The special current transformer for closed inflatable cabinets is a current measurement device specially designed for Gas Insulated Switchgear (GIS). It differs from conventional current transformers in that it has a closed design.
The enclosed design allows the current transformer to operate in a high-pressure, sealed inflatable cabinet environment. This design effectively prevents the impact of harsh external environments on the current transformer, improves its stability and reliability, and reduces the frequency of maintenance and overhaul.
Special current transformers for closed inflatable cabinets are usually filled with insulating gas, such as hydrogen sulfide gas, to improve the insulation performance. This special filling material can not only effectively isolate the internal components of the current transformer, but also prevent the occurrence of dangerous events such as fires and explosions.
The closed design can also effectively reduce the maintenance needs of the current transformer because its internal components are not easily corroded and damaged by the external environment. This means that the current transformer dedicated to closed inflatable cabinets has a longer service life and more stable performance.
Special current transformers for closed inflatable cabinets usually use digital technology to realize digital processing and output of signals, improve the accuracy and speed of data transmission, and make monitoring and control more flexible and convenient.
Technical data
| Type | use | Measuring current transformer | Protection current transformer | Double winding current transformer | |||||||
| Rated primary current(A) |
Accuracy and rated load (VA) | Acuracy and rated load (VA) | Composite accuracy and rated load (VA) | ||||||||
| 0.2S | 0.2 | 0.5 | 10P15 | 10P10 | 10P5 | 0.2S | 0.5 | 10P10 | 10P5 | ||
| LMZC-10 (LDC-10) |
50 | 2.5 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| 75 | 2.5 | 2.5 | 3.75 | 1 | 2.5 | 1 | 1 | 2.5 | |||
| 100 | 2.5 | 2.5 | 3.75 | 2.5 | 3.75 | 2.5 | 2.5 | 3.75 | |||
| 150 | 3.75 | 3.75 | 5 | 2.5 | 3.75 | 2.5 | 2.5 | 3.75 | |||
| 200 | 3.75 | 3.75 | 5 | 1 | 3.75 | 3.75 | 5 | 1 | 2.5 | ||
| 300 | 5 | 5 | 7.5 | 1 | 2.5 | 5 | 5 | 7.5 | 2.5 | 3.75 | |
| 400 | 7.5 | 7.5 | 10 | 1.5 | 5 | 7.5 | 5 | 7.5 | 3.75 | 5 | |
| 500 | 10 | 10 | 10 | 2.5 | 5 | 7.5 | 5 | 10 | 3.75 | 5 | |
| 600 | 10 | 10 | 10 | 3.75 | 5 | 10 | 7.5 | 10 | 5 | 7.5 | |
| 800-1000 | 15 | 15 | 20 | 5 | 10 | 15 | 7.5 | 15 | 7.5 | 10 | |
| 1200 | 15 | 15 | 20 | 7.5 | 10 | 15 | 7.5 | 15 | 7.5 | 10 | |
Outline Dimension(mm)
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