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YB27 Green Electrical Transformer Box

Rated voltage : HV equipment10KV and 12KV, LV equipment 0.4 KV.Rated current :HV equipment 630A, LV equipment 1500A.

Designed for urban and rural power networks, it features a fully sealed and insulated structure with the HV load switch and fuse immersed in transformer oil. Its space-saving design occupies only 1/3–1/5 of the footprint of European-style substations of equivalent capacity. Suitable for high-rise buildings, residential communities, industrial parks, and temporary sites, it offers high reliability, low loss, quiet operation, and strong overload capability.

Standard: IEC1330

Selection

Operating conditions

1. Ambient air temperature: -30℃ ~+40℃

2. Altitude: ≤1000m

3. Wind speed:34m/s ≤700pa

4. Relative humidity: Daily average relative humidity ≤95%.Monthly average relative humidity ≤95%.

5. Installation inclination: ≤grade 8

6. Applicable in the places without corrosive and flammable gas. Note: Customized products are available.

Features

Compact & Eco-Friendly Design: Saves space and reduces environmental footprint.

Fully Sealed & Insulated: Enhances safety by eliminating exposed live parts.

Flexible Connection: Supports both loop and terminal HV configurations.

High-Efficiency Transformer: Low loss, low noise, high overload and short-circuit resistance.

Modular Connectors: Equipped with fully insulated ZnO surge arresters and 200A loadbreak elbows for hot-swapping.

Technical data

1. Rated voltage: 10kV/0.4Kk

2. High voltage side rated voltage: 10kV

3. High voltage side max voltage: 12kV

4. Low voltage side rated voltage: 0.4kV

5. Rated frequency: 50Hz

6. High voltage switch thermal stability capacity: 20kA/26

7. Low voltage main circuit breaker rated short circuit breaker capacity: 35kA

8. Low voltage output circuit breaker rated short circuit breaker capacity: 35kA

9. High voltage load switch transfer current: 1500A

10. Selection of neutral earthing bus

Technical data

Rated voltage
(kV)		 10 0.4
Transformer Switch to ground
and interphase		 Switch isolation
between fracture
Power frequency
withstand voltage(kV)		 35 42 48 2.5
The peak impact
resistance(kV)		 75 75 85 /

11.Noise level: 50dB

12.Box shell protection grade: Not less than IP3X

Overall and mounting dimensions(mm)

YB27-12/0.4 prefabricated substation standard type Overall and mounting dimensions(mm)

  Capacity (kVA) A B C D E F H
Standard type 100-250 1900 1650 1250 650/800 600 1410/1560 1450
315 1900 1650 1350 650/800 650 1460/1610 1450
400-500 1900 1750 1450 650/800 650 1490/1640 1550
630 1900 1750 1550 650/800 700 1580/1730 1550
800 1900 1850 1550 650/800 700 1640/1790 1650
1000 1900 1850 1650 650/800 700 1640/1790 1650

YB27-12/0.4 prefabricated substation extra-strength type Overall and mounting dimensions(mm)

  Capacity (kVA) A B C D E F H
Extra-Strength type 100-250 2400 1650 1250 800 600 1560 1450
315 2400 1650 1350 800 650 1610 1450
400-500 2400 1750 1450 800 650 1640 1550
630 2400 1750 1550 800 700 1730 1550
800 2400 1850 1550 800 700 1790 1650
1000 2400 1850 1650 800 700 1790 1650

YB27-12/0.4 prefabricated substation comprehensiveness type Overall and mounting dimensions(mm)

  Capacity (kVA) A B C D E F G M N
Comprehensiveness type 100-250 2400 1750 1250 800 600 1750 1450 950 550
315 2400 1750 1350 800 650 1750 1450 950 550
400-500 2400 1850 1450 800 650 1750 1550 950 550
630 2400 1850 1550 800 650 1750 1550 950 550
800 2400 1950 1550 800 650 1750 1650 950 550
1000 2400 1950 1650 800 700 1750 1650 950 550

Foundation drawing

Standard type and extra-strength type

 

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