Prok Dvs Products

Product Details:

The micro-controller continuously monitors the magnitude of the phase current and the neutral current .whenever the phase current or the earth current magnitude exceeds the present value corresponding line / earth element will pick up and relay will trip after time interval calculated by the selected IDMT curves. Whenever the fault level exceeds the selected high set range, the relay will trip for high set, ignoring the selected IDMT curves. The timer logic is processed and after comparison with set time schedules, tripping signals are issued accordingly. There are two output relays , each output relay has two change over contacts either for alarm or tripping. The output relays are programmable. The relay rating (In) is field selectable either 1A or 5A. The relay has RS 485 com port which can be used with modbus protocol for communication purposes.

Features:

• Three phase, low-set, non - directional Over current relay with inverse definite minimum time (IDMT) or definite time characteristics
• Three phase, high-set, non-directional Over current relay with instantaneous or definite time function
• Low-set non -directional Earth fault Relay with inverse definite minimum time (IDMT) or definite time characteristics
• High-set non-directional Earth Fault Relay with instantaneous time or definite time function
• Modular Integrated Draw Out System for field adaptability and tropicalised design (MIDOS)
• Password protection
• 2 line 16 characters industrial grade LCD with back-lit module for numerical display of setting values and measured values which is user friendly
• Enabling /Disabling o f High-Set
• RS-485 communication port with modbus protocol
• Relay test facility with relay trip & without relay trip
• 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
• Unique combination o f 50/51/50N/51N in a single gadget
• High Drop-off/Pick-up ratio

Applications:

• 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 o f 50/51/50N/51N in a single gadget
• Consistent repeat accuracy
• High Drop-off/Pick-up ratio
• Poly carbonate front cover with external reset switch

Additional Information:

• Item Code: PNA402D

Product Details:

SStatic Phase Failure (Pfr) Relay / Single Phasing Preventor (SPP) from Prok dv's works on the principle of negative phase sequence voltage detection of the incoming supply. Monitoring of the unbalance in the supply voltage is the proven technique which has been adopted in the Static Phase Failure (Pfr) Relay / Single Phasing Preventor (SPP).

Features:

• Negative phase sequence detection
• Low power consumption
• Selectable percentage unbalance settings
• Auto/Manual reset operation
• Fail safe system
• Accurate, reliable and tropicalised
• Din Rail/surface mounting type

Applications:

• Suitable for motors of any HP ratings.
• Power supply distribution boards.
• Agriculture pump control panels.

Additional Information:

• Item Code: PFR

Product Details:

PROK DEVICES PVT LTD an ISO 9001-2008 company introduces Digital Microprocessor / Microcontroller Based Idmt / Definite Time / Instantaneous Earth Fault Relay  (EFR).It is a current sensing device which is tropicalised professionally designed and tested for protection of Generators, Transformers and Feeders. Prok dv's make Digital Microprocessor / Microcontroller Based Idmt / Definite Time / Instantaneous Earth Fault Relay (EFR) can be employed with various earth fault protective schemes, which are explained in brief with figures. The magnitude of the earth fault current depends on the fault impedance and invariably the fault impedance for earth fault is higher than that for phase faults, hence the earth fault current is low compared to the phase fault currents. The fault impedance depends on the system parameter and also on type of earthing. The neutral may be solidly grounded, grounded through resistance or reactance.

Features:

• Compact
• IDMT (4 IEC curves), Definite Time & Instantaneous
• Wide setting ranges
• Fully digital acquisition & processing of data
• Wide operating voltages
• LCD display of operated current & fault current
• Rugged and Tropicalized design

Additional Information:

• Item Code: MPEFSPL01

Product Details:

The unit has LCD for displaying the fault current (at the time of tripping) and setting values (curves, plug setting & TMS). The LEDs are provided for indicating power ON status and to indicate IDMT or DEFINITE TIME or INSTANTANEOUS mode operation. Key pads are provided for easy setting/changing of the parameters.The design is tropicalised and rugged.

