Delta 28-299A Instruções de Operação descarregar pdf (Página 23)

CAUTION

Power factor correction capacitors must be connected to the

input side of the soft starter. Connecting

power factor

correction capacitors to the output side will damage the soft

starter.

4.10 Fuses

4.10.1 Power Supply Fuses

Semiconductor fuses can be used for Type 2 coordination

(according to IEC 60947-4-2 standard) and to reduce the risk

of damage to SCRs from transient overload currents.

HRC fuses (such as Ferraz AJT fuses) can be used for Type 1

coordination according to IEC 60947-4-2 standard.

NOTE

Adaptive Acceleration Control (AAC) controls the motor's

speed profile, within the programmed time lim

it. This may

result in a higher level of current than traditional control

methods.

For applications using Adaptive Acceleration Control to soft

stop the motor with stop times greater than 30 seconds,

motor branch protection should be selected as follows:

•

Standard HRC line fuses: Minimum 150% motor full

load current

•

Motor rated line fuses: Minimum rating 100/150%

motor full load current

•

Motor control circuit breaker minimum long time

setting: 150% motor full load current

•

Motor control circuit breaker minimum short time

setting: 400% motor full load current for 30

seconds

Fuses recommendations are calculated for 40r C, up to 1000

NOTE

Fuse selection is based on a 400% FLC start for 20 seconds in

conjunction with standard published star

ts per hour, duty

cycle, 40r C ambient temperature and up to 1000 m altitude.

For installations operati

ng outside these conditions, consult

your local supplier.

NOTE

These fuse tables contain recommendations only, always

consult your local supplier to confirm the sele

ction for your

particular application.

For models marked - there is no suitable fuse.

Electrical Installation MCD 500 Operating Instruction

22 MG.17.K3.02 - VLT

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Delta 28-299A Instruções de Operação Página 23

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