What Are the Key Transformer Specifications to Know?

This rating supports smaller feeders. The oil volume remains modest. The impedance stays near two percent. The voltage design supports short-range loads. Efficiency follows ANSI rules. Transformers specifications for this size remain stable across many regions. The compact core reduces stray losses. The winding arrangement handles domestic and light loads. Engineers use these units for predictable cycles. Oil volume supports controlled temperature under peak load.

50 kVA single phase pad mounted transformer specification

Pad-mounted enclosures add weight, with the cooling method following ONAN. An increase in oil volume ensures protection for the sealed case. Designed for public locations, the enclosure provides greater physical security and protection from weather. Impedance levels are adjusted to support balanced networks. This unit integrates easily with underground cables and is ideal for campuses and mixed-use environments. Specifications for transformers are adjusted to accommodate the larger enclosure requirements.

100 kVA Transformers

100 kVA transformer specification

This rating supports small commercial loads. The oil capacity rises with the larger core. Balanced voltages support three-phase services. The winding insulation follows national rules. The thermal response remains steady with this oil margin. Transformers specifications for this rating help maintain reliability in environments with predictable cycles. The voltage range supports multi-building services.

100 kVA single phase pad mounted transformer specification

Oil volume climbs due to sealed construction. Pad enclosures improve access control. Efficiency follows DOE rules. The core handles modest inrush. The impedance keeps fault current within safe limits. Weight increases with thicker steel. This arrangement suits underground cable feeders. Transformers specifications vary with grounding patterns and cable lengths.

150 kVA Transformers

150 kVA pad mounted transformer specification

This rating is designed for larger commercial sites, where a higher BIL accommodates longer feeders. The oil system effectively manages thermal cycles, ensuring consistent performance. A grounded network is ideal for commercial blocks, and the distribution pattern is optimized for balanced loads. The pad system offers protection for both workers and the public. At this size, transformer specifications must comply with stricter national standards.

200 kVA Transformers

This rating adds tap flexibility. Oil capacity rises sharply. The weight suits the heavy core. Impedance rises to limit faults. Networks with varied loads rely on these ratings. Tap ranges support seasonal shifts. Transformers specifications here emphasize reliability.

250 kVA Transformers

250 kVA single phase pad mounted transformer specification

These units operate in mixed climates. Cooling may include KNAN. A wide temperature range supports outdoor sites. The BIL matches higher surge risks. Impedance remains low. Transformers specifications shift to match environmental extremes.

This rating supports larger mixed-use districts. Oil volume remains moderate. Impedance holds at efficient levels. The core scales cleanly. Power networks often select this rating for service blocks where loads remain stable. Transformers specifications create predictable voltage stability.

Mid-Range Power Transformers

500 kVA Transformer Specifications

500 kVA power transformer specification

These ratings support moderate industrial sites. Vector groups define phase behavior. Oil volume rises for longer cycles. Standards ensure thermal protection. Impedance manages harsh fault conditions. Transformers specifications concentrate on safe service continuity.

630 kVA Transformer Specifications

750 kVA Transformer Specifications

750 kVA skid-mounted transformer specification

These transformers supply industrial groups. Skid frames offer mobility. Oil systems allow extended duty. Impedance rises with larger cores. Thermal rise aligns with standards. Transformers specifications guide industrial power reliability.

1000 kVA Transformers

This rating supports large structures. Heavy cores ensure stable voltage. BIL supports longer feeders. Cooling varies for duty cycles. Transformers specifications reflect heavy industrial needs.

1250 kVA Transformer Specification

This rating fits small substations. High efficiency keeps losses low. The design supports long duty cycles. This unit forms the upper edge of mid-range distribution. Transformers specifications here focus on strict thermal limits.

List of Common Considerations for Mid-Range Ratings

• Impedance level for stable protection

• Insulation class for surge safety

• Oil volume for controlled temperature

• Cooling mode for extended cycles

Selecting these factors shapes long-term reliability. Transformers specifications at mid-range levels ensure controlled operation with diverse load groups. Networks with mixed building types rely on stable thermal behavior. Oil systems and insulation classes form a key part of these designs. Load growth influences tap settings. Operators track each parameter for secure distribution networks.

FAQ

Why do different transformer sizes need different impedance values?

Impedance shapes fault current performance. Each transformer size carries a unique core geometry and winding layout. These elements influence magnetic behavior during short circuits. A lower impedance increases fault current. A higher impedance reduces fault impact but raises voltage drop. Each rating must balance these factors for safe operation. Rural feeders often use lower values because fault levels remain modest. Dense networks with strong upstream sources require higher impedance to limit damage. Engineers track these values against system protection curves. Transformers specifications embed these limits so the device operates safely under severe conditions.