Type description:

E--Company name: Enboli

J--Voltage transformer

U--Current transformer

S--Three-phase

33--Rated voltage(kV)

Description:

The products(metering box) mainly consists two parts,combined transformer and watt-hour meter tank, 

the former is made up of two or three single-phase voltage transformer and current transformer,which adopts, 

which adopts 25# mutual induct oil as insulating medium and whose primary and secondary line ends are both installed on the panel by porcelain bushing.

Watt-hour meter tank is fixed on the side of combined transformer and comprise one active watt-hour meter and reactive watt-hour meter,

 which has high-precision measurement, light weight, convenient install-action and electricity theft resistance.

The power measuring box is’ applicable to’ three-phase system net with rated voltage of 35kV and rated frequency of 50Hz.

Technical data of metering box):

A. Rated voltage: 33KV

B. Accurate grade: 0.5 and 0.2,0.5S and 0.2S

C. Rated ratio: ratio-voltage 33000/110

             Ratio-current5-300/5 (high ratio-current can made to order)

This product of high-voltage electric measuring tank has two types, single ratio and double ratio.in double ratio wiring case,

heavy current ratio connects AP1,AP2 and CP1,CP2 and light current ratio connects AP3 and CP1,CP3.

The schematic drawing is illustrated as follows:

Overall dimension drawing

Sing ratio wiring diagram:combined transformer+watt-hour meter box

Double ratio wiring diagram:combined transformer+watt-hour meter box

FAQ:

1.How does a watt-hour meter work?

The standard watt-hour meter is similar to a small electric motor running at a speed proportional 

to the amount of electrical current passing through it. 

The motor turns a single rotating disc inside the meter called the "rotor". 

This disc in turn drives a series of gears that move dials on a register.

2. What is watt-hour metering?

watt-hour meter, device that measures and records over time the electric power flowing through a circuit. 

Although there are several different types of watt-hour meters, each consists essentially of a small electric motor and a counter.