LZZBJ-27.5(GYW1) type current transformerDetailed product description：

LZZBJ-27.5 (GYW1) current transformer is suitable for areas with an altitude of 1000m and below, and high-altitude products are suitable for areas with an altitude of 2500m and below. It is used for precision electrical measurement and relay protection in power systems with a frequency of 50Hz and a maximum operating voltage of 40.5kV.
Environmental temperature: The normal type is+40 ℃~-15 ℃; The plateau type ranges from+25 ℃ to -15 ℃.
Product type: Indoor.
Atmospheric conditions: There is no pollution or explosive medium in the installation site that seriously affects the insulation of the transformer.
The installation site has no severe vibrations or bumps.
Open circuit is not allowed during product operation, otherwise there is a high voltage hazard.
The temperature during transportation and storage ranges from+40 ℃ to -15 ℃.

Technical parameters of LZZBJ-27.5 (GYW1) current transformer

Product execution standard: GB1208-1997 "Current Transformers".
Rated secondary current: 5A and 1A.
Instrument security factor: 0.2S level FS ≤ 5; Level 0.2 and 0.5 FS ≤ 10.
Insulation and heat resistance grade: Grade E.
Secondary structure: two coils, three coils, four coils.
The rated secondary lower limit load is 25% of the rated secondary load.
The rated primary current value, rated secondary load, accurate limit coefficient, rated short-time current value, level combination, and weight are listed in the following table. Please consult with the manufacturer for special specification products.

insulation level

Ordinary type: 40.5/95/185kV Plateau type: 40.5/110/226 kV (below 2500m)

accuracy level

0.2S、0.2、0.5、 5P、10P

Partial discharge capacity

The applied voltage is 80% of the power frequency withstand voltage, and after 60 seconds, it drops to the measured voltage of 28 kV with a discharge capacity of ≤ 20pC.

rated once current （A）

Rated secondary load (VA) COS φ=0.8

5P and 10P level standards Limit coefficient

1S short-term Thermal current （kA）

Dynamic stability current （kA）

0.2S

zero point two

zero point five

5P、10P

1A

5A

1A

5A

1A

5A

1A

5A

1A

5A

twenty

ten

thirty

ten

thirty

ten

thirty

thirty

fifty

ten

ten

two point five

six point three

thirty

four point five

twelve

forty

six point three

sixteen

fifty

eight

twenty

seventy-five

twelve point five

thirty-one point five

one hundred

twenty-two point five

fifty

one hundred and fifty

twenty-five

sixty-three

two hundred

thirty-one point five

eighty

300~500

forty-five

one hundred and ten

600~1500

sixty-three

one hundred and thirty

1. Two coils: Appearance: 405 × 300 × 550 (length × width × height), Level combination: 0.2S/0.2S; 0.2S/5P。
2. Three coils: Appearance: 420 × 300 × 550 (length × width × height), Level combination: 0.2S/0.2S/0.2S; 0.2S/0.2S/5P。
3. Four coils: Appearance: 480 × 300 × 550 (length × width × height), Level combination: 0.2S/0.2S/0.2S/0.2S; 0.2S/0.2S/5P/5P。
4. The measurement levels are interchangeable, and special products with two coils can also be produced using three coil and four coil shapes.

LZZBJ-27.5 (GYW1) type current transformer