1 MVA Hermetically Sealed Substation - 12470V Delta Primary, 480Y/277 Secondary - ONAN

Product Overview

1 MVA Hermetically Sealed Substation - 12470V Delta Primary, 480Y/277 Secondary - ONAN is a product intended for professional commercial and industrial applications.

Key Specifications

• Transformer Features: The industrial transformer features a primary voltage of three-phase 12470V Delta and a secondary voltage of three-phase 480Y/277. This system is rated for 1 MVA (1,000 KVA). This transformer features a 5-position tap changer with two, +/- 2.5% taps above and two, +/- 2.5% taps below to allow small changes for voltage.
• Temperature Rise: This unit features 50°C temperature rise for reduced heat waste, increased reliability and longer life. The transformer meets standard ANSI/IEEE efficiency requirements. The combination of low temperature rise and high efficiency makes this unit suitable for use in electrical rooms, air conditioned spaces in buildings, underground vaults and similar locations, in addition to outdoor areas.
• Insulation Fluid: The MT-PSTH-R7-3P-DMR-1MVA-YE-HNS-LNS-A6-CM-AZ-1Z2-M1 features biodegradable fluid (ONAN). We offer transformers with mineral oil or FR-3 fluid, if needed.
• Biodegradable Fluid: Biodegradable cooling fluid (vegetable oil) has a higher heat capacity compared to mineral oil, making the liquid safer to use and more reliable during operations. Vegetable oil has a higher flash point and fire point than mineral oil, hydrocarbon oil, silicone oil and synthetic ester. This cooling fluid is also non-toxic and can tolerate higher breakdown voltages than mineral oil. When operating at high temperatures, biodegradable cooling liquid sustains up to 120% loan conditions, which helps preserve the transformer's lifespan and performance.
• Gauges: The following gauges are included with the system: liquid level, temperature and pressure/vacuum gauges. Standard liquid level, temperature and pressure/vacuum gauges are analog, manual reading types.
• Fault Pressure Devices: There are no fault pressure devices on the unit. Fault pressure devices are used to detect high rates of pressure rise within the tank.
• Rapid Rise Relay: There are no rapid rise relays on the unit. This safety component is designed for protection when a rapid increase in tank pressure occurs. The relay is suitable for detecting sudden pressure fluctuations above predetermined safe limits.
• Surge arresters: This system does not come with surge arresters on the primary side. Designed for over-voltage and transient voltage protection, the components prevent damage caused by lightning, internal switching or voltage surges. We can offer models without high elbow surge arresters that have mounting provisions for customer-provided surge arresters.
• Load Breaker Switch: The transformer does not have a load breaker switch.
• Valves: The MT-PSTH-R7-3P-DMR-1MVA-YE-HNS-LNS-A6-CM-AZ-1Z2-M1 is equipped with a pressure relief valve, fill valve and drain valve with sampler port.

This item is grouped with Medium Voltage Pad Mount Transformers.

Before ordering: Verify ratings, dimensions, compatibility, and installation requirements before ordering.