PROK DEVICES PRIVATE LIMITED Rajajinagar, Bangalore, Karnataka

Started our business operations as manufacturer, supplier, exporter and trader, we are engaged in offering TAP Position Indicator. Suitable for industrial environment, thee indicators are offered with potentiometer provision for trimming, in order to compensate the lead resistance. Apart from this, to ensure robust construction, these indicators are checked thoroughly. Features: Functional accuracy Precise reading Durable finish Details: Visual 7 segment digital display Onoff switch with lamp indication provided for power supply status Potentiometer provision for trimming to compensate the lead resistance Panel mounting with aesthetic value Robust & Rugged i.e. suitable for industrial environment Greater degree of accuracy & consistent reliability Specifications: Auxiliary Voltage 110 or 230 or 415V AC +15%, 50 Hz Resistance Tel-transmitter 1 kilo OHMS per step, 3 wire connection Display 1 to 99 positions 2 digit 7 segment LED display Accuracy Tolerance + 2% Lead compensation Trough a potentiometer adjustment in the front fascia Type of mounting Panel Mounting Operating temperature 0°C to 55°C Break down voltage 2KV, between all live terminal connected together and body for 1min Dimensions in mm 96 mmx96 mmx70 mm (Panel cutout size:90mmx90mm+0.1 -0.00) Applications: OLTC panel to indicate tap position

As one of the reckoned organizations, we are engaged in manufacturing, supplying, exporting and trading Static Overload Relay. Provided with visual LED indication, these relays are developed under the supervision of expert engineers, who hold extensive knowledge of this domain. Furthermore, owing to their features like superior performance, low maintenance, high tensile strength and longer service life, these relays are applicable in feederdistribution control panel and generator control panel. Features: Reliable operation High speed Durable Details: Static device Wide operating range 40%-200% of rated current In Compact in size an d aesthetic value Visual LED indication Rugged, Robust and Tropicalised design Tamper proof acrylic cover Specifications: Auxiliary voltage 230VAC, 50 Hz Current input 5 amp or 1 amp Operating Range 50%to 200% Tripping time Fixed or Variable

Understanding the demands of customers as a manufacturer, supplier, exporter and trader, we are providing Static Earth Fault Relay. Our offered relays are current sensing devices that are tropicalized and manufactured employing advanced machinery and technology. Can be installed with various earth fault protective schemes, the relays offered by us finds their application in generators, alternators, transformers and feeders. Features: Static Device Compact, Reliable with Aesthetic Value Rugged, Robust and Tropicalised design Consistent repeat accuracy Wide Current Operating range LED Indication for Healthy & Fault Status Manual Reset & Low Burden on CT Secondary Specifications: Auxiliary Voltage 110V230V415V550V, AC 50 Hz 48110220 VDC Frequency 50Hz Neutral or Summation CT Rated Current-In 1A or 5A (Factory Set) Burden on CT

Positioned in the industry as a manufacturer, supplier, exporter and trader, we are engaged in offering smps battery chargers. Available with suitable voltage and current ratings, these chargers are available in different models and specifications. To develop these chargers, we make use of transformer, diodes, capacitors and inductors, which are sourced from authentic vendors of the industry. Features: longer life span high performance precisely design details: wide input voltage tolerance high efficiency overload, short circuit & reverse polarity protection very low load & line regulation output power up to 480w rugged, reliable and tropicalised design work with natural convection cooling(no forced air cooling required) the operating temp. Is -5°c to +55°c input and output terminations and led indications specifications: input voltage range 90v to 270v, 160v to 270v ac 50 hz nominal output voltage 12v,24v,30v,110v dc rated output current 1.2a,2a,4a,5a,8a,10a,15a and 20a output voltage regulation 0.5v switching frequency 130khz efficiency >80% ripplenoise peak-peak 250 mv without battery connected at the output min load condition no min load requirement for voltage regulation or operation of the float charger inputoutput connector pcb mounted terminal block storage temp -20°c to +55°c operating temp -5°c to +55°c humidity 95% rh led indications ac mains present : red led output voltage present : green led protections fuse at the input (slow blow) isolation of 2kv between input & output protection against output short circuit protection against transient surge at input through proper rated mov’s over temperature protected, with auto restart cooling natural convection

