1. Safe Isolation and Protection
Preventing Direct Contact with High Current
Primary currents in substations often reach thousands of amperes. Directly connecting them to measuring instruments or protective devices can damage equipment and even endanger personnel. Current transformer use magnetic coupling to convert high currents into low currents (such as 5A or 1A), achieving safe isolation.
Fast Fault Detection
Protective current transformers can detect current anomalies (such as overloads and short circuits) in real time. The secondary-side signal triggers a protective relay, quickly disconnecting the faulty line and preventing equipment damage.
2. Precision Measurement and Metering Requirements
High-Precision Current Measurement
Metering current transformers convert high currents into standard, low currents for use in power meters, relay protection devices, and other applications, ensuring accurate energy statistics.
Support for High Voltage Level Measurement
Substations typically feature high voltage levels (e.g., 10 kV and above). Current transformers, with their high-insulation core and specialized design, can safely measure high currents and adapt to complex electromagnetic environments.
3. Ensuring Stable System Operation
Protecting Equipment from Harmonic Interference
In applications with high harmonic content, open-type current transformers can collect harmonic signals, providing data support for reactive power compensation devices and improving system stability.
Adaptable to Complex Line Structures
Substation wiring is complex, making conventional instrument transformers difficult to install. Split-type instrument transformers eliminate the need to disassemble cables and can be quickly deployed, meeting urgent retrofit needs.
4. Standardization and Economy
Unified Secondary Circuit Standards
The standardized secondary current of 5A or 1A simplifies instrument production and maintenance, reducing system costs.
Flexible Adaptation to Various Scenarios
By choosing different current transformer models (such as cable-type and bushing-type), the measurement and protection requirements of various substation equipment (such as circuit breakers and transformers) can be met.
In summary
Current transformers ensure safe and efficient operation of power systems in substations through isolation, protection, measurement, and standardization, making them an indispensable key device in power engineering.
Shaanxi West Power Tongzhong Electrical Co., Ltd.
Our address
Nanpo Village, Chencang Avenue Jintai District Baoji City, Shaanxi Province, China.
Phone Number
+86 18091767067(WhatsApp/Wechat)
