Ajit Electronics Corporation

Dombivali East, Dombivali East, Maharashtra

Features :

• Built in µc based Time Interval Meter measuring from1 millisec to 9999 sec.
• Panel with easy and clear legends to read.
• Continuosly variable outputs.
• Auto Cut-off & output isolated.
• Self sensing of contacts i.e. NO or NC
• Potential free star stop signals
• Available in Portable / Lab type models with metal cover

This instrument is capable of producing 3 Phase AC Voltage with phase shifting arrangement between the phases simultaneously.Voltage OutputRange : 0 to 415V ph-ph variable.Measurement : 3 Digit Digital voltmeter with selector switchPhase Angle Setting : With the help of selector switches and a variac.Angle Measurement : Switch positions and a digital meterIndications : LED indicators for input and outputProtection : Glass fuses in the input supply and output.Power Supply : Three Phase, 415V AC 50 Hz, 120 degree apartCabinet : Powder Coated sheet metal cabinet.

APPLICATIONS

• For High Voltage withstand, breakdown testing of electrical insulating systems.
• For Dielectric Strength testing of electrical / electronic components, small appliances, tools, motors, machines etc.

FEATURES

• Compact & Simple to Operate
• Zero Interlock for H.V. Output
• Analog or Digital read outs
• Adjustable, selectable leakage current.
• Audio visual indication for presence of high voltage
• Continuosly variable test voltage
• Highly sensitive electronics circuit for tripping
• Avaliabe in AC, DC as well as AC & DC Combined
• Outputs upto 100KV.
• Available with built - in printer and or /RS 232 interface.
• H.V. Test sets of other specifications as per requirement can be supplied.

AUTOMATIC VERSIONFollowing parameters can be set by 4x4 matrix keypadA) Output Test VoltageB) Leakage / Trip Current LimitC) Test Duration (Time)HV built in printer, with Rs232 interface & with both the feature are considered as Automatic version HV test set. In Automatic HV Test Set both types like with AC output & with DC output instruments are available.

SEMI AUTOMATIC VERSIONFollowing parameters can be set by push button with potentiometer / thumb wheel switch.A) Output Test VoltageB) Leakage / Trip Current LimitC) Test Duration (Time)

• Once above parameters set and the high voltage is started the instrument will automatically raise the voltage.
• On reaching of the test voltage, control circuit will start to command to timer. After completion of duration motor will come back.
• Object Test Fail Indication is given.

MOTOR GENERATOR UNITThis test setup is generally used to perform induced voltage test on the transformers. This set up consists of the USED motor and generator combination to develop the required voltage and frequency. Both generating unit and the drive motor are mounted on a common metallic frame.

GENERATING UNIT

• Input : 0 to 415 V three phase, 50 Hz through the dimmer unit.
• Output : 50 to 900 V three phase, 100 Hz.
• Capacity : Suitable to test the distribution transformers
• Transformers KVA ratings shall be specified by the customer.

The input and output are terminated on the suitable terminals on the unit.Make : KIRLOSKAR / CROMPTON / AEC / SIEMENS / NGEF (or eQUIVALENT)

DRIVING UNIT

• Input : 415 V three phase, 50 Hz through the dol /star delta starter.
• RPM : 1440 or any suitable speed (or eQUIVALENT)
• The input supply terminals are terminated on the suitable terminals on the unit.
• Make : KIRLOSKAR / CROMPTON / AEC / SIEMENS / NGEF (or eQUIVALENT)

AJIT Transformer Oil Set is completely self contained, compact & portable unit giving smooth variable output voltage from zero to 60/80/100KV for testing the dielectric strength of insulating oil.
The set has been specially designed for the testing the die electric breakdown Voltage of insulating liquids.

Features :

• Manual or Motorised Version.
• Highly Sensitive Electronics Circuit Breaker
• Heavy Duty H.V. Transformer (Epoxy Cast)
• Tried, Proven & Tested design.
• Zero Interlock for output.
• Door Micro s/w for operator’s safety.
• Digital or Analog KV Meters.

The oil cups are made of Acrylic & have removable electrodes for easy cleaning & polishing. The unique design of the lectrode holders eliminate oil leakages around shafts.

ACCESSORIES SUPPLIED WITH EACH SET :1. OIL CUP WITH ONE SET OF ELECTRODES.2. ONSE SET OF GO/NO-GO GAUGES3. ONE SET OF INSTRUCTION MANUAL.

SAFETYMaximum possible safety of the operator as well as the equipment is ensured by a safety conscious design. The voltage controller is inter locked at its minimum position so that H.V. can be switched ON only when the voltage controller is brought to zero after every test or interruption. The acrylic door leading to H.V. Terminals has a micro switch fitted so that opening of the acrylic door shuts the H.V. OFF.

APPLICATIONAJIT oil set is completely self contained, compact & portable unit giving smooth variable output voltage from zero to 60/80/100KV for testing the dielectric strength of insulating oil. The set has been specially designed for testing the dielectric breakdown Voltage of insulating liquids as per the directions mentioned in IS 6792.

