Current Transformer --10KV Indoor High Voltage

Introduction

Parameters

• Rated primary current: It can be various values such as 100A, 200A, 400A, 630A, 1000A, etc., depending on the specific application requirements. This is the maximum current that the primary winding of the transformer can carry.
• Rated secondary current: Usually, it is 5A or 1A. The secondary current is the output current of the transformer, which is used to connect to measuring instruments, relays, and other devices.
• Rated accuracy class: Common accuracy classes include 0.5, 1.0, 5P, 10P, etc. The accuracy class indicates the measurement accuracy of the transformer. For example, a 0.5 - class transformer has a relatively high accuracy for measurement purposes, while a 5P or 10P class is mainly used for protection relays.
• Rated insulation level: It is designed to withstand the 10KV voltage level and has appropriate insulation capabilities to ensure reliable operation under normal and transient voltage conditions. The insulation level is specified according to relevant standards, such as having a certain withstand voltage value for the primary winding to ground and between windings.
• Rated short - time thermal current and dynamic current: These parameters describe the ability of the transformer to withstand short - circuit currents. The rated short - time thermal current indicates the maximum current that the transformer can withstand for a short period without overheating, and the rated dynamic current represents the maximum current that the transformer can withstand during a short - circuit transient without mechanical damage.

Characteristics

• Excellent insulation performance: The epoxy resin casting insulation provides high - quality electrical insulation, which can effectively prevent electrical breakdown and leakage. It has good resistance to moisture, dust, and chemical corrosion, ensuring reliable operation in indoor environments.
• High accuracy: Through precise design and manufacturing processes, the transformer can achieve high - accuracy current transformation. This is essential for accurate power measurement, metering, and protection in the power system.
• Compact structure: The epoxy resin casting process allows for a relatively compact design, which saves installation space. It is easy to install in indoor switchgear, distribution cabinets, and other equipment.
• Good mechanical strength: The epoxy resin - cast insulation provides excellent mechanical protection to the internal windings and core of the transformer. It can withstand certain mechanical vibrations and impacts, ensuring the stability and reliability of the transformer during operation.
• Low loss and low noise: The use of high - quality core materials and optimized winding design helps to reduce the iron loss and copper loss of the transformer, improving its efficiency. At the same time, the transformer operates with low noise, which is beneficial for the working environment in the substation.