Danfoss FK11-FB11 iC7-Automation Series Frequency Converters Installation Guide

Installation Guide
Common-mode Filter Kit for
FK11/FB11 and FK12/FB12
iC7 Series Frequency Converters

Overview

1.1 Description
The common-mode filter kit is designed to fit iC7 Series Frequency Converters in the following frames:

• FB11
• FK11
• FB12
• FK12

The frame is listed on the frequency converter product label.
1.2 Kit Numbers
Use these instructions with the following kits.
Table 1: Numbers for Common-mode Filter Kits

1.3 Items Supplied
Table 2: Contents of Common-mode Filter Kit

Installation

2.1 Safety Information

NOTICE
QUALIFIED PERSONNEL
Only qualified, Danfoss authorized personnel are allowed to install the parts described in these installation instructions.
Disassembly and reassembly of the frequency converter must be done in accordance with the service guide.
Use the standard fastener torque values from the service guide, unless the torque value is specified in these instructions.

WARNING

DISCHARGE TIME (40 MINUTES)
The frequency converter contains DC-link capacitors, which can remain charged even when the frequency converter is not powered.
High voltage can be present even when the warning LED indicator lights are off. Failure to wait 40 minutes after power has been removed before performing service or repair work can result in death or serious injury. Stop the motor.
Disconnect AC mains and remote DC-link power supplies, including battery back- ups, UPS, and DC-link connections to other frequency converters.
Disconnect or lock the motor.
Disconnect any brake option.
Disconnect any DC connector option.
Wait 40 minutes for the DC-link capacitors to discharge fully.
Before performing any service or repair work, measure the voltage level to verify that the capacitors are fully discharged.

WARNING

ELECTRICAL SHOCK HAZARD
The frequency converter contains dangerous voltages when connected to mains voltage. Improper installation, and installing or servicing with power connected, can cause death, serious injury, or equipment failure.
Only use qualified electricians for the installation.
Disconnect the frequency converter from all power sources before installation or service.
Treat the frequency converter as live whenever the mains voltage is connected.
Follow the guidelines in these instructions and local electrical safety codes.

NOTICE
ELECTROSTATIC DISCHARGE
Electrostatic discharge can damage components.
Ensure electrostatic discharge before touching internal frequency converter components, for example by touching a grounded, conductive surface or by wearing a grounded armband.

2.2 Removing the Cable Clamps and Cable Brackets
Before installing the common-mode filter, use the following steps to remove the cable clamps and cable brackets.

Procedure

1. Unfasten 6–10 screws (T25) and open the cabinet door.
   Number of screws varies based on cabinet size.

2. If the touch protection option is present, unfasten 6–10 screws (T20) and remove the option.
   Number of screws varies based on cabinet size.

3. Remove the customer wiring from the mains and motor terminals.

4. Remove the cable clamps that sit below the mains and motor terminal blocks.
   No tools are required to remove the clamps. Tip the clamps downward at a 45° angle to unhook them from the cable clamp brackets. See Illustration 1.

5. Remove the outer cable bracket:
   – a. Loosen 4 screws (T25), 1 at each corner of the outer cable clamp bracket.
   – b. Slide the bracket upward until the screws line up with the largest part of the keyhole opening.
   – c. Pull the bracket forward to remove it.
   Refer to Illustration 2.

6. Remove the inner cable bracket:
   – a. Unfasten 4 M6 nuts (10 mm), 1 from each corner of the bracket.
   To reach the M6 nuts, use the access holes in the corners of the bracket. See Illustration 3.
   – b. Remove the bracket from the frequency converter.
   Keep the M6 nuts. The common-mode filter requires 2 M6 nuts for installation.
   See Illustration 4 for all existing fasteners to remove and reuse during the filter installation.

2.3 Installing the Common-mode Filter
To install the common-mode filter, use the following steps. See Illustration 5.

Procedure

1. Position the common-mode filter below the motor terminal block and to the right of the EMC shield.
   The common-mode filter fits over the studs where existing fasteners were removed. See Illustration 4).

2. Using the existing fasteners, install the common-mode filter:
   – a. Secure the top of the common-mode filter with 2 M8 nuts (13 mm).
   – b. Secure the left side of the filter to the EMC shield with 1 M5 nut (8 mm).
   – c. Secure the right side of the filter with 2 M6 nuts (10 mm).

3. Use the 3 M10 nuts (13 mm) from the kit to provide ground connections to the 3 screws below the filter core.
   The original ground points are used to attach the filter and cannot be used for grounding.

4. Reconnect the customer wiring to the mains and motor terminals.
   Use EMC metal cable glands to ground the EMC shields of the cables. Danfoss recommends SKINTOP® or similar EMC metal cable glands for passing cables through the cable entry plate and for grounding the cable shield. (Cable glands not provided.) See Illustration 6.

5. If present, install the touch protection option and fasten 6–10 screws (T25).
   Number of screws varies based on cabinet size.

6. Close the door and tighten 6–10 screws (T25).
   Number of screws varies based on cabinet size.

Danfoss A/S
Ulsnaes 1
DK-6300 Graasten
drives.danfoss.com

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AN428032666373en-000101 / 136R0315

References

• Global AC drive manufacturer - Danfoss Drives | Danfoss

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