In the iron core, the part of the winding is called “core column” , and the part of the magnetic circuit that does not have the winding is called “Iron Yoke” . Where iron core around the winding is called Shell Type; where the winding around...

Zero sequence current protection is generally suitable for TN ground system. For a TN-S system, the ID loop impedance includes the phase line impedance Z1, the Pe Line impedance Zpe and the contact impedance ZF, namely zs = Z1 + Zpe + Zf; for a TN-C system, the ID...

The secondary side is absolutely not allowed to open the circuit, because once the open circuit, the primary side current I 1 all become magnetized current, cause M and e 2 sudden increase, cause core oversaturation magnetization, heat serious and even burn out the...

1) the insulation of the current transformer is very thick, some insulation wrapping is loose, there are creases between the insulation layers, in addition, the vacuum treatment is bad, the impregnation is not complete and causes the air-containing cavity, thus easy...

The low-voltage double-winding current transformer can not only output 5A or 1A for ammeter measurement, but also output 0-20mA low-current signal, so it can be used in telemetry system to collect and upload directly and realize the remote measurement of current...

The specific application of zero-sequence current protection can be three-phase line with a current transformer (CT) , or three-phase wire through a zero-sequence CT, can also be neutral line n on the installation of a zero-sequence CT, using these C. T to detect the...