Novatek Electro India Private Limited
Novatek Electro India Private Limited
Patparganj Industrial Area, Delhi
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Numeric Motor Protection Devices

We are offering Motor Protection Devices with Numeric Relay Functions. Designed for continuous monitoring of three phase equipment operation parameters: mains voltage, phase/line RMS currents, wattage, positive and negative sequence voltages and currents, isolation resistance to frame, differential ground leak currents (zero sequence currents), temperature operation modes.

Universal Motor Protection Relay

Universal Motor Protection Relay
  • Universal Motor Protection Relay
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Product Details:

Voltage TypeAC
Voltage (V)415 V
Number of Poles3 Pole, 4 Pole
Current (Amps)5A to 630A
ApplicationProtection of three phase motors, pump motors

Universal Protection Devices For Asynchronous Electric Motor. UBZ-301 universal electric motor protection unit (further referred to as the unit) is designed for continuous monitoring of the circuit voltage parameters and phase/line RMS currents of three-phase 380V/50Hz electrical equipment, primarily, of induction asynchronous motors (EM) with wattage rating from 2.5kW up to 315 kW, as well as those with isolated neutral line. Three device versions are manufactured, with differentiation by current ratings: UBZ-301 5-50A UBZ-301 10-100A UBZ-301 63-630A The unit provides full and effective protection of electrical equipment by de-energizing and/or disabling its start in the following cases: when the mains voltage is of poor quality (unallowable voltage surges, phase loss, incorrect phase sequence and phase
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Additional Information:

  • Item Code: UBZ-301
  • Port of Dispatch: New Delhi
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Numeric Motor Protection Device

Numeric Motor Protection Device
  • Numeric Motor Protection Device
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Product Details:

Voltage TypeAC
Voltage (V)380 - 415 V
Number of Poles3 Pole, 4 Pole
Current (Amps)5A to 630A
ApplicationThree phase motor protection, numeric relay functions.

The UBZ-304 Numeric electric motor protection device is designed for protection of asynchronous LT motors having power of 2.5 to 315 kW (5A - 630A), with use of external standard current transformers having output current of 1 ampere or 5 amperes (selectable), works in power mains with isolated neural or with solidly grounded neutral terminals.

 

The device provides continuous monitoring of the mains voltage parameters and RMS phase/line currents of the three-phase electric equipment of 380V-415V 50Hz, as well as for the motor insulation resistance test. More than 90 parameters can be programmed/customised depending on application & usage with variable trip delay and auto-reset delays. Four line full function backlit LCD display provides all information and eases programming from front panel. Built In RS-232 & RS-485 Modbus communication for DCS/ SCADA integration, realtime monitoring, programming and remote control. Device comes with free PC software for realtime monitoring & programming. Universally accepted flush mounted 96 x 96 x 78.3mm overall dimensions.

 

The UBZ provides electric motor protection in the following cases:


  • when the mains voltage is of poor quality – voltage fluctuations & surges, phase loss (single phasing), wrong phase sequence and phase "coincidence" (short circuits) and phase/line voltage imbalance (asymmetry).
  • when mechanical overloads/symmetrical phase/line current overloads occur (over current).
  • when reverse sequence of the current threshold occurs.
  • when phase current imbalance (without overload) occurs that is induced by the insulation fault inside the motor and/or the lead cable (current imbalance factor compared to voltage imbalance factor based on negative sequence).
  • when motor torque is lost ("dry run" for pumps). The unit provides protection based on the minimum start and/or operating current.
  • when start delay or rotor locking/locked rotor condition occurs.
  • when insulation level between the fixed coil (stator) and frame is abnormally low (insulation resistance test before motor start).
  • when stator winding ground fault takes place during operation, the UBZ unit activates ground leakage current protection.
  • when motor thermal overload takes place (calculated in terms of current sqare x resistance x time).
  • when winding overheating occurs (winding temperature measured by integrated temperature sensors, or frame temperature measured by external temperature sensors).
  • when over & under frequency fault occurs.


For each type of protection, it is possible to permit and prohibit the load automatic reset. The unit provides for electric equipment protection by means of a magnetic starter (contactor) coil control.

 

The unit determines load currents when the load relay is open with the open load and programmable relays in the star-delta mode). In this case, the unit shall indicate the fault of an external contactor, which is starting the motor until unit deactivation.

 

Communication:


  • control and parameters transfer via RS-485 interface according to MODBUS protocol
  • control and parameters transfer via RS-232 interface

 

Documentation for this device

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Additional Information:

  • Item Code: UBZ-304
  • Port of Dispatch: New Delhi
Yes! I am Interested
View PDF

Numeric Motor Protection Device

Numeric Motor Protection Device
  • Numeric Motor Protection Device
Ask For Price

Product Details:

Voltage TypeAC
Voltage (V)380 - 415V
Number of Poles3 Pole, 4 Pole
Current (Amps)5A to 630A
ApplicationThree phase AC motor protection
Power (Watts or HP)3.5HP to 500HP
Motor Voltage380 - 415V AC
Motor BrandAny
PhaseThree Phase
Speed (Rpm)Any

Universal Protection Units For Asynchronous Induction Electric Motor

 

The unit is designed for continuous monitoring of three-phase electrical equipment parameters (primarily 3-phase asynchronous induction electro motors) mains voltage, phase/line RMS currents, wattage, positive and negative sequence voltages and currents, isolation resistance to frame, differential ground leak currents (zero sequence currents), temperature operation modes. The unit has been designed for wide range of applications in the buildings engineering systems (heating, ventilation, water supply, air-conditioning), Automatic Process Control Systems and industrial automation systems, systems of control, accounting and scheduling.

 

The unit allows reducing significantly the probability of 3-phase electrical equipment failure, reducing the operation cost, optimizing the energy consumption and enhance the using convenience.

 

It is equipped with complete set of protections implemented in UBZ-301 version. It additionally provides protection against long lasting start and rotor blockage, as well as motor winding overheating monitoring with use of temperature sensors.

 

Availability of another output relay allows for an additional operation mode:

 

  • Star-delta switching
  • Delayed start power-on (for example, cascade motor energizing)
  • Remote signaling system relay


Documentation for this device

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Additional Information:

  • Port of Dispatch: New Delhi
Yes! I am Interested
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Debashish Ghosh (Director)
C - 30, Patparganj Industrial Area F.I.E.
Delhi -110092,India


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