Features:

• Compact
• IDMT (4 IEC curves), Definite Time & Instantaneous
• Wide setting ranges
• Fully digital acquisition & processing of data
• Wide operating voltages
• LCD display of operated current & fault current
• Rugged and Tropicalized design

Additional Information:

• Item Code: DMPEFSPL01

Product Details:

Prok dv’s make Definite Time / Instantaneous Static Earth Fault Relay (EFR) is a current sensing device which is tropicalised, professionally designed and tested for protection of Generators, Transformers and Feeders. Prok dv’s make Static Definite Time & Instantaneous Earth Fault Relay (EFR) can be employed with various earth fault protective schemes, which are explained in brief with figures. The magnitude of the earth fault current depends on the fault impedance and invariably the fault impedance for earth fault is higher than that for phase faults, hence the earth fault current is low compared to the phase fault currents. The fault impedance depends on the system parameter and also on type of earthing. The neutral may be solidly grounded, grounded through resistance or reactance.

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

Additional Information:

• Item Code: EFSPL01

Product Details:

Specification:

Neutral or Summation CT Rated Current-In - 1A or 5A (Factory Set)

Burden on CT -

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

Additional Information:

• Item Code: DEFSPL

Product Details:

The application of powerful microprocessors Digital Microprocessor Based Restricted Earth Fault Relay (REFR) opens a new chapter for power system protective relaying. The digital processing of measured values and the ability to perform complex arithmetic and logic operations, give digital protection relays significant performance and flexibility improvements over their traditional analogue counterparts. Additional advantages - very small power consumption, adaptability, self-supervision, smaller physical construction and selectable relay characteristics - all combine to allow the implementation of accurate and highly reliable protection schemes at a significantly reduced financial burden.

Features:

• Microprocessor Based Design
• Wide Setting Ranges
• Rugged and Compact Design
• 8 Character Back-lit LCD
• Display of Fault current

Additional Information:

• Item Code: DMPREFR

Product Details:

Earth Leakage Current give rise to generation of heat and result in progressive failure of insulation, which leads to earth faults sparking flashovers, deterioration of earthing and finally
results into catastrophic fires which destroys costly equipments, gadgets and precious lives. It is therefore essential to detect earth leakage current well before they cross the threshold
limits and isolate the circuit in the event of leakages.

Prok dv's make Digital microprocessor/microcontroller 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 MCCB/ACB/OCB/CONTACTOR in the event of earth leakage resulting in automatic isolatio  of the load. ELR have been widely used and accepted because of field adaptability and
are economic.

Features:

• Microcontroller based compact design.
• Continuous monitoring and display of set value and measured value of leakage current.
• 8 character 2line LCD displays with back lit.
• Test & Reset facility.
• CBCT connection monitoring facility
• True Rms measurement of leakage current.
• Trip Circuit Failure indication (Optional) Default:Disabled
• Serial RS 485 communication port with modbus protocol (optional)
• Fault recording with date and time stampings, max up to 10 Faults (optional)
• Tropicalised and rugged design.
• External test, reset, fault & healthy indication suitable for mining

Application:

• Frame leakage protection for LT control panels and switchboards.
• Earth leakage protection for feeders. /motors/generators/transformers/mobile operating equipments.
• Protection for hazardous sensitive environments like oil refineries/chemical platform/pulp industries and general electrical distribution also where drives and soft starters are used.
• Protection for mining and control engineering.
• Protection for Marine and control engineering.

Additional Information:

• Item Code: MPEL01

Product Details:

Prok dv’s brand earth leakage relay MPEL series uses the state of the art microcontroller based protection device to detect low level leakage due to degradation of insulation of phase conductors or high impedance faults. The main feature of MPEL is the continuous display of earth leakage currents of the power system. The unit is immune to external disturbance like harmonics and transients.

Features:

• Microcontroller based compact design.
• Continuous monitoring and display of set value and measured value of leakage current
• 8 character 2line LCD displays with back lit
• Test & Reset facility
• CBCT connection monitoring facility
• True Rms measurement of leakage current
• Trip Circuit Failure indication (Optional) Default:Disabled
• Serial RS 485 communication port with modbus protocol (optional)
• Fault recording with date and time stampings, max up to 10 Faults (optional)
• Tropicalised and rugged design
• External test, reset, fault & healthy indication suitable for mining Application
• High sensitive leakage current setting (5mA to 1.00A) (MODEL:MPELSPL)

Applications:

• Frame leakage protection for LT control panels and switch boards.
• Earth Leakage protection for Feeders / Motors / Generators / Transformers / Mobile Operating Equipments.
• Protection for hazardous sensitive environments like Oil Refineries/Cement Plant/Chemical
• Plant/Steel Plant / Pulp Industries and General Electrical Distribution.
• Protection for Mining and Control Engineering.

