[Digital ammeter]Model meaning of digital ammeter

[Digital display ammeter] digital display ammeter model meaning how to choose digital display ammeter

Selection of digital ammeter

1. Calculate the current I=2P=86*2=172A according to the load, and then the current transformer with a primary current of 200A can be selected. Of course, the ammeter matches the current transformer, so it is 200/5

2. Transformation ratio: primary current/secondary current of the current transformer (rated 5A)

200/5= 40 times

3. If the current in the line exceeds 120A, it is necessary to use an watt-hour meter and a current transformer. That’s it.

4. The reading of the watt-hour meter * the transformation ratio of the current transformer = the actual electricity consumption

The meaning of the ammeter model of the watt-hour meter:

First, the electric energy meter is the electric energy meter, commonly known as the electric meter.

The meaning of the three-phase electric meter model:

Category code + group code + design serial number + derivative number

1. Category code: D—meter

2. Group code: Indicates phase line: D—single-phase; S—three-phase three-wire active; T—three-phase four-wire active.

Indicated use: A—Ampere hour meter; B—Standard; D—Multi-function; F—Multi-rate; H—Total consumption; J—DC; L—Long life; M—Pulse; S —Full electronic; Y—prepaid; X—reactive power; Z—maximum demand

3. The design serial number is represented by Arabic numerals. Such as 862, 864, 201, etc.

4. Derived numbers have the following representations: T—for both wet and dry use; TH—for wet tropics; TA—for dry tropics; G—for plateaus; H—for marine use; F—for chemical industry Anticorrosion etc.

Such as:

DD—represents a single-phase meter, such as DD862, DD702;

DS—represents a three-phase three-wire active meter, such as DS864, DS8 type;

DT—represents a three-phase four-wire active meter, such as DT862, DT864;

DX—represents a reactive meter, such as DX963, DX862;

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DJ—represents a DC meter, such as DJ1;

DB—represents a standard meter, such as DB2, DB3;

DBS—represents a three-phase three-wire standard meter , such as DBS25;

DZ—represents the maximum demand meter, such as DZ1;

DBT—represents a three-phase four-wire active power standard meter, such as DBT25;

DSF—represents a three-phase three-wire multi-rate time-of-use meter, such as DSF1;

DSSD—represents a three-phase three-wire fully electronic multi-function meter, such as DSSD331;

DDY—Indicates a single-phase prepaid meter, such as DDY59.

Second, the meaning of the ammeter model

The first and second digits represent the model code

L T-electromagnetic system

C- Magnetoelectric system

L-rectifier system

D-electric system

The number after the letter represents the design serial number

A current

V voltage

Hz frequency

cosΦ power factor

kW active power

kvar reactive power

For example, 42 in 42L6-A represents the model code L-rectifier system 6 Design serial number A Current

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