A power Transformer (Transformer) is a device that can change voltage and current, mainly using the principle of electromagnetic induction. Power transformer models are usually composed of material symbols such as phase number, cooling mode, voltage regulating mode, winding core, transformer capacity, rated voltage, winding connection mode. The following billion electric on the power transformer model in detail on the meaning of the representative.

D - single-phase

S - three-phase

J- oil self - cooling

L- winding is aluminum wire

Z- is also loaded to regulate the pressure

SC- three - phase epoxy casting

SG- three coherent self - cooling

JMB- local lighting transformer

Yd-single-phase transformer for testing

BF(C) - control transformer (C is a C core structure

DDG- single phase dry low voltage high current transformer

Note: the digital part behind the power transformer: the left oblique line indicates the rated capacity (kva); The right side of the slash indicates the primary side rated voltage (kilovolts).

Power transformer model illustration:

1: sjl-1000/10, three-phase oil-immersed self-cooled aluminum wire, two-coil power transformer, rated capacity of 1000 kva, rated voltage of 10 kva on the high voltage side. Power transformer model representation method: basic model + design serial number -- rated capacity (KVA)/ high voltage side voltage.

2: s7-315/10 transformer, namely three-phase (S) copper core 10KV transformer, capacity 315KVA, design number 7 is energy-saving.

3: scr9-500/10, s11-m-100/10, S-- three-phase C-- pouring (dry transformer) r winding type 9 (11) -- design number 500 (100) -- capacity (KVA) 10-- rated voltage (KV) m-- airtight

Models: SCZ SC (B) 9 - XXXX / * * - three-phase solid molding (epoxy pouring) load B - Z - low voltage foil coil 9 - performance level code XXXX - rated capacity (kVA) * * -- high pressure rated voltage transformer winding (by rating fill in) phase number + number + + whether forced oil cooling cycle load + design + load or no serial number + "-" + capacity + high side of the rated voltage.

4: sfpz9-120000 /110 refers to three-phase transformer (the number of omitted windings of double-winding transformer, if it is three-winding, there is another S in the front) the double-winding forced oil circulation air-cooled on-load voltage regulation, the design serial number is 9, the capacity is 120000KVA, the rated voltage of the high voltage side is 110KV.

5: SCB9-2000/10

SC-- three-phase solid forming (epoxy pouring)

B---- -- low voltage foil coil

9---- -- performance level code

2000-- rated capacity

10-- rated high voltage

6: SCB9-2000/0.4 ~ 0.23 Dyn11

This is the model of dry transformer

S is for three phases;

C stands for epoxy resin castable insulation;

B distribution transformer;

2000 is capacity KVA;

0.4-0.23kv rated line voltage and rated phase voltage on the low voltage side;

Dyn11 connection means three-phase triangle connection on the primary side and star connection on the low-voltage side. The low-voltage side voltage is 11 points, that is, the low-voltage side voltage is 30 degrees ahead of the high-voltage side voltage.

Medium frequency transformer and low frequency transformer model description:

(1) naming method of if transformer the naming method of if transformer in transistor radio (amplitude modulation) consists of three parts

The first part: the main name, with several letter combinations to indicate the name, characteristics, purpose.

The second part: external dimensions, expressed by Numbers.

Part three: serial Numbers, represented by Numbers. 1" means if transformer for the first medium discharge,"2" means if transformer for the second medium discharge circuit; "3" means intermediate frequency transformer used in middle amplifier and triplex circuit, the significance of letters used in the main scale and figures used in the external dimension of the model.

(2) model naming method of low-frequency transformer model naming method of low-frequency transformer consists of three parts:

Part 1: main scale, represented by letters.

Part 2: power, expressed in figures.

Part three: serial Numbers, expressed by Numbers.

Other alphabetical order and meanings of power transformer products:

(1) winding coupling mode, meaning: independent (not standard); Lotus root (O).

(2) phase number, meaning: single-phase (D); Three phase (S).

(3) outside the winding insulation medium, meaning points; Transformer oil (not standard); Air (G) : gas (Q); Formed solid pouring type (C) : wrapped type (CR) : refractory liquid (R).

(4) types and meanings of cooling devices; Natural circulation cooling device (not standard) : air cooler (F) : water cooler (S).

(5) oil circulation mode, meaning: natural circulation (not marked); Forced oil circulation (P).

(6) winding number, meaning points; Double winding (non-standard); Three winding (S); Double split winding (F).

(7) pressure regulating mode, meaning points; No excitation voltage regulation (not standard) : load regulation depression (Z).

(8) coil wire material, meaning: copper (not standard); Copper foil (B); Aluminum (L) foil (LB).

(9) core material, meaning; Electrical steel sheet (not standard); Amorphous alloy (H).

(10) special use or structure, meaning points; Sealed type (M); (C) in series; Starting operation (Q); Lightning protection (B); Adjust volume with (T); High impedance (K) traction for ground station (QY); (Z) for low noise; Cable outlet (L); (G) for isolation; Capacitor compensation (RB); Field power photo.

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