Portable Instrument 1Ph And 3Ph Power Factor Meter (Large Size Dynamometric In Wodden Housing)

DESCRIPTION

Protable dynamometric types instruments, incorporating single element / two elements or three elements power measurement methods and specially designed to be operated in horizontal position.

 

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
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.