Among the wiring equipment shown in the above table, the magnetic contactors (MC) and overload relays (THR) are new models of the TeSys series. When using old models of the Mighty J series, refer to the following comparison table that shows consistency between models of the two series.

Magnetic contactor (MC)

Overload relay(THR)

Mighty J series

TeSys series

Mighty J series

TeSys series

C11J

LC1D096

T13J

LR3D076

LR3D166

 

 

 

C13J

LC1D126

T20J

LR3D216

C20J

LC1D186

T35J

LR3D226

LR3D326

 

 

 

C25J

LC1D256

T65J

LR3D356

C35J

LC1D326

 

 

C50J

LC1D386

 

 

LC1D506

 

 

 

 

 

C65J

LC1D656

 

 

C80J

LC1D806

 

 

C100J

LC1D956

 

 

9. 2. Installation of electromagnetic contactor

When the inverter is used without electromagnetic contactor (MC) in the primary circuit, use the MCCB (with voltage tripping device) to make the primary circuit open when the inverter protection circuit is in operation.

When the damping resistor/damping resistance unit is used, install the electromagnetic contactor (MC) or fuseless circuit breaker with power tripping device in the temporary power supply circuit of the inverter so that the power circuit becomes open by operation of the error detection relay (EL) built in the inverter or externally installed overload relay.

■Electromagnetic contactor in the primary circuit

If an electromagnetic contactor is installed in the power supply circuit of the inverter, it prevents the inverter from power failure, tripping of overload relay (Th-Ry), cutout of the inverter protection circuit after its operation, and double starting.

If the FL contact of the error detection relay built in the VF-A7 is connected with the operation circuit of the primary electromagnetic contactor (MC), the MC is tripped when the inverter protection circuit is actuated.

MCCB

MC

VF-A7

 

Power

supply

 

 

 

ST

 

 

 

 

 

 

CC

Example of electromagnetic contactor connection in primary circuit

Moter

IM

Operation preparation Forward

Reverse

I-3

Page 191
Image 191
Toshiba VF-A7 Installation of electromagnetic contactor, Electromagnetic contactor in the primary circuit