Novatek UBZ-305 User manual

NOVATEK-ELECTRO LTD
Intelligent Industrial Electronics
UNIVERSAL MOTOR PROTECTION
UNIT
UBZ-305
OPERATION MANUAL
TECHNICAL PASSPORT
The quality management system of production complies with the requirements of
DSTU ISO 9001:2009 (ISO 9001:2008), No. UA 2.032.7110-12
Odessa www.novatek-electro.com

~ 2 ~
UBZ-305 NOVATEK-ELECTRO
CONTENT
1 APPLICATION
4
1.1 General
4
1.2 Operating conditions
5
1.3 Changes in the characteristics and operation of UBZ depending on program
version
5
1.4 Controls and overall dimensions
5
1.4.1 Design
5
1.4.2 Displays and controls
6
2 SPECIFICATIONS
7
2.1 Basic technical specifications
7
2.2 Measured, calculated, special and service parameters
8
2.3 Programmable parameters
10
2.4 Protection functions
16
2.4.1 Protection types
16
2.4.2 Maximum phase current protection
17
2.4.3 Ground fault protection
17
2.4.4 Negative-sequence current protection (imbalance)
17
2.4.5 Minimum phase current protection
18
2.4.6 Delayed start and rotor blocking
18
2.4.7 Thermal overload protection
19
2.4.8 Windings overheating protection
19
2.4.9 Voltage protection
20
2.4.10 Phase sequence protection
20
2.4.11 Network power frequency drop protection
20
2.4.12 Network power frequency rise protection
20
2.4.13 Protection for minimum resistance of motor winding insulation
20
2.4.14 Protection for motor phase (-s) break (loss)
20
2.4.15 Serviceability check of external magnetic starter
20
2.5 Selection of current transformers
20
3 UBZ DESIGN
21
4 SAFETY PRECAUTIONS
21
5 INTENDED USE
21
5.1 Safety precautions
21
5.2 UBZ preparation for use
21
5.3 UBZ control
23
5.3.1 Modes of UBZ control and status
23
5.3.2 Measured and calculated parameters view state
24
5.3.3 Mode of keyboard blocking
24
5.3.4 Mode of minimum number of settings
25
5.3.5 Mode of user level
25
5.3.6 Mode of advanced user level
26
5.3.7 Factory settings
26
5.3.8 Current time setting
26
5.3.9 UBZ faults reset on front panel
27
5.3.10 Energy meters reset
27
5.4 UBZ operation
27
5.4.1 UBZ operation before load relay on
27
5.4.2 UBZ operation after load relay and motor on
28
5.4.3 Functional relay operation
28
5.5 Operation of UBZ together with computer
28
5.5.1 Communication protocol and interface
28
5.5.2 Communication parameters
29
5.5.3 Communication protocol
29
5.5.4 Command codes
30
5.5.5 Control of correct transmission of data packet
32
5.5.6 Register addresses
32
5.5.7 Time parameter registers
33
5.5.8 Communication errors handling
33
5.5.9 Remote control of the motor using RS-232/RS-485 interface
34

~ 3 ~
NOVATEK-ELECTRO UBZ-305
5.5.10 Command for UBZ FAULTS RESET
35
5.5.11 Command for UBZ RESTART
35
5.5.12 UBZ factory settings using MODBUS interface
35
5.6 Emergency conditions system
35
5.7Emergency conditions logbook
37
5.8 Motor control on UBZ front panel
37
5.9 Motor control using analog inputs
38
6 COMPONENTS
38
7MAINTENANCE
38
8TRANSPORTATION AND STORAGE
38
9SERVICE LIFE, SHELF LIFE AND MANUFACTURER WARRANTY
38
10 ACCEPTANCE CERTIFICATE
39
11 CLAIMS DATA
39
Appendix А–Current protection with dependent time delay
Appendix В–UBZ operation for motor control with winding changeover when star-to-delta
starting.

