1.7.4 General Specifications
Protection and features
•
Electronic thermal compressor protection against overload.
•
Temperature monitoring of the heatsink ensures that the adjustable frequency drive trips in case of overtem-
perature.
•
The adjustable frequency drive is protected against short circuits between compressor terminals U, V, W.
•
When a compressor phase is missing, the adjustable frequency drive trips and issues an alarm.
•
When a line phase is missing, the adjustable frequency drive trips or issues a warning (depending on the load).
•
Monitoring of the intermediate circuit voltage ensures that the adjustable frequency drive trips when the
intermediate circuit voltage is too low or too high.
•
The adjustable frequency drive is protected against ground faults on compressor terminals U, V, W.
Line power supply (L1, L2, L3)
Supply voltage
200–240 V
±
10 %
Supply voltage
380–480 V
±
10 %
Supply frequency
50/60 Hz
Maximum imbalance temporary between line power phases
3.0% of rated supply voltage
True power factor (
λ
)
≥
0.9 nominal at rated load
Displacement power factor (cos
φ
) near unity
(>0.98)
Switching on the input supply L1, L2, L3 (power-ups)
Maximum 2 times/min.
Environment according to EN 60664-1
Overvoltage category III/pollution degree 2
The unit is suitable for use on a circuit capable of delivering not more than 100000 RMS symmetrical Amperes, 240/480 V
maximum.
Compressor output (U, V, W)
Output voltage
0–100 % of supply voltage
Output frequency
0–200 Hz (VVC
+
), 0–400 Hz (u/f)
Switching on output
Unlimited
Ramp times
0.05–3600 s
Cable lengths and cross-sections
Maximum compressor cable length, shielded/armored (EMC- compatible installation)
See
chapter 1.7.3 EMC Test Results
Maximum compressor cable length, unshielded/unarmored
164 ft [50 m]
Maximum cross-section to compressor, line power
1)
Cross-section DC terminals for filter feedback on enclosure size H1-H3, I2, I3, I4
4 mm
2
/11 AWG
Cross-section DC terminals for filter feedback on enclosure size H4-H5
16 mm
2
/6 AWG
Maximum cross-section to control terminals, rigid wire
2.5 mm
2
/14 AWG)
Maximum cross-section to control terminals, flexible cable
2.5 mm
2
/14 AWG)
Minimum cross-section to control terminals
0.05 mm
2
/30 AWG
1) See chapter 1.7.2 Line Power Supply 3x380–480 V AC for more information
Quick Guide
Quick Guide
28
Danfoss A/S © Rev. 08/2014 All rights reserved.
MG18M122
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