Emerson iPro SERIES Informações Técnicas descarregar pdf (Página 10)

Technical Information

D7.21.2/1011/E

10/17

Figure 7: CoreSense™ module with current sensor

4.2 Terminal box and current sensing transformer connections

For space reasons inside the compressor terminal box wires L1 and L2 connected to the sensor module need to be

exchanged in such a way that the black wire is connected to terminal 2 (V) and the white wire goes to terminal 1

(U) on the terminal plate as shown on the drawing. This results in that the current of L2 is sensed instead of L1.

4.2.1 Installation of current sensing module

One of the motor power leads passes through the “toroid” (current

sensing module). Information from the current sensing module is

used to determine running amps, power consumption and locked

rotor conditions. There are 3 voltage sensing leads attached to the

motor terminals and connected to the sensor module. Two of the

leads are white, and one is black. For proper calculation of power

factor and motor power it is necessary for the black voltage sensing

lead and the power lead through the current sensing module to be

connected to the same motor terminal.

Class II transformers have a maximum VA (Volt-Ampere) rating of

less than 100 and a maximum secondary output of 30 VAC.

Figure 8: Current sensing module and T-Box wiring

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17

Sem comentários

Emerson iPro SERIES Informações Técnicas Página 10