Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Inductance

Never water, streaky.

The low-voltage current transformer is a device that can convert high AC current into an easily controlled low-current device with excellent performance and stable accuracy. It is the most commonly used type of current transformer in the market today.

Talking about this time

ACCESS Electric

Product

Low voltage current transformer

Selection problem.

1.

Pre-customer requirements

a.

Determine the rating.

b.

Customers wear bronze or cable.

c.

Bronze size, number of roots (

I

Type bronze medal can only

1

root,

II

,

III

According to the inner diameter, you can have more than one).

d.

Cable size, small change ratio can be accepted.

e.

Maximum case size.

f.

Installation method determined.

2.

Transformer ratio determination

a.

Customer provides ratio specification, engineering department confirms feasibility, and determines the ratio if feasible.

b.

If the customer provides a ratio that cannot be completed, consult with the customer to increase the number of turns or reduce the level requirements. For larger ratios, discuss whether to choose a larger transformer.

c.

Customer provides CAD drawings for selection.

If the selection is an integer such as:

200/5A

Then select

200/5A

.

If it is a small variable ratio integer

40/5A

After confirming with the customer

2

Hey. That is

40/5A

(

2

turns)

If it is a small change than a non-integer

32/5A

Optional after confirmation with the customer

40/5A

(

2

turns)

If it is a big change than a non-integer

380/5A

Optional type is

400/5A

(only can be increased)

d.

In the selection, the inspection range of the factory transformer tester shall prevail, such as

315/5A

The factory can be tested as an optional type, such as

1100/5A

Even if the ratio is large, the factory inspection device cannot detect it and it is not optional.

e.

In the above situation, the customer has already calculated the short-time excess current. When the customer explicitly proposes that the current ratio is the direct measured current, the current selection should be larger than the measured current. Choosing a value around

2/3

of the rated current is more secure.

f.

The factory produces transformers that cannot exceed the operating current

1.1

times the rated current under normal operation, and up to

1.2

times for short periods.

3.

Final model determination

Based on the size and specifications of each sample transformer, the ratio is determined, and the customer confirms and submits it to the marketing department.

For example, order:

BH-0.66Φ30

Window rated current ratio:

200/5

Wear heart count:

1

turn rated output:

5VA

Accuracy level:

0.5

Level installation method:

A

with

D

installation

The order code is:

ACH-0.66-30I-200/5 1

turn

5VA 0.5

level

A+D

installation

Appendix: Selection of conventional transformer models (special models can be contacted by the engineering department)

Keywords: signal indicator, push button switch, transformer, power meter, transfer switch