The zero sequence current transformer for power system grounding current and zero sequence relay protection devices or signal device with the use of the device, action, realize the protection or monitoring.
YX－LJ series of zero sequence current transformer is the cable type, use of ABS engineering plastic, resin pouring into sealing, good insulation performance, beautiful appearance, has the advantages of high sensitivity, good linearity, reliable operation, convenient installation, zero sequence current and its performance is better than the general transformer. A wide range of applications, not only meet the electromagnetic type relay protection, can adapt to electronic and microcomputer protection device, the user can according to the operation mode (neutral point grounding, neutral non grounding, high resistance grounding, low resistance grounding, arc suppression coil grounding) zero sequence current transformer by selecting suitable.
(two), model description
(three), conditions of use
1, the environment temperature: - 10 ℃ ~ average temperature 60 ℃, not more than +40 ℃;
2, elevation ≤ 1000m (plateau when using special orders);
3, the relative humidity is below 85%;
4, the surrounding medium no conductive dust and conductive metallic or insulating corrosive gases, such as mold damage.
(four), product categories and the main data
1, voltage: 0.38 ~ 66KV;
2, the power frequency: 50Hz;
3, the same name end, a transformer "L1" into the positive side, two times for "K1";
4, models and data, see chart size.
(five), installation
1, the integral transformer installation to be carried out in the installation of the cable, the cable laying through transformer.
2, open type transformer installation can be carried out at any time, the following specific installation method:
(1), remove the transformer "K1", "K2" connection tablet.
(2), the transformer top two inner six corner loosen bolts removed, the transformer is divided into two parts.
(3), the transformer is sheathed on the cable, the two contact surfaces clean, coated with a thin layer of antirust oil, the transformer two part and screw on the six angle bolts, transformer two part should be aligned so as not to affect the performance of.
(4), the connecting piece is fixed in the "K1", "K2".
(six), customization
Due to the rapid development of power system, operating a variety of ways, protection and device types emerge in an endless stream, and a large number of import protection device, the zero sequence current transformer type are many, the company can be based on user needs, design and production of all kinds of transformer zero sequence current transformer and various holes and its supporting protection device transmission sensor.
(seven), order note
1, product type, hole diameter (mm);
2, a zero sequence current, two current (or current);
3, two times the load capacity and load impedance;
4, accurate limit value, accuracy class (if any).
