Universal Remote Control MX-880Z - SPECS SHEET Informazioni Techniche Scaricare il pdf (Pagina 38)

™

Masterpact™ NT and NW Universal Power Circuit Breakers

Accessories

05/2014

Options for Remote Operation

Two options are available for remote operation of Masterpact™ circuit breakers: direct connection or a

communication network.

NOTE: When remote operation features are used, a minimum of four seconds is required for the spring

charging motor (MCH) to completely charge the circuit breaker closing springs prior to actuating the

shunt close (XF) device.

The wiring diagrams for these two options are shown below.

Remote Operation Accessories

The remote ON/OFF function is used to remotely open and close the circuit breaker. It is made up of

the following components:

•

A spring-charging motor (MCH) equipped with a spring-charged limit switch; see page 39 for more

information.

•

A shunt close (XF); see page 40 for more information.

•

A shunt trip (MX1); see page 40 for more information.

Optionally, the function may be completed with:

•

A ready-to-close contact (PF).

•

An electrical closing push button (BPFE).

•

A remote reset following a fault (RES).

The remote operation function may be completed with:

•

Auxiliary contacts (OF).

•

Overcurrent trip switch (SDE).

Figure 8: Wiring Diagram for Remote ON/OFF Function by Direct Connection

Masterpact Circuit Breaker Equipped

for Remote ON/OFF Function

Cluster shield is not shown

Figure 9: Wiring Diagram for Remote ON/OFF Function by Communication Network

NOTE: Induced voltages in the circuit at terminal

C2 and/or A2 can cause the shunt close to not work

properly. The best way to prevent induced voltages

is keep the circuit to terminal C2 and A2 as short as

possible. If it is impossible to keep the circuit less

than 10 feet (3 m), use an interposing relay near

terminal C2 or A2.

NOTE: When communicating MX1 or XF coils are

used, terminal (C3 or A3) must be connected to line

even if the communication module is not installed.

The bypass circuit through terminal C2/A2 is only

momentary duty for 0.5 sec. For continuous duty,

use the communications command.

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 179 180

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Universal Remote Control MX-880Z - SPECS SHEET Informazioni Techniche Pagina 38

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