Backed by rich industry experience, we have been able to manufacture, supply, export and trade Restricted Earth Fault Relay. Our offered relay is a universal protection device that is demanded for high, medium and low voltage networks. Owing to their various features like study construction, minimal maintenance and microprocessor base design, these relays are demanded to be used for various industrial applications. Features: Microprocessor base design Optimum performance Rugged construction Details: Microprocessor Based Design Wide Setting Ranges Universal Auxiliary supply 85-275V ACDC Rugged and Compact Design 8 Character Back-lit LCD Display of Fault current Specifications: Rated Current: 5 Amps Plug setting Range: 5% – 80% in steps of 1% Operating Time: Instantaneous(

Brand Name : PROK DVS

With the aid of modern machinery and technology, we have been able to manufacture, supply, export and trade phase failure relay. Fully static, these relays are widely used for large number of motor applications as are developed in tandem with the guidelines laid in the industry. To suit the requirements of clients, we offer these relays in selectable percentage unbalance settings and automanual reset operations. Features: high performance precisely design trouble free functionality details: negative phase sequence detection low power consumption selectable percentage unbalance settings automanual reset operation fail safe system accurate, reliable and tropicalised din railsurface mounting type specifications: system voltage: 415v ac 3 phase 50 hz fixed tripping time delay: 2.5 sec ± 0.5 sec unbalance voltage setting : 10% or 20% (user selectable) reset: manualauto relay contacts: 2 co , potential free contacts normally energized (fail-safe) auxiliary voltage: 110220415v ac 50 hz mounting: din typesurface (fixing on 35 mm din channel) dimensions: 75×95×75mm(l×h×d) applications: suitable for motors of any hp ratings power supply distribution boards agriculture pump control panels

Meeting the demands of customers as a manufacturer, supplier, exporter and trader, we are offering Numerical Voltage Relay. Keeping in mind the protection of power plants and feeders, these relays are applicable in protection of motor & generators and main or backup protection. Appreciated for longer functional life and integrated draw out system, our offered relays are provided with modular integrated draw out system and nonvolatile memory for data retention. Features: Long functional life High speed Integrated draw out system Details: IDMT & Definite time characteristics Negative phase sequence detection High Pickupdrop off ratio Modular Integrated draw out system Nonvolatile memory for data retention Wide range of system voltages High speed feature for under voltages and over voltages 2 line, 16 character back-lit LCD display and key pad Very low burden on measurement and Aux circuits Accurate and reliable measurement of voltages Field selectable system voltages Specifications: System Voltage 380V, 400V, 415V and 433V-3Ph 4W Frequency Range 45 Hz to 65 Hz Pick-Up Over Voltage-101% of Set Value Under Voltage-99% of Set Value Drop-Out Over Voltage 1% Below Pick-Up Voltage Under Voltage-1% Above Pick-Up Voltage Response Time >) for >25% (0.0-5.0 Sec) in Steps of 0.1 Time for Higher Set (UV) (0.0-5.0 Sec) in Steps of 0.1 Applications: Protection of motor and generators Main or backup protection For detection of OV&; UV in power plants and distribution system Protection of transformer panel & Capacitor control panel

Being a client-centric organization, we are engaged in manufacturing, supplying, exporting and trading Numerical Over Current Relay. Based Over Current Relay (OCR) with Earth Fault Relay (EFR), these relays are extensively used for selective over current. Apart from this, applicable in substations and industrial networks, these relays are widely used for earth fault protection of radial feeders in impedance earthed power systems. Features: Definite time curve for both Phase & Earth along with optional user defined curve Low AC burden Reliable auxiliary supply of wide range input of 18-85 or 85-275 volts AC or DC Non-Volatile memory for data retention and retrieval in the event of power failure Unique combination of 505150N51N in a single gadget Consistent repeat accuracy High Drop-offPick-up ratio Poly carbonate front cover with external reset switch Specifications: Accuracy Of Operating Time: For Idmt,Definite Time and Instantaneous ±5%, ±3% and Less than 2 Cycles Relay Rated Current (In) 1A or 5A user selectable Frequency 50 Hz or 60 Hz Auxiliary Voltage Range 85V-275V ACDC, 21-130V DC Pick-Up 103% Drop-Off 97% Ac Burden < 0.4VA for 5A and < 0.2VA for 1A Dc Burden < 5W during non operated condition and < 7W during operated condition Dimensions 151 x181x195 mm (WxHxD Mounting Flush Panel Cut-Out 151 x 157 mm + 0.1mm Contact Rating AC: 250 V @ 30 AMP and DC: 24 V @ 30 AMPS, 2 CO or 3 CO Operating Temperature 5 to +55°C

