CPC 100Substation multifunctional one-time testing systemIntroduction:
CPC 100 Multi functional One time Testing System for Substation Debugging and Maintenance
Tests on power transformers, current transformers, voltage transformers, rotating motors, grounding systems, lines and cables, and circuit breakers can all be performed through CPC 100.
The CPC100 one-time injection testing system can completely replace single function testing equipment. This will greatly reduce training and transportation costs, while shortening testing time. Therefore, CPC 100 is an ideal tester for debugging and maintaining substation equipment.
CPC 100 is the foundation for using numerous attachments. These attachments can assist in more applications, such as power/dielectric loss factor measurement and line and ground impedance measurement.

CPC 100 Substation Multi functional One time Testing SystemFunction:
It can output a current of 800 A or a voltage of 2000 V, with a high output power of 5 kVA. The frequency adjustment range of the AC signal is 15-400 Hz, or it can output a current of 400 A DC
Excellent anti-interference ability, capable of measuring very small signals
Convenient transportation (only 29 kg) - very suitable for on-site testing
• There are test templates that automatically generate test programs and test reports
By using a current or voltage booster, it is possible to output a current of up to 2000 A or a voltage of 12 kV

CPC 100 application:
Current Transformer (CT)
• Transformer turns ratio
• Winding DC resistance
Dynamic Resistance (DRM)
• Excitation current
• Short circuit impedance/leakage impedance
• Demagnetization

Voltage Transformer (VT)
• Ratio, load, and polarity
• Phase and amplitude errors
• Magnetization curve
• Winding resistance
• Secondary load
• Dielectric withstand voltage (2 kV AC)
• VT circuit integrity

transformer
• Variable ratio
• Winding resistance
• Tap test
• Magnetizing current
• Short circuit impedance
Transformer demagnetization

Lines and cables
Impedance (k-factor)
• Mutual inductance

grounding system
• Grounding impedance
Step voltage and contact voltage

circuit breaker
• Contact resistance

CPC 100 Solution:
• Power transformer testing
Power transformers are the core nodes in the field of transmission and distribution. Therefore, its status is crucial for the reliable and fault free operation of the power system. Any form of malfunction can have serious consequences. The resulting local overload of the power grid may also cause significant power supply and generation issues. Complete insulation failure may also cause personal injury and significant damage to property.
Preventive replacement after a certain period of operation is usually not an economically feasible solution, as the corresponding cost of replacing such equipment is very high, and the aging status of the equipment is also related to the operating conditions of the transformer. So, state based or timed device testing and diagnosis have developed into better methods.
Therefore, for the testing and online monitoring of power transformers, we have developed various solutions that comply with relevant international standards, such as IEC 60270、IEC 60076-1、IEC 60076-3、IEC 60076-11、IEEE Std C57.12.00、IEEE Std C57.12.90、IEEE Std C57.113、IEEE Std C57.124 And IEEE C57.127.

• Instrument transformer testing
The instrument transformers used for measurement purposes must have high accuracy, up to 0.1 level, to ensure accurate billing. Therefore, it is necessary to regularly inspect and calibrate these instrument transformers.
The protective transformer provides signals for the protective relay and must also operate accurately at a current state that is a certain multiple of the rated current. Regular inspections can ensure that instrument transformers and their connected relays can respond quickly and correctly in the event of a system failure, greatly ensuring power supply safety.
The importance of transformer testing is often underestimated. Testing before the first use of transformers can greatly reduce the risk of confusion between measuring transformers and protective transformers, or wiring confusion. At the same time, it is also convenient to detect internal damage to the transformer (such as damage caused during transportation). Early detection of internal changes in transformers, such as those caused by insulation aging.
Our testing system can complete high-precision automatic testing and evaluation of transformers. For current transformers, the testing is based on IEC 60044-1, IEC 60044-6, IEC 61869-2, IEEE C57.13, and IEEE C57.13.6 standards; For voltage transformers, the testing is based on the IEC 60044-2, IEC 60044-5, IEC 61869-3, IEC 61869-5, IEEE C57.13, and IEEE C57.13.6 standards; For combination transformers, the testing is based on IEC 60044-3 and IEC 61850 standards.

