Schneider Electric NSX400-630 MicroLogic 4.3 Trip Units User Manual

: June 1, 2024
: Schneider Electric

NSX400-630 MicroLogic 4.3 Trip Units

ComPacT™ NSX400-630

MicroLogic 4.3 Trip Units
DOCA0187EN

Retain instruction sheet for future use.
Visit our website at www.se.com
to download the documents listed above
(user guides or instruction sheets )
and other documents.

PLEASE NOTE

Electrical equipment should be installed,
operated, serviced, and maintained only by
qualified personnel.
No responsibility is assumed by
Schneider Electric for any consequences
arising out of the use of this material.
p All pertinent state, regional, and local
safety regulations must be observed when
installing and using this product.

DANGER

HAZARD OF ELECTRIC SHOCK,

EXPLOSION OR ARC FLASH

Apply appropriate personal protective
equipment (PPE) and follow safe electrical
work practices. See NFPA 70E, CSA Z462,
NOM-029-STPS or local equivalent.
This equipment must only be installed and
serviced by qualified electrical personnel.
Turn off all power supplying this
equipment before working on or inside
equipment.
Always use a properly rated voltage
sensing device to confirm power is off.
Put back all devices, doors, and covers
before turning on power to this equipment.
Beware of potential hazards, and carefully
inspect the work area for tools and objects
that may have been left inside the
equipment.
Failure to follow these instructions will
result in death or serious injury.

WARNING: This product can expose
you to chemicals including lead and
lead compounds, which are known to
the State of California to cause cancer
and birth defects or other reproductive
harm.
For more information go to
www.P65Warnings.ca.gov.

HAZARD OF ELECTRIC SHOCK,

EXPLOSION OR ARC FLASH

Do not install a MicroLogic 4.3 trip unit on a
network with a voltage above 440 Va.
Failure to follow these instructions will
result in death or serious injury.

WARNING

ABSENCE OF EARTH-LEAKAGE

PROTECTION

Do not use MicroLogic 4.3AL trip units to
protect your equipment against
earth-leakage faults. These trip units only
indicate the presence of an earth-leakage
fault.
Failure to follow these instructions can
result in death, serious injury, or
equipment damage.

1 Required for Installation

installation

2 Before Working on Equipment

Turn off all power supplying this
equipment before working on or inside
equipment.
Use push-to-trip button to trip the device.
Use a properly rated voltage
sensing device to confirm power is off.

WARNING

HAZARD OF FIRE

When installing the MicroLogic trip unit,
check that the snap-off screws break
when tightened.
It is mandatory to use snap-off screws
LV429513 to install a MicroLogic trip unit.
In case of replacement of the trip unit by
a trip unit with a different rating, you must:
re-define the trip unit settings
adapt the connection characteristics.
Failure to follow these instructions can
result in death, serious injury, or
equipment damage.

1. Loosen and remove screws of front
cover or accessories as indicated in
instruction sheet shipped with device.
2. Install the trip unit into compartment.

screw guide

DANGER

HAZARD OF ELECTRIC SHOCK,
EXPLOSION OR ARC FLASH
Put back front cover or accessories before
energizing device to prevent access to live
terminals.
Failure to follow these instructions
will result in death or serious injury.

NOTICE

HAZARD OF EQUIPMENT DAMAGE

Be careful not to pinch wires when
installing front cover.
Tighten all front cover screws to stated
torque.
Do not over torque screws.
Do not use power equipment to torque
screws.
Failure to follow these instructions can
result in equipment damage.

Put back front cover and accessories
as indicated in instruction sheet
shipped with device.
Device is ready to be placed in
service.

WARNING

LOSS OF EARTH-LEAKAGE
PROTECTION
Earth-leakage protection is inhibited when
the IΔn dial is in the OFF position.
Failure to follow these instructions can
result in death, serious injury, or
equipment damage

assemble guide

WARNING

LOSS OF EARTH-LEAKAGE
PROTECTION
The dial must be in position while the
circuit breaker is in use.
Failure to follow these instructions can
result in death, serious injury, or
equipment damage.

NOTICE

HAZARD OF TRIP UNIT DETERIORATION

Turn the dial to the Test position
when performing a dielectric test.
Turn the dial back to the original position
after the dielectric test.
Do not close the transparent cover during
the dielectric test.
Failure to follow these instructions can
result in equipment damage.

diel electric

After the dielectric test.

After performing a dielectric test, carry
out an earth-leakage test, see pages
11, 12 and 13.

7 Earth-Leakage Protection Test

DANGER

HAZARD OF ELECTRIC SHOCK,
EXPLOSION OR ARC FLASH
Take all measures necessary to avoid the
risk of electrocution when the external
power supply voltage is greater
than 30 Va.
Failure to follow these instructions will
result in death or serious injury.

Press the test button to simulate an fr es
earth-leakage fault, which allows the
differential protection function to be
tested.
This test is mandatory before
commissioning.
Periodic test: In case of absence of
local regulation, Schneider Electric
recommends that the test is carried
out (1) every 3 months or (2) once a
month for devices in corrosive or
harsh environment.

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