OIL CELLThe oil cells are made of Acrylic & have removable electrodes for easy cleaning & polishing. The unique design of the electrode holders eliminate oil leakages around shafts.

ACCESSORIES SUPPLIED WITH EACH SET :

• One set of instruction manual
• Oil Cell with one set of electrodes
• One set of GO/NO-GO Gauges

AJIT Transformer Ratio Meters are the most modern turn’s radio meters widely used to test the turn’s ratio of high voltage windings, to low voltage windings, of Transformer. These meters are accurate, compact & light in weight.

APPLICATION :Transformer Ratio Meters / TRM 1000 are the most modern digital turn's ratio meters widely used to test the turn's ratio of high voltage windings to low voltage windings of any transformer. These meters are accurate, compact & light in weight.
We have with us a quality range of Transformer Ratio Meters / TRM 1000. These have 4 ½ digit direct read-out and are widely used to test the turn's ratio of high voltage windings to low voltage windings of any transformer.

SALIENT FEATURES :

• MDesign with latest Technology
• M41/2 Digit Direct read - out in Digital Type
• MCompact and light weight
• MFull range of measurement

Features :

• Potential -Free start and stop signal
• Continously adjustable outputs
• Portable Models
• Automatic Self Sensing of Contacts, i.e. NO /NC
• Digital ammeter, voltmeter and time interval meter (UniTimer)
• UniTimer automatically puts OFF the output, when timer reaches to its maximum value of the selected range to ensure safety of the instruments as well as the item under test. Wide range of measurement, i.e. from 1 millisecond.
• To 9999 secs In four ranges.

APPLICATIONSThe protective devices such as relays, overload coils, circuit breakers must be checked regularly to ensure that, they are always ready to operate correctly. If a fault occurs in the equipment, which they are protecting, routine relay testing will quickly detect the faulty, incorrectly adjusted protection circuits correctly. It is usually necessary to measure its operating time. The micro controller based time interval meter is used for this purpose in all AJIT brand relay testers.

Technical Specifications :Input Supply : 230V, AC, + 10% single phase.Metering : a) 3 ½ digit, ammeter / voltmeter b) micro controlled based time interval meterRange : 0-9.999 - 99.99 - 999.9-9999 sec selectable by a push button.Display : 4 digit LED Type.Protection : Fuse /MCB, Over current protection.

APPLICATION :This is a common test panel for distribution/ power transformers of different specifications. The user can perform most of the factory tests, as per the relevant IS standard for the transformers. The panel consists of power analyser, meters for high voltage test, meters for induced voltage test etc, control for all the tests, protection and interlock circuits so that a single panel can be used to conduct a number of tests using only one dimmerstat and the associated devices
FEATURES :

• A single measurement and control center.
• Simple & Easy to use.
• All digital & accurate meters.
• Electrically interlocked for safe operation.
• Wide range of transformers can be tested.

Following Tests can be conducted :

• Induced voltage test using DVDF motor generator setup, dimmer & common panel.
• High voltage test using HV transformer, dimmer & common panel.
• Open circuit and short circuit test using common panel, dimmerstat & intermediate transformer (if required & offered).
• Magnetic balance tests using dimmer & common panel.

MOTOR GENERTOR SET FOR DVDF :Motor Generator set made from the used and rewound motors fitted on a common metallic frame and coupled together.

Technical specifications :
Generating unit :

• Input : 0 to 415 V three phase, 50 Hz through the dimmer unit.
• Output : 50 to 900 V three phase, 100 Hz or 150 Hz as per customers specifications.
• Capacity : Suitable to test the distribution transformers. Transformers KVA ratings shall be specified by the customer.
• The input and output are terminated on the suitable terminals on the unit.
• Make : KIRLOSKAR / CROMPTON / AEC / SIEMENS / NGEF (or any other equivalent ).

Driving unit :

• Input : 415 V three phase, 50 Hz through a starter.
• RPM : 1440 or any other suitable speed.
• The input supply terminals are terminated on the suitable terminals on the unit.
• Make : KIRLOSKAR / CROMPTON / AEC / SIEMENS / NGEF (or any other equivalent).

VARIABLE 3 PH MOTORIZED AUTOTRANSFORMER (DIMMER-STAT) :
Technical specifications :

• Cooling type :- Air Cooled/ Oil Cooled Type.
• Input :- 415 V 3 phase, 50 Hz.
• Output :- 0 470 V 3 phase, 50 Hz, variable.
• Operation :- Motor driven for increase and decrease. The motor control push buttons will be in the common panel.
• Current capacity :- Selected depending upon the kVA rating of transformer under test.
• Termination :- Input, Signals, Motor wires & Output are terminated on insulated terminals with appropriate legend marking.
• The dimmer :- stat will have caster wheels to make it portable.
• Housing :- The dimmer-stat will be housed in powder coated sheet metal cabinet.

Features :

• Selectable four resistance ranges.
• 4 1/2 digits LED display
• High measurement Current (10A)
• True four Technique elimanates lead resistance errors Systems
• Fully protected against overloads
• Proven design
• Computer connectivity through RS 232