Motor Data Setting - Motor Thermal Protection - Prevention Of Motor Stall - Inverter Lock - Siei QUIXDrive F Manuel D'instruction

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Motor data setting - Motor thermal protection - Prevention of motor stall - inverter lock

ARA

UNCTION

METER

Motor rated current

P-09

( from the rating)

Sets the motor ther-

P-10

mic constant

Motor cos ϕ (obtai-

P-11

ned from the rating)

Equivalent stator re-

P-12

sistance

Enables the termal

b-06

protection of the mo-

tor

Limits the acceleration

b-24

current.

Limits the current at

b-25

constant speed.

Limits the voltage du-

b-26

ring deceleration .

Prevents overvoltage.

b-27

P-77

The parameters set

P-78

the current threshold

P-79

as a % of Inom

P-82

Set the deceleration

ramp when b-25 is ac-

tive

P-85

Set max. ref. Df after

wich start the ramp

state.

P-86

Set the delay after wich

P-86

the motor is conside-

red in constant speed

state.

Inom

(P-09)

100%

50%

ANGE

[ D

]

EFAULT

To take advantage of the inverter/motor system features, it is necessary to set the

(20% - 150%) Inom.

characteristics of the motor used, through the parameters.

[ Inom ]

(A)

P-10 can be calculated, (necessary only if the motor thermal protection function is

1 - (120)

enabled, par. b-06). The higher the value set, the higher the motor capacity of supporting

[ 20 ]

(min)

currents higher than the rated one.

0.01 - 1.00

The value of P-12 represents the motor phase resistance in case of star connection,

[ (**) ]

or 1/3 of the phase resistance in case of delta connection. To get the proper value of

P-12, use the function C-06:

0.0 - 25.0

- 1) Use M to select the C menu .....................................

[ 0.0 ] (Ω)

- 2) Use the ⇑, ⇓

- 3) Use the ⇑, ⇓

The display will confirm that the operation has been executed .(To see the measured

value, read the value of P-12 that, if necessary, can be manually modified).

0 = standard motor, not servo-ventilated, at low revolution number not able to support

the rated current (derating), the continuous current of DC braking is reduced by 50%

(the motor is able to support a continuous current that is 50% of the rated one).

0 = off - 1 = on

1 = servo-ventilated motor;specify the type of motor used through parameter b-

[ 1 ]

07.The level reached by the protection can be read in d-10, measured in % of the

max. thermic overload allowed for the motor. When this level reaches 100%, the

protection trips and the inverter is locked.

Excessive current or voltage can cause motor stall or inverter lock conditions due to

protections tripping.The aim of the parameter is to set thresholds that, when exceeded,

trip some actions that limit currents and voltages:

0 = off - 1 = on

b-24: if the threshold programmed through P-77 (in acceleration state and if f<P-70,

[ 1 ]

constant torque zone), or through P-78 (in acceleration state and if f>P-70, constant

0 = off - 1 = on

power zone) is exceeded, the ramp is stopped until the current remains over this

[ 1 ]

threshold.

0 = off - 1 = on

b-25: if the threshold programmed through P-79 is exceeded (constant speed opera-

[ 1 ]

tion) the output frequency is reduced at a rate controlled by P-82; as soon as I falls below

the theshold the frequency start to increase with the selected ramp.

0 = off - 1 = on

b-26: the ramp is stopped when the voltage on filter capacitors is near the overvoltage

[ 0 ]

threshold; when the V falls under the threshold the ramp starts again; NOTE: the function

can be unable to prevent the inverter lock in case of high-inertia loads and short ramps.

b-27: if the voltage on filter capacitors exceeds the overvoltage threshold, the output

20 - 200

voltage is set to zero (corresponding to a coast-to-stop). As soon as the voltage reaches

[ 170 ]

safety levels,a free rotation motor pickup is executed and the deceleration ramp is

restarted.

NOTE: too short ramps can lock the inverter by overvoltage.

The parameters allows to distinguish between the acceleration or deceleration state

0.1 - 25

and the constant speed state . In fact, too short accel. ramps asregards the motor

[ 0.5 ]

( Hz )

capacity, or slight reference variations, either intentional or not, does not mean the motor

to be considered in constant acceleration or deceleration. The switching from one state

0.1 - 25

to the other can be controlled through P-85, P-86:

[ 1 ]

( s )

reference change as regards the constant speed; P-86, instead, set the time after

which, starting from ramp completion, the motor is in constant speed state.

(P-70)/2

—————— QUIXDrive Inverter ——————

⇑, ⇓

⇑, ⇓ keys to select the code C-06 ..................

and press E:

the code C-06 is displayed .........................................

⇑, ⇓

⇑, ⇓ keys to select the code 07

⇑, ⇓

and press E:

the stator resistance is automatically measured.

continuous current for standard motor

( b-07=0 )

DC braking continuous current for

standard motor

(P-70)

INVERTER PARAMETERS

ESCRIPTION

P-85 set the indifference range to

ISPLAY

C-00

ISPLAY

C-06

ISPLAY

0 0 0 0 0

ISPLAY

7 7 7 7 7

25-GB

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Ce manuel est également adapté pour:

Quixdrive v