Crest Test Systems Pvt. Ltd.

Nanded City, Pune, Maharashtra

Endurance testing is a crucial process for circuit breakers, as it helps ensure their stability and uncovers any potential early failures in the switchgear assembly. The Circuit Breaker Endurance Test System conducts comprehensive mechanical endurance tests on various types of switchgear by executing multiple cycles of opening and closing. This system comprises an Endurance Controller, which programs the test cycles, as well as built-in AC and DC power supplies that energise the circuit breaker coils and operate the spring charging motor. The testing process evaluates circuit breakers at rated, minimum, and maximum voltage levels, with the option to test multiple breakers or drives simultaneously. We are excited to present our most recent line of PLC-based intelligent endurance controllers, equipped with an intuitive touchscreen HMI for smooth navigation and operation of the test control software.

AutoScan Circuit Breaker Test System performs routine tests on circuit breakers and various other types of switchgear. The test system tests vacuum circuit breakers, high-voltage circuit breakers, and extra high-voltage circuit breakers per suitable standards. AutoScan Circuit Breaker Test System performs standard tests like coil and motor current measurements, contact timing measurements, and travel and speed measurements. By adding the MVT and DMVT accessories it can also perform static and dynamic contact resistance measurements without any changes in the measurement set-up. The system is fully modular and expandable with the facility for adding additional tests to meet specific customer needs and industry requirements. AutoScan Circuit Breaker Test System comes with built-in power supplies with precision regulated outputs for coils and motors. These ensure stable and reproducible testing conditions and reduce the risk of wiring to live AC/DC sources.

Measuring static contact resistance is crucial for assessing the health and functionality of a circuit breakers main contacts. Poor contact conditions can lead to arcing and single phasing, often resulting from oxide deposits and moisture absorption, which increase contact resistance. This, in turn, causes I2R losses due to hot-spotting when the circuit breaker closes.The MVT Contact Resistance Meter employs Kelvins 4-wire method to measure the static resistance of circuit breaker main contacts precisely. It features a built-in continuous DC source of up to 200A and conducts resistance measurements in the micro-ohm range by assessing the millivolt drop across the contacts.Mounted on a trolley for easy mobility on the shop floor, the MVT is suitable for evaluating contact resistances of vacuum circuit breakers, high-voltage circuit breakers, extra high-voltage circuit breakers, isolators/disconnectors, bus bars, and numerous other components utilised in power transmission and distribution.

The CT-HVT Series encompasses a selection of automated high-voltage AC testing equipment designed for evaluating various test objects with voltage capacities up to 100 kV RMS at a line frequency of 50 Hz. These systems provide substantial output current at elevated voltages, making them appropriate for conducting assessments in environments with high capacitance loads. In addition, a user-friendly touchscreen interface and digital controls enable fully automated test cycles and storage of results within the equipments internal memory. Additionally, the CT-HVT Series offers comprehensive safety features, including overcurrent, short circuit, overvoltage, input power safety, and operator safety protection

The Panel Test System offers an all-inclusive solution for assessing circuit breaker panels, featuring Windows-based testing software. In addition, this system includes primary and secondary current injection kits and multiple power supplies designed to activate trip and close coils and power the spring charging motor. Equipped with AC and DC voltmeters, a galvanometer, and a continuity tester, the Panel Test System provides comprehensive testing capabilities. Moreover, the built-in contact resistance meter allows for precise measurement of contact resistance in a variety of components, such as contacts, bus bars, and joints, ensuring accurate evaluation and performance monitoring.

The Portable Point on Wave Synchronous Test Sequencer stands as Indias exclusive system for synchronising control signal timings during short circuit tests on medium and high voltage switchgear and control gear. In addition, it can perform programmed test sequences repeatedly to assess the electrical and mechanical endurance of devices. The system comprises a command sequencer module, synchronising module, and output modules, creating a comprehensive sequencing test system together. The synchronising module obtains timing and sync pulses from the test generator, which offers a precise point-on-wave timing reference for coordinating the transient recorder, master circuit breaker, and make switch. Users can fully customize the test coordination using the Test Sequencer by adjusting various make switch and master circuit breaker operator variables. As a result, users can design test strategies that meet acceptance test specifications for short circuit tests.

Our AC and DC power supplies deliver the necessary power to energise the breakers trip and close coils, and drive the spring charging motor. Depending on your specific requirements, we offer a range of power supply options, including one-phase or three-phase AC, DC, or AC/DC dual-mode configurations. For assistance selecting the most suitable power supply, please consult our product expert based on your breaker specifications. Our DC power supplies utilise IGBT-based SMPS technology, while the AC power supplies employ motorised dimmerstats. Our power supplies are designed to meet various needs with voltage ratings ranging from 10 to 300 V AC or DC and power ratings up to 6 kW. All power supplies have short circuit and overcurrent protection, featuring automatic recovery after fault clearance. Additionally, the isolation between the output and control voltage of the power supply exceeds 1 kV.

We offer custom-designed fixtures compatible with circuit breakers manufactured by ABB, CG, L&T, Schneider, Siemens, Toshiba, and other brands. Furthermore, we tailor these test fixtures to ensure they are suitable for mounting on circuit breakers of any design. The transducer is responsible for measuring contact travel and related parameters, including contact speed or velocity, contact gap, snatch gap, wipe gap, bounces, bounce duration, rebound, rebound duration, over travel, and over travel duration. Linear travel measurements are expressed in millimetres, while rotary or angular travel measurements are represented in degrees. We utilise either a resistive transducer or a more precise laser transducer for linear travel measurements. On the other hand, rotary travel measurements employ either a resistive transducer or an encoder for enhanced accuracy.

