Products

YB27-12/0.4 Prefabricated Substation

The YB27-12/0.4 prefabricated substation is a domestically produced American-style packaged substation. As an essential power supply unit in cable-based distribution networks, this product is a complete, pre-assembled unit integrating high-voltage control, protection, transformer, and distribution equipment. It is widely used in both urban and rural distribution networks. The product houses high-voltage load switches and high-voltage fuses in transformer oil, and comes in two structural configurations: either with the high-voltage components housed in the same enclosure as the transformer body, or in a separate enclosure.

Category:

Box-Type Substation

Tel:

+86-370-2020101

E-mail:

1074477171@qq.com

Inquiry

Introduction

Product Overview

　　The YB27-12/0.4 prefabricated substation is a domestically produced American-style packaged substation. As an essential power supply unit in cable-based distribution networks, this product is a complete, pre-assembled unit integrating high-voltage control, protection, transformer, and distribution equipment. It is widely used in both urban and rural distribution networks. The product houses high-voltage load switches and high-voltage fuses immersed in transformer oil, and comes in two structural configurations: either with the high-voltage components housed in the same enclosure as the transformer body or in a separate enclosure. The oil tank features a fully sealed design and is equipped with components such as an oil thermometer, oil level gauge, pressure gauge, pressure relief valve, and drain valve to monitor the transformer’s operating condition.

　　To better meet the actual requirements of China’s power grid, the company has also introduced a plug-in dry-type fuse. The melting of the fuse element does not affect the performance of the transformer oil. Depending on the complexity of low-voltage feeder requirements, the YBM-12/0.4 model is available in three enclosure types: standard, enhanced, and comprehensive, enabling users and design institutes to make more flexible and cost-effective selections.

Model and Meaning

Operating environment conditions

◆ Ambient temperature: -30 ℃ ~ 40 ℃;

◆ Altitude: ≤ 1000 m;

◆ Wind speed: Equivalent to 34 m/s (not exceeding 700 Pa);

◆ Humidity: Daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 95%.

◆ Seismic resistance: Horizontal acceleration no greater than 0.4 m/s² ² The vertical acceleration shall not exceed 0.15 m/s². ²;

◆ Installation tilt angle: <3°;

◆ Installation environment: The surrounding air must not be significantly contaminated by corrosive or flammable gases, and the installation location must be free from severe vibrations.

◆ If your order for this product exceeds the above-mentioned conditions, please feel free to consult with our company.

Main Technical Parameters

Rated Parameters of the Product

Rated voltage: 10 kV / 0.4 kV High-voltage switch thermal stability capacity: 20 kA / 26

Rated voltage on the high-voltage side: 10 kV Rated short-circuit breaking capacity of the low-voltage main circuit breaker: 35 kA

Maximum voltage on the high-voltage side: 12 kV Rated short-circuit breaking capacity of low-voltage distribution circuit breaker: 35 kA

Low-voltage rated voltage: 0.4 kV High-voltage load switch transfer current: >1500 A

Rated frequency: 50 Hz Noise level: <50 dB Insulation class: (see table below)

Insulation level
Rated Voltage (kV)	10			0.4
Rated Voltage (kV)	Transformer	Switch to ground and between phases	Between the switch isolation contacts	0.4
Power-frequency withstand voltage (kV)	35	42	48	2.5
Impulse withstand peak (kV)	75	75	85	-

Performance Levels of Oil-Immersed Transformers in the S9, S10, and S11 Series for 10 kV Prefabricated Transformer Substations
Serial number	Rated capacity (KVA)	Rated voltage		Voltage regulation range (%)	Connection group Label	No-load current (%)		Loss (W)					Impedance Voltage (%)	Noise (dB)	Temperature rise
		High voltage	Low pressure			No-load current (%)		No-load			Load
		(KV)	(KV)			S9	S10/S11	S9	S10	S11	S9	S10/S11
1	30	6 3 10	0.4 (0.69)	± 5 (± 2 × 2.5)	Yyn0	2.2	2.0	130			600		4	55	Top Department Oil Warm 60° Line Circle 65°
2	50					2.0	1.8	170			870
3	63					1.9	1.5	200			1040
4	80					1.7	1.2	250			1250
5	100					1.6	1.1	290			1500
6	125					1.5	1.0	340	270		1800
7	160					1.4	1.0	400	310		2200
8	200					1.4	0.8	480	375		2600
9	250					1.2	0.8	560	455	400	3050	3000
10	315					1.1	0.7	670	540	475	3650	3600
11	400					1.0	0.7	800	650	570	4600	4200
12	500					1.0	0.6	960	775	680	5100	5000
13	630					0.9	0.6	1200	920	800	6200	6000	4.5
14	800					0.8	0.6	1400	1120	980	7500	7400
15	1000					0.7	0.5	1700	1320	1150	10300	9860
16	1250					0.6	0.5	1950	1560	1360	12800	12000
17	1600					0.6	0.5	2400	1880	1640	14500	14000

Note: a. According to customer requirements, the high-voltage tap range of the transformer can be designed as ±2 × 2.5%.

B. According to customer requirements, the low-voltage side of the transformer can be designed as 0.69 kV.

Load Switch Performance Parameter Table
Rated current (A)	Rated voltage (KV)	Impulse withstand voltage (KV)	Power-frequency resistance By voltage (1 min. kV)	Rated short-time Withstand Voltage (Note/)	Short-circuit disconnection Current (Ka)	Rated peak resistance Current (Ka)	Load operation Number of times	Mechanical operation Number of times
315	12	75	42	12.5/2	31.5	31.5	100	2000
630	12	75	42	16/4	40	40	100	3000