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| Portable Instrument 1Ph And 3Ph Power Meter (Large Size Dynamometric In Wodden Housing) |
| DESCRIPTION |
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Protable dynamometric types instruments, incorporating single element / two elements or three elements power measurement methods and specially designed to be operated in horizontal position.
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| FEATURES / ADVANTAGES |
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Instruments with accuracy class 0.5 for 1 Ph Watt, 1.5 for 3Ph, 2° for PF. |
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Instruments with multiple scale available (refer table). |
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Robust housing suitable for schools, workshops and field operations for continuous use. |
| ELECTRICAL SPECIFICATIONS |
| TYPE |
MODEL |
POTENTIAL COIL (A) |
CURRENT COIL (A) |
ACCURACY |
Watt Meter With
Low Power Factor |
PORT
LSDW-1 |
TPDC |
75/150/300,150/300/600 |
0.5/1,1/2,2.5/5,5/10,10/20 |
1.5% |
WATT METER |
PORT
LSDW-2 |
SPSC |
75,150,300,600 |
0.5,1,2,2.5,5,10,20 |
0.5% |
| DPSC |
75/150,150/300,300/600 |
| TPSC |
75/150/300,150/300/600 |
| SPDC |
75,150,300,600 |
0.5/1,1/2,2.5/5,5/10,10/20 |
| DPDC |
75/150,150/300,300/600 |
| TPDC |
75/150/300,150/300/600 |
PORT
LSDW-3 |
SPSC |
75,150,300,600 |
0.5,1,2,2.5,5,10,20 |
1.5% |
PORT
LSDW-4 |
SPSC |
75,150,300,600 |
0.5,1,2,2.5,5,10,20 |
| DPDC |
75/150,150/300,300/600 |
0.5/1,1/2,2.5/5,5/10,10/20 |
PORT
LSDW-5 |
SPSC |
75,150,300,600 |
0.5, 1, 2, 2.5, 5, 10, 20 |
| SPDC |
0.5/1,1/2,2.5/5,5/10,10/20 |
VAR METER |
PORT
LSDW-6 |
SPSC |
75,150,300,600 |
0.5,1,2,2.5,5,10,20 |
1.5% |
| DPDC |
75/150,150/300,300/600 |
0.5/1,1/2,2.5/5,5/10,10/20 |
PORT
LSDW-7 |
SPSC |
75,150,300,600 |
0.5, 1, 2, 2.5, 5, 10, 20 |
| SPDC |
0.5/1,1/2,2.5/5,5/10,10/20 |
POWER
FACTOR
METER |
PORT
LSDW-8 |
SPSC |
75,150,300,600 |
0.5,1,2,2.5,5,10,20 |
2° |
| DPSC |
75/150,150/300,300/600 |
| TPSC |
75/150/300,150/300/600 |
| SPDC |
75,150,300,600 |
0.5/1,1/2,2.5/5,5/10,10/20 |
| DPDC |
75/150,150/300,300/600 |
| TPDC |
75/150/300,150/300/600 |
PORT
LSDW-9 |
SPSC |
75,150,300,600 |
0.5,1,2,2.5,5,10,20 |
| SELECTION OF RANGES |
| Upper limit of measuring range for meters shall be one of the following values - |
| 1, 1.2, 1.5, 2, 2.5, 3, 4, 5, 6, 7.5, 8 or their decimal multiples. |
| Example for selection of proper range |
| 1 ) Formula for 1 Phase active power |
| P(max) = VI COS¢ Where COS¢ = 1. |
| If Voltage = 500V & Current = 2.5A calculated power = 500 x 2.5 x 1 = 1.25kW. |
| If the calculated value is 1.25kW 0 - 1.2kW or 0 - 1.25kW shall be selected as a range for power. |
| 2) Formula for 3 Phase active power with PT & CT. |
| P(max) = √ 3VI COS¢ x PTR x CTR Where COS ¢ = 1. |
| If Voltage = 110V & Current = 5A PTR = 400kV/110V CTR = 1000A/5A |
| calculated power = √ 3 x 110x5 x (400x1000/110) x (1000/5)= 692MW. |
| If the calculated value is 692MW 0 - 600MW or 0 - 750MW shall be selected as a range for power. |
| Note : |
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All Wattmeters are calibrated at cos¢ = 1 and Varmeter at sin¢ = 1 |
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All Low Power Factor Wattmeters are calibrated at cos¢ = 0.2 lag. |
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Voltage & Current range other than specified can be supplied on request, if feasible. |
| Mechanical Specifications |
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| Fig. 1 |
Fig. 2 |
| SIZE |
LENGTH
mm |
WIDTH
mm |
HEIGHT
mm |
HOUSING
MATERIAL |
MODEL
IDENTIFICATION |
SCALE |
WEIGHT
kg.
(Approx.) |
LENGHT
mm
(Approx.) |
DIVISIONS |
| 1 |
300 |
200 |
155/190 |
Wooden Box |
LSDW- |
150 |
100 ~ 150 |
4 ~ 5 |
| 2 |
225 |
355 |
190/225 |
Wooden Box |
LSDW- |
150 |
100 ~ 150 |
5.5 ~ 7.5 |
| Ordering information |
1) Type 2) Model 3) Parameter, Phase, Range 3) Operating Voltage & PTR
4) Operating Current & CTR. |
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