Report
of devices testing with the purpose of its
efficiency and energy saving evaluation
Equipment used for tests
1. Motor with reductor (Y/D connection)
depending on scheme.
For maximum load creation variable
speed gear was set to 270 rev/min
SIEMENS 1LA7090-4AA11,
50 Hz 230/400V
1,1 kW 4,4/2,55 A
Cos -0.81 1415 rev/min
MOTOVARIO TXF/010
s/n 9052652
n2 950-270 rev/min
2. Protection circuit
GE
SFKOJ 6.3-
3. Measuring device for energy measure
CIRCUTOR CVM-NRG96-ITF-RS485-C
s/n 39881000415.
Tested devices
1. Softstarter ASTAT PLUS - QC1F-DP made by GE.
2. Frequency invertor VAT-3 FDv - UAVX035LS
s/n 8G3430A 2
3. Frequency invertor VAT20
U20X2K2S
s/n (21)63380820172300040300
4. Frequency invertor SIEMENS MicroMaster
Vector.
5. Frequency invertor DANFOSS VLT2800 – VLT2815PT4B20STR1DBF00A00
P/N 195N1039
, s/n 106025G185.
6. Softstarter ASTAT SD - QS1D-NA made by GE.
7. Frequency invertor OMRON
V1000;
Type: VZAB1P5BAA
Model: CIMR-VZBA0010BAA REV:A
s/n J0072C136810081.
8. Frequency invertor MITSUBISHI F700
Type: FR-F740-00083-EC
s/.n C76K32002.
9. Frequency invertor EMERSON
COMMANDER SK - 1.5 kW
Type: SKB3400150 1.5 kW
s/n 2080100089 made by CONTROL TECHNIQUES.
10. Frequency invertor EMERSON
COMMANDER SK - 1.1 kW
Type: SKBD200100 1.1 kW
s/n 2080403079 made by CONTROL TECHNIQUES.
11. Frequency invertor VAT2000
Made by GE
Type: U2KX02K2S
The method ot test
A test stand was created for all
abovementioned equipment testing. All devices were tested during 1 day each
with constant frequency 50Hz. Phase sequence and motor load remained constant.
Test 1
Direct
start
Motor is connected directly with
circuit
Scheme:
380v
|
Nr |
Date |
Indication of CIRCUTOR (kWt/h) |
|
1 |
08 Apr 2008 12:50 |
0 |
|
2 |
09 Apr 2008 12:50 |
29.761 |
|
3 |
|
|
Consumption per day – 29.761 kWt/h
Consumption per hour -
1.24 kWt/h
Test 2
Softstarters
and invertors
The motor was connected with
following devices:
1. ASTAT PLUS in energy saving mode
2. VAT – 3 FDv
3. VAT-20
4. VAT2000
5. DANFOSS VLT2800
6.
7. MITSUBISHI F700
8. EMERSON COMMANDER SK - 1.5 kW
ASTAT PLUS
|
Nr |
Date |
Idication of CIRCUTOR (kWt/h) |
|
1 |
09 Apr 2008 13:00 |
0 |
|
2 |
10 Apr 2008 13:00 |
22.125 |
|
3 |
|
|
Consumption per day – 22.125 kWt/h
Consumption per hour -
0.922 kWt/h
ASTAT SD
|
Nr |
Date |
Indication of CIRCUTOR (kWt/h) |
|
1 |
17 Apr 2008 00:45 |
0 |
|
2 |
18 Apr 2008 00:45 |
21.6 |
|
3 |
|
|
Consumption per day – 21.6 kWt/h
Consumption per hour - 0.900 kWt/h
VAT – 3FDv
|
Nr |
Date |
Indication of CIRCUTOR (kWt/h) |
|
1 |
10 Apr 2008 13:05 |
0 |
|
2 |
11 Apr 2008 13:05 |
6.779 |
|
3 |
|
|
Consumption per day – 6.779 kWt/h
Consumption per hour -
0.282 kWt/h
VAT - 20
|
Nr |
Date |
Indication of CIRCUTOR (kWt/h) |
|
1 |
15 Apr 2008 00:15 |
0 |
|
2 |
16 Apr 2008 00:15 |
2.752 |
|
3 |
|
|
Consumption per day – 2.752 kWt/h
Consumption per hour - 0.115 kWt/h
DANFOSS VLT2800
|
Nr
|
Date |
Indication of CIRCUTOR (kWt/h) |
|
1 |
16 Apr 2008 00:30 |
0 |
|
2 |
17 Apr 2008 00:30 |
6.631 |
|
3 |
|
|
Consumption per day – 6.631 kWt/h
Consumption per hour -
0.2763 kWt/h
MITSUBISHI
F700
|
Nr |
Date |
Indication of CIRCUTOR (kWt/h) |
|
1 |
29 Apr 2008 11:15 |
0 |
|
2 |
30 Apr 2008 11:15 |
4.968 |
|
3 |
|
|
Consumption per day – 4.968 kWt/h
Consumption per hour -
0.207 kWt/h
EMERSON COMMANDER SK – 1.5 kW
|
Nr |
Date |
Indication of CIRCUTOR (kWt/÷àñ) |
|
1 |
30 june 2008 13:00 |
0 |
|
2 |