• Switchgear/Circuit Breaker Testing
The switchgear with core components such as busbars, isolating switches, and circuit breakers is the distribution node of the electrical energy network. Compared to conventional outdoor switchgear, gas insulated switchgear (GIS) is an alternative option that can save space. Compared with air, compressed gas (usually SF6) significantly improves insulation strength, and therefore the insulation distance to ground can be greatly reduced.
Circuit breakers are particularly important components that require good maintenance measures as they contain multiple movable parts. In most cases, they remain stationary for many years, and in the event of a malfunction, they need to reliably disconnect thousands of amperes of current within a few milliseconds. The connection and transmission nodes of the busbar and isolation switch are prone to problems and require regular testing.
High voltage brings electrical pressure to the materials used in the equipment. Therefore, it is recommended to conduct insulation testing. In theory, GIS system testing only needs to be the same as other systems. However, as contact is usually very difficult, special measures need to be taken.

• Cable testing and monitoring
High voltage cables are used to supply power to densely populated areas or offshore facilities. To ensure power supply safety, power cables must operate without faults for decades and require minimal or no maintenance work.
There are not many diagnostic measures to evaluate the status of cables and their accessories. In addition to high-voltage partial discharge testing, dielectric measurement methods can also be used to check the insulation status of cables, such as measuring power factor/dielectric loss factor, capacitance, and dielectric response. Measuring temperature and oil pressure at different locations can also reflect the current cable load status.
Online monitoring of these parameters of the cable is an effective method for continuous evaluation of insulation status, especially when there is suspicion of cable problems or during the entire operation period to check the insulation status.
We provide users with various online and offline testing and monitoring solutions in accordance with relevant international standards, ensuring the reliable operation of cables and cable accessories and extending their service life.

• Rotating motor testing and monitoring
Rotating electrical machines (such as generators and electric motors) are very important equipment in power generation and industrial applications. The reliability and availability of the motor are crucial for ensuring the reliability and stability of the power supply. Premature failure caused by unexpected power outages and potential damage to the equipment itself may result in serious economic losses. In order to effectively carry out planned maintenance, it is necessary to understand accurate status information about when components need to be repaired or replaced.
Like other high-voltage equipment, the insulation system in generators and motors is subject to aging processes. Excessive aging can lead to equipment failure, so it is important to understand the insulation status of the motor throughout its entire service life.
During debugging and acceptance testing, as well as the operation and maintenance of rotating motors, various offline and online diagnostic methods are used to support reliable insulation state assessment. These diagnostic methods include dielectric loss/power factor measurement, partial discharge, withstand voltage testing, and insulation resistance/polarization index. In addition, there are other routine electrical tests that can be performed on the stator, stator core, and rotor to provide you with a complete motor condition assessment.
For all these diagnostic methods, we provide you with matching testing and monitoring solutions. Through this, you can perform fast and accurate status assessments on various motors to quickly identify potential issues and risks.

• Transmission line testing
Correct line parameters are crucial for the reliability and selectivity of distance protection actions. With the correct line parameters, the accurate fault location can also be determined through fault waveform analysis after an event occurs on the line. The line parameters include positive sequence impedance, zero sequence impedance, and k-factor. For double or multiple circuit lines, mutual inductance impedance is also required.
These parameters are usually calculated through the system, and these calculated parameters do not represent the actual values of the line parameters, as the characteristics of the soil are unknown, such as soil resistivity, water pipes, or other types of buried conductors, which can vary in different situations. The difference between the calculated data and the actual line parameters may lead to misoperation of distance protection due to under crossing and over crossing. Even leading to power outages and grid instability.
The solution we provide can quickly and safely determine the required line frequency parameters.

Grounding system testing
The grounding system can properly connect the neutral point of the electrical system to the ground potential. When a single phase to ground fault occurs, the current flows back to the neutral point through the grounding system, and the lower the resistance value of this grounding system, the better. This current will cause an increase in the potential of the entire grounding system to the ground potential.
The relevant standards (such as IN VDE 0101, CENELEC HD637S1, IEEE Std 80-2000, and IEEE Std 81-1983) define the maximum value of potential rise, which is related to the duration of single-phase faults in the system. These standards also mention the maximum allowable step voltage and contact voltage limits within and around substations. If the step voltage and contact voltage exceed the maximum allowable value, single-phase faults may cause harm to people and animals, and even fatal injuries.
The testing solution we provide can safely, quickly, and reliably measure the impedance of the grounding system, as well as the step voltage and contact voltage inside and around the substation.