-- Supply network analyzer CVM-144 (HAR) ----- User's manual --- Page No. 11
4.3.3.- Module for residual and neutral currents (770 572, 770 575 and 770578)
Description
Lable in the expansion module connection terminal
Mod CVM 144 -C2-Currents
(Code: 7 70 572)
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250 V
3 A
RL1
RL2
I
N
Mod CVM 144 RS485-C2-Currents
(Code: 7 70 575)
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250 V
3 A
R
S 485
(+)
(-)
G
N
D
RL1
RL2
I
N
Mod CVM 144 RS232-C2-Currents
(Code: 7 70 578)
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250 V
3 A
RL1
RL2
I
N
Mod CVM 144
C2-Currents
(Code: 7 70 572)
Mod CVM 144
RS485-C2-Currents
(Code: 7 70 575)
Mod CVM 144
RS232-C2-Currents
(Code: 7 70 578)
Nº Terminal description
Nº Terminal description
Nº Terminal description
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Measur. residual current S1
Measur. residual current S2
(30 A)
Measur. residual current S2
(3 A)
Measur. neutral current S1
Measur. neutral current S2
Not used
Not used
Not used
Relay RL2 output
Relay RL2 common
Relay RL1 output
Relay RL1 common
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Measur. residual current S1
Measur. residual current S2
(30 A)
Measur. residual current S2
(3 A)
Measur. neutral current S1
Measur. neutral current S2
RS-485 ( GND )
RS-485 ( - )
RS-485 ( + )
Relay RL2 output
Relay RL2 common
Relay RL1 output
Relay RL1 common
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Measur. residual current S1
Measur. residual current S2
(30 A)
Measur. residual current S2
(3 A)
Measur. neutral current S1
Measur. neutral current S2
RS-232 ( GND )
RS-232 ( Rx )
RS-232 ( Tx )
Relay RL2 output
Relay RL2 common
Relay RL1 output
Relay RL1 common
Notes:
•
For the measurement of the residual current (earth leakage current), the use of
transformers of the WG xx series is required. These transformers can be connected
to the 3 A or 30 A rated input, depending on the needed measuring range.
•
For the measurement of the neutral current, the use of .../5A current transformers is
required.
