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268
Unidrive SPM User Guide
www.controltechniques.com Issue Number: 3
The IP rating of a product is a measure of protection against ingress and
contact to foreign bodies and water. It is stated as IP XX, where the two
digits (XX) indicate the degree of protection provided as shown in Table
14-14.
Table 14-14 IP Rating degrees of protection
Table 14-15 NEMA enclosure ratings
14.1.11 Corrosive gases
Concentrations of corrosive gases must not exceed the levels given in:
•
Table A2 of EN 50178
•
Class 3C2 of IEC 60721-3-3
This corresponds to the levels typical of urban areas with industrial
activities and/or heavy traffic, but not in the immediate neighborhood of
industrial sources with chemical emissions.
14.1.12 Vibration
Bump Test
Testing in each of three mutually perpendicular axes in turn.
Referenced standard: IEC 60068-2-29: Test Eb:
Severity:
10g, 6ms, half sine
No. of Bumps:
600 (100 in each direction of each axis)
Random Vibration Test
Testing in each of three mutually perpendicular axes in turn.
Referenced standard: IEC 60068-2-64: Test Fh:
Severity:
1.0 m²/s³ (0.01 g²/Hz) ASD from 5 - 20 Hz
-3 dB/octave from 20 to 200 Hz
Duration:
30 minutes in each of 3 mutually
perpendicular axes.
Sinusoidal Vibration Test
Testing in each of three mutually perpendicular axes in turn.
Referenced standard: IEC 60068-2-6: Test Fc:
Frequency range:
2 - 500 Hz
Severity:
3.5 mm peak displacement from 2 to 9 Hz
10 m/s² peak acceleration from 9 to 200 Hz
15 m/s² peak acceleration from 200 to
500 Hz
Sweep rate:
1 octave/minute
Duration:
15 minutes in each of 3 mutually
perpendicular axes.
14.1.13 Starts per hour
By electronic control: unlimited
By interrupting the AC supply:
≤
20 (equally spaced)
14.1.14 Start up time
This is the time taken from the moment of applying power to the drive, to
the drive being ready to run the motor:
All sizes:
4s
14.1.15 Output frequency / speed range
Open-loop frequency range: 0 to 3,000Hz
Closed-loop speed range: 0 to 40,000rpm
Closed-loop frequency range: 0 to 1,250Hz (Limit to 600Hz for good
performance)
14.1.16 Accuracy and resolution
Speed:
The absolute frequency and speed accuracy depends on the accuracy
of the crystal used with the drive microprocessor. The accuracy of the
crystal is 100ppm, and so the absolute frequency/speed accuracy is
100ppm (0.01%) of the reference, when a preset speed is used. If an
analog input is used the absolute accuracy is further limited by the
absolute accuracy of the analog input.
The following data applies to the drive only; it does not include the
performance of the source of the control signals.
Open loop resolution:
Preset frequency reference: 0.1Hz
Precision frequency reference: 0.001Hz
Closed loop resolution
Preset speed reference: 0.1rpm
Precision speed reference: 0.001rpm
Analog input 1: 16bit plus sign
Analog input 2: 10bit plus sign
Current:
The resolution of the current feedback is 10bit plus sign. The typical
accuracy of the current feedback is 5%.
14.1.17 Acoustic noise
The heatsink fan generates the majority of the acoustic noise produced
by the drive. The heatsink fan on Unidrive SPMA and SPMD is a
variable speed fan. The drive controls the speed at which the fan runs
based on the temperature of the heatsink and the drive's thermal model
system. The Unidrive SPMA and SPMD are also installed with variable
speed fan to ventilate the capacitor bank.
Table 14-16 gives the acoustic noise produced by the drive for the
heatsink fan running at the maximum and minimum speeds.
Table 14-16 Acoustic noise
First digit
Second digit
Protection against contact and
ingress of foreign bodies
Protection against ingress of water
0 No protection
0 No protection
1
Protection against large
foreign bodies
φ
> 50mm
(large area contact with the
hand)
1
Protection against vertically
falling drops of water
2
Protection against medium
size foreign bodies
φ
> 12mm
(finger)
2
Protection against spraywater
(up to 15
°
from the vertical)
3
Protection against small
foreign bodies
φ
> 2.5mm
(tools, wires)
3
Protection against spraywater
(up to 60
°
from the vertical)
4
Protection against granular
foreign bodies
φ
> 1mm (tools,
wires)
4
Protection against splashwater
(from all directions)
5
Protection against dust
deposit, complete protection
against accidental contact.
5
Protection against heavy
splash water (from all
directions, at high pressure)
6
Protection against dust
ingress, complete protection
against accidental contact.
6
Protection against deckwater
(e.g. in heavy seas)
7 -
7 Protection against immersion
8 -
8 Protection against submersion
NEMA rating
Description
Type 1
Enclosures are intended for indoor use, primarily
to provide a degree of protection against contact
with the enclosed equipment or locations where
unusual service conditions do not exist.
Type 12
Enclosures are intended for indoor use, primarily
to provide a degree of protection against dust,
falling dirt and dripping non-corrosive liquids.
Size
Maximum pressure level at 1m (dBA)
Max speed
Min speed
SPMA
72
43
SPMD12X1 to 12X4
SPMD14X1 to 14X2
SPMD16X1 to 16X2
SPMD14X3 to 14X4
SPMD16X3 to 16X4
75
SPMC/U
53