Range of MicroLogic Trip Units

Presentation

MicroLogic trip units are used on the ComPact NSX circuit breakers. The range of MicroLogic trip units consists of several families of electronic trip unit:

MicroLogic 1, 2, trip units, without display
MicroLogic Vigi 4 trip units with earth-leakage protection, without display
MicroLogic 5, 6, trip units with display
MicroLogic Vigi 7 trip units with earth-leakage protection, with display

A TM-D, TM-G, or MA trip unit

B MicroLogic 1 or 2 trip unit

C MicroLogic 5 or 6 trip unit

D VigiPacT Add-on for additional earth-leakage protection or VigiPacT Add-on Alarm

E MicroLogic 4 trip unit with integrated earth-leakage protection

F MicroLogic 7 trip unit with integrated earth-leakage protection

Description of the MicroLogic 1, 2, and Vigi 4 Trip Units

MicroLogic trip units are grouped by application. A distinction is made between electrical power distribution applications and motor protection applications:

In the electrical power distribution application:
- MicroLogic 2.2 and 2.3 trip units are designed to protect conductors in commercial and industrial electrical distribution.
- MicroLogic 4.2 and 4.3 trip units with integrated earth-leakage protection are designed to protect electrical conductors, goods, and people in commercial and industrial electrical distribution (MicroLogic 4.2 AL and 4.3 AL trip units with integrated earth-leakage protection are designed to measure earth-leakage current).
In the motor protection application:
- MicroLogic 1.3 M trip units are adapted to short-circuit protection of motor-feeders.
- MicroLogic 2.2 M and 2.3 M trip units are adapted to protecting motor-feeders on standard applications. The thermal tripping curves are calculated for self-cooled motors.

The adjustment dials and indications are on the front face.

For more information about MicroLogic 1, 2, and 4 trip units, refer to DOCA0140EN ComPact NSX - Circuit Breakers and Switch-Disconnectors 100–630 A - User Guide.

Description of the MicroLogic 5, 6, and Vigi 7 Trip Units

MicroLogic 5, 6, and Vigi 7 trip units are available for electrical power distribution applications and motor protection applications:

In the electrical power distribution application, MicroLogic 5.2, 5.3, 6.2, 6.3, Vigi 7.2, and Vigi 7.3 trip units are designed to protect conductors, goods, and people in commercial and industrial electrical distribution.
In the motor protection application, MicroLogic 6.2 M and 6.3 M are adapted to protecting motor-feeders on standard applications. The thermal tripping curves are calculated for self-cooled motors.

MicroLogic 5, 6, and Vigi 7 trip units provide:

Adjustable tripping functions on electronic trip circuit breakers
Protection for the electrical distribution system or specific applications
Metering of instantaneous and demand values
Kilowatt-hour metering
Operating information (such as peak demand values, customized alarms, operation counters)
Communication

MicroLogic trip units can be configured to communicate with other devices. For information on the maintenance and communication modules, refer to the following documents:

LVPED217032EN ComPact NSX & NSXm Catalogue
DOCA0140EN ComPact NSX - Circuit Breakers and Switch-Disconnectors 100–630 A - User Guide

For complete information on available circuit breaker models, frame sizes, interrupting ratings, and trip units, refer to LVPED217032EN ComPact NSX & NSXm Catalogue.

Identification

The product name specifies the protection provided by the trip unit.

