~ 5 ~
NOVATEK-ELECTRO UBZ-305
-
extremely low isolation between the stator and the motor housing (pre-startup check);
-
ground fault of the stator winding during operation
– ground leakage current protection;
-
motor thermal overload;
-
overheated windings (temperature of windings is determined using the motor built-in temperature
transmitters or the temperature of the housing when using the external temperature transmitters).
For each type of protection it is possible to have banning and permitting of automatic restarting (hereinafter
referred to as ARS) with load.
UBZ provides for electric equipment protection by means of controlling the coil of the magnetic starter
(contactor).
UBZ detects motor currents when load relay is off (when the load relay is off and functional relay is in star-
delta mode). In this case, UBZ indicates the fault of external contactor starting the motor until UBZ is turned off
or control of motor currents is disabled when load relay is off.
UBZ provides for electric motors control:
- using analog inputs "0-20 mA" and "0-10 V";
- using remote control channels (RS-232 and RS-485 interfaces);
- by buttons on the front panel of UBZ.
Communication
UBZ provides:
- parameters control and transmission by RS-485 interface using MODBUS Protocol,
- parameters control and transmission by RS-232 interface.
Note: Simultaneous use of RS-485 and RS-232 is not possible.
For UBZ operation with PC the program of UBZ-304/305 Control Panel can be used; it is available on the
website of NOVATEK-ELECTRO Company (
http://www.novatek-electro.com/production_ubz.htm
UBZ-304/305 Control Panel program is designed to monitor the status and collect data of the UBZ-305 unit
via RS-232 or RS-485 communication interfaces (MODBUS Protocol). The program allows for saving (loading)
various UBZ settings, retrieving data and save them for further analysis. Data saved can be viewed in the
graphs, comparing the parameters with each other.
Graphic interface of the control panel allows real-time viewing the current status of various UBZ parameters.
The flexible adjustment of interface allows adapting to the needs of any user.
1.2 Operating Conditions
UBZ is designed for operation in the following conditions:
Ambient temperature: from minus 20 to +55
°С;
Atmospheric pressure: from 84 to 106.7 kPa;
Relative air humidity (at temperature of +25
°С): 30 … 80%.
ATTENTION!
The product is not intended for use:
- in conditions of significant vibration and shocks;
- in high humidity conditions;
- in corrosion environments with content in the air of acids, alkalis, etc., as well as severe contamination
(grease, oil, dust, etc.).
If the temperature of the unit after transportation or storage is different from the temperature of the
environment in which its operation is assumed, then before connecting to the mains keep the unit in operation
conditions for two hours (because on the unit elements condensation may be available).
1.3 Changes in the Characteristics and Operation of UBZ Depending on Program Version
If the software version is 5 or less, then changes in UBZ characteristics and operation are not available.
Version 7: metering of total, active and reactive energies is added.
Version 8: integrity control of voltages and currents calibration factors is added.
1.4 Controls and Overall Dimensions
1.4.1. Design
Overall dimensions of UBZ are given in Fig.1.1.
