Contact Resistance Meter

Approx. Rs 1,20,000 / PieceGet Latest Price

Product Details:

The contact or winding resistance is measured on the principle of voltage drop. A specific DC current is passed through the equipment under test, indicated by the ammeter and the potential drop across the contact / winding is measured by the millivoltmeter. The resistance is obtained by dividing the mV drop by the current. The instrument comprises of a variac, a loading transformer, a rectifier, the ammeter and the milli-voltmeter alongwith necessary terminals and switches, housed in an insulated moulded cabinet.

Specifications:

• 0.1 micro: 19.999 milli-ohms at 100 A
• 1 micro: 199.99 milliohms at 10 A
• Input: 230 V, 1 Phase, 50 Hz.
• Outputs: 0-100 A DC OR 0-10/20 A DC, continuously variable. (Two current outputs)

Metering:

• 4 ½ Digit Millivoltmeter, Range: 0-19.999 mV DC
• 3 ½ digit Ammeter, Ranges : 0-100 A DC.
• Display: LED with HOLD facility
• Housing: VIP/ALFA suitcase.
• Weight: 25 kgs. Approx

Accessories:

• AC mains connecting lead, 3 meter long.
• Pair of connecting leads suitable to carry 100 A, 10 meter long.
• Pair of connecting leads to measure voltage drop, 10 mtr. long.

Note:

• Equipment may be supplied with specification differing from that described above due to continuous development in the electrical and mechanical design

Approx. Rs 1,20,000 / PieceGet Latest Price

Product Details:

The winding resistance is measured on the principle of voltage drop. A specific DC current is passed through the equipment under test, the potential drop across the circuit is measured by the “millivoltmeter” which is directly indicated in micro-ohms.  The instrument comprises of a constant voltage/current DC source having capacity of 300 VA/10A, an ammeter to indicate the current and “milli-voltmeter” calibrated in micro/milli-ohms for measurements, along-with the necessary terminals and switches, housed in an aluminium cabinet.
The unit will display the Resistance of the winding as well as the CURRENT flowing in the circuit. The protection against back EMF of the transformer has been provided. On switching OFF the “Output” switch or break in the current circuit, the discharge circuit will automatically come into operation. The discharging will be indicated by a glowing LED. The flow of current during testing is indicated by the continuous sound of the buzzer. Discontinuity in the OLTC or the current circuit will be indicated directly by an LED which starts glowing and the stoppage of buzzer.

Technical Specifications: 

• Input: 240 V, 1 Phase, 50 Hz. 
• Resistance Ranges : 0-1.9999/19.999/199.99/1999.9 milliohms at 10 A  (x1)  0-2.9998/29.998/299.98/2999.8 milliohms at  5 A,(x2) 0-19.999/199.99/1999.9/19999  milliohms at  1 A,  (x10), 0-0.19999/1.9999/19.999/199.9 ohms at 100 mA.  (x100)
• Current Ranges: 100 mA, 1 A, 5 A & 10 A DC. (Selectable)

Metering: 

• 4 ½  Digit meter, having ranges of 0-1.9999 milli-ohm to 1999.9 milli-ohms in 4 selectable ranges.
• 3 ½ Digit ammeter, having ranges of  100.0 mA and 10.00 A
• Resolution: 0.1 micro-ohm to 0.01 ohm.
• Accuracy: Value + 2% + Resolution + 2 digits. 
• Display: 4.5 digit LED. 
• Output: 30 V DC maximum.
• Protection: Fuse protection on input. Back emf protection on measuring inputs.
• OLTC Testing: Detection of discontinuity in current circuit by indicator.
• Housing: Moulded VIP suitcase (18”) for easy portability.
• Dimensions: 450 x 325 x 160 mms. Approx
• Weight: 10 kgs. Approx. (Instrument only)

Accessories:

• AC mains connecting lead, 3 meter long.
• Current lead, 2-core, 15 meter long.                                                                                  
• Potential lead, 3-core, 15 meter long. 
• An earth lead, 10 meter long.

Note:

• Equipment may be supplied with specification differing from that described above due to continuous development in the electrical and mechanical design