GE C11, AF-300 manual Built-in Options, 2-1 External Options

Models: C11 AF-300

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10 Options

10-1 Built-in Options

There is an optional built-in card for RS485 RTU serial communication. Ask at the distributer for details.

10-2 External Options

 

Table 10-2-1 External Options

 

 

Molded case circuit

The molded case circuit breaker (MCCB) is connected for protecting the main

breaker

circuit wiring to the drive and for turning power on and off. The rated current or

 

the rated interrupting capacity varies according to the power supply specific a-

 

tions.

For input power-factor

This is connected in the following cases.

correcting

When the power transformer capacity is more than 500 kVA.

AC reactor (ACR)

When the imbalance ratio between phases of source voltage exceeds 2% (The

DC reactor (DCR)

value is equivalent to our conventional allowable value.)

 

Maximum voltage [V] - Minimum voltage [V]

 

Imbalance ratio between phases = ——————————————————— x 67 [%]

 

Average voltage among three phases [V]

 

To reduce input harmonic current

 

The input power factor is improved to 0.75 to 0.85 (ACR).

 

The input power factor is improved to 0.9 to 0.95 (DCR).

 

If there is a thyristor load in the same power supply, if the capacitor for power-

 

factor correcting is turned on or off, or if the surge voltage in the power supply is

 

large (ACR only)

 

* The AC reactor is unnecessary when the DC reactor is used.

Magnetic contactor

The drive can be operated without connecting the magnetic contactor. When the

(MC)

drive protective function is activated, this should be connected to turn off the

 

power for safety.

Surge absorber

This is connected to suppress the surge generated by the exciting coil when

 

switching on or off the magnetic contactor and the control relay.

 

 

Reactor for radio noise

This is used for noise suppression when the drive causes excessive noise in a ra-

suppression

dio or electronic equipment around the drive.

Frequency setting POT

This is connected when the frequency is set from the control circuit terminal us-

(VR)

ing drive power.

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Page 89
Image 89
GE C11, AF-300 manual Built-in Options, 2-1 External Options