Thus, it is essential to carry out periodic tests on this equipment, in order to prove its correct operation and reliability. With that in mind, Conprove developed its line of universal testers, ideal for conducting commissioning, maintenance and acceptance tests (TAF / TAC) of these devices, in addition to providing an innovative closed loop iterative testing methodology for the evaluation of protection devices .

With the advent of Smart Grids, the operational complexity of recloser control has increased significantly over time, due to the high sophistication and new technologies used in modern digital controllers. This reflects the need for increasingly robust, accurate, reliable and easy-to-use test equipment.

With that in mind, Conprove makes available to its customers equipment capable of carrying out tests on reclose controls with high precision, through an intuitive software interface that facilitates the execution of these tests.

Performing measurements of the power system quantities using equipment such as power quality analyzer, transducers or meters, is essential in several segments of the electrical sector, for: decision making by the operation / maintenance sectors, diagnoses of power quality problems, concessionaire billing, operation of control / automation systems, among other actions.

In order to achieve excellence in the execution of the various actions mentioned, it is essential that the measurement equipment used is tested / calibrated periodically, in order to ascertain its correct operation.

In this context, Conprove makes available its complete line of universal testers that make it possible to carry out tests / calibrations on power quality analyzer, transducers and meters with the high precision required and with intuitive software dedicated to carrying out these tests with
speed and efficiency.

Power transformers are equipment intended for the transmission of power between the various systems that make up the electrical network, adjusting the voltage and current levels of these systems. As they play a very important role in the electrical network, it is essential to periodically carry out tests on this equipment, in order to diagnose possible occurrences of malfunction and maintenance needs.

In this context, Conprove has developed a line of universal testers that, in addition to carrying out tests at the secondary level (relays, meters, power quality analyzer, etc.) also carries out tests at the primary level, which involves the possibility of testing the power transformers. Among the tests made possible, we can highlight:

• Single-phase transformation ratio test, checking the angular lag between high and low;
• Three-phase transformation ratio test, checking the angular lag between high and low with the possibility of automatic tap switching;
• Measurement of winding ohmic resistance;
• Verification of dielectric supportability by voltage (2 kVac).

Instrument transformers are equipment responsible for conditioning current and voltage signals that flow in the primary of the electrical system, to secondary values ​​delivered to protection relays, meters, among other equipment. Thus, it is essential that these equipments are tested periodically, since their malfunction can affect the performance of the protection and measurement systems.

In this context, Conprove has developed a line of universal testers that, in addition to carrying out tests at the secondary level (relays, meters, power quality analyzer, etc.) also carries out tests at the primary level, which involves the possibility of testing instrument transformers. Among the tests made possible, we can highlight:

• Transformation ratio, polarity and burden test;
• Magnetization Curve Test;
• Measurement of winding resistance;
• Verification of voltage dielectric support (2 kVac);

TESTING OF CIRCUIT BREAKERS AND DISCONNECT SWITCHES

Circuit breakers are devices that operate as automatic switches, ensuring that the opening or reclosing commands received from the protection system are executed satisfactorily. The disconnect switches are used as safety devices in the de-energizing of circuits, which makes human work safe.

Due to the importance of these elements, periodic tests are essential in order to diagnose possible operational failures, whether related to the opening / closing times or the resistance they offer to the system when they are closed.

In this context, Conprove has developed a line of universal testers that, in addition to carrying out tests at the secondary level (relays, meters, power quality analyzer, etc.) also carries out tests at the primary level, which involves the possibility of testing circuit breakers and disconnect switches. Among the tests made possible, we can highlight the opening / closing tests of poles and auxiliary contacts and contact resistance tests.

The IEC 61850 standard has revolutionized the communication segment between electrical power system equipment, with the structuring and standardization of Client-Server, GOOSE and Sampled Values messages. Such messages were designed to replace conventional analog and digital signals, traveling through network structures and no longer through hard cabling.

In this context, the protection and measurement devices have also been adapted to the environment of this standard, aiming to enable the sending and receiving of GOOSE and Sampled Values messages. This fact brought to light the need for new methodologies for testing and commissioning these devices.

As a company that is committed to keeping up with new trends by offering innovative solutions to its customers, Conprove has developed a line of universal testers controlled by intuitive software, capable of generating and also receiving GOOSE, Sampled Value and Client-Server messages.

An electrical transient occurs when there is a sudden variation in the steady state conditions of an electrical system, such as the opening or closing of a switch, or the occurrence of a fault at any point in that system.  The transitional periods are very small and, in most cases, insignificant when compared to the period of permanent regime.

Despite this, these transient periods are extremely important, as it is during the occurrence of these that the equipment in the system is subjected to the greatest electrical stresses due to voltages or excessive currents. In extreme cases, an electrical transient can promote harmful results such as making equipment unusable, bringing down a factory’s electrical system or even causing a “black-out” in a city or region. For this reason, a clear analysis of the event is essential for understanding the behavior of the electrical system during the transitional period and such analyzes are performed with EMTP (Electromagnetic Transients Program) software.

In order to meet the demands of analysis of electromagnetic and electromechanical transients, Conprove developed the PS Simul software that will allow the user to model and simulate complex power and control systems, in order to reproduce various phenomena of the electrical system with high fidelity. The software makes available to the user a vast library with more than 400 elements, allowing simulations of: lightning strikes, energizing lines and transformers, transient switching / faults, motor starting, saturation of TC’s, restoring voltages, among several other applications.