~ 4 ~
UBZ-305 NOVATEK-ELECTRO
This Operation Manual is intended to familiarize you with the unit, the requirements for safety, operation
and maintenance procedures of the universal motor protection unit of UBZ-305 (hereinafter referred to as
UBZ).
ATTENTION!
ALL REQUIREMENTS OF THIS OPERATION MANUAL ARE COMPULSORY TO BE MET!
The product meets the requirements:
UBZ complies with the requirements of the following international standards:
–IEC 60947-1, Low-voltage Switchgear and Control-gear; Part 1: General Rules;
–ІEC 60947-6-2:1992, Low-voltage switchgear and control gear –Part 6-2: Multiple function equipment -
Control and protective switching devices (or equipment)
–CISPR 11:2004, Industrial, scientific and medical (ISM) radio-frequency equipment - Electromagnetic
disturbance characteristics –Limits and methods of measurement
–IEC 61000-4-2:2001, Electromagnetic compatibility (EMC) –Part 4-2: Testing and measurement
techniques –Electrostatic discharge immunity test
Note: The product characteristics comply with both international standards and corresponding national
standards.
Harmful substances in amounts exceeding maximum permissible concentrations are not available.
INSTALLATION, ADJUSTMENT AND MAINTENANCE OF THE UNIT SHOULD BE PERFORMED ONLY
BY SKILLED PERSONNEL WHO THOROUGHLY STUDIED THIS OPERATION MANUAL.
In compliance with the requirements of this Operation Manual and regulations the product is safe
for use.
Abbreviations and terms:
ARS –Automatic restarting;
MS –Magnetic starter;
PC- Personal computer;
CТ - Current transformer;
LCD –Liquid crystal display;
MNS - Minimum number of settings (it is used in phrases as MNS mode or MNS list);
Iсt - Rated current of CT (it is set when external CTs using; e.g., if CТis of Т-0.66 300/5 type, then Iсt
equals to 300A);
In –Rated current of the motor; As a rule, this value of current is indicated on the motor nameplate, but
depending on the operating conditions, the different value of current can be set;
s.c. –short circuit.
1 APPLICATION
1.1 General
UBZ is designed for protection of induction motors with power of 2.5 to 315 kW in case of using the
external standard current transformers with 5A output current.
UBZ can be operated in networks both with insulated and dead grounded neutral.
The unit is of DIN rail design version.
UBZ provides continuous monitoring of mains voltage parameters, current values of the phase (line)
currents of three-phase electrical equipment for 380V, 50Hz, and checking the resistance values of motor
insulation.
UBZ provides protection of electrical motors in case of:
-low-quality network voltage (unacceptable power surges, phase failure, incorrect phase sequence and
phase "coincidence", the imbalance of phase/line voltages, the reduction in the network frequency lower than
the set one and (or) the increase of network frequency higher than the set value);
-mechanical overloads (symmetrical overload in phase/line currents);
-the threshold crossing of the negative-sequence current;
-unbalance of phase currents without overload associated with the insulation fault inside motor and/or
the power cable (the comparison of current unbalance factor according to inverse sequence with voltage
unbalance factor according to inverse sequence);
-the torque failure on the motor shaft ("dry running" for pumps) –protection based on the minimum
starting and/or operating current;
-motor delayed start or rotor blocking;

~ 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.