Additional Information:

• Item Code: MPEL02

Product Details:

Installation Procedure For Earth Leakage Relay Cbct:

Check the sensitivity of Earth Leakage Relay and also the inner diameter of core balance current transformer.

The Serial No. of the ELR and CBCT should match for better performance (the performance shall be guaranteed if the serial no. of the ELR and CBCT are matched).

Check the Auxiliary Supply of ELR and proper Voltage i.e. the rated Auxiliary Voltage.

The ELR have one pair of potential free change over contact for tripping purpose. Use rated current and rated voltage (refer the specification of our product). One pair of change over contact i.e., N/O Contact and N/C Contact can be used depending upon the tripping management.

Features:

Digital Microprocessor / Microcontroller based compact design.

Continuous monitoring and display of set value and measured value of leakage current.

8 character 2 line LCD displays with back-lit.

Test & Reset facility.

CBCT / ZCT connection monitoring facility.

True RMS measurement of leakage current.

Trip Circuit Failure indication.

Immune to harmonics and transients.

Serial RS. 485 communication port with Modbus Protocol (optional).

Tropicalized and rugged design.

Transducer Output- (4 mA-20mA) (optional).

External Test, Reset, Fault & Healthy indication suitable for Mining application.

Applications:

Frame leakage protection for LT control panels and switchboards

Earth leakage protection for feeders

Protection for hazardous sensitive environments like oil refineries/chemical platform/pulp industries and general electrical distribution also where drives and soft starters are used.

Protection for mining and control engineering

Protection for Marine and control engineering

Additional Information:

• Item Code: MPELSPL01

Product Details:

The rise of leakage current in Electrical Power Distribution are quite dangerous, resulting in Electrical hazards and catastrophe. Leakage Current are due to deterioration of insulations, negligence of wire man, Bad wiring, Inferior / substandard usage of Electrical Materials , ageing or endurance of Electrical environment. First and foremost importance should be given for the proper earthing of electrical net work-system. Most of the Industries, Commercial establishment and domestic application the earthing of electrical system is ignored and improper maintenance of the same. The Earth Leakage Current are very low and are sensitive leakage current can be detected by Earth Leakage Relay and core balance current transformer. ELR detects the Leakage Current in the circuit and isolate the power supply by switching off the tripping device (circuit breaker / contactor etc).

Features:

Microcontroller based compact design

Continuous monitoring and display of set value and measured value of leakage current

8 character 2line LCD displays with back lit

Test & Reset facility

CBCT connection monitoring facility

True Rms measurement of leakage current

Trip Circuit Failure indication (Optional) Default:Disabled

Serial RS 485 communication port with modbus protocol (optional)

Fault recording with date and time stampings, max up to 10 Faults (optional)

Tropicalised and rugged design

External test, reset, fault & healthy indication suitable for mining Application

High sensitive leakage current setting (5mA to 1.00A) (MODEL:MPELSPL)

Applications:

Frame leakage protection for LT control panels and switch boards.

Earth Leakage protection for Feeders / Motors / Generators / Transformers / Mobile Operating Equipments.

Protection for hazardous sensitive environments like Oil Refineries/Cement Plant/Chemical

Plant/Steel Plant / Pulp Industries and General Electrical Distribution.

Protection for Mining and Control Engineering

Additional Information:

• Item Code: DMPEL01

Product Details:

Prok dv's make PNA Type Idmt/Definite Time/Instantaneous Low-Set/High-Set Nondirectiona Numerical/Microprocessor Based Over Current Relay (Ocr) With Earth Fault Relay (EFR) or independent over current Relay (OCR) or earth fault relay (EFR). This is intended for protection application in medium voltage networks. These networks may have isolated or resistance impedance earthed or solidly earthed neutral points. Definite time over current relays are both suited for isolated systems and for use as back up to differential relays and distance relays. Inverse time relays (over current relays with various inverse times - current characteristics) are advantageous for interconnected systems and solidly grounded systems. Another tool for reducing the tripping time for faults near the source is to use the added instantaneous ( high set ) feature in the numeric relay .if the fault occurs during the setting of relay ,the relay shall operate / trip for the previously selected / default settings.

