BENSHAW RediStart MX3 Series, Руководство пользователя

Страница: 136 / 238

Starter Type FUN 07
LCD Display
LCD Description
Range Normal Normal Reduced Voltage Soft Starter RVSS. (Default)
Inside Delta Inside Delta, RVSS.
Wye-Delta Wye Delta.
Phase Ctl Open Loop Phase control using external analog input reference.
Curr Follow Closed Loop Current follower using external analog input reference.
ATL Across the line (Full Voltage).
Description
The MX
3
has been designed to be the controller for many control applications; Solid State Starter, both
Normal (outside Delta) and Inside Delta, and electro mechanical starters, Wye Delta, Across the line full
voltage starter, Phase Control/Voltage Follower, Current Follower. In each case, the MX
3
is providing the
motor protection and the necessary control for these applications.
z
NOTE:
For single phase operation, select Normal for the Starter Type parameter, and Single Phase for the
phase order parameter (FUN04).
See Also
Input Phase Sensitivity parameter (FUN04) on page 126.
Theory of Operation section 7.7.2 , Inside Delta Connected Starter using the MX
3
on page 167.
Theory of Operation section 7.8, Wye-Delta Operation on page 168.
Theory of Operation section 7.11, Phase Control on page 173.
Theory of Operation section 7.12, Current Follower on page 175.
Heater Level FUN 08
LCD Display
Range
Off, 1 – 40% FLA
(Default Off)
Description
The Heater Level parameter sets the level of D.C. current that reaches the motor when the motor winding
heater/anti-windmilling brake is enabled. The motor winding heater/anti-windmilling brake can be used to
heat a motor in order to prevent internal condensation or it can be used to prevent a motor from rotating.
z
NOTE: The motor can still slowly creep when the anti-windmilling brake is being used. If the motor has
to be held without rotating, a mechanical means of holding the motor must be used.
The motor winding heater/anti-windmilling brake operation may be controlled by a digital input and by a
heater disable bit in the starter control Modbus register. There are two methods of using the digital inputs,
either the input is an enable or disable.
Enabled: When the DI 1, 2, 3, 4, 5, 6, 7, 8 inputs are programmed as Heat Enable Inputs, the input may be
used to control when heating/anti-windmilling is applied. The Heater Level parameter must be set, the starter
stopped and this input must be high for heating to occur.
Disabled: When the DI 1,2, 3, 4, 5, 6, 7, 8 inputs are programmed as Heat Disable Inputs, the input may be
used to control when heating/anti-windmilling is applied. The Heater / Anti-Windmill Level parameter must
be set and this input must be low for heating to occur.
If no digital inputs are programmed as heater enabled or disabled and HEATER LEVEL is
programmed greater than 0, the heater is applied at all times when the motor is stopped.
The level of D.C. current applied to the motor during this operation needs to be monitored to ensure that the
128
6 - PARAMETER DESCRIPTION
FUN: Starter Type
07
Normal
FUN: Heater Level
08
Off