Danfoss VLT Micro Drive FC 51 Design Guide

Protection and features
•
Electronic thermal motor protection motor protection against overload.
•
Temperature monitoring of the heatsink ensures that the frequency converter trips in case of overtemperature.
•
The frequency converter is protected against short-circuits between motor terminals U, V, W.
•
If a motor phase is missing, the frequency converter trips and issues an alarm.
•
If a mains phase is missing, the frequency converter trips or issues a warning (depending on the load).
•
Monitoring of the intermediate circuit voltage ensures that the frequency converter trips if the intermediate circuit
voltage is too low or too high.
•
The frequency converter is protected against earth faults on motor terminals U, V, W.
Mains supply (L1/L, L2, L3/N)
Supply voltage 200-240 V ±10%
Supply voltage 380-480 V ±10%
Supply frequency 50/60 Hz
Max. imbalance temporary between mains phases 3.0% of rated supply voltage
True Power Factor ≥0.4 nominal at rated load
Displacement Power Factor (cosφ) near unity (>0.98)
Switching on input supply L1/L, L2, L3/N (power-ups) maximum 2 times/min.
Environment according to EN60664-1 overvoltage category III/pollution degree 2
The unit is suitable for use on a circuit capable of delivering not more than 100.000 RMS symmetrical Amperes, 240/480 V
maximum.
Motor output (U, V, W)
Output voltage 0-100% of supply voltage
Output frequency 0-200 Hz (VVC
plus
), 0-400 Hz (u/f)
Switching on output Unlimited
Ramp times 0.05-3600 s
Cable lengths and cross sections
Max. motor cable length, screened/armoured (EMC correct installation) 15 m
Max. motor cable length, unscreened/unarmoured 50 m
Max. cross section to motor, mains*
Connection to load sharing/brake (M1, M2, M3) 6.3 mm insulated Faston Plugs
Max. cross section to load sharing/brake (M4, M5) 16 mm
2
/6 AWG
Maximum cross section to control terminals, rigid wire 1.5 mm
2
/16 AWG (2x0.75 mm
2
)
Maximum cross section to control terminals, flexible cable 1 mm
2
/18 AWG
Maximum cross section to control terminals, cable with enclosed core 0.5 mm
2
/20 AWG
Minimum cross section to control terminals 0.25 mm
2
* See 9 Specifications for more information!
Digital inputs (pulse/encoder inputs)
Programmable digital inputs (pulse/encoder) 5 (1)
Terminal number 18, 19, 27, 29, 33,
Logic PNP or NPN
Voltage level 0-24 V DC
Voltage level, logic'0' PNP <5 V DC
Voltage level, logic'1' PNP >10 V DC
Voltage level, logic '0' NPN >19 V DC
Voltage level, logic '1' NPN <14 V DC
Maximum voltage on input 28 V DC
Input resistance, R
i
approx. 4 kΩ
Max. pulse frequency at terminal 33 5000 Hz
Min. pulse frequency at terminal 33 20 Hz
Specifications
VLT
®
Micro Drive FC 51 Design Guide
MG02K202 - VLT
®
is a registered Danfoss trademark
91
9 9
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Danfoss VLT Micro Drive FC 51 Specifications

General

Enclosure	IP20
Output Voltage	0-100% of supply voltage
Altitude	Up to 1000 m without derating
Power Range	0.18-22 kW
Control Method	V/f
Communication	Modbus RTU
Protection Features	Over-voltage, under-voltage, over-current, over-temperature
Ambient Temperature	-10°C to 50°C
Storage Temperature	-25°C to 65°C
Relative Humidity	5-95% (non-condensing)
Input Voltage	200-240 V, 380-480 V
Braking Function	Integrated braking chopper (optional)