In case the frequency converter is supplied by DC or if the fan must run independently of the power supply, an external power supply can be applied. The connection

is made on the power card.

Terminal No.

100, 101

102, 103

The connector located on the power card provides the connection of line voltage for the cooling fans. The fans are connected from factory to be supplied form

a common AC line (jumpers between 100-102 and 101-103). If external supply is needed, the jumpers are removed and the supply is connected to terminals 100

and 101. A 5 Amp fuse should be used for protection. In UL applications this should be LittleFuse KLK-5 or equivalent.

7.3 Fuses

Branch circuit protection:

In order to protect the installation against electrical and fire hazard, all branch circuits in an installation, switch gear, machines etc., must be short-circuited and

overcurrent protected according to national/international regulations.

Short-circuit protection:

The frequency converter must be protected against short-circuit to avoid electrical or fire hazard. GE recommends using the fuses mentioned below to protect

service personnel and equipment in case of an internal failure in the drive. The frequency converter provides full short-circuit protection in case of a short-circuit

on the motor output.

Overcurrent protection:

Provide overload protection to avoid fire hazard due to overheating of the cables in the installation. The frequency converter is equipped with an internal overcurrent

protection that can be used for upstream overload protection (UL-applications excluded). See par. F-43 Current Limit. Moreover, fuses or circuit breakers can be

used to provide the overcurrent protection in the installation. Overcurrent protection must always be carried out according to national regulations.

Function

Auxiliary supply S, T

Internal supply S, T

AF-650 GP Design Guide

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