LEDs and connection

WARNING

Do not operate current transformers in no-load mode!

Please note that many manufacturers do not permit their current transformers to be operated in no-load mode! Connect the EL3783 to the secondary windings of the current transformers before using the current transformer!

WARNING

Earthing of the terminal point N when measuring current!

If you do not connect the terminal point N with the neutral conductor of your mains supply (e.g. if the EL3783 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!

LEDs and connection 1:
EL3783 (Component values only exemplary, exact value s. Technical data)

Left side

Right side

Terminal point

Description

Terminal point

Description

Name

No.

Name

No.

IL1

1

Phase L1 current measurement input

L1

1'

Phase L1 voltage measurement input

IL2

2

Phase L2 current measurement input

 

2'

n.c.

IL3

3

Phase L3 current measurement input

L3

3'

Phase L3 voltage measurement input

 

4

n.c.

N

4'

Neutral conductor

IL1'

5

Phase L1 current measurement output

 

5'

n.c.

IL2'

6

Phase L2 current measurement output

L2

6'

Phase L2 voltage measurement input

IL3'

7

Phase L3 current measurement output

 

7'

n.c.

N

8

Neutral conductor

N

8'

Neutral conductor

LEDs

LEDs and connection 2:
EL3783 LEDs

LED

Color

Meaning

RUN

green

This LED indicates the terminal's operating state:

off

State of the EtherCAT State Machine: INIT = initialization of the terminal or BOOTSTRAP = function for firmware updates of the terminal

flashing

State of the EtherCAT State Machine: PREOP = function for mailbox communication and different standard-settings set

Single flash

State of the EtherCAT State Machine: SAFEOP = verification of the Sync Manager channels and the distributed clocks.
Outputs remain in safe state

on

State of the EtherCAT State Machine: OP = normal operating state; mailbox and process data communication is possible

IL1 OK

green

on

Current IL1 ok

IL1 Error

red

on

Overcurrent on L1.
Current > 1.8 A (with 1 A measuring range), equivalent to 1.3 Arms
Current > 9.2 A (with 5 A measuring range), equivalent to 6.5 Arms

IL2 OK

green

on

Current IL2 ok

IL2 Error

red

on

Overcurrent on L2.
Current > 1.8 A (with 1 A measuring range), equivalent to 1.3 Arms
Current > 9.2 A (with 5 A measuring range), equivalent to 6.5 Arms

IL3 OK

green

on

Current IL3 ok

IL3 Error

red

on

Overcurrent on L3.
Current > 1.8 A (with 1 A measuring range), equivalent to 1.3 Arms
Current > 9.2 A (with 5 A measuring range), equivalent to 6.5 Arms

L1 OK

green

on

Voltage on L1 OK

L1 Error

red

on

Overvoltage on L1. Voltage > 737 V (L1-N)

L2 OK

green

on

Voltage on L2 OK

L2 error

red

on

Overvoltage on L2. Voltage > 737 V (L2-N)

L3 OK

green

on

Voltage on L3 OK

L3 error

red

on

Overvoltage on L3. Voltage > 737 V (L3-N)

Error

red

on

Other errors (logical OR conjuction)

Wiring and measurement methods

Examples of wiring for measurements in the three-phase grid

LEDs and connection 3:
Measurement in a 3-phase, 4-conductor grid, asymmetrical load
LEDs and connection 4:
Measurement in a 3-phase, 4-conductor grid with 3 voltage transformers, asymmetrical load
LEDs and connection 5:
Measurement in a 3-phase, 3-conductor grid, asymmetrical load

CAUTION

Risk of device damage!

The user must ensure proper fusing of the voltage measurement path in accordance with the measured variable as well as adequate transient protection!