Three-Phase Input Connection; Connection To Power Section; Ground Connection - Johnson Controls VSD II Series Installation Manual

Installation Requirements

Connection to Power Section

The following figure shows the general connections for the
frequency inverter in the power section.

Three-Phase Input Connection

Terminal Designations in the Power Section
L1, L2, L3: Connection terminals for the supply voltage
●
(input, input voltage):
Three-phase AC voltage: Connection to: L1, L2, L3
●
U/T1, V/T2, W/T3: Connection terminals for the
●
three-phase line to the AC motor (output, frequency
inverter)
PE: connection for protective ground (reference
●
potential). PES with mounted cable routing plate for
shielded cables
34 VSD Series II LIT-12011772—October 2012 www.johnsoncontrols.com
15 mm
(0.59 in)
PES
Connection to Power Section
Input
L1 L2 L3
PE L1 L2 L3

Ground Connection

PZ2
PE
M4
11.5 lb-in
(1.3 Nm)
The ground connection is connected directly with the cable
clamp plates.
The shielded cables between the frequency inverter and the
motor should be as short as possible. Connect the shielding
on both ends and over a large surface area with protective
ground PES (Protective Earth Shielding). You can connect the
shielding of the motor cable directly to the cable clamp plate
(360 degrees coverage) with the protective ground.
The frequency inverter must always be connected to the
ground potential via a grounding cable (PE).
Output
U/T1 V/T2 W/T3
V1
U1
W1
3 ~
Motor
0.17 in
(4.3 mm)