|
Pad Mounted Transformer Technical Specification |
|
RatedPower(KVA) |
H.V(KV) |
L.V（V） |
Loss(W) |
Dimension（CM） |
Weight(KG) |
|
No-loadLoss (W) |
On-loadLoss (W) |
W |
D |
H |
Oil Weight |
Total Weight |
|
75KVA |
34.5KV
19.92KV
13.8KV
13.2KV
7.62KV
12.47KV
7.2KV |
240V480V4
80Y/277V
600Y/347V |
180 |
1250 |
1390 |
910 |
1430 |
120 |
645 |
|
112.5KVA |
200 |
1500 |
1420 |
920 |
1430 |
138 |
729 |
|
150KVA |
280 |
2200 |
1510 |
980 |
1530 |
201 |
989 |
|
225KVA |
400 |
3050 |
1600 |
1000 |
1660 |
230 |
1195 |
|
300KVA |
480 |
3650 |
1660 |
1080 |
1680 |
260 |
1415 |
|
500KVA |
680 |
5100 |
1810 |
1160 |
1790 |
325 |
1905 |
|
750KVA |
980 |
7500 |
2030 |
1300 |
2030 |
535 |
2755 |
|
1000KVA |
1150 |
10300 |
1651 |
1549 |
1854 |
650 |
3235 |
|
1500KVA |
1640 |
14500 |
2210 |
1470 |
2150 |
748 |
5835 |
|
2000KVA |
2160 |
20645 |
2380 |
1600 |
2220 |
950 |
6430 |
|
2500KVA |
2680 |
27786 |
2480 |
1650 |
2330 |
1020 |
8865 |
STANDARD COMPONENTS
Connections and neutral configurations
• Delta - Wye: Low voltage neutral shall be a fully insulated X0 bushing with removable ground strap.
• Grounded Wye-Wye: High voltage neutral shall be internally tied to the low voltage neutral and brought out as the H0X0 bushing in the secondary compartment with a removable ground strap.
• Delta-Delta: Transformer shall be provided without a neutral bushing.
• Wye-Wye: High voltage neutral shall be brought out as the H0 bushing in the primary compartment and the low voltage neutral shall be brought as the X0- bushing in the secondary compartment.
• Wye-Delta: High voltage neutral shall be brought out as the H0 bushing in the primary compartment. No ground strap shall be provided (line to line rated fusing is required).
High and low voltage bushings
• 200 A bushing wells (15, 25, and 35 kV)
• 200 A, 35 kV Large Interface
• 600 A (15, 25, and 35 kV) Integral bushings (dead-front)
Electrical-grade wet-process porcelain bushings(live-front)
Tank/cabinet features
• Bolted cover for tank access (45-2500 kVA)
• Welded cover with hand hole (>2500 kVA)
• Three-point latching door for security
• Removable sill for easy installation
• Lifting lugs (4)
• Stainless steel cabinet hinges and mounting studs
• Steel divider between HV and LV compartment
• 20" Deep cabinet (45-1000 kVA)
• 24" Deep cabinet (1500-7500 kVA)
• 30" Deep cabinet (34.5/19.92 kV)
• Pentahead captive bolt
• Stainless steel 1-hole ground pads (45-500 kVA)
• Stainless steel 2-hole ground pads (750-10,000 kVA)
• Parking Stands (dead-front)
Valves/plugs
• One-inch upper filling plug
• One-inch drain plug (45-500 kVA)
• One-inch combination drain valve with sampling device in low voltage compartment (750-10,000 kVA)
• Automatic pressure relief valve
Nameplate
• Laser-scribed anodized aluminum nameplate
V.500 kva Three Phase Pad mounted Transformer Case show
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VI.500 kva Three Phase Pad mounted Transformer FAQ
Q1. What are the typical application scenarios of 500kVA transformer?
*Power distribution for medium-sized factories and logistics parks;
*Backup power supply for commercial complexes, hospitals, or data centers;
*Centralized power supply for communities along urban main roads;
*Grid connection of photovoltaic power plants or energy storage systems.
Q2. What are the common configurations for its rated input/output voltage?
*High voltage side: 15kV or 25kV (North American standard);
*Low voltage side: 480V (three-phase four wire system, line voltage 480V/phase voltage 277V);
*Special scenarios can be customized (such as 208V/120V).
Q3. How to calculate the rated current on the high and low voltage sides?
*High voltage side: I=500kva/13.2kV/√3=21.8A
*Low voltage side: I=500kva/0.4kV/√3=721.7A
Q4. What are the requirements for the foundation and environment during installation?
*Basic load-bearing capacity: ≥ total weight of the box (including approximately 2000kg of oil);
*Ventilation and heat dissipation: Reserve a space of ≥ 1 meter around the box to avoid direct sunlight or obstruction;
*Grounding resistance: ≤ 4 Ω, multiple grounding points are recommended;
*Protective measures: Anti collision fences and warning signs should be installed outdoors.
Can the Q5.500kVA transformer be directly connected to the photovoltaic system?
*Feasible solution: It needs to be connected through the low-voltage side and equipped with anti backflow devices (to prevent electricity from being sent back to the high-voltage side);
*Attention: It is necessary to confirm the compatibility of the transformer and adjust the protection logic with the manufacturer.
Q6. What are the key points to pay attention to in daily maintenance?
*Oil level and temperature: Check the oil level of the oil pillow every month, and the normal oil temperature should be ≤ 55 ℃;
*Sealing: Check whether the box door gap and sleeve sealing ring are aging and leaking oil;
*Insulation oil testing: Test breakdown voltage (≥ 30kV) and acid value (≤ 0.1mg KOH/g) every 2 years;
*High voltage connector: Clean the T-shaped cable head annually and apply insulating silicone grease.
Q7. How to choose the protection level (NEMA standard)?
*Conventional outdoor: NEMA 3R (rain and snow protection, ventilation and heat dissipation);
*Industrial environment: NEMA 4 (anti spray, dust) or NEMA 4X (corrosion-resistant);
*Comparing IP ratings: NEMA 3R≈IP24，NEMA 4≈IP66。
Q8. How is its energy efficiency and losses?
*Energy Efficiency Standard: Refer to NEMA TP-1, with Level 1 energy efficiency being the best;
*No load loss: approximately 680-800W;
*Load loss: approximately 5500-6000W (under 75 ℃ conditions);
*Economy: High energy efficiency models have high initial costs, but can save electricity costs in the long run.
Q9. Common faults and emergency response measures?
*Low voltage no output: Check if the fuse is blown or if the circuit breaker trips;
*Box oil leakage: Stop immediately, tighten bolts or replace gaskets;
*Abnormal noise: Check for loose iron core (need to return to the factory for maintenance);
*High voltage connector overheating: Replace the oxidized or carbonized T-shaped cable head.
Q10. What parameters should be considered when purchasing a 500kVA transformer?
*Certification requirements: UL certification (essential for the North American market), ANSI/IEEE C57 standard;
*Delivery cycle: Standard models take about 3-5 weeks, customization may require an extension.
