ABB Molded Case Circuit Breaker Tmax XT Series Brochure

Overview of ABB Molded Case Circuit Breaker Tmax XT Series

Mainly can be divided into 4 types, including XT1, XT2, XT3, XT4, the frame current can reach up to 250A, and the number of poles of ABB molded case circuit breaker Tmax XT series can be divided into 3 poles and 4 poles, if it is based on the installation method It can be divided into fixed type, plug-in type and withdrawable type. Some models can be equipped with a new generation of thermal magnetic trip or electronic trip protection device, and the two trips can be interchanged at the same time, ABB molded case circuit breaker is suitable for motor protection, energy metering, Neutral line protection, generator protection and any other purpose.

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It is also equipped with a new high-performance electronic trip unit Ekip, which can be installed on Tmax XT2 and Tmax XT4 models of molded case circuit breakers for use. When the green LED light is always on, it indicates that the trip unit is in normal operation. In addition, all Ekip trip units are also specially equipped with another LED light, which is mainly used to indicate abnormal conditions of all protection functions. If you want the Ekip trip unit to communicate with other devices or exchange information, you only need to insert the Ekip Com module into the molded case circuit breaker.

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ABB plastic case circuit breaker Tmax XT series model description

The model description for power distribution is shown in the figure below

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

The model description for motor protection is shown in the figure below

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

ABB Molded Case Circuit Breaker Tmax XT Series Quick Selection

The quick selection table for power distribution is shown in the figure below

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

◆Thermal magnetic release TM is optional: XT1, XT2, XT3, XT4;

TMD means: thermal trip is adjustable, magnetic trip is not adjustable;

TMA means: thermal trip is adjustable, magnetic trip is adjustable.

◆Electronic trip unit EKIP optional: X2, XT4;

I means: one-stage protection (instantaneous short-circuit);

LS/I means: three-stage protection (long overload time delay + short short time delay/instant short circuit);

LSI means: three-stage protection (long overload delay + short short delay + short circuit instant);

LSIG means: four-stage protection (long overload delay + short short delay + short circuit instant + ground fault protection);

N-LS/I means: super large neutral line protection, three-stage protection (overload long delay + short circuit short delay / short circuit instantaneous);

G-LS/I means: generator protection, three-stage protection (overload long delay + short circuit short delay / short circuit instantaneous).

◆Optional power measurement: XT4;

E-LSIG means: four-stage protection (long overload delay + short short delay + short circuit instant + ground fault protection).

Note: * means not applicable to EKIP N-LS/I.

The quick selection table for motor protection is shown in the figure below

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

◆Single magnetic release is optional: XT2, XT3, XT4;

MF means: single magnetic protection, magnetic tripping is not adjustable;

MA means: single magnetic protection, adjustable magnetic trip.

◆Electronic trip unit Ekip

M-I means: single magnetic protection electronic trip unit EKIP is only applicable to ABB molded case circuit breaker XT2 model;

N-LIU means: Motor integrated protection electronic trip unit EKIP (long overload delay + short circuit instant + phase unbalance), suitable for XT2 and XT4 circuit breakers;

M-LRIU means: Motor integrated protection electronic trip unit EKIP (long overload delay + locked rotor protection + short circuit instantaneous + phase unbalance), which is also applicable to XT2 and XT4 models.

Note: * indicates not applicable to EKIP M-I, ** indicates only applicable to EKIP M-I.

Description of ABB Molded Case Circuit Breaker Tmax XT Series Nameplate

The characteristics of the circuit breaker are marked on the nameplates on the front and side of the casing, as shown in the figure below.

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1. Circuit breaker name and performance level*;

2. In: rated current*;

3. Uimp: rated impulse withstand voltage*;

4. Ui: insulation voltage*;

5. Ics: rated operating short-circuit breaking capacity*;

6. Icu: rated ultimate short-circuit breaking capacity*;

7. Ue: Rated working voltage*;

8. Isolation performance*;

9. Reference standard IEC60947-2*;

10. Serial number;

11. Anti-counterfeiting signs;

12. Test button;

13. CE mark;

14. Use category;

15. Reference standard NEMA-AB1;

Note: * represents according to IEC60947 standard.

Structural characteristics of ABB molded case circuit breaker Tmax XT series

◆Double insulation;

◆Reliable operation;

◆Isolation performance;

◆Electromagnetic compatibility;

◆Environmental conditions of temperature and humidity;

◆Anti-shock and vibration;

◆Upper incoming line or lower incoming line;

◆ABB molded case circuit breaker can be installed in a flexible position, horizontally, vertically or lying flat, without derating;

◆ABB molded case circuit breaker does not need to be derated when installed at an altitude of less than two kilometers for use. If it is more than two kilometers above sea level, changes in atmospheric conditions will have a certain impact on equipment parameters, so derating is required. use.

ABB molded case circuit breaker Tmax XT series application range

1. Power distribution protection purpose

From the low-voltage main distribution cabinet to the distribution box of the electrical system, it can be installed and used. Because it has the characteristics of high let-through energy, it also has the current limiting function to protect the load-side loop and equipment. If the thermomagnetic or electronic trip unit is selected, the ABB molded case circuit breaker can play the role of overload, short circuit, ground fault and indirect contact protection in the low-voltage distribution network.

2. Motor protection purpose

When selecting and manufacturing a starting monitoring system for a motor, the safety and reliability of the scheme are important aspects that need to be considered. Therefore, whether it is the motor itself or its power supply system, the starting phase is the most critical period. Even if it enters the normal operating state, it still needs to be properly monitored and protected in order to deal with it in time. Any failures that may occur. Now only need to configure an ABB molded case circuit breaker that integrates all protection and monitoring functions, and a contactor can be used to start and stop the motor, the specific wiring diagram is shown below.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

When selecting operation and protection devices, several factors must be considered, including the electrical characteristics of the motor (type, rated power, efficiency, power factor), the starting type and electrical diagram, and finally the power grid where the motor is located. Part of the fault current and voltage.

3. Purpose of generator protection

The Tmax XT series of ABB molded case circuit breakers can be equipped with thermal-magnetic trips with low magnetic trip thresholds, which effectively provide protection solutions for small generators and distribution networks with long cables. Due to the relatively high cable impedance , And there will be a slight fault current at the end of the cable. Therefore, the generator protection requirement is that the magnetic trip threshold should be very low, usually about three times the rated current of the molded case circuit breaker, to reliably cut off the short-circuit current in the "transient zone" of the generator's fault current attenuation curve.

4. Use of neutral line protection

The Tmax XT series of ABB molded case circuit breakers with neutral line protection are suitable for applications where the neutral line is overloaded due to harmonics, unbalanced load, and single-phase current. Under these conditions, a certain amount of current will flow through the neutral line, especially the third harmonic and related integer multiples of harmonics will be superimposed on the neutral line, resulting in the neutral line current always in a rising state, or even Exceed the phase current. Therefore, in the electrical system where the cross section of the neutral line is larger than the cross section of the phase line, it is necessary to use a molded case circuit breaker with neutral line protection function to provide proper protection for it.

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