Kingrun Tester Lily Zhang’s Post

Routine Test of Capacitor Bank according to IEC 60871-1: -Capacitance measurement -voltage test between terminals -Ac voltage test between terminals and container -measurement of tangent of the loss angel -test of internal discharge device -sealing test( leakage test) -discharge test on internal fuse #capacitor #Mv_capacitor #routin_test #electrical_test #power

Cable Size based on the breaker rating, ensuring compliance with the IEC standard. Schneider Electric Cable selection chart for Circuit breakers Rating #cablesizing #circuit_breaker #switchgear #IEC_standard

Three-phase fully automatic AC voltage stabilizer

Normally when a surge enters a structure, it's remarkably close to a combination Ring Wave surge (1.2/50µs or 8/20µs). This phenomenon also occurs when a surge goes through the filter which causes the coils to ‘ring’ at the circuit’s resonant frequency or caused by switching of electrical networks, reactive loads, power-circuit failures, insulation breakdown or lightning in low-voltage cables. IEC 61000-4-12 defines the test setup, test levels and procedure to perform the ring wave surge test. Ring wave surge generator at INTL Inc. can perform testing as per IEC 61000-4-12 up to the test level of 6kV. Explore: https://lnkd.in/diRUTYKX #Ringwavesurge #RingWave #RingWaveSurgeinCanada #IEC61000 #power #testing #Inspection #certification #Electrical #INTL #Intertestlab

The1.75MVA 3 phase 33kv/433v ——————————————— Transformer being ————————————— tested for Partial Discharge. —————————————— This is a oil impregnated transformer with cable box in/out transformer. There is an off load tap changer on the HV side. Notice the 100kv coupling capacitors and the special testing bushings ( these bushings meet the requirements of IEC 60502.4 and GB/T12706.4 standards),connected to the C type cable bushings. The coupling capacitors allow measurement of the partial discharge via a detector circuit and also serve as a voltage devider to measure the voltage to earth.

"You Ask, We Answer" is an online panel session where industry experts discuss and answer the questions you ask which helps you work better. Use this opportunity to share your questions related to protection, relay, busbar testing, sampled value, and digital substation that revolve around below-mentioned points when you register : ·        Fault Locator ·        Auto reclosure ·        Sampled value ·        Line differential ·        Low impedance REF ·        Generator protection ·        Transformer differential ·        Power swing block (PSB) ·        Line / Distance protection ·        Self-powered relay testing ·        Wrong phase coupling (WPC) ·        Time synch for IEC61850-9-2LE ·        SOTF in the transformer differential ·        ROCOF protection-IEC60255-181:2019 ·        High burden electromechanical relay testing ·        Comtrade playback/disturbance recorder files playback ·        Local Breaker Backup (LBB) Vs Breaker Failure Protection (BFP) Register Now - https://lnkd.in/d6tTHytG #paneldiscussion #youaskweanswer #onlinediscussion #Power #Protection #powerprotection #PSB #megger #meggerindia

You can test with three test bushings and three coupling capacitors and the voltage to ground nominally is 33kv/1.732 OR You can earth B phase and then have only two test bushings and two coupling capacitors and have 33kv nominally to earth . (Remember the output winding is delta connected and the nominal phase to phase voltage is 33kv.) SO WHY do this ? The the air clearance A phase to C phase is much larger under these test conditions. Remember the centre phase(B phase) is earthed and that means you then have a larger clearance phase to phase. BUT, the voltage to earth is much higher for A phase and C phase . But this is no problem with the special test bushings. They are rated to in excess of 41 kv to earth.

Short circuit tolerance of the main transformer of the power plant As you know, the GCB of the power plant must have the ability to cut off the short circuit in critical conditions of Out of Phase Synchronizing and control the return over voltages (TRV) caused by it. But why does the IEC 60076-5 standard consider the ability of the power plant's main transformer to pass this current to be important? As we know, the size of Out of phase current is not greater than Three-phase short circuit current, so why does the standard insist on this issue?

In a plasma exhaust gas processor, the role of the pressure transmitter is to monitor and control the pressure within the system to ensure the safety and efficiency of the treatment process. Its application principles mainly include: 1. Pressure monitoring: The pressure transmitter measures the gas pressure inside the system in real time and converts this data into electrical signals. 2. Data transmission: The pressure data is transmitted to the control system for monitoring and adjusting the treatment parameters. 3. Alarm and protection: When the pressure exceeds the preset range, the transmitter triggers the alarm system to protect the safety of equipment and personnel. The pressure transmitter senses the pressure change through a sensing element (such as a piezoelectric sensor or a capacitive sensor) and generates an electrical signal proportional to the pressure. These signals are transmitted to the control system for real-time monitoring and automatic adjustment of system #PressureTransmitter #PlasmaProcessing #ExhaustManagement #ProcessControl #IndustrialAutomation #EnvironmentalSafety #SensorTechnology #PressureMeasurement #GasTreatment #InstrumentationEngineering

Quick fact. 👌📌 📝 Usage in low voltage: This lock is used on low voltage circuit breakers, such as the ABB SACE Tmax breaker shown in the image, to ensure that power is not reconnected while working on the electrical circuit.