Delta 36-325C Installation Guide download pdf (Page 40)

Adjustment of the Drive

This parameter can be used to regulate the output voltage in relation to the

rated frequency. With this function active, voltage variations at the input

as well as on the DC bus will have only a small influence on the output

voltage (V/Hz-characteristic). This function can be used to adapt the

output voltage for special motors and can also prevent damage to the

motor resulting from over or under voltage supply.

Adjustment range: 1...650 V (off)

Resolution: 1 V

Factory setting: PSD

Note: Enter-Parameter

In the example below using a motor rated at 230 V / 60Hz, the output

voltage is too high due to our supply being 250 V and CP.17 off. By setting

CP.17 to the correct rated motor voltage of 230 V, the voltage is clamped

thereby giving the motor the correct voltage.

Voltage stabiliza-

tion

When starting the frequency inverter into a spinning motor, an E.OC fault

can be triggered because of the difference between the actual motor

speed and the inverter set speed. By activating speed search, the inverter

searches for the actual motor speed, adjusts its output frequency to

match. It will then accelerate with the adjusted ramp time to the given set

value. During speed search CP.2 displays "SSF". This parameter deter-

mines under which conditions the function will operate. Parameter values

can be selected individually or any combinations.

Example: CP.16=12 means after reset or after auto-restart (E.UP).

Speed search

condition

Adjustment range: 0...15

Resolution: 1

Factory setting: 8

Note: Enter-Parameter

Value Condition

0 Function off

1 Control release enabled ( terminal 16 )

2 Power on

4 After fault reset

8 After auto-restart (reset) E.UP

PSD

(Power Stage

Dependent)

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 55 56

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Delta 36-325C Installation Guide Page 40