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HP Anab EQ5 User Manual

Page 82

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TECO

–Westinghouse Motor Company Function Explanation 76

Instantaneous switching to another power line (when the

power of an operating motor is cut off or power failure
occurs) creates a large phase difference between the
line voltage and the voltage remaining in the motor,
which may cause electrical or mechanical failure. To
rapidly switch power lines, enter the remaining voltage
attenuation time to wait for the voltage remaining in the
motor to attenuate. This function operates at restart
after a momentary power failure.

H 1 3

R E S T A R T T

Setting range: 0.1 to 5.0 seconds

When the momentary power failure time is shorter than

the wait time value, a restart occurs following the wait
time. When the power failure time is longer than the
wait time value, a restart occurs when the inverter is
ready to operate (after about 0.2 to 0.5 second).


This function determines the reduction rate of the output

frequency for synchronizing the inverter output frequency
and the motor speed. This function is also used to
reduce the frequency and thereby prevent stalling under
a heavy load during normal operation.

H 1 4

F A L L R A T E

Setting range: 0.00, 0.01 to 100.00 Hz/s

When 0.00 is set, the frequency is reduced according to

the set deceleration time.

Note:
A too large frequency reduction rate is may temporarily
increase the regeneration energy from the load and
invoke the overvoltage protective function. Conversely,
a rate that is too small extends the operation time of the
current limiting function and may invoke the inverter
overload protective function.



This function is for when 2 (deceleration-to-stop at power

failure) or 3 (operation continuation) is set to "F14
Restart after momentary power failure (operation
selection)." Either function starts a control operation if
the main circuit DC voltage drops below the set operation
continuation level.

H 1 5

H O L D V

Setting range 230 V series: 200 to 300V

460 V series: 400 to 600V

When power supply voltage to the inverter is high,

control can be stabilized even under an excessive load
by raising the operation continuation level. However,
when the level is too high, this function activates during
normal operation and causes unexpected motion.
Please contact TWMC electric when changing the initial
value.















As the power to an external operation circuit (relay

sequence) and the main power to the inverter is
generally cut off at a power failure, the operation
command issued to the inverter is also cut off. This
function sets the time an operation command is to be
held in the inverter. If a power failure lasts beyond the
self-hold time, power-off is assumed, automatic restart
mode is released, and the inverter starts operation at
normal mode when power is applied again. (This time
can be considered the allowable power failure time.)

H 1 6

S E L F H O

L

D

T

Setting range: 0.0 to 30.0 seconds, 999


When "999" is set, an operation command is held (i.e.,
considered a momentary power failure) while control power
in the inverter is being established or until the main circuit
DC voltage is about 100Vdc.

This function controls motor torque according to a

command value.

This function automatically extends accelerating time

against acceleration operation of 60 seconds or longer to
prevent an inverter trip resulting from a temperature rise
in inverter due to overcurrent.

Set value 0: Inactive

1: Active

(When the active drive function is activated, the
acceleration time is three times the selected time.)

H 1 9

A U T

R E D

H19

Active drive

H16

Auto-restart (OPR command selfhold time)

H13

Auto-restart (Restart time)

H14

Auto-restart ( Freq. fall rate)

H15

Auto-restart (Holding DC voltage)

H14

Auto-restart (Freq. fall rate)

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