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PORTABLE ELECTRICAL MEASURING INSTRUMENTS

 

PORTABLE WATTMETER (Unity Power Factor)

The Principle of working is Electo-dynamometer type for Wattmeters. Portable dynamometer type single phase Single element Wattmeter housed in laminated wooden cabinet size 235 mm length x 200 mm width x 180 mm height, with detachable lid, black bakelite panel fitted with anti-parallax mirror scale, knife edge pointer, rubber footings, carrying handles, locking arrangements. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground chemically treated sturdy coiled phosphor bronze springs are used. A very efficient system of damping is employed. Zero adjuster is accessible from the front. Scale length 150 mm., class of accuracy +1% /+ 0.5% of F.S.D. as per IS:1248:1983. All terminals are insulated and brought out for easy connection. 
*Ranges refer to price list.

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PORTABLE WATTMETER (Low Power Factor 0.2)

Portable single phase single element dynamometer type Low Power Factor (0.2 pf ) Watt meter, details as above. Class of accuracy + 1.5% of F.S.D.
Range : 0-0.5/1 Amps, 0-50/100/200 Volts.
0-0.5/1 Amps, 0-75/150/300 Volts
0-0.5/1 Amps, 0-150/300/600 Volts
0-0.5/1 Amps, 0-125/250/500 Volts

Range : 0-1/2A or 0-2.5/5A or 0-5/10 Amps (select any one range as per requirement).
0-50/100/200 Volts or 0-75/150/300 Volts
or 0-150/300/600 Volts or 0-125/250/500 Volts (select range as per requirement).

Portable Electro-dynamometer type Voltmeter meant for measuring A.C. as well as D.C. Voltage, laboratory type for horizontal use, housed in laminated wooden cabinet size 235 mm length x 200 mm width x 180 mm height, with detachable lid, black bakelite panel fitted with anti-parallax mirror scale, knife edge pointer, rubber footings, carrying handles, locking arrangements. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground chemically treated sturdy coiled phosphor bronze springs are used. A very efficient system of damping is employed. Zero adjuster is accessible from the front. Scale length 150 mm., class of accuracy + 1% / + 0.5% of F.S.D.as per IS:1248:1983.
Available in Single, Dual & Triple Ranges. * Details refer to Price List.

Portable Electro-dynamometer type Ammeter meant for Measuring A.C. as well as D.C. Current, laboratory type for horizontal use. Other details as above. Scale length 150 mm., class of accuracy + 1% / + 0.5% of F.S.D. as per IS:1248:1983.
Available in Single, Dual & Triple Ranges. * Details refer to Price List.

PORTABLE SINGLE PHASE POWER FACTOR METER

Portable Electro-dynamometer type single phase single element Power Factor Meter laboratory type for horizontal use, housed in laminated wooden cabinet size 235 mm length x 200 mm width x 180 mm height, with detachable lid, black bakelite panel fitted with anti-parallax mirror scale, knife edge pointer, rubber footings, carrying handles, locking arrangements. The power Factor Meters are fitted with an iron shielded Electro-dynamometer type cross coil system. The pointer has no definite position, if no current is flowing in the coil, as it is not spring controlled. It has no zero corrector. The zero corrector provide on the front panel is only dummy. The scale available for Power Factor Meters is 0.5-1-1.5 (Lag-Unity lead). Scale other than this can be supplied as per customers requirements. The instruments are calibrated at ratio current and voltage and compared against certified phase shifting Circuit and meter. Scale length 150 mm., class accuracy 2 degree as per IS:1248:1983.
* Ranges refer to Price List.

Portable Three phase laboratory type Power Factor Meters, specification same as single phase power factor meters.

a) Three Phase single element Power Factor Meters for balanced loads, cabinet size 235 mm length x 200 mm width x 180 mm height. Standard range current range 0-5A or 0-1A Potential range 440 Volts. b) Three phase three wire, two element for balanced and unbalanced loads, cabinet size 235 mm length x 200 mm width x 200 mm height, standard ranges- current range 0-0.5/1A or 0-1/2A or 0-2.5/5A or 0-5/10A 0r 0-10/20A and potential ranges 0-62.5/125V 0r 0-125/250V or 0-250/500V. c) Three phase four wire, three element for balanced and unbalanced loads, cabinet size 235 mm length x 200 mm width x 200 mm height, standard Ranges - current range 1A or 2.5A or 5A or 10A, and potential range 125V or 500V or 110V or 440V.

Panel Meters Electro-dynamometer type, single and three phase Wattmeters/KW/Meters MW Meters/ KVAR Meters/ MVAR Meters /Power Factors Meters, available in 96 x 96 mm square and 144 mm x 144 mm square types. Class of accuracy +1.5% of F.S.D. as per IS:1248:1983

a) Single Phase Wattmeters, one current range from 0.5A to 40 Amps and one potential range from 50 Volts to 600 Volts. b) Three phase three wire, two element meters current range 1A or 5A, and Voltage 110V or 440V. c) Three phase 4 wire 3 element meters current range 1A or 5A, and Voltage 110V or 440Volts.

Note: Any other ranges other than above can be supplied against specific requirement.

Three Phase wattmeters /KW Meters/MW Meters are portable housed in laminated wooden cabinet with detachable lid, black bakelite panel fitted with anti-parallax mirror scale, knife edge pointer, rubber footings, locking arrangements. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the system from shock and reduce friction to a minimum. Hardened and precisely ground pivotes and chemically treated sturdy coiled phosphor bronze springs are used. A very efficient system of damping is employed. Zero adjuster is accessible from the front. Scale length 150 mm., class of accuracy +1.5% of F.S.D. as per IS:1248:1983
a) Three Phase, 3 wire, 2 element for balanced load size of cabinet 235 mm length x 200 mm width x 200 mm height. Standard ranges current ranges 0-0.5/1A or 0-1/2A or 0-2.5/5A or 0-5/10A or 0-10/20A and potential range 0-125/250 Volts or 0-110/440 Volts or 0-250/500 Volts. 
b) Three Phase 4 Wire, 3 element for balanced and Unbalanced loads, cabinet size 235 mm length x 200 mm Width x 220mm height. Standard range current ranges 0-0.5/1A or 0-1/2A or 0-2.5/5A or 0-5/10A 0r 0-10/20A, potential ranges 110V or 125V or 250V or 440V or 500V.

KVAR/MVAR Portable laboratory type instruments are used for measuring the wattless components of KVA in three phase system. The Principle in working is Elecro-dynamometer as in the case of Wattmeters/KW Meters. The system comprises of two elements. Each element consists of a pair of fixed coils which carry the series resistances are connected in star and the star point must be solidly connected to neutral for correct working of the same as per our three phase KW Meters. Class of accuracy + 1.5% of F.S.D. as per IS 1248:1983 and size of cabinet 235 mm length x 200 mm width x 200 mm height.
a) Three Phase, 3 wire, 2 element, Standard ranges current ranges 0-0.5/1A or 0-1/2A or 0-2.5/5A or 0-5/10A     or 0-10/20A and potential range 0-125/250V or 110/440 V or 125V or 250 V or 0-250/500 V
b) Three Phase 4 Wire, 3 element for balanced and Unbalanced loads, cabinet size 235 mm length x 200 mm 
    width x 220 mm height. 
Standard ranges : current range 0-0.5/1A or 0-1/2A or 0-2.5/5A or 0-5/10A 0r 0-10/20A, potential range 110V or 125V or 250V or 440V or 500V.

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