01 july 2008 13:00 |
10.07 |
Consumption per day – 10.07 kWt/h
Consumption per hour - 0.4196
kWt/h
|
N ï/ï |
Date |
Indication of CIRCUTOR (kWt/÷àñ) |
|
1 |
11 septembri 2008 8:50 |
0 |
|
2 |
12 septembri 2008 8:50 13 septembri 2008 8:50 |
8.781 (The power savings mode is switched off) 8.04 (The power savings mode is switched on) |
Consumption per day - 8.781 kWt/h
Consumption per hour - 0.367 kWt/
Test 3
Invertors
The motor was connected with
following devices:
1. Frequency invertor SIEMENS
MicroMaster
2. Frequency invertor OMRON V1000
3. Frequency invertor EMERSON COMMANDER SK - 1.1 kW
SIEMENS MicroMaster
|
Nr |
Date |
Indications of CIRCUTOR (kWt/h) |
|
1 |
15 Apr 2008 00:15 |
0 |
|
2 |
16 Apr 2008 00:15 |
3.3 |
|
3 |
|
|
Consumption per day – 3.3 kWt/h
Consumption per hour - 0.1375
kWt/h
OMRON V1000
|
Nr |
Date |
Indications of CIRCUTOR (kWt/h) |
|
1 |
28 Apr 2008 11:00 |
0 |
|
2 |
29 Apr 2008 11:00 |
3.104 |
|
3 |
|
|
Consumption per day – 3.104 kWt/h
Consumption per hour - 0.129
kWt/h
EMERSON COMMANDER SK – 1.1 kWt.
|
N ï/ï |
Äàòà |
Ïîêàçàíèÿ CIRCUTOR (kWt/÷àñ) |
|
1 |
01 july 2008
14:00 |
0 |
|
2 |
02 july 2008 14:00 |
|
|
3 |
|
|
Ñóòî÷íîå ïîòðåáëåíèå – 7.11 kWt/h
×àñîâîå ïîòðåáëåíèå - 0.296
kWt/h
Result table
|
Nr |
Place in competition |
Device |
Energy consumption kWt/h |
Energy consumption (%) |
Energy saving (%) |
|
1 |
1 |
VAT 20 |
2.752 |
9.247 |
90.75 |
|
2 |
2 |
|
3.104 |
10.43 |
89.57 |
|
3 |
3 |
SIEMENS
MicroMaster |
3.30 |
11.09 |
88.91 |
|
4 |
4 |
MITSUBISHI
F700 |
4.968 |
16.69 |
83.81 |
|
5 |
5 |
DANFOSS
VLT2800 |
6.631 |
22.28 |
77.72 |
|
6 |
6 |
VAT - 3FDv |
6.779 |
22.77 |
77.23 |
|
7 |
7 |
VAT2000 |
7.087 |
23.81 |
76.19 |
|
8 |
8 |
|
7.11 |
23.89 |
76.11 |
|
9 |
9 |
OMRON
G7 |
8.04 |
27.02 |
72.98 |
|
10 |
10 |
EMERSON
COMMANDER SK - 1.5 kWt |
10.07 |
33.84 |
66.16 |
|
11 |
11 |
ASTAT SD |
21.6 |
72.58 |
27.42 |
|
11 |
12 |
ASTAT CD |
22.125 |
74.34 |
25.66 |
|
13 |
13 |
Direct Start |
29.761 |
100 |
0 |
Conclusions
According to the
test the following conclusions could be made:
Frequency invertors and
softstarters are highly effective devices for motor control.
Also it have their own advantages
and disadvantages
Invertors
Pro (+):
- smooth rotation speed change
- high energy saving efficiency
-
built-in programming and control functions for different modes
- soft start of motors
- multi motor application (up to 5)
- autotuning
of consumpted power according to applied load
- always
optimal mode of motor work
- partial reactive power compensation
Contra (-):
-
high price (approx 1 kW = 250 USD)
- shielded cable required
- generation of electromagnetic interference
- additional filters required
- generation of reactive power, cos Ô reduction, that causes active and reactive power disbalance
- regular technical service needed
-
special knowledge of programming and tuning required
Softstarters
Pro (+):
- soft start of motors
-
reduction of start currents
-
energy saving
-
relatively low price (approx 1 kW = 100 USD )
- long maintenance-free period
-
normal cable and installation materials
-
simplicity in installation and programming
-
do not influence on reactive power and
-
autotuning of consumpted power according to applied load
-
almost optimal mode of motor work
Contra (-):
-
no possible regulate rotation speed
-
energy saving lower than invertors have
-
additional equipment for inserting of control circuit needed