Features:

• Three phase, low-set, non - directional Over current relay with inverse definite minimum time (IDMT) or definite time characteristics
• RS-485 communication port with modbus protocol
• Password protection
• Three phase, high-set, non-directional Over current relay with instantaneous or definite time function
• Low-set non -directional Earth fault Relay with inverse definite minimum time (IDMT) or definite time characteristics
• High-set non-directional Earth Fault Relay with instantaneous time or definite time function
• Modular Integrated Draw Out System for field adaptability and tropicalised design (MIDOS)
• 2 line 16 characters industrial grade LCD with back-lit module for numerical display of setting values and measured values which is user friendly
• Trips for default/previously selected curve if the fault occurs during settings of the relay
• Membrane key pad for easy operation, dust proof front panel
• Enabling /Disabling of High-Set

Additional Information:

• Item Code: PNA442D

Product Details:

Relay has modbus protocol with RS 485 port with baud rate 9600bps. Another model is established for special applications with baud rate115kbps.Relay records 99 faults with date and time. Relay rating (In) is field selectable- either 1A/5A.The output relays are configurable Configurable options for enabling & disabling of high-set in both Phase & earth.

Features:

Three phase , low-set, non - directional Over current relay with inverse definite minimum time (IDMT) or definite time characteristics

Three phase, high-set, non-directional Over current relay with instantaneous or definite time function

Low-set non -directional Earth fault Relay with inverse definite minimum time (IDMT) or definite time characteristics

High-set non-directional Earth Fault Relay with instantaneous time or definite time function

Password protection

Enabling /Disabling o f High-Set

RS-485 communication port with modbus protocol

High Drop-off/Pick-up ratio

Poly carbonate front cover with external reset switch

Consistent repeat accuracy

Additional Information:

• Item Code: PNA422D

Product Details:

PNA Type Idmt/Definite Time/Instantaneous Low-Set/High-Set Directional Numerical/Microprocessor Based Over Current Relay (Oct) With Earth Fault Relay (EFR) receives the input current signals (phase current and neutral current) via four input current transformers. These signals are galvanically de-coupled, suitably filtered and fed to the micro-controller, for amplitude calculation and further logical processing.

Features:

• Three phase, low-set, non - directional Over current relay with inverse definite minimum time (IDMT) or definite time characteristics
• Modular Integrated Draw Out System for field adaptability and tropicalised design (MIDOS)
• RS-485 communication port with modbus protocol
• Relay test facility with relay trip & without relay trip
• Separate heavy duly output contacts provided f or time delayed phase fault with high-set and time delayed Earth Fault with high-set
• 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
• Consistent repeat accuracy
• High Drop-off/Pick-up ratio
• Poly carbonate front cover with external reset switch

Additional Information:

• Item Code: PNA430D

Product Details:

Prok dv’s make Microcontroller Based Motor Protection Relay PD-MMPR-303 uses the state-of-the-art Microcontroller based measurement techniques for providing protection for Motors up-to 75HP. The comprehensive protection features of the relay make it ideal for Motor protection. The heart of the relay is microcontroller based reliable hardware with special algorithms to calculate the tripping time. The relay continuously monitors the Three Phase Currents to build the thermal replica of the Motor. This thermal replica is used to protect the Motor against Thermal over Loads.
The Microcontroller Based Motor Protection Relay does not require external Current Transformer (CT) for its operation for within the bandwidth of Im ranges. The three phase R, Y and B cables are made to pass through the CT hole which is in the relay. The built in CT’s takes care of stepping down of the Currents to the required level. The stepped down three phase Currents are continuously monitored by the relay to detect any abnormal behavior of the Motor and to make tripping decision.

