1．Features

① It can be used as either a voltage transformer or a current transformer.

② It is capable of being directly welded onto a PCB.

③ It is highly accurate, has a wide sampling range, and is flexible in its applications.

④ It is fully encapsulated, has strong mechanical and environmental endurance, strong dielectric strength, and an elegant outline.

2．Ambient Conditions

① Ambient temperature: -55℃～+85℃;

② Relative humidity: ≤90% at 40℃;

③ Atmospheric pressure: 860～1060mbar(about 650～800mmHg).

3．Operating Frequency Range : 20Hz~20kHz

4．Insulation Thermal Class: Class B (130℃)

5．Safety Features:

① Dielectric resistance: >1000MΩ in normal condition;

② Insulation withstand voltages: 3KV 50Hz/1min (used as a voltage transformer);

6KV 50Hz/1min (used as a current transformer);

③ Fire retardancy: In conformity with UL94-V0.

6．Outline Drawing, Installation Dimension and Coil Diagram:

7．Typical Usage and Technical Parameters

① Used as a voltage transformer

TVA1421 model is actually a current-type voltage transformer when it is used as a voltage transformer. Fig.3 and Fig.4 show the two typical applications, respectively. The parameters are shown in Table 1.

Table 1：

② Used as a current transformer

With a through hole wire inserted as primary input, TVA1421 model can be used as a current transformer, which derives four applicable connections in output as shown in Fig.5, Fig.6, Fig.7 and Fig.8. The parameters are given in Table 2 and Table 3.

Table 2：

Table 3：

8．Attention

Whether used as a voltage transformer or current transformer, it is fundamentally a current-type transformer in principle. Therefore, an open circuit is not permitted in the secondary circuit. For this reason, do not connect any fuse in the secondary circuit.