Reliance Electric™ Drives

Reliance Electric™ Drives Service & Support


MD60 Drives


Elevation - 1,000 meters without derating
- Derate 1% for every 90 meters above 1000 meters

Ambient operating temperature without derating IP20: -10°C (14°F) to 50°C (122°F)
NEMA 1/IP30: -10°C (14°F) to 40°C (104°F)
Storage temperature (all constructions) -40°C (-40°F) to 85°C (185°F)
Relative Humidity 0% to 95%, non-condensing
Shock (operating) 15G peak for 11 ms duration (+ 1.0 ms)
Vibration (operating) 1 G peak, 5 to 2000 Hz
Input/Output Rating
Voltage Output 0 to Nominal AC Line Voltage Level; IGBT Transistors, PWM waveform
Output Frequency 0-240 hz (programmable)
Efficiency 97.5% (typical)
Carrier Frequency 2-16 kHz. Drive rating based upon 4 kHz
Frequency Accuracy Digital Within + 0.05% of set output frequency
Frequency Accuracy Analog Within 0.5% of maximum output frequency
Speed Regulation - Open Loop with Slip Compensation + 2% of base speed across a 40:1 speed range
Stop Modes Multiple programmable stop modes including: Ramp, Coast, DC-Brake, Ramp-to-Hold, and S-Curve
Accel/Decel Two independently programmable accel and decel times. Each may be programmed from 0-600 seconds (0.1 second
Intermittent Overload 150% Overload capability for up to 1 minute
200% Overload capability for up to 3 seconds
Internal Braking IGBT included on all ratings 0.75 kW (1 HP) and larger
Electronic Motor Overload Protection Class 10 protection with speed-sensitive response
Digital Control Inputs
SRC (source) Mode 18-24 V = ON; 0-6 V = OFF
SNK (Sink) Mode 0-6 V = ON; 18-24 V = OFF
Analog Control Inputs
4-20 mA Analog 250 ohm input impedance
0-10 V DC Analog 100k ohm input impedance
External Pot 1-10 k ohms, 2 Watt minimum
Fuses & Circuit Breakers
Recommended Fuse Type UL Class J, CC, T or Type BS88; 600 V (550 V) or equivalent
Protective Features
Bus Overvoltage Trip 100-120 & 200-240 VAC: 405 VDC
380-480 VAC: 810 VDC
Bus Undervoltage Trip 100-120 & 200-240 VAC: 210 VDC
380-480 VAC: 390 VDC
Software Current Limit 150% for 60 sec., 200% for 3 sec.; Class 10
Hardware Current Limit 200% Hardware Limit
Instantaneous Current Limit 300% Instantaneous Fault
Power Dip Ride-Through Minimum 0.5 seconds - typical 2 seconds
Fault-Free Ride-Through 100 milliseconds
Motor Lead Length (specific to 440-480 motor operation)
Motor insulation of 1000 Vp-p motor cable length 15 meters (49 ft)
Motor insulation of 1200 Vp-p motor cable length 40 meters (131 ft)
Motor insulation of 1600 Vp-p motor cable length 170 meters (558 ft)
Agency Certifications UL and cUL Listed to UL508C and CAN/CSA-C2.2 Mp/ 14-M91
European Low Voltage Directive (73/23/EEC)
EN50178 Electronic equipment
European EMC Directive (89/336/EEC)
EN61800-3 (Second Environment)
Austrailian EMC Directive
Consult the MD60 Instruction Manual for details
pertaining to conformance to CE Directives.



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