UNIVERSAL THREE PHASE MOTOR PROTECTION RELAY UBZ-301
Product Details:
| Power (Watts or HP) | 2.5 – 315 kW (4 – 500 HP) |
| Motor Voltage | 415 V AC |
| Motor Brand | Any |
| Phase | Three Phase |
| Speed (Rpm) | Any |
| Voltage Type | AC |
| Operating Voltage (V) | 320 – 480 V |
| Number of Poles | 3 Pole, 4 Pole |
| Application | Three phase LT motor protection with CTs and CBCT |
| Rated Current (Amps) | 5A – 50A, 10A – 100A, 63A – 630A selectable |
| Output Type | SPDT (1NO + 1NC) potential free |
| Brand | NOVATEK 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 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 | Max. power | Max sustained safe voltage ~ | Max. current for | |
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.