~ 6 ~
UBZ-305 NOVATEK-ELECTRO
Fig.1.1 –Overall Dimensions of UBZ
1.4.2 Indication and Controls
Controls of UBZ are given in Fig.1.2.
1 –Green LED "Function" is on when functional relay is on;
2 –Green LED “Motor”:
- is on when load relay is enabled;
- flashes if UBZ is within hysteresis band when controlling using analog inputs;
3 –Green LED " " is on when UBZ functional relay operates in start-delta mode (it.2.5.3);
4 –Green LED "TR" is on when UBZ functional relay operates in time-delay relay mode;
5 –Red LED "FAULT":
- when load relay is off: it is on when UBZ is in fault conditions (it flashes if after fault ARS is expected);
- when load relay is on: it flashes when the motor is in conditions of over-current or thermal overload but
relay off time has not come yet;
6 –Blue LED " " is on when data exchange with PC occurs;
7 –Connector for UBZ to a PC via RS-232;
8 –Button (UP) is scrolling of displayed parameters in the parameter view mode and scrolling of the
menu in the parameters setting mode;
9 –Button (DOWN) is scrolling of displayed parameters in the parameter view mode and scrolling of the
menu in the parameters setting mode;
10 –Green LED "MMSP" is on when the relay is in MNS mode;
11 –Button "WR/SEL" is the parameters recording in the setting mode, switching over the group of displayed
parameters in the view mode, reset;
12 –Button "SETUP" turns on the parameters setting mode;
13 –Red LED "SETUP" is on when UBZ is in the mode of parameters setting;
14 –LCD. Fig.1.2–Controls of UBZ

~ 7 ~
NOVATEK-ELECTRO UBZ-305
2 SPECIFICATIONS
2.1 Basic Technical Specifications
Basic technical specifications of UBZ are given in Tables 2.1 and 2.2; specifications of contacts of built-in
relays are shown in Table 2.3.
Table 2.1 –General Data
Table 2.2 –Technical Specifications
Description
Value
Operating supply voltage, three-phase
380 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);
- input to connect temperature transmitter of PTC-1000 type;
- three analog inputs for standard CT with 5A output (T-0.66 type or similar);
- input to connect differential current transformer (zero sequence transformer);
- input to measure current of 0-20 mA;
- input to measure voltage of 0–10 V.
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), not more, VA
5.0
Weight, not more, kg
0.34
Overall dimensions (Fig.1.1), H*B*L, mm 91*157*58
Position in space free
Housing material self-extinguishing plastic
Description
Unit of
measure-
ment
Value
Application of the unit
-
Switchgear and control-gear;
induction motor protection control;
Design (installation) type
DIN rail 35 mm
Protection level
-
IP20
Climatic version
UHL 3.1
Operating temperature range*
°С
from minus 20 to +55
Contamination level
II
Overvoltage category
II
Rated voltage of insulation
V
450
Rated impulse withstand voltage
kV
2.5
Electric shock protection class
II
Wire cross section for connection to terminals
mm2
0.5-2
Torque for terminal screws
N*m
0.4
*Note: It is allowed UBZ operation at temperatures from minus 35 to minus 20°С; in this case the readings on
display can be not available.

~ 8 ~
UBZ-305 NOVATEK-ELECTRO
Table 2.3 –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 = 0.4
Cos = 1.0
5А
16А
100
100
4000 VА
440/300 V
5 А
Load relay
Cos = 0.4
Cos = 1.0
2А
8А
100
100
2000 VА
460 V
3 А
2.2 Measured, calculated, special and service parameters
Special and service parameters are intended only for transmission using MODBUS interface
(RS-485/RS-232). Special and service parameters are given in Table 2.4.
Measured and calculated parameters the values of which are displayed on LCD display, limits of their
measurements and accuracy are given in Table 2.5.
Parameter values can be transferred to PC connected to one of the UBZ interfaces (MODBUS, RS-232).
Parameter addresses are indicated in Table 2.5.
Table 2.4 –Special and Service Parameters
Measurement functions
Range
Remarks
Address
Heat balance of the motor
Read-only parameter of
RS-232, RS-485 interface
The number 1100000 corresponds to 100% of
accumulated heat at which the motor is switched off
when the thermal overload protection is enabled (it
2.4.7)
Read-only
parameter
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 number of
faults will reach 50, the count of faults will begin again
from scratch.
Read-only
parameter
75
Table 2.5 –Measured and Calculated Parameters
Measurement functions
Range
Accu-
racy
Mnemonic
Address
Data transfer
units
Currents
Effective values of phase currents, A
0.5 –
6300
2%
Phase i1
Phase i2
Phase i3
30,
31,
32
The tenth of
amperes.
When working
with measuring
transformers
with rated
current over
100A, the
currents
(measured and
calculated) in
addition to the
zero sequence
current (ground
fault) are
transferred via
RS-232/RS485
in amperes.
Effective value of positive-sequence current, A
0.5 –
6300
2%
Positive si
33
Effective value of zero-sequence current, A
0.3 –20
2%
Earth i0
34
Negative-sequence current (imbalance), A
0.2 –200
5%
Revers si
35
Average current per each phase during the time
specified in the parameter "Tm average I"
Average i1
Average i2
Average i3
36,
37,
38
Maximum value of the average current for each
phase obtained since the last download.
Reset of all average values is performed by the
button WR/SEL in case of displaying the
maximum value of average current in any
phase (by indication of the present average
current of the respective phase).
<3 Iсt
> 3 Iсt
2%
10%
Peak i1
Peak i2
Peak i3
39
40
41
Motor starting current (average phase current)
Overload current (average phase current)
Starting time, s
Starting time is the period of time from when all
three-phase current will exceed 1.2 In and up to
the moment when three currents will drop lower
than 1.2 In. Maximum phase current achieved
during this period is the maximum starting current.
<3 Iсt
> 3 Iсt
0.1 –600
2%
10%
Start i
Overload i
Start time
42
43
44
Voltage
Effective values of phase voltages (determined
when connecting the neutral conductor to UBZ), V
100 –
300
3V
Phase U1
Phase U2
45
46
Volt