Taking quality as our prime importance, we are engaged in manufacturing, supplying, exporting and trading Motor Protection Relay . Ideal for motor protection, these relays are manufactured using reliable hardware with special algorithms, which allows to calculate the tripping time. Continuously monitors the three phase currents to build the thermal replica, which is used to protect the motor against thermal overloads, these relays are appreciated for accurate measurements and thermal memory. Features: Accurate measurements Thermal memory Dimensional accuracy Other Details: Selectable Thermal Trip Time characteristics Class - 10A, 10, 20 and 30 Pre-alarm at 105 % of Im by Potential Free Output Contacts Fault records up to Previous 999 faults and 20 Previous On-Board faults with Date and Time stampings IncrementDecrement Key and ModeSet key in front facia Operational and Type Nature of Fault indications through OLED Communication through Modbus protocol with RS-485 Port EnableDisable option for Earth Fault, Under Current, Locked Rotor, Phase Unbalance Protection Various Models with Current ratings Dimensions in mm: 70X75X109 (WXHXL) Operating Temp: 0c to +60c Auxiliary Power Supply: 85-275V ACDC Trip Accuracy: As per IEC 947-4-1Trip Class 10A, 10, 20, and 30 Pick-Up Accuracy: +- 12.5% Specifications: Thermal Over Load Protection: Over Load Current Setting Range 2.0Amps 96.0Amps in 4 ranges as explained in SL.13 Trip Time Characteristics Class 10A, 10, 20 &30 as per IEC 947-4-1 Pre-alarm at 105 % of Im by One set of Potential Free output Contacts Thermal Memory Provision Earth Fault Protection: Earth Fault Current Setting Range10% to 50% of Im, in steps of 1% (20% - Factory Set) Trip Time Delay 0.1Sec to 5.0Sec in steps of 0.1Sec (0.1Sec - Factory Set) EnableDisable Option Phase Unbalance: Unbalance Current Setting Range 10% to 50% of Im, in steps of 1% (40% - Factory Set) Trip Time Delay 0.1Sec to 5.0Sec in steps of 0.1Sec (2.0Sec - Factory Set) EnableDisable

Usage : Protective

Prok dv's make digital microprocessormicrocontroller based earth leakage relays (elr) with core balance current transformer (cbct zct) are used to detect leakage currents in electrical power systems. Elr transmits a signal to activate the trip coil of the mccbacbocbcontactor in the event of earth leakage resulting in automatic isolation of the load. Elr have been widely used and accepted because of field adaptability and are economic.

Prok devices pvt ltd an iso 9001-2008 company introduces digital microprocessor micro controller based idmt definite time instantaneous earth fault relay (efr). It is a current sensing device which is semitropical professionally designed and tested for protection of generators, transformers and feeders. Prok dv's make digital microprocessor micro controller based idmt definite time instantaneous earth fault relay (efr) can be employed with various earth fault protective schemes

