Mechanical and Electrical Installation VD520 Series Inverter User Manual
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Three phrase
power
Brake unit
Three phrase
motor
R
S
T
PB P+
P-
U
V
W
Fig 3.6-2 Wiring diagram of main circuit of three-phase and lower than 2.2kW inverter
3.6.1.3 Wiring Diagram of Main Circuit of Three-phase 3.7kw-15kw Inverter
Three phrase
power
Brake unit
Three phrase
motor
P-
P+ PB
R
S
T
U
V
W
Fig 3.6-3 Wiring diagram of main circuit of three-phase 3.7kw-15kw inverter
3.6.1.4 Wiring Diagram of Main Circuit of Three-phase and Higher Than 18.5kw Inverter
Three phase
power
Three phase
motor
R
S
T
P1
P+
P-
U
V
W
Brake unit
Brake resistor
LDC
Fig 3.6-4 Wiring diagram of main circuit of three-phase and higher than 18.5kw inverter
3.6.2 Instructions of Main Circuit Terminals of Inverter:
Table 3-6 Instructions of main circuit terminals of inverter
Terminals
Function Instruction
L, N
Single-phase power supply input terminals, external connection of grid single
phase 220VAC power supply
R, S, T
Input terminal of AC 3-phase power supply, external connection of grid 3phase AC
power supply
U, V, W
Output terminal of 3phase power supply, external connection of AC 3phase motor
P+, P-
Positive and negative terminals of DC bus, external connection of braking unit
terminal
P+, PB
External connection of braking resistor terminal
P1, P+
External connection of DC electric reactor terminal
Grounding terminal