GE Industrial Solutions SE150 User Manual

g

Spectra RMS™ Circuit Breakers

Motor-Operated Mechanisms for Spectra RMS™
Breaker Types SE150, SF250

Description

A motor-operated mechanism is designed to open, close,
and reset a circuit breaker by remote control.

In an operating installation, the customer must supply
normally open ON and OFF push-buttons, external wiring,
a control power source, and any control circuitry.

Electrical Operation

With the breaker and operating mechanism in their OFF
positions, press the ON button to energize the motor,
closing the breaker. When the breaker handle reaches the
ON position, the control circuitry is disconnected by an
internal limit switch.

When the OFF button is pressed, the motor is energized,
opening the breaker. After the breaker handle reaches the
OFF position, a limit switch de-energizes the control
circuit.

When the circuit breaker trips automatically, there is no
external trip indication, unless a separate bell alarm
accessory is provided to actuate a warning device. It is
necessary to press OFF to reset the breaker.

GEH-5613 Installation Instructions

Type

SE150

Push to

Open

Automatic Reset

For automatic reset, an auxiliary switch, available as an
accessory, returns the breaker to the OFF/RESET position
after it has tripped. The switch is mounted inside the
breaker and wired in parallel with the OFF button. When
the breaker trips, the switch closes, moving the breaker
handle to the OFF/RESET position. After the motor­operated mechanism has reset the breaker, the limit switch
again opens the circuit. To use automatic reset, the ON
push-button must be SPDT type and wired as in Figure 5.
(The Auto/Reset scheme applies to ac devices only and is
not applicable for dc applications.

Manual Operation

Lift the cover to disengage the handle and operate the
breaker handle. To return to electrical operation, align the
breaker handle with the operating mechanism and close
the cover.

Type

SF250

Figure 1. Spectra RMS circuit breakers.

Electrical Data

Table 1 contains the electrical specifications for the motor­operated mechanism.

Control Timing (Sec)

Catalog

No. Volts

SEMOM1 120 Vac 10.5 5.0

SFMOM1 125 Vdc 13.5 4.0

SEMOM2

SFMOM2

SEMOM8

SFMOM8

SEMOM9

SFMOM9

240 Vac 6.5 3.0

24 Vdc 31 15.5

48 Vdc 20 7.0

In-Rush

Amps

Running

Amps Closing

Opening

Reset

.15 .13

Table 1. Electrical specifications.

Recommended

Fuse

1 Amp

Time Delay

2 Amp

Time Delay

Move Shutter

if Necessary

Mounting

Screws

Installation

WARNING: The circuit breaker must be de-energized

before the motor operator is installed.

1. Mount the circuit breaker using the diagonal

mounting screw locations.

2. Connect the line and load circuit breaker terminals.

3. Install the motor operating mechanism using the

remaining diagonal mounting screw locations,
shown in Figure 2. See Figure 3 for alternate
mounting methods.

4. Align the racking mechanism and the circuit

breaker handle by rotating the lead screw or by
moving the breaker handle. Close the cover.

5. Electrically test the mechanism according to the

specifications in Table 1. Refer to Figure 5 for a
schematic and auto reset diagram.

10-32 x 4.25 Screw (E Frame)

10-32 x 6 Screw (F Frame)

Rotate Lead

Screw Assembly

to Align Racking
Mechanism with

Circuit Breaker

Handle

Type

SF250

Type

SE150

Mounting

Screws

Lock

Washer

Nut

Breaker Supported

by Bus Structure

Figure 2. Mounting the motor-operated mechanism on the breaker.

Flat Washer

Breaker Supported

Figure 3. Breaker mounting methods.