Sharmasons Sakova Instruments Private Ltd. Kavi Nagar, Ghaziabad, Uttar Pradesh

The set comprises of the auto variable transformers, current transformer, contactor, automatic cut-off, electronic time interval meter, capacitor & resistors for phase shifting, operating switches and meters for output parameters, housed in a cabinet made of FRP. Suitable switches are provided for selection of voltage and current ranges and type of relay contacts viz. NC/NO. The output current and voltage are continuously variable. The output is automatically cut off as soon as relay under test operates. The time interval meter indicates the time taken by the "Relay under Test" to operate. Separate terminals are provided for output voltage & current ranges and relay connections. The toggle & push switches, indicators, voltmeter, ammeter and variac knobs are provided on the control panel. Sturdy carrying case is provided for easy transportation. The T.I. Meter can also be programmed to measure pick-up and dropout time of contactors, independently. TECHNICAL SPECIFICATIONS: Input: 240 V±10%, 50 Hz., Single phase. Output: RTS – 01         RTS – 02X         RTS – 03 Ammeter & Voltmeter: Digital (3.5), accuracy – 1%. Time Interval Meter: Auto ranging from 0.0001 to 9999 Secs., Accuracy: 0.05%. Phase Shifting: 30, 45 and 60 degrees can be attained by R/C network provided in model RTS- 03 only. Dimensions: 18" x 12" x 8" approx. Weight: 30 Kgs. approx. Optional Accessories: Set of Testing leads, Carrying case with wheels for transportation.  

SAKOVA Primary Current Injection Set PIS-1000 is a high current supply unit, which is very easy to move about because of its convenient modular design. The primary injection set PIS-1000 is a compact instrument with a built-in ammeter, which meets the stringent requirements for accuracy, easy handling and performance. FEATURES: Primary testing of protective relay equipment. Turn ratio testing of current transformer. Testing Switchgear/Control gear. Commissioning tests that need a variable current. PIS-1000 comprises of two portable units viz. Control Unit and Current Unit with suitable terminals and metering, housed in painted M.S. Boxes which can be mounted on a foldable trolley for easy transportation.   TECHNICAL SPECIFICATIONS: Input: 240 Volts + 10%, 50 Hz. Output: 0-500/1000 Amps AC. Separate bus bars for the two ranges. Capacity: 5 KVA. Metering: Analog or digital, as desired. Duty Cycle: 5 minutes ON, 15 minutes OFF. Dimensions: Control/Transformer unit: 16”x 15”x 12” approx. Weight: Control Unit–30 Kgs. approx., Transformer Unit–45 Kgs. approx.

In all H.T. Transformers and Circuit Breakers etc. transformer oil or other insulant is a very important ingredient. The liquid insulant used should have a very high dielectric strength. To test the dielectric strength of the INSULANT, a very high voltage is passed through it. The failure of the dielectric strength of INSULANT is shown by a spark across two electrodes. The apparatus to carry out this test is manufactured by us in various voltage ranges and models, as per IS:6792/1972 and IEC-156, known as SAKOVA OIL TEST SET.   FEATURES: The set comprises of the following parts viz. Control Panel, H.T. Transformer and Oil Test Cell (with electrodes & Gauge), housed in a sheet-metal cabinet, having an acrylic covered housing for Oil Test Cell.   CONTROL PANEL: Continuously variable auto-transformer (variac) for smooth variation of output voltage, operated manually or by a constant speed synchronous motor, as desired. “MAINS” & “H.T.” “ON & OFF” Switches, incorporating automatic tripping mechanism for protecting the H.T. Transformer against overloading. Voltmeter to monitor output voltage, calibrated in Kilovolts. Zero Start interlocking device, so that the set will not be energized unless the variac is brought back to zero output position. Two pilot lamps, green and red for “MAINS ON” and “HT ON” indications. Fuse for the L.T. side, one 3-Pin plug with 1.5 meter long cable for mains connection

Insulation failure is one of the most common causes of electrical break-down. Regular testing however will reveal insulation weakness at early stage before serious damage can occur. Preventive insulation testing of electrical rotating machines, power distribution lines, communication cables, insulators, control and switching equipment etc. is therefore essential to avoid eventual breakdown. SAKOVA Megtester is a robust instrument incorporating a built-in hand driven generator and a solid state circuit for stabilized DC output. The insulation resistance measured is indicated on a logarithmic scale. SAKOVA Megtester meets the requirements of Indian Standard Specification IS: 2992-1980.   FEATURES: SMOOTH GENERATOR: Rotary magnet generator runs smooth with minimum noise because of the excellent dynamic balance of rotating parts. ELECTRONICALLY REGULATED OUTPUT VOLTAGE: Electronic regulation provides excellent long term voltage stability which is not possible with conventional centrifugal clutch mechanisms. OHM METER: The insulation resistance indicated by a moving coil type indicator on a logarithmic scale. QUICK RESPONSE: Quick response saves time and extends life of generator. TECHNICAL SPECIFICATIONS: Measuring Voltages: 100V, 250 V, 500 V, 1000V, 2500V or 5000V. Insulation Ranges: Up to 20,000 Megohms as desired. Accuracy: As per IS: 2992-1980. Casing: Aluminium casted body or Mica Laminated wooden body. Speed of handle: 160 RPM or above. Scale Length: Logarithmic Scale approx. 90 mm long. Dimensions: 220 x 120 x 130 mm approx. (Metal case). Weight: Metal case 2.3 kgs. approx.  

