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2.5MVA 24940V to 480Y/277V Conservator Type Oil Transformer ANSI IEEE Certified
Product Overview
Leilang Electric proudly presents the 2.5MVA (2500KVA) Conservator Type Oil-Immersed Substation Transformer (24940V to 480Y/277V), engineered and manufactured in strict compliance with ANSI/IEEE, DOE, CSA and ASTM international standards for North American power distribution systems. This pad-mounted radial feed transformer features KNAN/KNAF dual cooling technology and high-purity copper windings, delivering exceptional overload capacity, long-term reliability and energy efficiency for industrial parks, commercial centers, data centers and utility grid applications.
Our 2.5MVA conservator type transformer adopts an advanced oil expansion system that effectively isolates insulating oil from air, preventing moisture ingress and oil oxidation, significantly extending service life. Equipped with a grain-oriented silicon steel core and 5-position off-load tap changer, it maintains stable voltage output even under fluctuating load conditions. The transformer is designed to operate reliably in extreme temperatures ranging from -40°C to +40°C, making it suitable for harsh environmental conditions across North America.
Every unit undergoes 9+ rigorous factory tests before shipment to guarantee compliance with all stated performance parameters. With a production capacity of 500 units per month and a standard lead time of 30 days, Leilang Electric can fulfill both small and large-scale orders efficiently. All our transformers come with a 24-month comprehensive warranty from the bill of lading date, backed by lifetime technical support and free replacement of easily damaged accessories.
Core Product Features
Global Standard Compliance: Fully certified to ANSI/IEEE, DOE, CSA and ASTM standards, UL/cUL certification available upon request
Conservator Type Design: Advanced oil expansion system prevents moisture ingress and extends insulating oil service life
KNAN/KNAF Dual Cooling: Natural air cooling with optional forced air cooling for enhanced overload capacity
Comprehensive Protection: Equipped with Buchholz relay, automatic pressure relief valve and gas sampler
Extreme Temperature Operation: Designed for reliable performance from -40°C to +40°C with low noise (65 dBA)
Technical Specifications
2.5MVA Core Parameters (24940V to 480Y/277V)
Parameter
Specification
Rated Capacity
2500 KVA (2.5 MVA) / 3100 KVA (3.1 MVA)
Phase
3
Feed Type
Radial Feed
Primary Voltage
24940V (25kV class)
Secondary Voltage
480Y/277V
Vector Group
DYN1
Cooling Method
KNAN / KNAF
Frequency
60 Hz
Temperature Rise
55°C
Insulation Class
E (120°C rated)
Winding Material
Copper
Tap Changer
5-position off-load, 2.5% steps
Ambient Temperature Range
-40°C to +40°C
Sound Level
65 dBA
Primary BIL
110 kV
Secondary BIL
30 kV
PRODUCT SPECIFICATION
Rated Capacity
High Voltage
Low Voltage
Connection Symbol
Short Circuit Impendence
No-load loss
On-load loss
Dimension
Weight
(kVA)
(KV)
(V)
(%)
(W)
(W)
W*H*D(mm)
(kg)
800
4.16KV
12.47KV
13.2KV
13.8KV
24.94KV
34.5KV
or others
208/120V
480/277V
600V
12470V
13200V
13800V
or others
Dyn1
Ynyn0
Dyn11
Dd0
Ynd11
or others
2.7
3.1
4.35
5.75
6
980
9350
1060*1500*1780
2050
1000
1160
11500
1085*1570*1800
2450
1250
1380
13900
1160*1610*1890
2900
1600
1660
16600
1190*1630*1950
3400
2000
2030
18300
1260*1700*2090
4100
2500
2450
19600
1150*2150*2250
4750
3000
3240
26500
1900*2600*2150
6500
5000
4500
27000
2500*2210*3180
9500
7500
7200
32000
3660*3100*5100
13600
10000
8500
35500
3830*2640*2216
15800
Frequently Asked Questions (FAQ)
Q1: What international standards does Leilang Electric's 2.5MVA conservator type transformer comply with?
A: Our 2.5MVA 24940V to 480Y/277V substation transformer is designed, built and tested in full compliance with ANSI/IEEE, DOE, CSA and ASTM standards for North American markets. UL/cUL certification is also available upon request to meet specific regional requirements.
Q2: What are the advantages of the conservator type design compared to hermetically sealed transformers?
A: The conservator type design features an oil expansion tank that accommodates volume changes due to temperature fluctuations, preventing oil leakage and reducing internal pressure. It also allows for easier oil sampling and maintenance while still protecting the insulating oil from air and moisture contamination.
Q3: What cooling methods does this 2.5MVA transformer use, and what is its overload capacity?
A: It uses KNAN (K-class Oil Natural Air Natural) cooling as standard, with optional KNAF (K-class Oil Natural Air Forced) cooling with automatic fan controls. The KNAF mode increases the transformer's capacity from 2.5MVA to 3.1MVA, providing excellent overload capability for peak demand periods.
Q4: What winding material is used in this transformer, and why is it important?
A: Our standard 2.5MVA conservator type transformer uses high-purity copper windings, which offer superior electrical conductivity, lower resistance losses and better thermal performance compared to aluminum windings. Copper windings also provide enhanced durability and reliability for heavy-duty industrial applications.
Q5: Can this transformer operate in extreme temperature conditions?
A: Yes. This transformer is specifically designed to operate reliably in a wide ambient temperature range from -40°C to +40°C (-50°F to +104°F), making it suitable for installation in both cold northern regions and hot southern climates across North America.
Q6: What safety and protection features are included in this transformer?
A: It comes standard with a comprehensive suite of protection features including Buchholz relay for internal fault detection, automatic pressure relief valve, oil level and temperature gauges, gas sampler and tamper-proof pad-lockable doors. It also includes seismic-rated construction and NEMA 3R weatherproof enclosures.