CBScan PA0304 is a NextGen operation analyzer for testing Circuit Breakers up to 245 kV. It uses wear-resistant test lead sets to connect to the device under test (DUT) and measures the contact timings and travel of the three main contacts. The analyzer has a touchscreen interface with a built-in operating system that allows standalone operation without requiring a PC interface. The instrument also has an Ethernet port for users who prefer to operate it via a PC using the ProaCTS CBScan software. The test system can perform Close, Open, CO, OC, OCO, and O-0.3sec-CO-3Min-CO operations on the DUT. These tests provide valuable information for evaluating and rectifying settings for contact timings, contact travel, operating speed, over-travel, bounce, and several other parameters.

CBScan PA0905 is a NextGen operation analyzer for testing Circuit Breakers up to 245 kV per IEC standards for routine tests and final acceptance. The ProaCTS CBScan PC software supplied with the analyzer allows users to pre-configure test parameters and sequences, saving valuable time in the switchyard and minimizing downtime. In addition, the software displays results with graphs and generates test reports. CBScan connects with the device under test (DUT) using wear-resistant test leads set and measures the Main, PIR, and Auxiliary Contact timings. It also measures the travel of the three circuit breaker mechanisms. Additionally, the system performs various functional tests on the DUT. Test results analysis provides valuable information for evaluating and rectifying settings for contact timings, contact travel, operating speed, over-travel, bounce, and other parameters. The test system performs Close, Open, CO, OC, and OCO operations. Further, it also performs the O-0.3sec-CO-3Min-CO operation.

CBScan PA1505 is a NextGen operation analyzer for testing Circuit Breakers up to 400 kV per IEC standards for routine tests and final acceptance. The ProaCTS CBScan PC software supplied with the analyzer allows users to pre-configure test parameters and sequences, saving valuable time in the switchyard and minimizing downtime. In addition, the software displays results with graphs and generates test reports. CBScan connects with the device under test (DUT) using wear-resistant test leads set and measures the Main, PIR, and Auxiliary Contact timings. It also measures the travel of the three circuit breaker mechanisms. Additionally, the system performs various functional tests on the DUT. Test results analysis provides valuable information for evaluating and rectifying settings for contact timings, contact travel, operating speed, over-travel, bounce, and other parameters. The test system performs Close, Open, CO, OC, and OCO operations. Further, it also performs the O-0.3sec-CO-3Min-CO operation.

The AutoScan PA9600 is an advanced operational analyzer designed to test a wide range of circuit breakers, from low voltage (LV) to ultra-high voltage (UHV) up to 1200 kV, under live switchyard conditions. This versatile analyzer conducts contact travel, contact timing, coil and motor current, and both static and dynamic contact resistance measurements. Featuring a specially designed trolley, the AutoScan PA9600 can be easily manoeuvred across uneven switchyard terrain. The analyzer comes with the ProaCTS AutoScan PC software, enabling users to pre-configure test parameters and sequences, saving valuable time in the switchyard and reducing downtime. In addition, the software presents test results, including graphical representations, and generates detailed test reports. Overall, the AutoScan PA9600 offers a comprehensive solution for efficiently and accurately testing circuit breakers in various challenging conditions.

CBScan LOCO is an innovative, lightweight, portable Vacuum Circuit Breaker (VCB) Analyzer designed specifically for railway loco sheds. It serves to test Loco-VCBs manufactured by Autometer Alliance (AAL), Bombardier Transportation, Schneider, Alstom, and BHEL. The analyzer is based on Crests proprietary embedded-based data acquisition platform, which leverages the computing power of a PC. The ProaCTS Loco PC software, supplied with the analyzer, allows users to pre-configure test parameters and sequences, thus saving valuable time in the switchyard and minimising downtime. The software also displays results with graphs and generates test reports, offering a comprehensive solution for professionals in the industry. The CBScan LOCO represents a significant advancement in portable VCB analyzers, offering a lightweight and efficient solution for testing Loco-VCBs in railway loco sheds.

The Type Test System is designed to conduct comprehensive full-load assessments on 3-phase AC traction and induction motors within the manufacturing facility to evaluate their performance. The setup includes appropriate power sources to drive the motor and sensors to measure the motor parameters. Additionally, the system features suitable loads (either conventional or regenerative) for applying load to the motor during testing. Our proprietary ProaCTS MoTest software aids in setting up test sequences, configuring pass-fail thresholds, and generating tamper-proof test reports.

The Routine Test System conducts no-load (routine) tests on AC or DC motors. This setup features appropriate power sources for driving the motor and sensors for measuring motor parameters. Our proprietary ProaCTS MoTest software simplifies test sequence creation, pass-fail benchmarking, and report generation for reliable and accurate results.

The Light Load Test System is designed to conduct light load tests on AC and DC motors during regular maintenance and overhauls at locomotive sheds or maintenance depots. The system includes either a Variable Voltage Frequency Drive (VVFD) for AC motors or a DC drive for DC motors. This setup allows for measuring several vital parameters, such as applied voltage, current draw, power consumption, power factor, applied frequency (for AC motors), motor RPM, and temperature. This ensures comprehensive and efficient motor assessment during maintenance procedure

CBScan is an easy-to-carry test instrument which has basic functionality and features required for

testing all types of Switchgear present in GIS chambers like, Circuit Breakers, Drives, Earth Switches,

etc. CBScan is a software-based economical instrument which is useful for shop floor testing and

onsite commissioning.

Analysis of test results provides information which is useful for evaluating and rectifying settings for

motor currents, contact timings, closing and opening speeds, over-travel, rebound, and contact wipe,

etc. The operations that can be performed by this system are Close, Open (for switch, drive & circuit

breaker) CO, OC, OCO, and other complex recloser sequences (for circuit breakers only).