BALDOR
262
Soft Starters & Dynamic Brakes
Farm Duty
Motors
Definite Purpose
Motors
Unit Handling Motors
Brake Motors
200 & 575 Volt
Motors
IEC Frame
Motors
50 Hertz
Motors
Inverter/Vector
Motors & Controls
DC Motors
and Controls
Soft Start &
Dynamic Brakes
Soft Starter
30 thru 1040 Amps
208-575V 50/60 Hz.
Applications:
Controlled ramp start and stop, minimize spillage in
material handling, reduced water hammer in pumping, reduced wear on
mechanical gears, eliminate high inrush current. Typical applications include:
pumps, conveyors, fans, reciprocating compressors and screw and rotary
compressors, crushers and mills.
Features:
Six SCR three phase voltage control with programmable
starting ramp and current limit. Application software allows easy load type
selection and starting/stopping parameter settings. Current sensing provides
true starting torque control and motor overload protection during starting
and running. Open panel design, with quick ship program for enclosed
combination starters.
Output
Voltage (Ue)
208-460V, 230-575V
Current (Ie)
30-1040A
Horsepower
Voltage and application rated,
7.5 Hp @ 208V to 1000 Hp @ 600V
Short Circuit
Size dependent
10 kA (30A) to 85 kA (1040A)
Altitude Derate
0.7% per 330 feet above 3300 feet
Temperature Derate
0.8% per one °C above 40°C up to 50°C
Starts per Hour
MST-030 - MST-300 – 30 starts; MST-370 - MST-1050 – 10 starts (50% on / 50% off time)
Overload
Normal Duty
400% of motor current for 30 seconds starting capacity and Class 10 moor running protection
Heavy Duty
350-400% of motor current for 60 seconds starting capacity and Class 30 motor running protection
±nput
RatIngs
Voltage
208 - 575V
Frequency
50/60 Hz
Phase
Three Phase
Control
Spec
Control Method
Microprocessor controlled full wave, three phase, six thyristor firing
Start Time
Programmable 1-30 seconds, (Normal Range) 1-120 seconds (Heavy Duty Range)
Stop Time
Programmable 0-255 seconds
Voltage Pedestal
Programmable: Start 10-60%, Kick 60-90%, Stop 10-60%
Current Limit
800% of rated current
Power Factor
Continuously monitored to eliminate motor over-flux for power optimizing
Control Power (U
s
)
110-130VAC, 50/60 Hz
SCR
Spec
Peak Inverse Voltage
460VAC controllers 1400V
575VAC controllers 1600V
Heat Loss
3.3 Watts per 1 Ampere running current
AmbIent
CondItIons
Temperature
Storage: -13°F to 158°F (-25°C to +70°C) operation; 32°F to 104°F (0°C to +40°C)
Cooling
Convection / Forced Air included / Additional cooling required when installed in enclosure
Altitude
3300 feet above sea level
Tools
Simulator
Windows
®
based application tool for programming simulation and settings navigation learning
Sizing ProSoft
Windows
®
based starter selection tool with Baldor motor information to aim with proper rating choice for starter and motor
Design Specifications
• MOV protection
• Current feedback
• Microprocessor Control
• Open chassis
• Keypad interface
• Two programmable inputs
• Three programmable form
C outputs
Quick Ship
• NEMA 12/4 enclosures with
bypass contactor
• Door mounted disconnect
• Input circuit breaker
• 2 wire Hand-Off-Auto switch
• Indicating lights
• Enclosed combination starters,
with circuit breaker disconnect
Environmental and
Operating Conditions
• Input voltage
3 phase 208-575V
• Control voltage 120VAC
• Input frequency 50/60 Hz
• Humidity 90% RH condensing
• 3000 feet altitude
• 40°C ambient temperature
Protective Features
• Selectable class motor overload
• Starting and running motor overload
• Locked rotor
• Underload
• Current phase imbalance
• High current
• Phase reversal (input voltage)
• Motor PTC input
• Low/high current warning
• Phase loss