Features:

• Accurate and Real Time TRUE RMS measurements
• Motor Rated Current (Im) Selection by means of Pot meter with markings
• Earth Fault Setting provided by means of Pot meter with markings
• Selectable Thermal Trip Time characteristics Class - 10A, 10, 20 & 30
• I > Thermal over load above105 % of Im - provided through visual led indication
• Provided the Thermal replica for motor overload condition
• Continuous monitoring of Motor IDLE/Stop, COLD, WARM, HOT, I> & Various Fault status through visual LED indication
• Various Models with Current ratings
• Compact and Reliable
• Manual TEST / RESET Facility

Additional Information:

• Item Code: PDMMPR02

Product Details:

Prok dv’s make Microcontroller Based Motor Protection Relay continuously monitoring Real Time Motor Current of all the Three Phases. When the Motor Current exceeds the set value Im, the relay issues a trip command after the calculated time elapse (Based on selection of trip Class). The relay visually indicating the fault trip status by means of LED’s.
Two Set of potential free output changeover contact is provided in the relay C& NC and C& NO for trip circuit .The relay continuously monitors the Currents and using this data it builds Thermal replica of the Motor and monitoring the Thermal status of the Motor. This information is used to protect the Motor against Thermal over Loading.

Features:

Over Load Current Setting Range 1.0Amps – 96.0Amps in 4 ranges as explained in SL.13

Trip Time Characteristics Class -10A, 10, 20 &30 as per IEC 947-4-1(Default: Trip class 20) if none of the trip class selected by means of Dip switch

Thermal overload pick up above 105 % of Im indication through blinking of TOL led

Provided the Thermal Replica for Motor over load

Thermal overload pick up status I> indicated through visual LED indication

Additional Information:

• Item Code: PDMMPR03

Product Details:

RISC architecture based, intelligent state-of-the-art PNPF Prok dv's make Digital Microcontroller based Intelligent Automatic Power Factor Controller/Regulator/Correction Relay (APFCR) with on-line monitoring of line PF through industrial grade back-lit LCD Display. The Unit uses one of the tried and time tested intelligent algorithms to switch the capacitor banks, in a most optimum combination in a shortest time for any dynamic load conditions without the need to select the complicated switching sequences by the user.

Features:

User entered parameter is stored in non-volatile memory (EEprom)

CT Ratio & System Voltage user selectable through key board display

Independent of Frequency

Most Optimum combination obtained through advanced control programming

RISC architecture dedicated Microcontroller based

Target pf 0.80lag to 0.90 lead selectable through key board display

Auto/Manual mode

No complicated setting procedure

User friendly interface

Additional Information:

• Item Code: 416STAGE

Product Details:

PNVNSP range of relays provide reliable and high
performance protection. The PNVNSP is a relay for AC Voltage supervision with universal application, it protects the three phase network against over, under voltage, unbalance or earth faults in
isolated networks. Beside the pure RMS value measurement
of the line voltage the PNVNSP evaluates the symmetrical
components (U1, U2 & U0 sequence system). By evaluating
these components relay PNVNSP can detect the phase
sequence, voltage unbalance and earth faults.

Features:

• Numeric DSP technology based relay.
• Two Groups of configuration parameter.
• Off line Trip Test mode
• Single Phase/Three Phase selection
• Front IP54 transparent dust cover

Additional Information:

• Item Code: PNVNSPCS

Product Details:

Features:

• 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
• Tropicalized design using micro controller & Ideal for industrial environment

Applications:

• Monitoring & Supervision of Under and Over voltage in power generating plants &
  distribution system
• To protect Generators & AMF switch boards
• For protection of synchronous & induction motors
• For transformer feeder panel
• Protection for capacitor control panels

Additional Information:

• Item Code: LVM02

Product Details:

All the line voltages are monitored and sensed simultaneously using three independent scale down potential transducer this low level ac signal is subjected to signal condition, which includes surge suppressors and harmonic filter, filtered signal is fed to the ADC of the industrial grade pic micro controller, When the sensing voltage level exceeds the user set value f or under or over voltage, Digital Microcontroller based definite-time under voltage(uv) and over voltage (ov) relay/line voltage monitor(LVM) gives an output signal in the form of relay change over for tripping/alarming.

