How To Change Direction Of Rotation On Drives In Vector Mode; Basic Controller Checks - Reliance electric GV3000/SE Instruction Manual

4. Once Self-Tune is completed, the motor will ramp down to a stop, and parameters U.001 (Encoder
PPR) and U.006 (% Motor Magnetizing Current) will be automatically updated. The display will return
to the normal monitor mode. The Self-Tune Enable parameter, U.008, will be updated to "OFF".
5. Parameter U.009 will indicate the Self-Tune result. Refer to Section 6, U.009, for a list of result codes.

Basic Controller Checks

1. Make sure that the controller interlocks installed around the driven machine are operational.
2. Check that any installed motor thermal overload relay or the controller's electronic motor thermal
overload parameter (P.040) is enabled (ON). Verify that the parameter for 'Motor Cooling Type
Selection' P.041 is set to 'FC' for motors with forced cooling or 'nC' for self cooling motors. Verify that
cooling air (blower motor direction of rotating) is flowing.
3. Verify settings of selected ramp 1 or 2 acceleration and deceleration times in seconds from / to zero
to Top Speed U.017 (ramp 1: P.001 / P.002, ramp 2: P.017 / P.018).
- Too short acceleration time may cause the drive to operate in current limit and actual time to
accelerate from zero to maximum speed will be higher than set time.
- Too short deceleration time may cause the intermediate circuit voltage to reach its limit and
therefore the regulator to suspend deceleration as DC Bus voltage is too high and trips with 'HU'
indication.
4. Check the direction of rotation of the motor at preselected FORW/REV direction and reference
polarity.
Important: Forward means clockwise rotation viewing motor drive end, with following conditions:
Phases U,V,W at inverter output in phase with U,V,W of a European type of motor.

How to change direction of rotation on drives in Vector mode:

ATTENTION: DC bus capacitors retain hazardous voltages after input power has been
disconnected. Verify with a voltmeter that the DC bus voltage has dropped below
DC 50 V (approx. 60 sec) before touching any internal components.
voltage check and test points refer to Power Units manual 491327, Section 4.
Failure to observe this precaution could result in bodily injury or loss of life.
The direction of rotation can be altered at a deenergized and locked out drive by switching over any
two motor leads together with two leads of one encoder input channel (e.g. A and A NOT).
Refer to manual 49'1327, Section 3 for encoder connections.
5. Press the START key. The motor should ramp to the pre-set speed at set acceleration rate.
6. While the controller is in RUN mode (the RUN LED is lit), check the display data VOLTS, AMPS, and
Hz and verify that they are correct, also under load condition.
Check the value of motor nominal speed (U.005) as follows, see figure 6-3 on next page:
• Operate the drive at 25% to 75% base speed (best 50%). Make sure that the motor can run both
at no-load and with load between 75% to 125% nominal load. Note motor current and motor
voltage under no-load condition.
• Load the motor X = 75% to 125% and watch the motor voltage on the keypad. Results differ
between cold and hot motor:
Hot motor: U.005 is correct, if motor voltage rises proportionally to motor current to about
Y = 105% of noted no load voltage at motor nominal current. If motor is loaded to X% nominal
motor current, the correct factor Y of motor voltage change is:
Y = 105% * (X%*I
Cold motor: U.005 is correct, if motor voltage drops to 95% of noted no load voltage at motor
nominal current. If motor is loaded to X% nominal motor current, the correct factor Y of motor
voltage change is:
Y = 95% * (X%*I
6 - 26
6 - VECTOR REGULATION MODE
- I ) / (I - I
nom no-load nom
- I ) / (I - I
nom no-load nom no-load
GV3000/SE
)
no-load
)
For DC-bus
49'1329 e