Product Details:
| Power (Watts or HP) | 2.5 – 315 kW (4 – 500 HP) |
| Motor Voltage | 380 – 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 |
| Rated Current (Amps) | 5A to 630A programmable |
| Output Type | Functional – SPDT (1NO + 1NC) and Power – DPDT (2NO + 2NC) |
| Brand | NOVATEK ELECTRO |
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 5 amperes (secondary), 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.
UBZ performs the following protection types for electric motors:
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:
Additional Information:
Technical Specifications | Value |
Operating supply voltage, three-phase | 415 V, 50 Hz |
Mains frequency, Hz | 48-62 |
Rated current of CT, A | 5 |
(Phase/line) voltage hysteresis, V | 10/17 |
Heat hysteresis, in % of accumulated heat in case of shutdown | 33 |
Determination accuracy of trip threshold for current, not more, in % of rated value | 2 |
Determination accuracy of trip threshold for voltage, not more, V | 3 |
Determination accuracy of out-of-phase voltage, not more, V | 3 |
Voltage when maintaining serviceability: – phase voltage, when powered by one phase and zero wire is connected, not less, V – line voltage, when powered by three phases, not more, V |
180 450 |
Analog inputs: – input to connect temperature transmitter (types: Pt100, Ni100, Ni120), pc.; – input to connect temperature transmitter of PTC-1000 type, pc.; – three analog inputs for standard CT with 5A output (T-0.66 type or similar), pc.; – input to connect differential current transformer (zero sequence transformer) pc.; – input to measure current of 0-20 mA, pc.; – input to measure voltage of 0–10 V, pc.. |
1 1 3 1 1 1 |
Main outputs: – load relay – two groups of changeover contacts to control the electric motor starter – 8 A, 250 V at cos φ=1; – functional relay – one group of changeover contacts – 16A, 250V at cos φ=1 (function of the relay is set by the user). |
|
Permit according to temperature of temperature transmitters, °С | 1 |
Power consumption (under load), VA, not more | 5.0 |
Weight, not more, kg | 0.34 |
Overall dimensions (Fig.1.1), H*B*L, mm 110*96*88,3 Position in space free Housing material self-extinguishing plastic | |
Characteristics of built-in relay output contacts:
Relay | Max. current at U~250V | Number of actuations х1000 | Max. switching power | Max. continuous boosting AC / DC voltage | Max. current at Ucont=30V |
Functional relay Cos ф = 0.4 Cos ф = 1.0 |
5А 16А |
100 100 | 4000 VА | 440/300 V | 5 А |
Load relay Cos ф = 0.4 Cos ф = 1.0 |
2А 8А |
100 100 | 2000 VА | 460 V | 3 А |
Special and Service Parameters:
Measurement functions | Range | Remarks | Address |
Heat balance of the motor
| The number 1100000 corresponds to 100% of accumulated heat at which the motor is switched off when the thermal overload protection is enabled (it 3.4.7) | Read-only parameter of RS-232, RS-485 interface | 73,74 |
Index of the last fault in the fault logbook | It varies from 0 to 49, increasing by one after recording another fault in the fault logbook. When the quantity of faults will reach 50, the count of faults will begin again from scratch. | Read-only parameter | 75 |
UBZ complies with the requirements of the following international standards:
Note: The product characteristics comply with both international standards and corresponding national standards.