Features:

• 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
• Low power consumption
• Tropicalized design using micro controller & Ideal for industrial environment 

Applications:

• Monitoring & Supervision of Under and Over voltage in power generating plants & distribution system
• To protect Generators & AMF switch boards
• For protection of synchronous & induction motors
• For transformer feeder panel
• Protection for capacitor control panels

Additional Information:

• Item Code: LVM02A

Product Details:

Features:

• Microcontroller based, hence accurate and precise
• Protection of Generator / Prime movers against reverse power
• Display of reverse power on the LCD
• Continuous display of sensing voltage, current, frequency and power factor with lead/lag indication
• Wide Auxiliary voltage range from 85–275V AC/DC
• Cost effective and highly reliable compact design
• Test Facility, allowing the user to check the NO and NC contacts of the relay

Applications:

• Protection of Generator and Prime Mover/ Turbine.

Specification:

• Out put Relay: 2 C/O,250V, 8A AC 30V, 8A DC
• Operating Temperature: ‐5 deg c to +55 deg C
• Panel cut out: 137 x 137+0.1mm
• Enclosure Dimensions: 144 x 144 x 105 mm

Additional Information:

• Item Code: REVERSEPOWERRELAY

Product Details:

Prok Dvs an ISO 9001:2008 Company indigenously develops the power system protection relays and panel meters for power system. μP based Zero sequence voltage relays are the state of the art design, to monitor and protect the costly equipments against unbalance voltages.
The Relay Continuously monitoring all the three phase Line to Line Voltages, if any abnormal condition persists in the system internal Relay activated with predetermined set value of definite time.
The Unit Displays Line to Line Voltages on LCD display, Healthy and Fault /Trip status Information through LED Display.

Features:

• Accurate and reliable measurement .of residual voltage.
• Display of voltage magnitudes, using 8 character 2 line LCD
• User friendly Setting Parameters through key pad switch
• Wide range for Selection of residual voltage
• User configurable Definite tripping time (DMT)
• Fast tripping response(<500mS) when Phase and Neutral are Interchanged
• Industrial Rugged design in Din rail mounting as well as Panel Mounting.
• Healthy, Trip Status provided through LED visual indications.
• Auto Reset provided on Healthy voltage resumption

Application:

• Voltage Unbalance/Earth fault protection 
• Protection of Equipments/Components against Phase and Neutral Interchange

Additional Information:

• Item Code: MPND

Product Details:

Description:

• Prok dv's make Earth Leakage Relay (ELR) MPEL series uses the state-of-the-art, Digital microprocessor/micro controller based protection device to detect low level leakage due to degradation of insulation of phase conductors or high impedance faults.The main feature of Digital microprocessor/microcontroller Earth Leakage Relay (ELR) continuous display of earth leakage currents of the power system. The unit has immunity to external disturbance like harmonics and transients.

Specification:

• Microcontroller based compact design
• Continuous monitoring and display of set value and measured value of leakage current
• 8 character 2line LCD displays with back lit
• Test & Reset facility
• CBCT connection monitoring facility
• True Rms measurement of leakage current
• Trip Circuit Failure indication (Optional) Default:Disabled
• Serial RS 485 communication port with modbus protocol (optional)
• Fault recording with date and time stampings, max up to 10 Faults (optional)
• Tropicalised and rugged design
• External test, reset, fault & healthy indication suitable for mining Application
• High sensitive leakage current setting (5mA to 1.00A) (MODEL:MPELSPL)

Additional Information:

• Item Code: MPELSPL02

Product Details:

All the line voltages are monitored and sensed simultaneously using three independent scale down potential transducer this low level ac signal is subjected to signal condition, which includes surge suppressors and harmonic filter, filtered signal is fed to the ADC of the industrial grade pic micro controller, When the sensing voltage level exceeds the user set value f or under or over voltage, Digital Microcontroller based definite-time under voltage (uv) and over voltage (ov) relay/line voltage monitor(LVM) gives an output signal in the form of relay change over for tripping/alarming.

Features:

• 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
• Low power consumption
• Tropicalized design using micro controller & Ideal for industrial environment

Additional Information:

• Item Code: LVM03

Product Details:

Prok Dvs an ISO 9001:2008 Company indigenously develops the power system protection relays and panel meters for power system. µP based Zero sequence voltage relays are the state of the art design, to monitor and protect the costly equipments against unbalance voltages. The Relay Continuously monitoring all the three phase Line to Line Voltages, if any abnormal condition persists in the system internal Relay activated with predetermined set value of definite time. The Unit Displays Line to Line Voltages on LCD display, Healthy and Fault /Trip status Information through LED Display.

