Delta Electronics VFD-F Series User Manual

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3-6

3.3 Main Circuit Connection 

Figure 1 for the main circuit terminals 

R(L1)

S(L2)
T(L3)

R

S
T

U(T1)
V(T2)

W(T3)

IM
3~

MC

E

E

+1 +2/B1

B2

-

Brake Resistor 
(Optional)

Motor

Non-fuse breaker
        (NFB)

 

Figure 2 for the main circuit terminals 

R(L1)
S(L2)

T(L3)

R

S
T

U(T1)
V(T2)

W(T3)

IM
3~

MC

E

E

VFDB

+1

+2

-

Brake Resistor (Optional)

Non-fuse breaker

       (NFB)

Motor

Terminal Symbol 

Explanation of Terminal Function 

R/L1, S/L2, T/L3 

AC line input terminals 

U/T1, V/T2, W/T3  AC drive output terminals motor connections 

+1,+2 

Connections for DC Link Reactor (optional) 

+2/B1~B2 

Connections for Brake Resistor (optional) 

+2~ -,+2/B1~ - 

Connections for External Brake Unit (VFDB series) 

           

Earth Ground