We are instrumental in manufacturing, supplying, exporting and trading dual energy meter. Employing modern machinery and cutting-edge technology, these meters are manufactured with user friendly features, owing to which demanded for generator panel & capacitive power plant, oem application, test benches and laboratory equipment. Ideal for industrial environment, these meters are extensively demanded by our customers. Features: compact size high performance varied specifications details: true rms measurements accuracy class 1.0 2 –line, 16 char back lit lcd display confirms to is-13779 iec-62052-11& iec-62053-21 ct ratio- selectable from 55 to 30005 rs 485 modbus communication port compact and ideal for industrial environment display parameters: e.b energy ( 6.3 format) d.g energy (6.3 format) line voltages (vr, vy, and vb with respect to neutral) line currents (ir, iy, and ib) line frequency average power factor lag or lead active power- r ph, y ph, b ph & summation eb on hour dg on hour l.e.d indications: presence of phases (r, y, b) reverse polarity presence of d.g source specifications: accuracy class class1.0 frequency 50hz ± 5 % system voltage 415v ac110v ac auxiliary 40-275v acdc operating temperature -5°c to + 55°c ct ratio-field programmable 55 to 30005 in steps of 5 power consumption-sensing voltage current input auxiliary less than 0.2 va, less than 0.2 va, less than 5 va weight 300 grams models pdm9023 – 3ph. 4w dimensions 96x96x70 mm (wxhxd) mounting flush impulseskwhr 15000 applications: electrical panels- ht & lt panels generator panel and capacitive power plant oem application test benches and laboratory equipment

Acclaimed in the market as a manufacturer, supplier, exporter and trader, we are engaged in offering digital vaf meter. Measures voltages, current and frequency accurately, these meters are developed by building in transducers and selector switch. Further, provides continuous display of line voltage, phase voltage and three phase currents, these meters are demanded for power control centers, motor control panels, test benches and laboratory equipment. Features: longer life span high performance adjustable system details: accuracy class 0.51.0 micro controller based built in transducers built in selector switch built in scrollhold facility field selectable ct ratio compact in size 2-line, 16- char back lit lcd display tropicalised design and time tested low power consumption scroll facility continuous display of line voltage, phase voltage, three phase currents and system frequency specifications: parameter current voltage frequency nominal rage nominal rage nominal rage aux. Supply voltage ac 110v 80-130v 110v 80-130v 110v 80-130v 230v 160-300v 230v 160-300v 230v 160-300v sensing ct 5.0 amps 0.26-6.0a … … … … 1.0 amps 0.05-1.2a … … … … sensing input voltage ac … … 63.5v 50-76v … … applications: electrical distribution control & relay pan power control centers motor control panels test benches and laboratory equipments wind energy and co-generation plants air conditioning refrigeration plants

Counted among the prominent manufacturers, suppliers, exporters and traders, we are engaged in offering digital reverse power relay. As a microprocessor control based relay, these provide accurate and precise, owing to which demanded by our customers across the globe. Used for the protection of generators, these relays have visual indication of power and display continuous sensing of voltage, current and frequency. Features: longer life span high performance precisely design details: microcontroller based, hence accurate and precise protection of generator prime movers against reverse power visual indication of power, pick-up and relay tripping display of reverse power on the lcd continuous display of sensing voltage, current, frequency and power factor with leadlag indication wide auxiliary voltage range from 85–275v acdc cost effective and highly reliable compact design test facility, allowing the user to check the no and nc contacts of the relay specifications: rated current: 5 amps trip level: 4%–20% in steps of 1% delay: 0–20 sec in steps of 0.1 sec sensing voltage range: 50–500v frequency range: 40–60 hz auxiliary supply: 85-275v acdc out put relay: 2 co,250v, 8a ac 30v, 8a dc operating temperature: -5 to +55°c panel cut out: 137x137+0.1mm enclosure dimensions: 144x144x105 mm applications: protection of generator and prime moverturbine

Well-known in the industry as a manufacturer, supplier, exporter and trader, we are engrossed in offering Digital Frequency Relay. Provide continuous display of the measured frequency, these relays are applied as backup protection for mechanical over speed devices in order to avoid damages. Finds its application in generator and captive power plant, our offered relays are also used for mechanical over speed devices. Features: Low maintenance User selectable trip timings High performance Details: Dedicated microcontroller based Accurate, reliable and tropicalized design Continuous display of the measured frequency User selectable upper frequency and lower frequency limits User selectable trip timings Uses SMPS for Auxiliary Power i.e. Wide operating range for Auxiliary Input 85V-285V ACDC Specifications: Rated Voltage: 230V415V AC Auxiliary Supply: 85V-275V ACDC Frequency Setting Range: 40-60 Hz. In steps of 0.1 Hz Power Supply Burden: < 3Watts Contact: Single change over contacts For Under frequency 8 Amps@250V AC, 8 Amps@30VDC Potential free contacts Turn Off delay: 0.05-10.0 Sec In steps of 0.05sec Definite time, User selectable Dimensions: 144X144X120 mm Panel Cut Out: 137X137 mm Applications: Generator and captive power plant Over frequency relay applied as backup protection for mechanical over speed devices to avoid damages to prime mover Under frequency relay applied to protect field winding from excessive current, voltage regulator from over load Servo controller and inverters