SAKOVA DC HV TEST SET has been designed to test the 11 KV & 33 KV cables, cable fittings, switchgears and high voltage installations. The desired DC voltages are applied to the “system” under test. The leakage current and the voltage applied are indicated by the meters, which help in determining the insulation resistance and dielectric strength of the “system” under test. FEATURES: Variable DC output 0-30KV or as desired. Automatic tripping at present leakage current, up to 10 mA. Earth connection interlock. Discharge rod comprising of small units for easy carrying. Zero Start interlock. Shielded HV output lead. Timer, adjustable up to 5 min. or as desired. Compact and portable housed in sheet metal box. Dimensions: 400 X 265 X 300 mms approx.(30KV unit). Weight: 25 kgs. approx.(with accessories).   AC High Voltage Test Set SAKOVA SAKOVA HIGH VOLTAGE BREAKDOWN TESTERS basically consist of a Double Wound High Voltage Transformer with the H.T. end brought out and terminated on a spring loaded prod for ratings up to 5 KV, or the H.T. end is brought out on a bushing. The lower end of the H.T. winding is at near earth potential and is also brought out, through intermediate circuitry and is terminated on the EARTH connection. The intermediate circuitry included at the lower end of thee H.T. winding enables tripping of supply to the H.T. Transformer, if the current through the test piece exceeds a predetermined value. The low voltage winding of the main HV Transformers rated for 230 Volts or as specified and is energized by means of a VARIAC through a fusee link and an intermediate contactor/relay. The provision of VARIAC enables gradual application of high voltage to the specimen under test. The “Zero start” interlock switch is provided. Indicating Lamps are provided on the panel of the instruments to indicate “MAINS ON” and “H.T. ON”. A Voltmeter is provided on the panel to indicate the output high voltage. The voltmeter is connected on the low voltage side of the main transformer but is calibrated to read the H.T. Voltage directly. The calibration is carried out at no load. If the failure of the test piece occurs, the supply to the Voltmeter is maintained, although the supply to the HV Transformer is instantaneously cut-off. The voltmeter, therefore, indicates thee voltage at which the test piece has failed. The testers of ratings up to 10 KV are housed in a single sheet metal housing while those of ratings above 10 KV comprise of control unit and a HV transformer unit made of sheet metal. The Testers are available for output voltages up to 100 KV and different current ratings as desired.    

Compact and portable. Contact Resistance Meter is meant for measurement of resistance of bus bar joints, male-female contacts of isolators, SF-6 Breaker contacts, GTS breaker contacts etc. of the sub-stations. The measurement of contact resistance is done by applying a DC current of 0-100 Amps. and measuring the voltage drop across the contacts. An ammeter and a millivoltmeter (Micro-ohmmeter) are provided measuring the current and resistance. A lamp indicates the AC supply position. A variac is provided for adjusting the output current from 0 to 100 amps. Fuse for protection against overload is incorporated. CRM Range: 0.1 micro-ohm to 19999 micro-ohm in two ranges.Input: 240 V ±10%, 50 Hz. ±5%.Output: 0-100 Amps., DC, continuously variable.

C B TIMER is a very compact and portable instrument which compromises of three nos. Programmable Time Interval Meters with necessary terminals, switches, indicators and miniature relays housed in a sunmica laminated wooden box. Two pairs of terminal are provided for DC supply (Input) and TripClose coils while three pairs of terminals for three “CONTACTS” (viz. Mainresistor auxiliary) of the Circuit Breakers. The CB Timer operates on 230 V AC mains supply. The T.I. Meters automatically record the tripclose timing of each of the contacts, with memory retention of 10 years.Time Interval Meters: 4 digit, auto ranging (programmable),Range: 0.0001 to 9999 Secs.Accuracy: 0.05%.

SAKOVA make Automatic Oil Test Set is designed for speedy and accurate testing of dielectric strength of circuit breakers oil and transformers oil in accordance with international standards like IEC-156, IS-6792 etc. FEATURES: The set comprises of an HV transformer, motorized variac, a micro-processor controller and a printer housed in an M.S cabinet. The HV electrodes are housed in an insulated cubicle made of FRP with a hinged acrylic cover with interlocking for safety. The control panel and the printer are protected from dust and in transit damage by a removable hinged MS cover.   CONTROL PANEL: The following settable parameters are provided for the custom test. No. of test sets : 1 – 99 No. of test per sets : 1 – 9 Initial stand time : 1-999 Secs. Stir time : 1-999 Secs. Intermediate stand time : 1-999 Secs. Rate of voltage rise : 0.5kV/Sec to 3kV/Sec. (in steps of 0.5kV) and 5kV/Sec. Reading and Average : Average BDV of the number of tests, 1-9, as selected is displayed.

We are offering electrical testing instruments, relay testing kits, primary current injection kits, oil bdv test kits, acdc hv testing kits, cb timers, contact res. Meters.