Description

“NTPL” MAKE 60KV MOTORISED OIL BDV TEST SET TYPE: OTMT060S

TECHNICAL FEATURES:

Input                :           230V + 10%, 50Hz, 1 phase AC.

Output             :           Continuously variable from 0 to 60KV AC with center point of HV winding grounded.

Capacity          :           600VA max.

Duty                 :           Intermittent 

 

GENERAL ARRANGEMENT:

The Set will be consisting of the following:

HT Transformer, Control circuit, Test Cell with electrode, gauge and supply input cable of at least 2 meters length with 3 pin plug. The Set will be in single unit. Instruction manual and Test report will be supplied along with the Set.

 

HV TRANSFORMER:

High Voltage Transformer used in the Test Set will be of cast resin type. The HV winding of the transformer is of graded insulation with center point of HV winding grounded. This testing transformer is specially designed to withstand frequent intermittent sparkover or momentary short circuit conditions under which such testing transformer is supposed to operate.

 

THE CONTROL CIRCUIT WILL BE CONSISTING OF THE FOLLOWING:

• Power Mains ON – OFF operation is done by means of an ON – OFF switch along with ‘MAINS ON’ lamp indication & Fuse.
• HT’ ON – OFF push buttons along with ‘HT ON’ lamp indication.
• Lamp to indicate ‘Regulator not at zero’.
• Continuously variable autotransformer of suitable capacity to increase/decrease the output test voltage up to the required voltage level.
• Increase/Decrease circuit to control motor operated Voltage Regulator. When high voltage circuit is switched ON the regulator will rotate to increase the output voltage when INCREASE/DECREASE switch is kept in ‘INCREASE’ position and ‘INCREASE’ push is pressed ON or decrease the output voltage when the ‘INCREASE/ DECREASE’ switch is kept in ‘decrease’
• Memory device enables the test set meter to show the breakdown voltage by pressing the ‘MEMORY’ push even after the high voltage circuit is tripped OFF.

 

METERING:

Analog/Digital voltmeter to measure the output voltage. 

PROTECTION AND INTERLOCKS:

• Zero start interlocking will be provided to ensure that the HV circuit cannot be energised unless the regulating transformer is at zero position or brought back to zero position.
• Door interlocking (HV chamber interlocking) will be provided to ensure that the HV circuit cannot be energised unless the transparent cover of the oil cell placement chamber is closed.
• Beside main switch and fuse in the input side, one CT and contactor provides a snap acting automatic tripping of HV circuit in case of overload or breakdown of oil sample under test. Quick acting D.C relay to isolate the H.T will be provided.
• In case the output voltage crosses the maximum rated value a lamp & a buzzer will indicate over voltage and the increase mode circuit will not function further, even if ‘PRESS TO INCREASE’ push is pressed.

 

MODE OF OPERATION:

Output voltage variation: By means of motor driven arrangement of voltage regulator.

Approx. Rate of rise of output voltage 2KV/sec.
 

TEST SET HOUSING:

The Set will be in single unit. All the components will be housed within MS cabinet provided with wheels and handles for easy movement. A transparent cutout with suitable interlocking device will be provided for covering the HT end. The Set cannot be energised unless this HT end is covered. The oil cell is to be placed between the HV terminals.

 

TEST VESSEL (Test cup):

The Test Vessel (Oil Cell) with top cover is fitted with two brass electrodes spherical head of diameter between 12.5 to 13mm, placed at a distance of 4mm or 2.5mm. The test vessel is made from non-absorbent insulating material, Methyle Mathacrylate (Acrylic) having oil between 300 and 500 ml. Gap of the spheres can be adjusted by adjusting one sphere while the other being fixed.

 

FEATURES THAT CAN BE PROVIDED AT EXTRA COST:

• Tripping Set other than standard setting.
• Stirring arrangement.
• Timer
• Mushroom / Cylindrical Electrode.

 

ACCESSORIES:

• Mains 3 pin cord 2 meter long.
• Test cell with Electrodes.
• GO & NO GO Gauges

 

DOCUMENTS:

Operation Manual, Works Test Report, Warrantee Certificate will be supplied along with the set.

 

Approx Dimension in mm :

Length=  590mm                   Width=     400mm                 Height= 490mm

Note: The look, dimension & weight of the Test Unit may vary at the time of manufacture due to design innovation.