Supplying quality LCZ-35 high-voltage current transformer

This product is made of epoxy resin casting, insulation, and stable performance. LCZ-35 outdoor current transformer Overview LCZ-35 current transformer is semi-enclosed insulating molding products for a nominal frequency of 50Hz or 60Hz, rated voltage of 35kV and below the power system, as power measurement, current measurement and relay protection use. This product complies with IEC44-1 and GB1208 "CT." LCZ-35 current transformer type current mutual structure of the current semi-enclosed pillar structure, a winding poured in epoxy resin, the exterior of the secondary winding and core. LCZ-35Q current transformer strengthen the outer insulation products for the working conditions. LCZ-35G applies to a width of 1.2 meters of switchgear. LCZ-35 current transformer ratio parameter Rated primary current (A) Rated secondary current (A) Combined accuracy classes Rated output (VA) Rated short time thermal current (Ith) (kA) Rated dynamic current (Idyn) (kA ) 20 5 0.2 / 10P10 0.2 / 10P20 0.5 / 10P10 0.5 / 10P20 10P10 / 10P10 10P20 / 10P20 0.2 / 0.5 / 10P10 0.2 / 0.5 / 10P20 0.2 / 10P10 / 10P10 0.2 / 10P10 / 10P20 0.5 / 10P10 / 10P10 0.5 / 10P10 / 10P20 20/50 20/25 50/50 50/25 50/50 25/25 15/50/50 15/50/25 15/25/50 15/25/25 50/25/50 50/25/25 1.3 3.25 3,025,403 7.5 50 4.5 11.5 756,151,009 22.5 150 12 3,020,018,453,002,460,400 3,690,600,481,208,001,000 1200 1500 1 rated secondary current, accuracy combination, rated output and dynamic and thermal current see Table 2, rated insulation level: 40.5 / 95/185 Kv 4, product partial discharge levels consistent with GB1208 "current transformer" standards. 5. Pollution Level: Overall Performance products meet the requirements of grade Ⅱ filthy. 6, can be customized non-standard products. Use Principle 1) shall comply with the wiring of the current transformer series principles: the first winding in series with the circuit under test, and the secondary winding is connected in series with the load of all the instrument 2) Press the measured current size, select the appropriate changes, otherwise the error will increase. Meanwhile, the secondary side end must be grounded to prevent damage in the event of insulation, the primary high-voltage fleeing into the secondary low pressure side, resulting in personal and equipment accidents 3) the secondary side and definitely not open, because once open, all of the primary current I1 become magnetizing current, causing φm and E2 surge, causing excessive core saturation magnetization, severe fever and even burned coil; at the same time, after over-saturation magnetization of the magnetic circuit, the error increases. In normal operation the current transformer secondary side is similar to short-circuit, if it suddenly open, the excitation force by the value of small value sudden change of great value in the core saturation flux presents serious flattened wave, so the secondary winding through zero magnetic induction in a very high steeple wave, its value can reach thousands or even tens of thousands of volts, endangering the safety of the insulation performance of staff and the instrument. In addition, the secondary side open the secondary side voltage of several hundred volts, when it comes to electric shock. Thus, the current transformer secondary side are equipped with short-circuit switch, to prevent secondary side open. During use, the secondary should be immediately removed once the open-circuit load, then again the processing power. Everything before reuse treated well. 4) In order to meet the measurement instruments, relay protection, breaker failure and the need to determine fault filtering device, are located in generators, transformers, qualify, bus section breaker, breaker bus bypass circuit breakers 2 to 8 secondary winding of the current transformer. 5) For the protection provided by the current transformer location of protected areas should try to eliminate the main protection device to set. For example: If two current transformers, and the location allows, it should set on both sides of the circuit breaker, the circuit breaker in the midst of the scope of cross-6) In order to prevent the strut type current transformer bushing flashover caused by bus fault current Transformers usually arranged in a circuit breaker or transformer outlet side 7) In order to reduce the damage inside the generator failure for automatic adjustment of the current transformer excitation device should be arranged at the outlet side of the generator stator winding. For ease of analysis and internal faults found before the generator incorporated in the system for measuring instruments current transformer should be installed in the generator neutral side.