Prefabricated substation (American style)

NegotiableUpdate on 05/14

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Prefabricated substation (American style)

Product Details

1、 Product Overview

As the name suggests, high and low voltage distribution cabinets are distribution equipment used in power supply systems for energy distribution, control, metering, and cable connection. Generally, power supply bureaus and substations use high voltage switchgear,
Then, the low-voltage side of the transformer is stepped down and led out to the low-voltage distribution cabinet. The low-voltage distribution cabinet is connected to various power distribution panels, control boxes, and switch boxes. Inside, some switches, circuit breakers, fuses
A power distribution device that integrates protective devices such as buttons, indicator lights, instruments, and wires to meet the design functional requirements. Commonly known as high and low voltage switchgear or complete sets of high and low voltage electrical equipment.

2、 Model and meaning

3、 Normal usage conditions

1. Surrounding air temperature:- 15C~+40C.
2. Altitude: 1000m and below.
3. Humidity conditions:
The daily average value shall not exceed 95%, and the daily average value of water vapor pressure shall not exceed 2.2KPa.
The monthly average value shall not exceed 90%, and the monthly average value of water vapor pressure shall not exceed 1.8KPa.
4. Seismic intensity: not exceeding 8 degrees.
5. Places without obvious pollution such as corrosive or flammable gases.
Note: When the above normal usage conditions are exceeded, users can negotiate with our company.

4、 Characteristics of container structure

1. The transformer adopts a split box structure:
The transformer body, high-voltage load switch, plug-in fuse, backup current limiting fuse and other high-voltage components are placed in sealed oil tanks, arranged horizontally on both sides of the two boxes, completely separated by partitions. The partitions have insulated through wall sleeves for the connection between the transformer and the load switch, which can be easily removed and replaced without affecting the use of the other box.
2. Advantages of arranging two boxes left and right:
(1) Two boxes do not affect each other:
To prevent the upper oil from flowing into the bottom oil tank due to leakage, resulting in a shortage of oil in the upper oil tank (shortage or lack of oil can cause the operation load switch to arc, posing a danger to equipment and personnel);
Another advantage is that the left and right layout is convenient for maintenance. When the transformer room and load switch room are under maintenance, the two boxes do not affect each other, which is convenient and fast (the transformer oil tank needs to be completely removed before the transformer oil tank can be opened for maintenance, which is extremely inconvenient).
(2) The split box structure solves the pollution problem of transformer oil caused by load switch operation and fuse melting.

5、 Technical parameters

Serial Number	name	unit	Technical Parameter
1	rated voltage	kV	10/0.4 (high/low voltage)
2	maximum working voltage	kV	12 (High Voltage Side)
3	Rated frequency	Hz	50
4	rated capacity	KVA	150-1600
5	1-minute power frequency withstand voltage	kV	35
6	lightning impulse voltage	kV	75
7	Cooling method		ONAN
8	High voltage backup fuse breaking current	kA	50
9	Plug in fuse for breaking current	kA	2.5
10	ambient temperature	℃	-35~+40
11	Coil allows temperature rise	K	65
12	No load voltage regulation		+50% or 2×2,5%
13	noise level	db	20
14	protection grade		IP43

6、 Load switch

The load switch is oil immersed, three-phase linkage switch, and spring operated mechanism; It can be operated with load for opening and closing, and its opening and closing speed is independent of the magnitude of the operating force. There are two station and four station T-switches availableV-shaped workstations are available for selection.

Project/Name		unit	315A	630A
rated voltage		KV	12	12
Maximum current		A	315	630
Rated frequency		Hz	50	50
Rated short-circuit closing current		kA	31.5	50
Rated short-time withstand current		kA	12.5	50
Rated short-time endurance time		S	2	2
mechanical life		order	2000	2000
lightning impulse test	Alternating pairsgrounds	KV	75	75
lightning impulse test	isolating fracture	KV	85	85
1-minute power frequency withstand voltage	Alternating to ground	KV	42	42
1-minute power frequency withstand voltage	isolating fracture	KV	48	48
Rated peak withstand current		KA	31.5	50

seven、Structure and operational sequence

1. Overall layout
The appearance and structure of the 10kV prefabricated substation are shown in Figure 2 and Figure 3. The oil tank is divided into two parts: the upper part is the high-voltage oil tank, and the lower part is the transformer oil tank. The two are only electrically connected, and the oil tank is divided into two partsNo way. The schematic diagram is shown in Figure 1“I”“II”The line is a ring network feeder, branch "II" is a transformer branch, and branch "IV" is a low-voltage output. Substations can be used for bothRing power supply system, also availableUsed in terminal systems, conversion is very convenient. “Ⅰ”The line and“Ⅱ”Switching is carried out between the branch precious electricity and the ring network load switch, and at the same time, a backup protection fuse is installed at the high-voltage side incoming end of the transformerAnd plug-in fuses are used to protect the branch from short-circuit faults and overload and over temperature protection. High voltage display devices and lightning arresters can also be installed. The low voltage end of the transformer is measured by a meterOutput after low-voltage circuit breaker.
2. Transformer
New S9 and S11 series three-phase oil immersed transformers with airLow load loss and temperature riseAdvantages such as low noise, low height, etc. The no-load and load losses of the transformer are lower than those of the original S9 type transformerThe compressor has reached the current advanced level in China. The transformer is a fully sealed structure that effectively isolates insulation degradation caused by atmospheric pollution and moisture. Leave 40-90mm of air at the top of the fuel tankThe cushion, along with the ripples on the fuel tank shell, can simultaneously provide heat dissipation and cooling effects, and effectively reduce internal pressure.

8、 Schematic diagram of prefabricated substation

Serial Number	rated capacity （kVA）	rated voltage		pressure regulating range （%）	Connection group label	no-load current		Loss (W)				impedance voltage （%）	noise （dB）	temperature rise （k）
		high pressure （kV）	low pressure （kV）			S9 S10/S11		no-load loss		load loss
		high pressure （kV）	low pressure （kV）			S9 S10/S11		S9	S10	S11	S9/S10/S11
1	30	6 6.3 10	0.4 0.69	±5 ±2×2.5	Yyn0 Dyn11	2.2	2.0	130	110	100	600	4 4.5	55
2	50					2.0	1.8	170	150	130	870			top Oil temperature 55 coil 65
3	63					1.9	1.5	200	180	150	1049
4	80					1.7	1.2	250	200	180	1250
5	100					1.6	1.1	290	230	200	1500
6	125					1.5	1.0	340	270	240	1800
7	160					1.4	1.0	400	310	280	2200
8	200					1.4	0.8	480	380	340	2600
9	250					1.2	0.8	560	460	400	3050
10	315					1.1	0.7	670	540	480	3650
11	400					1.0	0.7	800	650	570	4300
12	500					1.0	0.6	960	780	680	5150
13	630					0.9	0.6	1200	920	810	6200
14	800					0.8	0.6	1400	1120	980	7500
15	1000					0.7	0.5	1700	1320	1150	10300
16	1250					0.6	0.5	1950	1560	1360	12000
17	1600					0.6	0.5	2400	1880	1640	14500

Note: a. According to user requirements, the high-voltage tap range of the transformer can be designed as±2×2.5%； b. According to user requirements, the low voltage of the transformer can be designed to be 0.69kV

9、 Ordering Notice

The parameters in this plan are the standard configuration provided by our company. If the customer has no specific requirements, the company will supply according to the standard configuration. If it exceeds the requirements of this plan, please explain separately.