8.2 General Specifications
Protection and features
•
Electronic thermal compressor protection against overload.
•
Temperature monitoring of the heat sink ensures that the frequency converter trips if there is overtemperature.
•
The frequency converter is protected against short circuits between compressor terminals U, V, W.
•
When a compressor phase is missing, the frequency converter trips and issues an alarm.
•
When a mains phase is missing, the frequency converter trips or issues a warning (depending on the load).
•
Monitoring of the DC-link voltage ensures that the frequency converter trips, when the DC-link voltage is too low
or too high.
•
The frequency converter is protected against ground faults on compressor terminals U, V, W.
Mains 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 mains 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/minute
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, screened/armoured (EMC-correct installation)
See
chapter 2.7.3 EMC Test Results
Maximum compressor cable length, unscreened/unarmoured
50 m (164 ft)
Maximum cross-section to compressor, mains
1)
Cross-section DC terminals for filter feedback on enclosure sizes H1–H3, I2, I3, I4
4 mm
2
/11 AWG
Cross-section DC terminals for filter feedback on enclosure sizes 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 8.1.2 Mains Supply 3x380–480 V AC for more information.
General Specifications
Design Guide
MG18N202
Danfoss A/S © 12/2015 All rights reserved.
71
8
8
