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6-2 Specifications and Product Data MN894
Multipurpose Control Specifications
Three Phase Starters
Input
Voltage
MA7-008 MA7-016 MA7-030
Voltage
VAC
MA8-008 MA8-016 MA8-030
VAC
3PH 60Hz
HP I
C
HP I
C
HP I
C
230 2 5 10
460 8
8
10
16
20
30
575 5 10 25
Input
Voltage
MB7-055 MB7-080 MB7-160 MB7-250 MB7-420 MB7-600 MB7-840
Voltage
VAC
MB8-055 MB8-080 MB8-160 MB8-250 MB8-420 MB8-600 MB8-840
VAC
3PH 60Hz
HP I
C
HP I
C
HP I
C
HP I
C
HP I
C
HP I
C
HP I
C
208 15 25 50 75 150 200
230 20
55
30
80
60
160
100
250
150
420
250
600
300
840
460 40
55
60
80
125
160
200
250
350
420
500
600
700
840
575 50 75 150 250 400 600 800
I
C
= Continuous Current Rating
Input Ratings
Input Frequency 60/50 HZ ± 5%
Input Voltage +10% to −15% of Voltage Rating (except 575 VAC, max= 620VAC)
Overload Rating Continuous 115% of FLA; 400% for 30 seconds.
Phase Three Phase
Duty Continuous
Storage Conditions
Ambient Temperature: -4 to 140°F (-20 to 60 °C)
Humidity: 0 - 95% RH Non-Condensing
Operating Conditions
Enclosure: Open Panel (Indoor)
NEMA 1 (Industrial indoor, general purpose)
NEMA 12 (Industrial indoor, dust proof)
NEMA 4 (Outdoor)
The SCR’s generate about 3.3 watts of heat per running amp (motor FLA). If the control
is mounted in an enclosure, the installer must provide fans or blower with sufficient ventila-
tion. Fan or blower should be rated for at least 0.8 CFM per ampere of motor FLA rating.
Baldor provided enclosures are designed to dissipate the heat from the SCR’s.
Humidity: 0 - 95% RH Non-Condensing
Control Heat Loss 3.3 Watt per running ampere of input current
Ambient Operating Temperature: 32-113°F (0 to +45 °C) enclosed
32-122°F (0 to +50 °C) open panel
Altitude: Sea level to 3300 Feet (1000 Meters)
Derate 1% per 330 Feet (100 Meters) above 3300 Feet
Derating Derate Amp rating 1% per 330 Feet (100 Meters) above 3300 Feet
Derate Amp rating 1.5% per °C over 45 °C to 55 °C Max