FN7-12D 12KV LBS indoor Medium voltage load break switch with earthing switch
ABB NAL series 12KV LBS medium voltage load break switch for RMU similar as
12KV MV Outdoor Off-Load overhead line isolator disconnector LBS load break switch
As a protection and control unit for power grid equipment and industrial and mining enterprise power design
Mainly used for opening closing the power system load current, overload current and short - circuit current
12KV MV VCB outdoor high voltage vacuum circuit breaker with controller
Transformer is one of the important electrical equipment in power system, it is similar to power transformer, is used to convert circuit voltage or current. However, the purpose of the power transformer switching voltage and current, is to transfer the power, voltage or current transformer transformation, the purpose of measuring and monitoring circuit voltage or current. In general, power transformer capacity is big, the change of the voltage or current error, transformer capacity is small, the change of the voltage or current error is small. In the measuring circuit, which is used to convert current, the current meter and relay is called a current transformer, power transformer is used to convert voltage, the voltage meter and relay of power transformer is called voltage transformer.
This series of Product is of single phase and outdoor type, is applicable to AC power systems of rated voltage of 35,68,110 and 220kV and rated frequencyis50Hz，used for voltage measuring, relaying protection and automatic monitoring. Earthing mode of running system of transformers of 35 and 66 kV is neutral point ineffective earthing system; earthing mode of running system of transformers of 110 and 220kV is neutral point effective earthing system.
JDC5- 220 type voltage transformer is of full-sealed cascade oil- paper insulated, single-phase three- winding outdoor used, is applicable to neutral point effective earthing systems of rated frequency 50Hz and 220k, used for voltage and electric energy measuring and relaying protection.
JDC5- 220 type voltage transformer is of full-sealed cascade oil- paper insulated, single-phase three- winding outdoor used, is applicable to neutral point effective earthing systems of rated frequency 50Hz and 220k, used for voltage and electric energy measuring and relaying protection.
JDC5- 220 type voltage transformer is of full-sealed cascade oil- paper insulated, single-phase three- winding outdoor used, is applicable to neutral point effective earthing systems of rated frequency 50Hz and 220k, used for voltage and electric energy measuring and relaying protection.
JDCF- 220W1 type voltage transformer is of full-sealed cascade oil-paper insulated, single -phase four-winding outdoor used, is applicable to neutral point effective earthing systems of rated frequency 50Hz and 220ly, used for voltage and electric energy measuring and relaying protection.
LVB-220W2 type inverted type current transformer is applicable to power systems of 5oOHz and 220W, used for current, electric energy and relaying protection.
This type of current transformer is applicable to electric power systems of 220kV and 5OHz, used for current, electric energy measuring and relaying protection.
This type of transformer is of outdoor type, is applicable to electric power systems of 5oHz and 220ky, used for current, electric energy measuring and relaying protection.
JDC6-110 type voltage transformer has single-phase three -winding cascade insulating structure, it is applicable to neutral point effective earthing systems of rated frequency 50Hz and 110kV, used for voltage, electric energy measuring and relaying protection.
JDC6-110 type voltage transformer has single-phase three -winding cascade insulating structure, it is applicable to neutral point effective earthing systems of rated frequency 50Hz and 110kV, used for voltage, electric energy measuring and relaying protection.
The classification of the transformer:
According to the principle of classification: can be divided into capacitive voltage transformer and voltage transformer electromagnetic voltage transformer, current transformer are electromagnetic current transformer.
According to the winding insulation medium classification, there are dry, pouring, oil-immersed and inflatable (SF6).
According to use classification: can be divided into two broad categories, voltage transformer, current transformer, can divide again for measuring, protection, special purpose and precise four classes.
According to the installation site classification: can be divided into indoor type and outdoor type two kinds.
According to the number of phase voltage transformer classification: can be divided into two kinds of single-phase, three-phase.
Voltage transformer windings by several categories: duplex winding, three-winding two kinds.
The classification of the current transformer according to the installation method: wear a wall type, support type and loading type 3 kinds.
The classification of the current transformer according to the current ratio: a single variable ratio and changeable than two.
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