Universal motor protection unit UBZ-304

Code of product:
NTBZ30400
In stock
€223
5 years: product warranties
The device has been tested for operability
Quality confirmed by EU certificates

More Information

Installation method Into a panel
Remote control RS-485/ RS-232
Brand Novatek
Indication Display
Operating method Buttons
Available delivery methods: Pickup from the store, Nova Poshta.
Payment methods: Bank transfer, Cash on delivery.

Detail product Description

The UBZ-304 is designed to protect asynchronous motors with power from 2.5 to 315 kW when using external standard current transformers with an output current of 5 A.

The UBZ-304 can operate in networks with both isolated and solidly grounded neutral.

The device is designed as a panel device.

UBZ provides continuous monitoring of the mains voltage parameters, current values of phase (line) currents of three-phase electrical equipment 400 V 50 Hz and checking the insulation resistance of electric motors

UBZ-304 provides protection of electric motors in the following cases:

  • Low-quality mains voltage (unacceptable voltage fluctuations, phase breakage, phase alternation and phase sticking, asymmetry of phase / line voltages, lowering the mains frequency below the specified one and (or) increasing the mains frequency above the specified one).
  • Mechanical overloads (symmetrical increase in phase/line currents).
  • Threshold exceeding by reverse sequence current.
  • Asymmetry of phase currents without overloading due to insulation failure inside the motor and/or power supply cable (comparison of the reverse current asymmetry factor with the reverse voltage asymmetry factor).
  • Loss of torque on the motor shaft (‘dry running’ - for pumps) - protection by minimum starting and/or operating current.
  • Delayed motor start or rotor blockage.
  • Unacceptably low insulation resistance between the stator and motor housing (check before switching on).
  • Stator winding earth fault during operation - earth leakage current protection.
  • Thermal overload of the motor.
  • Overheating of windings (winding temperature is determined when using temperature sensors built into the motor or the temperature of the housing when using external temperature sensors).

Novatek-electro

Development and development of security devices and automation. 5 years guarantee. Products are constantly available in stock or are released in the shortest possible time.