{"id":2503,"date":"2026-01-25T09:19:07","date_gmt":"2026-01-25T09:19:07","guid":{"rendered":"https:\/\/powernextransformer.com\/?post_type=product&p=2503"},"modified":"2026-01-25T09:40:11","modified_gmt":"2026-01-25T09:40:11","slug":"1250-kva-three-phase-oil-filled-distribution-transformer-medium-voltage-13-8-kv-13-2-kv-12-47-kv-primary-to-480y-277-v-or-208y-120-v-secondary","status":"publish","type":"product","link":"https:\/\/powernextransformer.com\/zh\/manufacturer\/1250-kva-three-phase-oil-filled-distribution-transformer-medium-voltage-13-8-kv-13-2-kv-12-47-kv-primary-to-480y-277-v-or-208y-120-v-secondary\/","title":{"rendered":"1250 KVA Three Phase Oil Filled Distribution Transformer, Medium Voltage 13.8 kV \/ 13.2 kV \/ 12.47 kV Primary to 480Y\/277 V or 208Y\/120 V Secondary"},"content":{"rendered":"

1. Product Overview and Market Positioning<\/h3>\n

The 1250 kVA three phase oil filled distribution transformer<\/a> is a high-capacity medium voltage power distribution solution engineered to meet the demanding requirements of modern utility grids, industrial power systems, and large commercial electrical infrastructures. Designed for medium voltage primary levels of 13.8 kV, 13.2 kV, and 12.47 kV, and commonly configured with 480Y\/277 V or 208Y\/120 V secondary outputs, this transformer plays a critical role in stepping down power safely and efficiently for downstream electrical loads.<\/p>\n

As a three phase oil filled distribution transformer, the 1250 kVA unit represents a balance between robust electrical performance, thermal stability, and long-term operational reliability. Oil-immersed insulation technology has been widely proven across global power networks for decades, particularly in applications where continuous duty, outdoor installation, and high load density are required. Compared with dry-type transformers, the oil filled distribution transformer offers superior cooling efficiency, higher overload tolerance, and extended service life.<\/p>\n

The 1250 kVA rating positions this transformer squarely within medium-to-large capacity distribution classes, making it ideal for substations, industrial plants, manufacturing campuses, data centers, logistics hubs, mining facilities, and infrastructure projects where power demand is significant and reliability is non-negotiable. Its compatibility with widely adopted medium voltage standards such as 13.8 kV, 13.2 kV, and 12.47 kV ensures seamless integration into existing utility and industrial power systems across multiple regions worldwide.<\/p>\n

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2. Technical Parameters and Specifications<\/h3>\n

The following technical parameters define the standard configuration of the 1250 kVA three phase oil filled distribution transformer<\/strong>. All values can be adjusted or customized based on specific project requirements, grid standards, or utility specifications.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nSpecification<\/th>\n<\/tr>\n
Rated Capacity<\/td>\n1250 kVA (custom range: 25 \u2013 5000 kVA)<\/td>\n<\/tr>\n
Transformer Type<\/td>\nThree Phase Oil Filled Distribution Transformer<\/td>\n<\/tr>\n
Phase<\/td>\nThree-phase<\/td>\n<\/tr>\n
Frequency<\/td>\n50 Hz \/ 60 Hz<\/td>\n<\/tr>\n
High Voltage (HV)<\/td>\n12.47 kV \/ 13.2 kV \/ 13.8 kV (optional: 4.16 kV \/ 6.6 kV \/ 10 kV \/ 11 kV \/ 15 kV \/ 22 kV \/ 33 kV)<\/td>\n<\/tr>\n
Low Voltage (LV)<\/td>\n480Y\/277 V \/ 208Y\/120 V (optional: 400 V \/ 415 V \/ 380 V \/ 240 V)<\/td>\n<\/tr>\n
Voltage Regulation<\/td>\n\u00b12 \u00d7 2.5% or \u00b15%<\/td>\n<\/tr>\n
Vector Group<\/td>\nDyn11 \/ Yyn0 \/ Yd11 \/ Customized<\/td>\n<\/tr>\n
Impedance<\/td>\n5% \u2013 8% (customizable)<\/td>\n<\/tr>\n
Cooling Method<\/td>\nONAN \/ ONAF<\/td>\n<\/tr>\n
Insulation Class<\/td>\nClass A<\/td>\n<\/tr>\n
Temperature Rise<\/td>\n55K \/ 65K<\/td>\n<\/tr>\n
Ambient Temperature<\/td>\n\u201325\u00b0C to +45\u00b0C<\/td>\n<\/tr>\n
Installation<\/td>\nOutdoor \/ Indoor<\/td>\n<\/tr>\n
Standards<\/td>\nANSI \/ IEC \/ IEEE<\/td>\n<\/tr>\n
Certifications<\/td>\nCE \/ UL \/ CSA \/ ISO (available)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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