| Portable
Instrument 1ph / 3ph - Power & Power Factor Meter (Large Size Dynamometric in Wooden housing) |
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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 | |
| • | Instruments with accuracy class 0.5 for 1 Ph Watt, 1.5 for 3Ph, 2° for PF. |
| • | Instruments with multiple scale available (refer table). |
| • | 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 : | |
| • | All Wattmeters are calibrated at cos¢ = 1 and Varmeter at sin¢ = 1 |
| • | All Low Power Factor Wattmeters are calibrated at cos¢ = 0.2 lag. |
| • | 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.) |
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| LENGHT mm (Approx.) |
DIVISIONS |
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| 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. |