UNIVERSAL THREE PHASE MOTOR PROTECTION RELAY UBZ-301

Product Details:

Power (Watts or HP)2.5 – 315 kW (4 – 500 HP)
Motor Voltage415 V AC
Motor BrandAny
PhaseThree Phase
Speed (Rpm)Any
Voltage TypeAC
Operating Voltage (V)320 – 480 V
Number of Poles3 Pole, 4 Pole
ApplicationThree phase LT motor protection with CTs and CBCT
Rated Current (Amps)5A – 50A, 10A – 100A, 63A – 630A settable
Output TypeSPDT (1NO + 1NC) potential free
BrandNOVATEK ELECTRO

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 415V/50Hz AC 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 and 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

Additional Information:

  • Item Code: UBZ-301 (X-XXA)
  • Port of Dispatch: New Delhi, India

TECHNICAL BRIEF:

Nominal line voltage, V

415

Mains frequency, Hz

45-55

Harmonical configuration (nonsinusoidality) of power supply voltage

EN 61000-3-2 (IEC 1000-3-2)

Nominal current range in UBZ-301 5-50А, 10-100A, 63-630A

5-50, 10-100, 63-630

Operating current setting range, % of nominal

±15

Double overload delay adjustment range, sec

10-100

Voltage threshold adjustment range, % of nominal

±(5-20)

Phase imbalance adjustment range, %

5-20

Trip threshold adjustment range for the minimum current, % of nominal

0-75

Automatic reset delay adjustment range ( Тon), sec

0-600

First energization load delay when Тon= 0, sec

2-3

Trip delay for current overload

According to current-time characteristic curve

Trip delay for voltage fault, sec

2

Trip delay for current fault (overload excluded), sec

2

Fixed trip point for leakage current, А

0.5

Insulation resistance threshold, kОhms

500±20

Voltage hysteresis, V

10/17

Heat hysteresis, % of stored-up heat after load de-energization

33

Trip threshold accuracy for current, % of nominal current, not more than

2-3

Trip threshold accuracy for voltage, V, not more than

3

Phase imbalance accuracy, %, not more than

1.5

Operating voltage range, % of nominal one

50-150

Power consumption (under load), VA, not more than

3.0

Maximum switched current of output contacts, A

5

Output contact life:
– under 5A load , operations, no less than

– under 1A load , operations, no less than

100 000
1 000 000

Enclosure:
– apparatus
– terminal block


IP40
IP20

Operating temperature range, °C

from -35 to +55

Overvoltage category

III

Nominal voltage of isolation, V

450

Nominal impulse withstanding voltage, kV

4

Cross section of wires of connection terminals, mm²

0.5-2

Maximal tightening torque of terminals external screws, N*m

0.4

Allowable soil level

II

Weight, kg, not more than

0.200

Case dimensions    4 modules of S-type

Mounting  standard 35 mm DIN-rail

Mounting position  arbitrary

The output contacts specification:

Max. current for
~ 250 V A. C.

Max. power

Max sustained safe voltage ~

Max. current for
U = 30V D.C.

Cosφ = 0.4

3A

2000VA

460V

3A

Cosφ = 1.0

5A

UBZ-301 complies with requirements of IEC 60947-1, ІEC 60947-6-2, CISPR 11, IEC 61000-4-2.