ZGS-12 American style pre-fabricated box-type substation
Product Introduction:
ZGS-12/0.4 series of American prefabricated box-type substation is developed in combination with the actual situation in China. The whole product has the characteristics of small size, easy installation and maintenance, low noise, low loss, anti-theft, strong overload capacity, full protection, etc. Applicable to new residential areas, green belts, parks, station hotels, construction sites, airports and other places….
Summarize
This product is combined with the actual situation of domestic research and development, the whole product has the characteristics of small size, easy installation and maintenance, low noise, low loss, anti-theft, overload capacity, full protection and so on. Applicable to new residential areas, green belts, parks, station hotels, construction sites, airports and other places.
ZGS-12 series American prefabricated box substation, suitable for 10kV loop power supply, dual power supply or terminal power supply system, as a power transformation, metering, compensation control and protection device.
Function and characteristics
◇ Fully insulated, fully sealed, no less maintenance, reliable guarantee of personal safety;
◇ Compact structure, the volume is only 1/3-1/5 of the same capacity, low height;
◇ Can be divided box structure, to avoid the oil pollution in the transformer tank;
◇ High voltage side adopts double fuse full range protection, greatly reducing the cost:
◇ Both can be used for ring network, can also be used for terminal, cable head can be in 200A load current emergency plug;
◇ The box adopts honeycomb double sandwich composite plate, temperature insulation and heat dissipation function;
◇ Low voltage side is equipped with electronic phase loss protector, when there is abnormal voltage in the system, it can quickly break the main inlet switch;
◇ High voltage side oil-immersed load switch or SF6 load switch, which can be electrically upgraded, laying the foundation for realizing the automation of distribution network.
◇ Adopt oil-immersed S9 or S11 series transformers with better performance.
Normal service condition
◇ Altitude does not exceed 1000m;
◇ Ambient temperature: -35℃~+40℃;
◇ Relative humidity: the daily average is not more than 95%, the monthly average is not more than 90%;
◇ Installation site: no fire, explosion danger, chemical corrosive gas and well-ventilated place, the ground Angle is not more than 3.
Load switch technical parameters
Prefabricated substation technical parameter table
| Item | Name | Unit | Parameter |
| 1 | Rated voltage | KV | 10/0.4（HV／LV） |
| 2 | Max.operating voltage | KV | 12（HV side） |
| 3 | Rated frequency | HZ | 50 |
| 4 | Rated capacity | KVA | 50-1600 |
| 5 | 1min power frequency withstand voltage | KV | 35 |
| 6 | Lightning impulse voltage | KV | 75 |
| 7 | Cooling | Oil immersed self-cooling | |
| 8 | High voltage backup fuse breaking current | KA | 50 |
| 9 | Breaking current of plug-in fuse | KA | 2.5 |
| 10 | Ambient temperature | ℃ | -35-+40 |
| 11 | Coil allows temperature rise | K | 65 |
| 12 | No load voltage regulation | ±5％ or ±2×2.5％ | |
| 13 | Noise level | dB | 50 |
| 14 | Protection level | IP43 |
Transformer technical parameters table
Selection of S9 series transformer body, low loss, good overload capacity, strong short-circuit resistance, all fasteners are anti-loose treatment, no lifting core; S10 series and S11 series transformers with better performance are also available
| Capacity
KVA |
Voltage
KV |
Connection symbol | No-load current% | No-load current% | Impedance voltage% | S9 | S10 | S11 | |||||
| HV | LV | S9 | S10 | S11 | S9 | S10 | S11 | ||||||
| 50 | 10±5％or±2×2.5％ | 0.4 | DYN11 or YYN0 | ||||||||||
| 63 | |||||||||||||
| 80 | |||||||||||||
| 100 | |||||||||||||
| 125 | |||||||||||||
| 160 | |||||||||||||
| 200 | |||||||||||||
| 250 | |||||||||||||
| 315 | |||||||||||||
| 400 | |||||||||||||
| 500 | |||||||||||||
| 630 | |||||||||||||
| 800 | |||||||||||||
| 1000 | |||||||||||||
| 1250 | |||||||||||||
Load switch technical parameter table
Load switch is oil-immersed, three-phase linkage switch, spring operating mechanism; It can be operated with load opening and closing, and its closing speed has nothing to do with the operating force. There are two stations, four stations T type, four stations V type and so on.
