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1.4 - Environmental characteristics
Characteristics
Index of protection
Storage temperature
Transport temperature
Operating temperature
Altitude
Ambient humidity
Humidity during storage
Vibration
Shocks
Immunity
Radiated and conducted
emissions
UL standards
*For single-phase VARMECA models: for a maximum of 12 months; any longer than this and the drive must be switched on for
24 hours every 6 months. If the drive is not used for prolonged periods of time, the capacitors will need to be reformed.
1.5 - Radio-frequency interference
1.5.1 - General
Variable speed drives use high-speed switches (transistors,
semi-conductors) which switch high voltages (around 550VDC
for 3-phase drives) at high frequencies (several kHz). This
provides better efficiency and a low level of motor noise.
As a result, they generate radio-frequency signals which may
disturb operation of other equipment or distort measurements
taken by sensors:
- due to high-frequency leakage currents which escape to
earth via the stray capacity of the drive/motor cable and that of
the motor via the metal structures which support the motor.
Installation and maintenance - VARMECA 30
3776 en - 2017.10 / n
GENERAL INFORMATION
IP 65 (if motor IP 65)
- 40 °C to + 70 °C Conforming to standard IEC 68-2-1*
- 40 °C to + 70 °C
- 20 °C to + 50 °C (with power derated by 1% per °C, above 40 °C)
< 1000 m without derating.
The maximum authorised altitude is 4000 m, but above 1000 m, the continuous output current
should be derated by 1% per additional 100 m over 1000 m (eg: for an altitude of 3000 m, derate
by 20%).
95% non condensing
93%, 40 °C, 4 days
- Exposed product: 0.01 g
/Hz 1 hr in accordance with standard IEC 68-2-34.
2
- Sinusoidal vibration:
• VMA 31/32 : 2-9 Hz 3,5 ms
• VMA 33/34 : 2-6 Hz 3,5 ms
in accordance with standard IEC 68-2-6.
Packaged product: 15 g, 6 ms, 500 times/direction in all 6 directions in accordance with
standard IEC 68-2-29.
Conforming to EN61000-6-2
Conforming to EN50081-2 with filter
Conforming to UL 508 C (E211799)
Level
- 9-100 Hz 10 ms
-2
-2
- 6-100 Hz 5 ms
-2
-2
- by conduction or feedback of R.F. signals on the power supply
cable: conducted emissions.
- by direct radiation near to the mains supply power cable or the
drive/motor cable: radiated emissions.
These phenomena are of direct interest to the user.
The frequency range concerned (radio frequency) does
not affect the energy distribution company.
Conformity of the drive is only assured when the
mechanical
and
electrical
described in this manual are adhered to.
installation
instructions
9
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