Baldor Baldor, MN850 manual Input Ratings, Storage Conditions, Operating Conditions

Input Ratings

Input Voltage Range	MD7–XXX= 208/230/460 VAC +10% to –15%
	MD8–XXX= 230/460/575 VAC +10% to –15%
Phase	Three Phase
Input Frequency	60/50 HZ ± 5%
Overload Rating	Continuous 115% of FLA; 350% for 30 seconds.
Duty Cycle	Continuous
Peak Inverse Voltage	MD7–XXX= 1400VAC maximum
	MD8–XXX= 1600VAC maximum
S0, S1	12VDC or 24VDC
X1, X2	115VAC (98 – 126VAC) or 230VAC (196 – 253VAC)
Storage Conditions
Ambient Temperature:	–4 to 140° F (-20 to 60 ° C)
Humidity:	0 - 95% RH Non-Condensing
Operating Conditions
Enclosure:	NEMA 1 – Wall mounted (Industrial indoor, general purpose)
	For other enclosures, contact Baldor.
	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 ventilation. 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 - 85% RH Non-Condensing (not to exceed 50% at 40° C ambient).
Control Heat Loss	3.3 Watt per running ampere of input current
Ambient Operating Temperature:	32-113°F (0 to +40 ° C) enclosed
	32-122°F (0 to +40 ° 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 2% per ° C over 40 ° C to 60 ° C Max
Output Relays – K1 and K2 contacts	Category AC1, 230VAC, 3A.

6-2 Specifications and Product Data MN850