Name: Danfoss VLT Micro Drive FC 51
Brand: Danfoss
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3.2. Mains Connection

3.2.1. Connecting to Mains

Step 1: First mount earth cable.

Step 2: Mount wires in terminals L1/L, L2 and

L3/N and tighten.

Illustration 3.1: Mounting of earth cable and mains

wires.

For 3-phase connection, connect wires to all

three terminals.

For single-phase connection, connect wires to

terminals L1/L and L3/N.

Illustration 3.2: Three-phase and single-phase

wire connections.

3.3. Motor Connection

3.3.1. How to Connect the Motor

See the chapter

Specifications

for correct dimensioning of motor cable cross-section and length.

• Use a shielded/armored motor cable to comply with EMC emission specifications, and

connect this cable to both the decoupling plate and the motor metal.

• Keep motor cable as short as possible to reduce the noise level and leakage currents.

For further details on mounting of the decoupling plate, please see instruction MI.02.BX.YY.

All types of three-phased asynchronous

standard motors can be connected to the fre-

quency converter. Normally, small motors are

star-connected (230/400 V, Δ/Y). Large mo-

tors are delta-connected (400/690 V, Δ/Y).

Refer to motor nameplate for correct connec-

tion and voltage.

Illustration 3.3: Star and delta connections.

VLT Micro Drive FC 51 Operating Instructions 3. Electrical Installation

MG.02.A2.02 - VLT

is a registered Danfoss trademark

Danfoss VLT Micro Drive FC 51 Operating Instructions

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