Question

the transmission line feeding power on either side of the main transmission line is called

Answer 1

Hello Dear.

↔↔↔

⇆ The transmission line feeding power on either side of the main transmission is called " Secondary Transmission" Line.

See in the attachment ↓

Reason / Explanation → In secondary transmission Primary voltage are reduced to very Low order of Value ( Like- 3.3 kv ) 

While in Primary Transmission high voltage of order 220 Kv and 400 Kv are used in power transmission usually in three phase three wire circuit system. 

⇒ Uses of Secondary Distribution / Transmission → It consist a low Network system , so it's used along the street localities & over the rural area. it is three phase four wire circuit system. 

↔↔↔

Hope it Helps.

Have a Marvelous Day.

Answer 2

The answer is secondary transmission.  

The transmission line feeding power on either side of the main transmission line is called secondary transmission. For such posts, the primary voltage value is lessened to very low values. Some of the common voltage values for secondary transmission are 3.3 kV, 11 kV and 33 kV.