Identification on MicroLogic electronic trip units

Examples	Type of protection (X)	Case (Y)	Type of measurement (Z)	Application (T)
–	1 SI 2 LS₀I 4 LS₀IR 5 LSI 6 LSIG 7 LSIR	2 ComPact NSX 100/160/250 3 ComPact NSX 400/630	A Ammeter E Energy	Distribution G Generator AB Subscriber M Motor Z 16 Hz 2/3 AL Alarm without trip for earth-leakage protection
MicroLogic 1.3 M	SI	400 or 630 A	–	Motor
MicroLogic 2.2 G	LS₀I	100, 160 or 250 A	–	Generator
MicroLogic 2.3	LS₀I	400 or 630 A	–	Distribution
MicroLogic 2.3 M	LS₀I	400 or 630 A	–	Motor
MicroLogic Vigi 4.2	LS₀IR	100, 160 or 250 A	–	Distribution including trip on earth-leakage
MicroLogic Vigi 4.3 AL	LS₀I	400 or 570 A	–	Distribution including alarm on earth-leakage
MicroLogic 5.2 A	LSI	100, 160 or 250 A	Ammeter	Distribution
MicroLogic 5.3 E	LSI	400 or 630 A	Energy	Distribution
MicroLogic 6.3 E-M	LSIG	400 or 630 A	Energy	Motor
MicroLogic Vigi 7.2 E-AL	LSI	100, 160 or 250 A	Energy	Distribution including alarm on earth-leakage
MicroLogic Vigi 7.3 E	LSIR	400 or 600 A	Energy	Distribution including trip on earth-leakage
Type of protection: I Instantaneous L Long-time S₀ Short-time (time delay cannot be adjusted)			S Short-time G Ground-fault R Earth-leakage (residual)

In Rating

The trip unit In value is visible on the front face of the circuit breaker when the trip unit is installed. The trip unit In rating (in amperes) is the maximum value of the trip unit.

Example: MicroLogic 5.2 E 250 A trip unit:

Setting range: 100–250 A
In rating = 250 A

Integrating MicroLogic Trip Units on the ComPact NSX Range of Circuit Breakers

MicroLogic trip units for electrical distribution can be used on any ComPact NSX circuit breaker.

The following table indicates configurations available according to the In rating of the distribution trip unit and the circuit breaker size:

MicroLogic In rating	40	100	160	250	400	630
ComPact NSX100	✓	✓	–	–	–	–
ComPact NSX160	✓	✓	✓	–	–	–
ComPact NSX250	✓	✓	✓	✓	–	–
ComPact NSX400	–	–	–	✓ ⁽¹⁾	✓	–
ComPact NSX630	–	–	–	✓ ⁽¹⁾	✓	✓
(1) MicroLogic 2.3 only

MicroLogic 2 M or 6 E-M trip units can be used on any ComPact NSX circuit breaker.

The following table indicates configurations available according to the In rating of the motor trip unit and the circuit breaker size:

MicroLogic M In rating	25	50	80	100	150	220	320	500
ComPact NSX100	✓	✓	✓ ⁽¹⁾	✓ ⁽²⁾	–	–	–	–
ComPact NSX160	✓	✓	✓ ⁽¹⁾	✓ ⁽²⁾	✓	–	–	–
ComPact NSX250	✓	✓	✓ ⁽¹⁾	✓ ⁽²⁾	✓	✓	–	–
ComPact NSX400	–	–	–	–	–	–	✓	–
ComPact NSX630	–	–	–	–	–	–	✓	✓
(1) MicroLogic 6 E-M only (2) MicroLogic 2 M only

MicroLogic 1.3 M trip units can be used on ComPact NSX400 and ComPact NSX630 circuit breakers.

The following table indicates configurations available according to the In rating of the motor trip unit and the circuit breaker size:

MicroLogic 1.3 M In rating	320	500
ComPact NSX400	✓	–
ComPact NSX630	✓	✓

Interchangeability of MicroLogic Trip Units

Onsite replacement of trip units is simple:

No connections to make
No special tools (for example, calibrated torque wrench)
Compatibility of trip units provided by mechanical cap
Torque limited screw provides correct torque (see drawing below)

The simplicity of the replacement process means that it is easy to make the necessary adjustments as operation and maintenance processes evolve.

NOTE: The screw head is accessible when the trip unit is installed, so the trip unit can still be removed.

NOTE: On the ComPact NSX circuit breaker with R, HB1, and HB2 breaking performances the trip units are not interchangeable.

Sealing the Protection

Seal the transparent cover on MicroLogic trip units to prevent modification of protection settings and to prevent access to the test port.

On MicroLogic 5, 6, and Vigi 7 trip units, the keypad can be used and the protection settings and measurements can be read on the screen with the cover sealed.