Section 1—Introduction

This instruction bulletin provides installation, operation and maintenance instructions for dry-type transformers 1000 volts and below for use in commercial and industrial applications.

The following dry-type transformer product families are included in this instruction bulletin. Typical transformers are shown in Energy Efficient 2016
Transformers (EX), Energy Efficient 2016
Transformers (EX), Open Core and Coil, Energy Efficient (EE) Ventilated Transformer, Non-Linear (NL, NP, NLP) and
Harmonic Mitigating (HM) , and Non-ventilated
Transformer.

• Low Voltage Distribution Transformers, Three-phase and Single-phase

  • General Purpose—50 and 60 Hz

  • Energy Efficient (EE)—60 Hz

  • Energy Efficient 2016 (EX)—60 Hz

  • Non-linear Offering (NL, NP or NLP)—50 and 60 Hz

  • Harmonic Mitigating Transformers (HM)—50 and 60 Hz

  • Open Core and Coil (OC)

• Drive Isolation Transformers (DIT)

• Non-ventilated Transformers (NV)