Danfoss VLT 2800 Operations Instructions download pdf (Page 17)

Alternative fuses 380-500 V drives

VLT

2800

Buss-

mann

E52273

Buss-

mann

E4273

Buss-

mann

E4273

Buss-

mann

E4273

Buss-

mann

E4273

Buss-

mann

E4273

SIBA

E18027

Little

Fuse

E81895

Ferraz-

Shaw-

mut

E16326

7/E2137

Ferraz-

Shaw-

mut

E16326

E2137

RK1/

JDDZ

J/JDDZ T/JDDZ CC/JDDZ CC/JDDZ CC/JDDZ RK1/

JDDZ

RK1/

JDDZ

CC/JDDZ RK1/

JDDZ

2805-

2820

KTS-R20 JKS-20 JJS-20 FNQ-

R-20

KTK-R-20 LP-CC-20 5017906-

020

KLS-R20 ATM-R25 A6K-20R

2855-

2875

KTS-R25 JKS-25 JJS-25 5017906-

025

KLS-R25 ATM-R20 A6K-25R

2880-

2882

KTS-R50 JKS-50 JJS-50 5014006-

050

KLS-R50 - A6K-50R

Alternative Fuses 200-240 V drives

2803-

2822

KTN-R20 JKS-20 JJN-20 5017906-

020

KLS-R20 ATM-R25 A6K-20R

2840 KTN-R25 JKS-25 JJN-25 5017906-

025

KLS-R25 ATM-R20 A6K-25R

Table 1.4: Prefuses for UL application /cUL

1.4.14 RFI switch

Mains supply isolated from earth:

If the frequency converter is supplied from an isolated mains source ( IT mains) or TT/TN-S mains

with grounded leg, the RFI switch is recommended to be turned off (OFF). For further reference,

see IEC 364-3. In case optimum EMC performance is needed, parallel motors are connected or

the motor cable length is above 25 m, it is recommended to set the switch in ON position.

In OFF position, the internal RFI capacities (filter capacitors) between the chassis and the inter-

mediate circuit are cut off to avoid damage to the intermediate circuit and to reduce the earth

capacity currents (according to IEC 61800-3).

Please also refer to the application note

VLT on IT mains

, MN.90.CX.02. It is important to use

isolation monitors that are capable for use together with power electronics (IEC 61557-8).

NB!

The RFI switch is not to be operated with mains connected to the unit. Check that

the mains supply has been disconnected before operating the RFI switch.

The RFI switch disconnects the capacitors galvanically from ground.

The switch Mk9, placed next to terminal 96, should be removed to disconnect the RFI-filter.

The RFI switch is only available on VLT 2880-2882.

1 Quick Guide VLT 2800 Quick Guide

MG.28.M1.02 - VLT

is a registered Danfoss trademark

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: [email protected]

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