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UBZ-304
NOVATEK-ELECTRO
Reset of energy meters (total, active and reactive) is performed when setting the parameter "Energy RESET" to
"On" (setting to "1" when using RS-232/RS-485 interface). After reset of energy meters, the parameter "Energy
RESET" will automatically switch to "Off" ("0"
–
when reading the parameter via RS-232/RS-485 interface).
5.3 UBZ OPERATION
In describing the operation of UBZ it is assumed that this protection is enabled and all the required sensors are
connected.
5.3.1 UBZ operation before load relay on
5.3.1.1
UBZ operation after energizing (first start-up)
After energizing the indicator displays the device name, the version number of software, the name of the
manufacturer and the operation performed (Fig.5.11).
N o t e
–
the software version number may vary.
Figure 5.11
–
UBZ indicator view after energizing
After 1-2 seconds the indicator will display the values of the measured parameters. What parameters will be
displayed on the indicator it depends on the value of the parameter
“Indicat <Start”:
–
line voltages at
“Ind
i
cat <Start”=”LineU”;
–
the motor operating time, the insulation resistance of the motor and mains frequency at
“Indicat <Start”=
“InsFr”.
Before the load relay enabling UBZ checks the following:
–
the level of stator winding insulation relative to the motor housing (when insulation resistance is less than
500 ± 20 kOhm at “Insulation Mr” =
”5” (1000 ±
50 kOhm at
“Insulation Mr” =
”10”)
the load is not enabled);
–
the quality of the mains voltage: full phase, symmetry, the current line voltage value;
–
correct phase sequence, the lack of their
“coincidence”.
If any of disabling factors, the load relay is not activated, and the display of mnemonics shows the corresponding
message about the fault (Table 5.13) and the led
FAULT
lights up.
In the absence of disabling factors, enabling the load relay is determined by the value of parameter
“Start>Power” (
UBZ operation after energizing):
1) when
“Start>Power” = “StOff”
, the load relay will not be enabled.
To enable the load relay in this case, you should simultaneously press UP and DOWN buttons.
2) when
“Start>Power” = “St>AR”
the load relay will be enabled after ARS time.
3) when
“Start>Power” = “St>2s”
the load relay will be enabled within 2 seconds after energizing.
Simultaneously with the load relay enabling the green led "
Power relay
" lights up.
After you activate the relay and up to the moment of the motor starting (motor start is determined by the excess
of the load current of 120% level of rated current), control and taking action on voltage quality is maintained. If
within no-current pause the disabling factors are appeared, the load relay is deactivated.
UBZ operation when enabled remote control of the motor via RS-232/RS-
485 interface (parameter “MotorOp
RS-
2/5”) is co
nsidered in it. 5.4.9.
5.3.1.2
UBZ operation after shutdown owing to the fault
UBZ operation in this case is similar to the work when first starting, but enabling the load relay does not depend
on the value of the parameter
“Start>Power”.
If after the faul
t ARS is disabled (“AR”="Off"), then with disabled motor start on the front panel (it is determined
by the value of the parameter "MotorOp UBZ") the automatic enabling the motor is impossible up to UBZ turning off.
The action of the parameter “AR” value is
applied to all types of faults except voltage faults. To disable ARS in case
of voltage faults you should use the parameters
“Umax protec”, “Umin protec”, “Uimbal protec”.
5.3.2 UBZ operation after load relay enabling and motor is on
(currents occurrence more than 10% of the
motor rated current)
UBZ provides monitoring for voltage and currents. The load relay is disabled when any protection tripping from
Table 5.13 with the exception of:
–
voltage protection;
–
overcurrent protection with
“Imax<>T” =”Ind” (
in this case, the warning is there, but the load relay is not disabled).
The indicator can display phase currents of motor or group of three (two) parameters selected by the user (Table 3.5).
The group of parameters selected by the user can be displayed constantly
(“Indicat mode” =” Conti”)
or for 15 s, and then
indication of motor currents returns
(“I
n
dicat mode “ = ”>15s”).
5.3.3 Functional relay operation
The functions performed by the functional relay are determined by the parameter
“Relay F mode”.
