1.Features:
- Flexible in installation modes: fixable on primary wire or bottom board;
- Suitable for various primary wires, such as flat-type wires, round wires
or cables;
- Output terminals are standard type with screws, convenient for connecting
wires on the spot;
- Box structure, encapsulated by plastic shell, perfect outline
2.Ambient conditions:
- Ambient temperature: -55...+85°C;
- Relative humidity <90% при 40°C;
- Atmospheric pressure: 860~1060mbar (650~800mmHg approximately);
3.Range of working Frequency: 20Hz~1kHz
4.Insulation Rating: Class B (130°C).
5.Safety features:
- Insulation resistance: >1000MOm in normal condition;
- Insulation withstand voltages: 4000V 50Hz/1min;
- Fire retardancy: In conformity with UL94-Vo
6.Outline Drawing, Installation Dimention and Coil Diagram
Remark: Two support legs to be fixed on bottom board, one support leg with
screws are included in package along with every product.
Installation instruction
Mounted on bottom board:
Take two support legs (included in package along with the product) and insert
them into the sockets as shown in Fig. below. The center distance between the
mounting holes is 57x51; The diameter of the mounting hole for the support leg
is Ø 5.0, and then use M5 screw to fix the current transformer on the bottom
board.
Mounted on primary wire:
Take one support leg with M5 hole (included in package along with the product)
and insert it into the socket as shown in Fig. below. The center distance between
the M5 hole is 57; fix the current transformer on the primary wire with M5 screw.
7.Typical Usage and Parameters:
The parameters in this application as shown in the upper right Fig. are listed
in table below:
Model |
Rated
Input
current |
Rated
Output
current |
Rated
sampling
resistance |
Rated
sampling
voltage |
Phase
Shift |
Non
Linearity |
Linear
Range |
Withstand
Voltage |
TA7888-1 |
500A |
0.2A |
50 Om |
10V |
<30` |
<0.5% |
>3
times
of
rated
value |
>4kV |
TA7888-2 |
1000A |
0.2A |
100 Om |
20V |
8.Attention:
- The primary of the current transformer must be connected in series with the
loop of the measured current. The secondary should operate in a mode of near short
circuit.
- The secondary of the current transformer is not allowed to be open circuit,
Do Not install any fuse.
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