| Application: | Electronic, Instrument, Position Sensor |
|---|---|
| Type: | Current Transformer |
| Phase: | Single |
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transformer is an electrical device used to convert high voltage or high current into low voltage or low current for the purpose of measurement and protection of power systems. Transformers typically consist of a core and coils, with the coils wound around the core. When the current or voltage passing through the transformer changes, the current or voltage in the coils also changes accordingly. This change can be measured and recorded to monitor the status and performance of the power system.
The main function of a transformer is to convert high voltage or high current into low voltage or low current for measurement and protection of power systems. In power systems, high voltage and high current can pose risks to equipment and personnel, so it is necessary to convert them into low voltage and low current for measurement and monitoring. Transformers can also be used for the protection of power systems. For example, when a fault occurs in a power system, transformers can detect abnormal changes in current or voltage and trigger protective devices to ensure the safety and stable operation of the power system.DAHU electrical specializes in the production of 0.5-40.5kv transformers. It has cooperated with many national power bureaus for 10 years and exported to foreign markets. If there is any quality problem within the warranty period, it can be replaced free of charge.
Outdoor Potential Transformer (PT)
Definition and Role: Voltage transformer (PT) is mainly used to convert high voltage into low voltage (usually 100V) suitable for instruments or relays, for measuring line voltage, power and electrical energy, or for protecting valuable equipment in the line in case of line failure.
Structure: PT consists of primary winding, secondary winding, iron core terminal and insulation support.
Working Principle: The working principle of PT is similar to that of ordinary transformer with no-load condition, which realizes voltage transformation by changing the ratio of winding turns.
Technical parameters: in the 110kV and above voltage level system, PT usually has two secondary windings, rated phase main secondary winding voltage is 100/31/2V.
Step-down transformer
Definition and function: Step-down transformers are used to reduce high voltage to a voltage level suitable for the safe use of the consumer, e.g. to reduce a voltage of more than 100,000V to a three-phase, four-wire system of 380V.
Technical parameters: The technical parameters of step-down transformer include rated capacity, rated voltage, no-load loss, no-load current, short-circuit loss and so on. For example, the no-load loss of S9-M-800/6 step-down transformer is 1400W, load loss is 7500W, no-load current is 0.8% and impedance voltage is 4%.
PT and VT (voltage transformer)
PT (Voltage Transformer): Used to convert high voltage to low voltage for measurement and protection systems.
VT (Voltage Transformer): Similar in function to the PT, also used for voltage conversion, but specific models and parameters may differ.
There are many types of transformers, including current transformers, voltage transformers, and combination transformers. Different types of transformers are suitable for different power systems and application scenarios. For example, current transformers are typically used to measure current in power systems, while voltage transformers are used to measure voltage. Combination transformers can measure both current and voltage simultaneously, enabling comprehensive monitoring and protection of power systems.
In summary, transformers are essential devices in power systems. They convert high voltage or high current into low voltage or low current for measurement and protection of power systems. Different types of transformers are suitable for different power systems and application scenarios, helping to achieve comprehensive monitoring and protection of power systems.
| Bated primary current(A) |
Batod primary current(A) |
Ratod secondary output(VA) | 1s themal current(kA) | Rateddynamic current(kA) | ||
| 0.2S | 0.2(0.5) | 10P | ||||
| 5 | 0.2S/10P10 0.28/10P15 0.2/10P10 0.2/10P15 0.5/10P10 0.5/10P15 |
10 | 10 | 15*,20 | 0.5 | 1.25 |
| 10 | 2.5 | |||||
| 15 | 1.5 | 3.75 | ||||
| 20 | 3 | 7.5 | ||||
| 25 | 3.75 | 9.3 | ||||
| 30 | 4.5 | 11.2 | ||||
| 40 | 6 | 15 | ||||
| 50 | 7.5 | 18.7 | ||||
| 75 | 10 | 25 | ||||
| 100 | 15 | 37.5 | ||||
| 150 | 22.5 | 56 | ||||
| 200 | 31.5 | 80 | ||||
| 300 | 10*,15 | 45 | 122.5 | |||
| 400 | ||||||
| 500 | 63 | 130 | ||||
| 600 | 80 | 110 | ||||
| 800 | 15*,30 | |||||
| 1000 | ||||||
| 1200 | 100 | 160 | ||||
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