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Danfoss MCD 100-007 4 kW [5/7] Adjustments
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1.3.5 Adjustments
MCD 100 provides Timed Voltage Ramp up. This means
that the motor voltage is gradually ramped up to full line
voltage according to the time set by the rotary switch.
To avoid soft starter damage, proper settings of initial
torque level and ramp up time must be considered. It is
important to ensure that the motor is accelerated to full
speed before the soft starter is in full on mode.
Setting the initial torque level:
1. Set ramp up time to max.
2. Set initial torque switch to min.
3. Apply control signal for a few seconds. If the
motor does not rotate immediately increase the
initial torque level with on step and try again.
Repeat until the motor starts to rotate
immediately after control signal is applied.
Setting the ramp up time:
1. Set ramp up time to max.
2. Decrease the ramp up time until mechanical
surge is observed.
3. Increase ramp up time with one step.
1.3.6 Fuses and short circuit protection
In case of short circuits normal fuses can be used to
protect the installation – but not the soft starter. The
following table lists data for the selection of normal fuses.
MCD 100-001 Protection max 25 A gL/gG
MCD 100-007 Protection max 50 A gL/gG
MCD 100-011 Protection max 80 A gL/gG
Semiconductor fuses may be used with MCD 100 soft start
controllers. Use of semiconductor fuses will protect the
SCR’s in case of short circuits and reduce the potential of
SCR damage due to transient overload currents. When
selecting semiconductor fuses ensure that the fuse has a
lower total clearing I
2
t rating than the SCR (see data in the
following table), and that the fuse can carry the start
current for the actual start duration.
MCD 100
SCR I
2
t
(A
2
s)
MCD 100-001 72
MCD 100-007 1800
MCD 100-011 6300
1.3.7 Dimensions
Illustration 1.2 MCD 100 - 001
Illustration 1.3 MCD 100 - 007
Illustration 1.4 MCD 100 - 011
All about MCD 100 MCD 100 Design Guide
MG12A202 - VLT
®
is a registered trademark 5
1
1
Содержание
- Application examples 1
- Contents 1
- Technical data 1
- Acceleration times adjustable 0 10 seconds 2
- Adjustments 2
- All about mcd 100 mcd 100 design guide 2
- Automatic adaptation to 50 60 hz 2
- Automatic detection of missing phases 2
- Breakaway function kick start 2
- Built in varistor protection 2
- Ce en 60947 4 2 2
- Compact modular design 2
- Deceleration times adjustable 0 10 seconds 2
- Din rail mountable 2
- Features 2
- Initial torque adjustable up to 85 2
- Introduction 2
- Led status indication 2
- Motor load max 25 a 2
- Selection guide 2
- Thanks to the adjustable initial torque and the unique breakaway kick start function the soft starter can be optimized for almost any application the mcd 100 soft starters are typically used on motor applications where a smooth stat and or stop is advantageous such as conveyors fans pumps compressors and high inertia loads mcd 100 soft starters are also obvious as replacement for star delta starters 2
- The digitally controlled soft starter features accurate settings and easy installation the controller has individually adjustable acceleration and deceleration times 2
- The mcd 100 soft starters are designed for soft starting and stopping of 3 phase a c motors thus reducing the inrush current and eliminating the damaging effects of high starting torque surges 2
- Ul 508 2
- Universal control voltage 24 480 v ac dc 2
- Unlimited start stop operations per hour 2
- All about mcd 100 mcd 100 design guide 3
- Technical data 3
- All about mcd 100 mcd 100 design guide 4
- Application requiring a higher starting torque in some cases the application will need a high break away torque here the initial starting torque level can be combined with a kick start function the kick start is a period of 200 ms where the motor receives full voltage 4
- Functional description 4
- Functional diagram 4
- Illustration 1 mcd 100 007 mcd 100 011 4
- Initial torque the initial torque is used to set the initial starting voltage this way it is possible to adapt the controller to an 4
- Is a registered trademark 4
- Led status indication 4
- Mg12a202 vl 4
- Ramp up during ramp up the controller will gradually increase the voltage to the motor until it reaches full line voltage the motor speed will depend on the actual load on the motor shaft a motor with little or no load will reach full speed before the voltage has reached its maximum value the actual ramp time is digitally calculated and will not be influenced by other settings net frequency or load variations 4
- Soft stop during ramp down the controller will gradually reduce the voltage to the motor thus reducing the torque and current as a consequence the motor speed will fade off the soft stop feature is advantageous to avoid liquid hammering and cavitation on pumps and to avoid goods tilting on conveyors 4
- Wiring 4
- Adjustments 5
- Dimensions 5
- Fuses and short circuit protection 5
- All about mcd 100 mcd 100 design guide 6
- Application examples 6
- Clearance between controller and top and bottom walls must be minimum 30 mm 1 6
- Clearance between two vertical mounted controllers must be minimum 80 mm 3 5 6
- Depending on the application the thermostat can be connected in series with the control circuit of the main contactor when the temperature of the heat sink exceeds 90 c the main contactor will be switched off a manual reset is necessary to restart this circuit for wiring connections see 1 application examples 6
- Example 1 the thermostat can be connected in series with the control input of the soft starter when the temperature of the heat sink exceedes 90 c the soft starter will be switched off 6
- If required the controller can be protected against overheating by inserting a thermostat in the slot on the right hand side of the controller 6
- Mounting instructions 6
- Operating at high temperatures 6
- Order up 62 thermostat 037n0050 6
- Over heat protection 6
- Overheat protection 6
- The controller is designed for vertical mounting if the controller is mounted horizontally the load current must be reduced by 50 6
- The controller needs no side clearance 6
- Input controlled soft start 7
- Line controlled soft start 7
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