Danfoss NEMA-3R Bedienungsanleitung

1.1 Description

The NEMA 3R cover kit is designed for D1h and D2h enclosure

sizes for the following applications:

•

VLT

HVAC Drive FC 102

•

VLT

Refrigeration Drive FC 103

•

VLT

AQUA Drive FC 202

•

VLT

AutomationDrive FC 302

This kit adds a cover to the outside vents of the frequency

converter and provides NEMA 3R compliant protection against

weather and hosed water. The kit is used only with frequency

converters that have E5S in the 13–15 position of the type

code. The type code is found on the nameplate.

1 Protection rating for the NEMA 3R kit

Illustration 1.1 Example of a D-size Enclosure Nameplate

The NEMA 3R kit contains the following parts:

•

Top plate (1).

•

Gland plate with attached gasket (1).

•

NEMA 3R cover (1).

•

Adhesive label (1).

•

3-sectioned plastic bag containing:

-For top plate, lifting eyelets (2) and screws

(6) without captive washers.

-For gland plate, screws (6) for D1h or (8) for

D2h. These screws have captive washers.

-For NEMA 3R cover, screws (6) without

captive washers.

1.2 Kit Part Numbers

Part number Kit description

176F6302 NEMA 3R cover kit for D1h enclosures

176F6303 NEMA 3R cover kit for D2h enclosures

Table 1.1 Part Numbers for the NEMA 3R Cover Kit

1.3 Safety Instructions

WARNING

ELECTRICAL SHOCK HAZARD

VLT® frequency converters contain dangerous voltages when

connected to mains voltage. Improper installation, and

installing or servicing with power connected, can cause

death, serious injury, or equipment failure.

To avoid death, serious injury, or equipment failure:

•

Only use qualied electricians for the installation.

•

Disconnect the frequency converter from all power

sources before installation or service.

•

Treat the bus bar and heat sink as live whenever

the unit has mains voltage connected (including

when the frequency converter is tripped or waiting

for a command).

•

Follow the guidelines in these instructions and local

electrical safety codes.

Installation Instructions

NEMA-3R Cover Kit for D1h–D2h

VLT®FC Series FC 102, FC 103, FC 202, and FC 302

WARNING

DISCHARGE TIME

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 o. Failure to wait the

specied time after power has been removed before

performing service or repair work can result in death or

serious injury.

•

Stop 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 PM motor.

•

Wait for the capacitors to discharge fully. The

minimum duration of waiting time is specied in

Table 1 . 2.

•

Before performing any service or repair work, use

an appropriate voltage measuring device to make

sure that the capacitors are fully discharged.

Voltage

[V]

Frequency converter

model

Minimum waiting

time

(minutes)

3x400 N110–N315 20

N90K–N250 20

3x690 N75K–N400 20

N55K–N315 20

Table 1.2 Discharge Time

1.4 Installation

1.4.1 Installing the Top Plate

1. Along the back side of the top vent opening, remove

the 4 screws (T25).

2. Place the top plate over the top vent opening.

See Illustration 1.2.

3. Secure the top plate with the 6 screws without

captive washers provided in the bag. Torque to 2.3

Nm (20 in/lbs).

4. If lifting eyebolts are needed for the application,

remove the plated eyebolts that came with the unit

and replace with the stainless steel eyebolts provided

in the bag.

NOTICE

UL NEMA 3R RATING

Eyebolts are not required to meet UL NEMA 3R rating.

1Topplate

2Eyebolt

3 Screw without captive washer

Illustration 1.2 Installing NEMA 3R Top Plate

Installation Instructions NEMA-3R Cover Kit for D1h–D2h

VLT

FC Series FC 102, FC 103, FC 202, and FC 302

1.4.2 Installing the Gland Plate

1. Remove the existing gland plate and gasket from the

bottom of the frequency converter by removing 6

screws (T25) from the D1h or 8 screws (T25) from the

D2h. See Illustration 1.3.

2. Make sure that the ange on the frequency converter

is smooth and clean in preparation for the new

gasket.

3. Place the new gland plate over the opening, with the

gasket side facing the opening. See Illustration 1.4.

4. Secure the new gland plate to the frequency

converter using the provided screws with captive

washers (6) for D1h or (8) for the D2h. Torque to 2.3

Nm (20 in/lbs).

1Gasket

2 Screw with captive washer

3Glandplate

Illustration 1.3 Removing Gland Plate

1Gasket

2 Screw with captive washer

3Glandplate

Illustration 1.4 Installing NEMA 3R Gland Plate

Installation Instructions NEMA-3R Cover Kit for D1h–D2h

VLT

FC Series FC 102, FC 103, FC 202, and FC 302

1.4.3 Installing the NEMA 3R Cover

1. Set the NEMA 3R cover over the top of the frequency

converter. Align the NEMA 3R cover with the screw

holes on the top mounting plate and the screw holes

on the side of the unit.

2. Using the 6 screws provided in the bag, loosely

secure the cover to the frequency converter.

3. Torque all 6 screws to 2.3 Nm (20 in/lbs).

4. Apply adhesive label to the cover. See Illustration 1.5.

NOTICE

REMOVING COVER

To remove the NEMA 3R cover after it has been installed,

remove the front 2 screws on the bottom of the unit. The

cover can be removed after the other 4 screws are loosened

since the cover has slotted screw openings.

1 Screw without captive washer

2NEMA3Rsticker

3NEMA3Rcover

4 Screws to remove for taking o the NEMA 3R cover

Illustration 1.5 Installing NEMA 3R Cover

1.4.4 Calculating Nominal Current when Using

a NEMA 3R Cover

The nominal current of a frequency converter with the NEMA

3R cover is 90% of its current rating. For example, in a

FC-302N250T5 standard IP54 frequency converter, the nominal

output current in normal overload mode is 588 A. With the

NEMA 3R cover, the normal overload current is 0.90 x 588 =

529.2 A. The same calculation is used to calculate the nominal

current for the high overload mode.

1.4.5 Derating for Ambient Temperature when

Using a NEMA 3R Cover

Using the NEMA 3R cover kit requires derating due to higher

ambient temperatures within the enclosure. Using SFAVM

(stator ux asynchronous vector modulation) gives greater

switching control, but generates more heat than using 60°

AVM (asynchronous vector modulation). SFAVM switches

throughout the entire cycle, where 60° AVM only switches 2/3

of the time.

The maximum switching frequency is 16 kHz for 60° AVM and

10 kHz for SFAVM. The discrete switching frequencies are

shown in Illustration 1.6.

Installation Instructions NEMA-3R Cover Kit for D1h–D2h

VLT

FC Series FC 102, FC 103, FC 202, and FC 302

Illustration 1.6 Derating for Ambient Temperature

Installation Instructions NEMA-3R Cover Kit for D1h–D2h

VLT

FC Series FC 102, FC 103, FC 202, and FC 302

1.4.6 Dimensions

Illustration 1.7 Exterior Dimensions for D1h with NEMA 3R Kit

Installation Instructions NEMA-3R Cover Kit for D1h–D2h

VLT

FC Series FC 102, FC 103, FC 202, and FC 302

Illustration 1.8 Exterior Dimensions for D2h with NEMA 3R Kit

Installation Instructions NEMA-3R Cover Kit for D1h–D2h

VLT

FC Series FC 102, FC 103, FC 202, and FC 302

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on

order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss

Danfoss A/S

Ulsnaes 1

DK-6300 Graasten

vlt-drives.danfoss.com

*MI70I102*

MI70I102130R0636 06/2015

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