PEHM Series Power Transformers Catalog Summary

Overview

The document provides detailed specifications for the PEHM series of power transformers, including catalog numbers, mechanical dimensions, pin configurations, and approximate weights. These transformers are compatible with UL B type standards.

Main Sections and Content

1. Catalog Numbers and Standard Output

Each transformer model is identified by a unique catalog number (e.g., PEHM66-60, PEHM76-50) and a corresponding standard output voltage (VA).

2. Mechanical Dimensions and Tolerances

The table lists multiple mechanical parameters with their maximum or tolerance values (in millimeters), including dimensions labeled A through N, pin spacing (PRI for primary, SEC for secondary), and other critical measurements such as pin size and spacing.

• Dimensions A to N: These represent the physical size constraints of each transformer model, with tolerances mostly ±1 mm, except for dimension N which has ±0.3 mm.
• Pin Spacing: Primary (PRI) and Secondary (SEC) pin intervals are specified, critical for mounting and electrical connections.
• Pin Size: Typical pin dimensions are 4.5×6.5 mm or 4.5×8.0 mm, with some models using 5.5×10 mm pins.

3. Pin Quantity

The number of pins for primary and secondary windings varies by model, generally ranging from 7 to 24 pins depending on the transformer size and configuration.

4. Weight

Approximate weight values are provided for each model, ranging from about 1.6 kg to 9.6 kg, with a tolerance of ±0.5 kg.

Key Parameters and Limitations

• Output Power (VA): Ranges from 75 VA to 650 VA across models.
• Mechanical Tolerances: Tight dimensional tolerances ensure compatibility with mounting and electrical standards.
• Pin Configuration: Variations in pin size and spacing accommodate different electrical connection requirements.
• Weight Considerations: Weight increases with transformer size and output capacity.

Recommendations and Compatibility

The PEHM series transformers are designed for power applications and are compatible with UL B type standards, indicating suitability for safety and regulatory compliance in relevant markets.

Summary Table Insights

The extensive tabular data provides a comprehensive reference for selecting the appropriate transformer model based on output power, physical size, pin configuration, and weight. This facilitates design integration and ensures mechanical and electrical compatibility.