Product Introduction
SCOTECH delivered two units of 315 KVA vacuum pressure impregnated (VPI) dry type transformer to South Africa in 2018. The rated power of the transformer is 315 KVA. the primary voltage of the transformer is 3.3 KV and secondary voltage is 0.4 KV, the transformer coils are vacuum pressure impregnated in high temperature polyester vanish under vacuum and pressure, the coils can be made of copper or aluminum, the insulation is made of high grade nonflammable materials, the insulations class can be F(155℃), H(180℃）or C(220℃) class, suitable for different requirements, the finished coils are effectively protected against moisture, dirt, and most industrial contaminants, VPI transformers are suitable for use indoors or outdoors, any place require particular attention to the environments, such as costal and mining area, it can equipped with cooling fans and temperature controller to allow it have overload capacity. It’s maintenance free to save your valuable time and compact in size to save your limited space.
We ensure that each one of our delivered units has undergone rigorous full acceptance testing. We provide one-package service from consulting, quoting, manufacturing, installation, commissioning, training to after sale services, our products are now operating in more than 50 counties in the world. We aim to be your most reliable supplier as well as your best partner in business!
Advantages
Fire resistant /Self-extinguishing(F1)
Environmental class(E2) and climatic class (C2)
From IP00-IP56 enclosure with AN, AF, ANAF or AFWF cooling
Maintenance free
Environmental friendly ,＞90% of material recyclable
Temperature control system
Built-in PT100 probes in 3 phase windings to detect the real-time temperature of windings and cycle display them in the digital screen.
Open circuit alarm and fault self-check alarm display and signal output.
3 stages automatically actions while the temperature reached to the set value, 1st stage the cooling fans start automatically, 2nd stage high temperature alarm,3rd stage over temperature trip.
Fans manual/auto control switch, timing start/stop, history data output.
4-20mA current output
RS485 Modbus communication protocol
Environment temperature measurement
Core temperature measurement
Scope of Supply
Product: resin cast dry type transformer
Voltage level: up to 35KV
Rating level: up to 20MVA
The transformer can be designed according to customer’s requirements
Technical Data Sheet
315 KVA Dry Type Transformer specifications and data sheet
| Delivered to | Rwanda |
| Year | 2016 |
| Model | SG10 -315 KVA-3.3/0.4KV |
| Type | resin cast dry type transformer |
| Standard | IEC60076 |
| Rated Power | 315 KVA |
| Frequency | 50 HZ |
| Phase | Three |
| Cooling Type | AN/AF |
| Primary Voltage | 3.3 KV |
| Secondary Voltage | 0.4 KV |
| Winding Material | Aluminum |
| Vector Group | Dyn11 |
| Impedance | 4% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | 0.88 KW |
| On Load Loss | 3.47 KW |
| Accessories | Standard Configuration |
General arrangement drawing
Name plate
Finished 315 KVA 3.3/0.4KV Transformer
Transformer ready for ship
Why Insulation resistance of dry type transformer decreased：
1.Reason analysis. Pouring type dry transformer winding is mostly made of resin pouring, conductor material is sealed in it, so the decrease of insulation resistance is mostly caused by moisture condensation on the surface of winding, dust accumulation or part of insulation material being affected by moisture.
2.Processing method： Clean winding surface, surface moisture condensation with dry cloth wipe, natural air can be restored. It can be dried by heater and ventilated by fan. The neutral line (zero row) of the three-phase connection of dry-type transformer can be disconnected. The megohm meter is used to determine which phase the problem is in, and then the problem is carefully searched and processed.
FAQ
1. How soon can you delivery the transformer?
It depends on the quantity and capacity of the transformer, normally within one month since the date drawing confirmed by buyer.
2. How long can you provide the quality warranty?
12 months since the date transformer operated.
3. What payment method do you accept?
T/T (wire transfer), L/C both accepted.
