Isolation Transformer

A transformer that electrically separates the
drive from the AC power line. An isolation
transformer provides the following advantages:
1. In DC motor applications, it guards against
inadvertent grounding of plant power lines
through grounds in the DC motor armature
circuit.
2. Enhances protection of semiconductors from
line voltage transients.
3. Reduces disturbances from other solid state
control equipment such as drives without
isolation transformers, time clock systems,
electronic counters, etc.