Ours is a well-known entity, which is engaged in manufacturing, supplying, exporting and trading digital energy meter. Owing to their features like selectable ct ratio and source energy recording with display of voltage, current, frequency and power factor, these meters are applicable for generator panel and capacitive power plant. Engineered to perfection, these meters are available in different specifications. Features: precise engineering high material strength user-friendly details: true rms measurements accuracy class 1.0 2 –line, 16 char back lit lcd display confirms to is-13779 iec-62052-11& iec-62053-21 ct ratio- selectable from 55 to 30005 rs 485 port – mod bus protocol compact and ideal for industrial environment display parameters: e.b energy ( 6.3 format) line voltages (vr, vy, and vb with respect to neutral) line currents (ir, iy, and ib). Line frequency. Average power factor lag or lead active power- r ph, y ph, b ph & summation eb on hour l.e.d indications: presence of phases (r, y, b) reverse polarity specifications: accuracy class class1.0 frequency 50hz ± 5 % system voltage 415v ac110v ac auxiliary 40-275v acdc operating temperature 0°c to + 55°c ct ratio-field programmable 55 to 30005 in steps of 5 power consumption-sensing voltage current input auxiliary less than 0.2 va, less than 0.2 va, less than 5 va weight 300 grams models pdm9023 – 3ph. 4w dimensions 96x96x70 mm (wxhxd) mounting flush applications: electrical panels- ht & lt panels generator panel and capacitive power plant oem application test benches and laboratory equipment

Single Phase DIGITAL MICROCONTROLLER BASED AUTOMATIC CHANGEOVER CUM CURRENT LIMITER (ACCL) are enclosed in ABS grade Thermo plastic enclosure.LED indication of all operational status.ACCL are provided with different ON-TIME delay, so that generators are not loaded suddenly. This feature enhances the life of the generators and switchgear. Teflon wires having very high insulations are used for the internal wiring.

Focusing on the quality of the products, we are engaged in manufacturing, supplying, exporting and trading AC Voltage Relay. These are voltage monitoring and supervision relay for polyphase system that are extensively used for monitoring both under voltage and over voltage conditions. User-friendly in nature, these relays provide accurate reading for balanced and unbalanced load. Also, these relays are applicable For protection of synchronous & induction motors and transformer feeder panel. Features: User friendly setting Low power consumption Flawlessness Finish Details: Site selectable system voltage Continuous display of the measured voltage parameter 16 character 2 line LCD display with back-lit Accurate reading for balanced and unbalanced load Wide range of auxiliary input for both AC & DC Independent contacts for both Under & Over voltage Self reset & site selectable reset gap Built in fixed instantaneous Under & Over voltage highest trip User friendly setting modes using key pads Specifications: Parameter 3 Phase 4 Wire 3 Phase 3 Wire Aux voltage 85 to 275V ACDC 85 to 275V ACDC System voltage Un 220V230V240V250V AC site selectable 110V380V400V415V433V AC site selectable Over voltage setting range 101% to 120% in steps of 1% site Selectable 101% to 120% in steps of 1% site Selectable 0-30sec in steps of 0.1sec 0-30sec in steps o f 0.1sec Over voltage trip time 70% to 99% in steps 1% Site selectable 70% to 99% in steps 1% site Selectable Under voltage setting range 0-30sec in steps of 0.1sec 0-30 sec in steps o f 0.1sec 1% to 5% o f Un in steps of 1% 1% to 5% of Un in steps of 1% Under voltage trip time 0 -30sec in steps of 1sec 0 -30sec in steps o f 1sec Reset gap Fixed UV high set 120% of Un Fixed UV high set 120% of Un On time delay Independent contact for UVOV Independent con tact f or OVOV