Specification
T1689 Technical Manual Rev 07
DELTA Components (General Environment)
MV3000 Air Cooled DELTA
Page 22
2.2.2
Switching Frequency
The switching frequency is set by parameter P35.00 in the MV3000e controller (see MV3000e Software Manual
T1679). The range of possible switching frequencies is given in Table 2–2.
Default
Alternatives Available
Network Bridge (AEM only)
2.5 kHz
5 kHz
Machine Bridge
1.25 kHz
2.5 kHz, 5 kHz
Notes:
1.
2.
If one of the alternative switching frequencies is selected, it may be necessary to reduce the power rating
of the drive, particularly at higher ambient temperatures.
If the switching frequency of the network bridge is altered, the effects on the PWM filter must be
assessed. The change of PWM frequency will affect the power dissipation in the filter and will also affect
the emissions onto the electricity supply.
Table 2–2. – Switching Frequency
2.2.3
Temperature & Humidity
DELTA modules and associated components (including the controller) are intended to be installed in a local
ambient (inside the enclosure) with the following characteristics:
FUNCTION
SPECIFICATION
Environmental
Operating
Ambient air temperature range 0 to 40°C derate to 50°C (32 to 104°F derate to 122°F)
Note: If clean/dirty air is segregated, the control electronics can withstand 60°C
(140°F).
Relative humidity
5 to 95% (non-condensing)
Altitude
Normal operating altitude up to 1000m above sea level.
From 1000 m (3280 ft.) to a maximum of 2000 m (6551 ft.) derate by 7.3% per
1000 m (3280 ft.).
Cooling air
Pollution Degree 2 (IEC 60664-1, UL 840 and CSA C22.2 No. 0.2-93) i.e. clean, free
from dust, condensation and conductive or corrosive gases. If conductive pollution
or condensation are expected (Pollution Degree 3), the drive must be placed in an
enclosure which achieves Pollution Degree 2 by:
- excluding the conductive pollution e.g. by the use of filtered air;
- preventing condensation e.g. by use of anti-condensation heaters.
In extreme environments dual circuit heat exchangers are recommended.
The dirty air path can be exposed to unfiltered air that does not contain corrosive,
conductive or explosive dust or gases.
See Section 3.9.1. for requirements for the drive enclosure.
Atmospheric chemicals (max)
15 ppm H
2
S
25 ppm NO
2
25 ppm SO
2
Storage
Temperature range
-25°C to +55°C (-13°F to 131°F)
Relative humidity
5 to 95% non-condensing
Altitude
Up to 3000 m (9842 ft.) above sea level
Transport
Temperature range
-25°C to +70°C (-13°F to +158°F) – without coolant
Relative humidity
≤
95% (non-condensing)
Altitude
Will withstand air transport
Table 2–3. – Temperature & Humidity
