Справочник Пользователя для Toshiba VF010H05

the Voltage Ramp or the Current Ramp. Every 

load requires some amount of torque to start from 

a standstill. It is inefficient to begin ramping the 

motor from zero every time, since between zero 

and the WK2 break-away torque level, no work is 

being performed. The initial torque level should be 

set to provide enough torque to start rotating the  

motor shaft, enabling a soft start and preventing 

torque shock damage. Setting this start point too 

high will not damage the starter, but may reduce 

or eliminate the soft start effect.

•  Ramp Time #1: Sets the maximum allowable time 

for ramping the initial voltage or current (torque) 

setting to either of the following: 

1) the Current Limit setting when the motor is still 

accelerating, or 

2) full output voltage if the Current Limit is set to 

maximum.

 

  Increasing the ramp time softens the start process 

by gradually increasing the voltage or current. 

Ideally, the ramp time should be set for the longest 

amount of time the application will allow (without 

stalling the motor). Some applications require 

a short ramp time due to the mechanics of the 

system (i.e. centrifugal pumps, because pump 

problems can occur due to insufficient torque).

•  Current Limit: Sets the maximum motor current 

the starter will allow during Ramping. As the motor 

begins to ramp, the Current Limit feature sets a 

ceiling at which the current draw is held.  Current 

Limit remains in effect until the following occurs: 

1) the motor reaches full speed (detected by the 

At-Speed detection circuit) or 

2) the Overload Protection trips on Motor Thermal 

Overload. 

Once the motor reaches full speed, the Current 

Limit feature becomes inactive. 

 

  In the Voltage Ramp Profile, the voltage output is 

increased until it reaches the Current Limit. Ramp 

time is the maximum amount of time it takes for 

the voltage to increase until the Current Limit 

setting takes over. With some load conditions, the 

Current Limit is reached before the Ramp Time 

expires. 

 

 

  The Current Ramp profile varies the output 

voltage to provide a linear increase in current up 

to the Maximum Current setpoint value. A closed 

loop feedback of motor current maintains the 

Current Ramp profile.

SP2.4 Start Ramp 2: The same options and screen setups 

as Start Ramp 1. Note: CUSTOM ACCEL CURVE 

overrides the voltage or current start in Ramps 1 

and 2 when selected to be the start control mode.

SP2.5 Kick Start: Used as an initial energy burst in 

applications with high friction loads.

•  Kick Start Voltage: The initial voltage (as a  

percent of full voltage value) that is needed to 

start the motor (i.e. Breakaway or Initial Torque).

 

• 

Kick Start Time: The time the initial torque boost 

is applied.

SP2.6 Deceleration: Allows the motor to gradually come to 

a soft stop.

 

•  Start Deceleration Voltage: The first part of 

the deceleration ramp. The soft starter initially 

drops to this voltage level upon receiving a STOP 

command. (Represented as a percent of voltage 

value.)

•  Stop Deceleration Voltage:  The drop-off point of 

the deceleration ramp. (Percent of voltage value.)

•  Deceleration Time:  Decel ramp time.

SP2.7 Timed Output: Used with an AUX 5-8 relay. When 

enabled, and upon a start command, it waits until 

the programmed time plus the run delayed time 

has expired. The relay energizes and remains so 

until a stop command is received. It de-energizes 

upon receiving a stop command. 

SP2.8 Run Delay Time: Can be used with an AUX 5-8 

relay. The delay timer begins upon receipt of the 

start command. The relay will then drop out when 

the time has expired.

SP2.9 At Speed Delay Time: Used with an AUX 4 relay, it 

waits until after the motor reaches the end of ramp 

and the programmed delay time has expired. The 

relay energizes until a stop command has been 

received.