Application examples
EL34xx
260
Version: 1.5
7.1
Power measurement on motor with 2 or 3 current
transformers
WARNING
WARNING: Risk of electric shock!
If you do not connect terminal point N with the neutral conductor of your mains supply, you have to earth
terminal point N, in order to avoid dangerous overvoltages in the event of a fault with a current transformer!
NOTE
Attention! Risk of device damage!
Avoid confusing the current and voltage circuit during connection, since the direct connection of mains volt-
age to the terminal points for the current transformers (typical input resistance 220 mΩ) would destroy the
power measurement terminal!
EL3443
• The voltage is measured via the connections L1, L2 and L3.
• The current is measured with two
L1
and I
L2
.
• The sum of all currents in the 3-phase mains network is 0. The value in circuit I
L3
can be obtained
accordingly by wiring the EL3443.
Fig. 161: EL3443, Power measurement with 2 current transformers on a motor
In the circuit shown above (Fig.
EL3443, power measurement with 2 current transformers on a motor
),
ensure that the three-phase system is either earth-free or has an earthed star point. Alternatively a
transformer can be included in a Yy0 circuit.
EL3453
• The voltage is measured via the connections L1, L2 and L3.
• The current is measured with three
L1
, I
L2
.and I
L3
Содержание EL34 Series
Страница 1: ...Documentation EL34xx 3 phase energy and power measurement terminals 1 5 2019 09 05 Version Date ...
Страница 2: ......
Страница 52: ...Mounting and wiring EL34xx 52 Version 1 5 Fig 35 Other installation positions ...
Страница 58: ...Mounting and wiring EL34xx 58 Version 1 5 EL3453 LEDs and connection Fig 40 EL3453 LED s ...
Страница 92: ...Commissioning EL34xx 92 Version 1 5 Fig 86 Incorrect driver settings for the Ethernet port ...
Страница 103: ...Commissioning EL34xx 103 Version 1 5 Fig 105 EtherCAT terminal in the TwinCAT tree left TwinCAT 2 right TwinCAT 3 ...
Страница 130: ...Commissioning EL34xx 130 Version 1 5 Fig 147 Process Data tab SM3 EL3443 ...
Страница 131: ...Commissioning EL34xx 131 Version 1 5 Fig 148 Process Data tab SM3 EL3453 ...
Страница 132: ...Commissioning EL34xx 132 Version 1 5 Fig 149 Process Data tab SM3 EL3483 ...
Страница 160: ...Commissioning EL34xx 160 Version 1 5 Index F802 PMX Guard Settings ...
Страница 183: ...Commissioning EL34xx 183 Version 1 5 Index F802 PMX Guard Settings ...
Страница 205: ...Commissioning EL34xx 205 Version 1 5 Index 1C13 TxPDO assign ...
Страница 214: ...Commissioning EL34xx 214 Version 1 5 Index F802 PMX Guard Settings ...
Страница 242: ...Commissioning EL34xx 242 Version 1 5 Index 1C13 TxPDO assign ...
Страница 259: ...Application examples EL34xx 259 Version 1 5 7 Application examples ...