A ___________________________ steps down transmission voltage to distribution voltage.

• substation transformer

• Pole top transformer

• voltage regulator

• Step up transformer

In a typical distribution system, electricity at ____________________ voltage is supplied to a customer.

• primary

• nominal

• peak

• secondary

Primary distribution voltage is:

• applied to a distribution system by a substation transformer

• the voltage of the electricity supplied to the customer

• applied to distribution lines in a service area

True or False A transformer improves the overall efficiency of a distribution system by increasing the amount of usable power that can be supplied to a customer.

• True

• False

During high voltage surges, _______________________ provides a way of redirecting excess current to the ground.

• surge destroyers

• surge arresters

• surge eliminators

• current protectors

Voltage applied to the primary winding of a distribution transformer is usually higher in value than the voltage induced in the secondary winding.

• True

• False

In a typical distribution transformer:

• primary voltage is applied to the secondary winding through connections at the transformer core

• primary distribution voltage applied to the secondary winding induces a secondary voltage which is supplied to the customer.

• primary voltage applied to the primary winding induces a voltage in the secondary winding

• primary distribution voltage is supplied to customers through the secondary bus.

Distribution transformers can be buried underground or mounted overhead on utility poles

• True

• False

A 15 KV rated lightning arrester is typically larger in size than a lightning arrester rated at 10 KV.

• True

• False

A way to determine if a power line is operating at 7.2 kv or 14.4 kv is to look at the size of insulators and lightning arresters.

• True

• False