BENSHAW ENHANCED KEYPAD Manual do Utilizador descarregar pdf (Página 82)

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Engineered Medium Voltage Starter Products

Synchronous Starters

Sep SerIeS

Highlights:

The sync motor functions as an induction motor during start up. Once

the motor approaches full synchronous speed, the Redistart DC ex-

citer induces a constant polarity to the rotor causing the motor to lock

into sync. Because the rotor’s ﬁeld is constant and separately excited

there is no slip required to produce torque, as with an induction mo-

tor. This allows the motor to run at synchronous speed.

The Benshaw synchronous package consists of a solid state starter

portion connected to the stator and an SEP (synchronous excitation

package) that is connected to the rotor section in conjunction with a

discharge resistor. This SEP is supplied for brush type and brushless

exciters.

Synchronous Beneﬁts:

The RediStart series solid state starter provides reduced voltage step-

less acceleration and automatic synchronization of three phase AC

synchronous motors. Synchronous motors are utilized for a number

of reasons. They are used in applications that require precise motor

speed. They are used to obtain greater efﬁciencies, and they are used

for facility power factor correction.

Since synchronous motors can be operated at leading power factor,

they are used to correct a facility’s lagging power factor created by all

the other induction motors being operated.

This correction reduces the penalty a customer pays the utility com-

pany for creating poor power factor.

Key Advantages:

• Benshaw synchronous technology

• Solid state synchronous rotor control

• Modular power stack design

for ease of maintenance

• Integral bypass contactor design

• Advanced synchronous motor

protection

• Can be added to existing

equipment

• Can be supplied with MX

or MX

starter control

• Modbus communication

• Conﬁgurable output relays

• Reduced maintenance

• Reduction in size compared to

existing ﬁeld control

• Stepless control

• Reduces inrush while

maintaining torque

• Brush type and brushless control

RATINGS

Horsepower:

20–1500 HP

Overload:

500% for 30 seconds

125% continuous

Starting Torque:

0–100%

Voltage:

200–1000 Vac

Includes discharge resistor

and synchronous excitation

package for brush type and

brushless motor.

Exciter Ratings:

125–250 Vdc

30–120 A

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 131 132

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