Technical Specifications:

• Trip Time when Ph. & Neutral interchanged: 500mS ( Approx)
• Auto Reset provided on Healthy voltage resumption
• AUX. Voltage: 85-275V AC/DC Universal input, 50-60Hz
• Display: 8 chars 2 line LCD with backlit
• LED: For Visual indications of healthy & Trip status.
• Mounting: Flush mounting
• Dimensions: FLUSH MOUNTING: 96x96x65 mm (w x h x d) +/- 1mm Tolerance
• DIN MOUNTING: 79x93x73 mm (l x h x b) +/- 1mm Tolerance

Features:

• Display of voltage magnitudes, using 8 character 2 line LCD
• User friendly Setting Parameters through key pad switch
• Accurate and reliable measurement .of residual voltage.
• Wide range for Selection of residual voltage
• User configurable Definite tripping time (DMT)
• Fast tripping response(<500mS) when Phase and Neutral are Interchanged
• Industrial Rugged design in Din rail mounting as well as Panel Mounting.
• Auto Reset provided on Healthy voltage resumption

Additional Information:

• Item Code: DMPND

Product Details:

The PAR type auxiliary relay are voltage operated relays
mainly used in control and alarm circuits.PAR series of relay are available in two basic models PAR-H and PAR-S. Auxiliary relay CAR-H is provided with hand reset contacts. CAR-S is self reset type. PAR series of relays are available in 2-elements & 3-
elements model. Each element can be energized separately.

Features:

• Electro-mechanical design
• Suitable for tripping, signaling in protection and control systems
• Consistent and Repeat accuracy
• High resistance to shock and vibration
• Flexible user friendly standardized contacts arrangement
• Hand reset or self reset contacts
• Hand reset ag indication
• Compact panel mounting case

Design:

• The design of auxiliary relays electromechanical, hinged armature type. It has been ensured to have consistent electrical & magnetic qualities while designing the Armature, Yoke and the core materials. The coil is wound with high thermal rating to withstand the over heating due to continuous rating. Similarly, the contacts have been designed with silver/ cadmium oxide alloy to have superior contact rating with minimum wear and tear. It is ensured in the design and construction that the contact pressure is maximum to ensure superior contact rating. The contact spring is designed with superior phosphor-bronze spring quality material to have the positive exible movements. The relay element is provided with 3 Make and 3 Break contacts. In case of requirement, one Break contact can be connected in series with the relay element as a cut-off contact. This reduces the burden and saves the power from the battery. This facility is available with 1- element relay with Hand reset contacts only. The ag is always reset manual. The relay with self reset contacts can also be provided without ag.

Additional Information:

• Item Code: PAR1to3

Product Details:

Prok dv's make Static Earth Leakage Relay (ELR) with Core Balance Current Transformer ( CBCT
/ ZCT) are used to detect the leakage current in an Electrical Power System. Static Earth
Leakage Relay (ELR) Transmits a signal to activate the trip coil of the MCCB/ACB/OCB
CONTACTOR in the event of Earth leakage, resulting in automatic isolation of the electrical
power system. Static earth leakage relay (ELR) and core balance current transformer (CBCT /
ZCT) have been widely used and accepted because these have field adaptability and are
economic.

Features:

• Consistent reliability with accuracy.
• Fixed or variable current sensitivity by Dip Switch selection
• LED’s for visual indication of fault.
• High Barrier connector at rear for easy termination and safety standards.
• Tamper proof polycarbonate cover in the front.
• Test & Reset Facility for testing healthiness of the relay

Applications:

• Frame Leakage protection for L.T. Control Panels and switch boards.
• Earth Leakage protection for Feeders / Motors / Generators / Transformers / Mobile Operating Equipments.
• Protection for hazardous sensitive environments like Oil Refineries/ Cement Plant/Steel Plant /Chemical Platforms/Pulp industries and General Electrical Distribution.
• Protection for Mining & Control Engineering

Additional Information:

• Item Code: DEL05