Main technical parameters
| Item | Name | Unit | Four-station ring network load switch | Two-station load switch | |
| 1 | Rated current
Rated short-circuit closing current Rated short-time withstand current Rated short-time withstand time Mechanical life |
A | 630 | 31.5 | |
| 2 | KA | 31.5 | 31.5 | ||
| 3 | KA | 12.5 | 12.5 | ||
| 4 | S | 2 | 2 | ||
| 5 | 2000 | 2000 | |||
| 6 | Lightning impulse withstand | Phase -earth | KV | 75 | 75 |
| 7 | Voltage peak full wave | Isolation port | KV | 85 | 85 |
| 8 | 1min power frequency withstand voltage | Phase-Earth | KV | 42 | 42 |
| 9 | Isolation port | KV | 48 | 48 | |
| 10 | Rated peak withstand current | KA | 31.5 | 31.5 | |
Fuse technical parameters (the company’s oil-immersed fuse selection configuration recommendation table)
The full range of protection is provided by the backup protection fuse and the plug-in fuse in series on the high voltage side of the American box, the principle is simple, economical and reliable; The backup protection fuse is oil-immersed high voltage current limiting fuse, with large breaking capacity, and only operates when the transformer is faulty inside. The plug-in fuse is equipped with double sensitive fuse, which can provide double protection of current and temperature. After the double sensitive fuse is blown, the core can be easily replaced on site.
| Item | There-phase transformer capacity（KVA） | Transformer primary voltage(10KV) | |
| XRNT Rated current(A) | PRNT1 Overload protection rated current(A) | ||
| 1 | 30 | 10 | 6 |
| 2 | 50 | 16 | 8 |
| 3 | 80 | 16 | 10 |
| 4 | 100 | 20 | 15 |
| 5 | 125 | 25 | 15 |
| 6 | 160 | 31.5 | 25 |
| 7 | 200 | 40 | 25 |
| 8 | 250 | 50 | 40 |
| 9 | 315 | 63 | 40 |
| 10 | 400 | 63 | 40 |
| 11 | 500 | 80 | 50 |
| 12 | 630 | 100 | 50.65 |
| 13 | 800 | 125 | 65 |
| 14 | 1250 | 160 | 100 |
| 15 | 1600 | 200 | 140 |
– Box- type transformer structure
Box- type transformer structure
The box-type structure of the product is composed of three parts: high voltage interval, low voltage interval and oil tank interval. The high voltage interval includes high voltage cable accessories, load switches, off-circuit tap-changer, plug-in fuses, pressure relief valves, oil level gauges, oil temperature gauges, and oil relief valves. The low-voltage interval includes low-voltage bushing, low-voltage meter, circuit breaker, and a capacitor compensation. The tank interval includes transformer windings and iron cores, radiators, high-voltage load switches and fuses in the tank. According to the requirements of the scheme, the Box- type transformer can be designed into “品”style or “目”style as shown in the figure below.
Figure 1: Prefabricated substation structure diagram
1, High voltage insulation bushing 2, load switch 3, Tap changer 4, Transformer 5, High voltage chamber 6, low voltage chamber 7, radiator 8, oil relief valve 9, low voltage bushing 10, oil temperature meter 11, Pressure gauge 12, Pressure relief valve 13, oil level gauge 14, oil injection hole 15, insert fuse 16, hook
Substation cable inlet and outlet construction drawing (YB27)
Technical requirements:
For dimensions, see combination transformer actual dimension:
The surface of the concrete platform should be flat, and the combined substation is fixed on the platform by clamping plate.
The type of ground bar and cable fixing bracket can be determined according to the actual situation;
The cable fixing frame and ground bar should be pre- embedded.
The position of the inlet and outlet cable holes depends on the specific situation;
After the combination transformer is installed, the front side of the switch must have a gap of not less than 1.5m to facilitate operation;
Grounding net can be made of 12 galvanized round steel or 40×4 galvanized flat copper,
The grounding resistance must meet the requirements of the power department.
