Commissioning
EL3773
104
Version: 2.5
Fig. 112: Power measurement with 2 current transformers on a motor
In the circuit shown above (Fig.
Power measurement with 2 current transformers on a motor
), ensure that the
three-phase system is either earth-free is or has an earthed star point. Alternatively a transformer can be
included in a Yy0 circuit.
Power measurement in a single-phase mains network with ohmic consumers
• The voltage is measured via connections L1, L2, L3 and N.
• The current is measured via three
and the connections I
L1
, I
L2
, I
L3
and I
N
(star point of the current transformers).
WARNING
WARNING: Risk of electric shock!
Bring the Bus Terminals system into a safe, de-energized state before starting mounting,
disassembly or wiring of the Bus Terminals.
Attention
Attention! Risk of device damage!
Avoid confusing the current and voltage circuit during connection, since the direct connec-
tion of mains voltage to the terminal points for the current transformers (typical input resis-
tance 220 mΩ) would destroy the power measurement terminal!
Summary of Contents for EL3773
Page 1: ...Documentation EL3773 Power Monitoring Oversampling Terminal 2 5 2018 03 13 Version Date...
Page 2: ......
Page 6: ...Table of contents EL3773 6 Version 2 5...
Page 39: ...Mounting and wiring EL3773 39 Version 2 5 Fig 29 Other installation positions...
Page 41: ...Mounting and wiring EL3773 41 Version 2 5 Fig 31 Block diagram...
Page 47: ...Commissioning EL3773 47 Version 2 5 Fig 38 Incorrect driver settings for the Ethernet port...
Page 147: ...Commissioning EL3773 147 Version 2 5 Fig 168 Confirming program start...