~ 9 ~
NOVATEK-ELECTRO UBZ-305
Table 2.5 (Continued)
Measurement functions
Range
Accu-
racy
Mnemonic
Address
Data transfer
units
Phase U3
47
Volt
Effective values of line voltages, V
100 –
475
5V
Line U1
Line U2
Line U3
48
49
50
Volt
Positive-sequence voltage, V
100 –
300
3V
Positive sU
51
Negative-sequence voltage, V
3 –300
3V
Revers sU
52
Zero-sequence voltage (vector sum of three
phase voltages divided by three), (it is defined
when connecting to the neutral wire of UBZ), V
3 –100
3V
Zero sU
53
Miscellaneous
Time counter of motor operation, day
0 –999
Time
motor
54
Motor insulation resistance1, MOhm
0 –19.9
10%
Insulation
55
Hundreds of
kOm
Mains frequency, Hz
45 –65
1%
Frequency
56
Tenths of Hertz
Hold time before automatic restart2, s
0 –900
1 s
End of AR
57
Second
Time to overload trip (it indicates the time
remaining until shutdown made by thermal
overload protection)3, s
0 –600
1 s
Before
OvL
58
Second
Waiting time after overload trip (it indicates
waiting time before permit to start-up blocked
by thermal overload protection)3, s
0 –900
1 s
After OvL
59
Second
Full power4, kVA
0 –5000
5%
Apparent P
60, 61
Dozens of
Watts
Active power4, kW
0 –5000
5%
Active P
62, 63
Reactive power4, kVAr
0 –5000
5%
Reactive P
64, 65
Cosine of angle between voltage and phase
current L1
0 –1
5%
Cos A
66
Cosine of
angle between
voltage and
current *1000
Cosine of angle between voltage and phase
current L2
0 –1
5%
Cos B
67
Cosine of angle between voltage and phase
current L3
0 –1
5%
Cos C
68
Temperature of transmitter 15, °C
minus 40
–80
1°C
Temp
dat 1
69
5000 –
transmitter is
off
1000+-10 –
s.c. of
transmitter
2000+-10 –
transmitter
breakout
Temperature of transmitter 25, °C
minus 40
–220
1°C
Temp
dat 2
70
Current value at analogue input "4-20 mA", mA
0 –25
2%
Input i
71
Voltage value at analog input "0-10 V", V
0 –10
2%
Input U
72
Full electric power6, kVA/h
0 –
200000000
5%
ApE
90
91
Active electric power6, kW/h
0 –
200000000
5%
AcE
92
93
Reactive electric power6, kVAr/h
0 –
200000000
5%
ReE
94
95
Notes:
1If the insulation resistance of the motor is more than 20 MOm, then the value indicator displays code
“>20M“.When the motor is running (energized motor) the insulation resistance is not defined and the code
indicator displays “---“(when measuring circuit of motor insulation connecting).
2If ARS is disabled, the indicator displays “not”.
3If the time before shutdown by thermal overload protection or waiting time before permit to start-up is not defined
(more than 900 s), then the value indicator displays code “undef“. If the protection function is disabled, the
indicator displays “not”.
4If the power consumed by the load is more than 999 kW (kVA, kVAr), the values of power are displayed with MW
(MVA, MVAr).
5If the temperature value exceeds specified limits, then the indicator displays the alarm code in accordance with
table 5.12. If the temperature sensor is disabled by software, then the indicator instead of temperature values
displays “Off”.
6In excess of the energy meter of the value 200 000 000, the counter is reset and the energy metering will start
from zero. Recording the current values of the energy in the non-volatile memory is performed every 15 min.

