Input Connections - WEG CFW-11 Series User Manual

Installation and Connection
3
PE
(c) Models with direct current power supply (IP00 degree of protection) - special hardware DC - frame size H
(1) For frame size H models 584 A and 625 A it's necessary a line reactor with 3 % voltage drop minimum in the inverter nominal condition.
∆V [%] . V [V]
L = 919 .
LL
f [Hz] . I [A]
R
∆V = Percentage voltage drop.
V = Inverter supply line voltage.
LL
f = Line frequency.
R
I = Reactor current. Consider half the inverter input current for each reactor and an unbalance 15 %. For example, in model 1141 A, the maximum current
of each reactor is 1.15 (1141/2) = 656 A.
(2) For frame size H models 758 A and 804 A it's necessary two line reactors with 3 % voltage drop minimum. Consider a half of inverter input current for
each reactor and an unbalance of 15 %. For example in model 758 A, the maximum current in each reactor is 1.15 (758/2) = 436 A).
(3) According Chapter 8 TECHNICAL SPECIFICATIONS on page

3.2.3.1 Input Connections

DANGER!
Provide a disconnect device for the input power supply of the inverter.
This device shall disconnect the input power supply for the inverter when needed (for instance, during
servicing).
DANGER!
Montez un dispositif de coupure sur l'alimentation du variateur.
Ce composant déconnecte l'alimentation du variateur si cela est nécessaire (ex. pendant l'entretien
et la maintenance).
3-34 | CFW-11
R1 R2 S1 S2 T1
[µH]
Figure 3.25 - (a) to (c) - Power and grounding connections - frame size H
DC power supply CC (3)
Fuses
DC- DC+
T2 U V W
8-1, Table 8.2 on page 8-3 and Table 8.4 on page 8-5.
PE W V U
Shielding