NIPPEN's Insulation Testers are used for direct reading of insulation resistance of electrical rotating machines, power distribution lines, communication cables, insulators , control and switching equipment etc. They are robust instruments, incorporating a built-in-hand driven generator and a solid-state circuit for a stabilized D.C. output.
They are robust instruments, incorporating a built-in-hand driven generator and a solid-state circuit for a stabilised D.C. output.
NIPPEN Insulation Testers meet the requirements of Indian Standard Specifications IS.2992-1987 for Insulation resistance measuring instruments.
These instruments are supplied in two types of cases:
(i) An injection moulded ABS plastic case, where the unique geometry of the cabinet makes it practically unbreakable due to accidental falls and bumps.
(ii) A sturdy and elegant Aluminium cast case with carrying handle which makes the instrument conveniently portable.
The tester has two sections and is dust free. The rotary magnet type generator runs smooth with minimum noise because of the excellent dynamic balance of rotating parts.
Note: Any other combination of ranges can also be made to specific requirements.
|Rotational Speed of Handle||160 rpm. and above|
|Response time||Less than 3 seconds when a resistance, the value of which corresponds to the central scale mark, |
is suddenly inserted between measuring terminals.
|Limits of error||The insulation resistance measurement is accurate to within ± 5% of the indicated value at the Scale mark of the rated resistance, in conformity with IS:2992-1987 stipulations.|
|Tolerance on Voltage||Within ± 10 of the rated voltage for scale mark of infinity & more than 90% of the rated voltage for the central scale marks.|
|Accuracy of Voltage||The testers are provided mainly to determine whether the equipment under test is live or not, and not for any accurate measurement work. However the accuracy is within ± 10% F.S.D.|
|Tilt influence||Less than 0.5mm deflection from the infinity scale mark, due to an inclination of 5 degrees from the horizontal.|
|Ambient temp. influence||The deviation in indication is less that ± 5% near the central scale mark for an |
ambient temperature change of 20 degrees from 27 Degree C.
|Influence of humidity||Within the rated accuracy, at relative humidity of up to 90%.|
|Insulation resistance||1) More than 25 Mohm between the electric circuits and case for rated voltage |
upto and including 250V.
2) More than 50 Mohm between the electric circuits and case for rated voltage above 250V.
|Dielectric strength||Withstands application of 2000 volts AC(rms) for 1 minute between the electric |
circuits & the case.
|Accessories||(supplied with instrument) : Test leads and instruction manual.|
(supplied optional at extra cost) : Carrying case.
|External dimensions||Size : 160 x 110 x 72 mm. Weight : 1.0 Kg. ABS Body (NITA)|
Size : 178 x 122 x 126 mm. Weight : 2.3 Kg. Metal Body (NITM)