~ 10 ~
UBZ-305 NOVATEK-ELECTRO
2.3 Programmable Parameters
Programmable parameters and their variation limits are given in Table 2.6.
Table 2.6 –Programmable Parameters
Settings and readings
Parameter
on LCD
Min.
value
Max.
value
Factory
setting
Message on LCD, actions
Address
Set the current time
Real Time
Setting of current time and date
(it. 5.3.8)
See Table
5.9
Transformers
Rated output current of
used CT, A
CT out i
1
5
5
151
Rated current of CT, A
CT nom i
20
800
100
152
Basic parameters
Rated current of motor,
A
Rated
Inоm
0
630
0
0 –current is not set: UBZ will not
enable the load relay (it.5.2.7).
150
Time during which the
average current is
measured, s
Tm
average i
10
600
60
Time during which the average
current is measured (parameters:
"Average i1", "Average i2",
"Average i3" of Table 2.4).
153
Over-current protection
Type of over-current
protection
Type
Imax
0
5
0
0 –"Indep" - protection with
independent time delay.
Types of protection with
dependent time delay:
1 –"SIT" ; 2 –"VIT (LTI)";
3 –" EIT"; 4 –"UIT"; 5 –"RI".
154
Actuation setting for
over-current protection,
repetition factor
Imax coef
0.8
9
4
Repetition factor is set relative to
rated motor current (it is used at
"Type Imax" = "indep").
155
Current protection delay
tripping, s
Imax delay
0.3
600
10.0
156
Permit for protection
operation
Imax
protec
0
2
2
0 –"Off" –protection is off;
1 –"OnnAR" –protection is on,
ARS after tripping is disable;
2 –"On AR"- protection is on,
ARS is enabled.
157
Sequence of tripping
relative to overheating
protection
Imax<>T
0
1
1
0 –"On" –tipping regardless of
overheating protection;
1 –"Ind" –if there is no
overheating, then over-current
indicating displays but load relay
is not disabled.
158
Ground fault protection (for zero-sequence current –I earth)
Over-current tripping
setting, A
I earth
tresh
0.3
10
0.5
If the parameter is not included in
MNS mode list, then default value
is:
0.5 at In<=50A;
1.0 at In>50A.
159
Tripping delay, s
I earth
delay
0.3
2
1
160
Permit for protection
operation
I earth
protec
0
2
2
0 –"Off" - protection is off;
1 –"OnnAR" - protection is on,
ARS after tripping is disable,
2 –"On AR"- protection is on,
ARS is enabled.
161
Negative-sequence current protection
Actuation setting, %
I2 rev
tresh
5
20
10
It is set as percentage of rated
current.
162
Tripping delay, s
I2 rev delay
0.3
10
5
163
Permit for protection
operation
I2 rev
Protect
0
2
2
0 –"Off" - protection is off;
1 –"OnnAR" –protection is on,
ARS after tripping is disable;
2 –"On AR"- protection is on,
164