Connection assignment

WARNING

Caution: Risk of electric shock!

If you do not connect the terminal point N with the neutral conductor of your mains supply (e.g. if the EL3773 is used purely for current measurements), terminal point N should be earthed, in order to avoid dangerous overvoltages in the event of a current transformer fault!

WARNING

Caution: Risk of electric shock!

Please note that many manufacturers do not permit their current transformers to be operated in no-load mode! Connect the EL3773 to the secondary windings of the current transformers before using the current transformer!

Connection assignment 1:Fig.4: EL3773

Connection

Terminal point

Description

Comment

Name

No.

L1

1

Phase L1

Connections for the voltage measurement. Please observe the notes.

L2

2

Phase L2

L3

3

Phase L3

N

4

Neutral conductor N
(internally connected to terminal point IN,
capacitively connected to the earthing contact to the mounting rail)

IL1

5

Consumer at phase L1

Connections for the current transformers. Please observe the notes.

IL2

6

Consumer at phase L2

IL3

7

Consumer at phase L3

IN

8

Star point of the current transformers
(internally connected to terminal point N,
capacitively connected to the earthing contact to the mounting rail)

Connection assignment 2:Fig.27: Block diagram