TXCM1LE Molded Case Circuit Breaker (CM1LE MCCB switch) is one of the new breakers which have been designed and developed by the company using international advanced technology. Suitable for the circuits of AC 50Hz, rated voltage of 400V, rated current of 16A to 800A.
Its main function is to provide indirect contact protection for personal electric shock of fatal danger. Rated residual operating current does not exceed residual current operated circuit breaker of 0.03A when other protection measures are invalid, also can provide supplementary protection for direct contact, but not as the only direct contact protection. At the same time, CM1LE MCCB switch can also prevent electrical fire caused by the contact fault current. And CM1LE MCCB switch can protect overload and short circuit of the circuits, can also be used for infrequent conversion of the circuits.
The CM1LE MCCB switch has the small volume (equal to the volume of the corresponding molded case circuit breaker), high breaking, short arc arcing and residual operating current. At the same time, CM1LE MCCB switch can take alarm contact, shunt release, undervoltage release, auxiliary contact, turning handle operating mechanism, electric operation mechanism and other accessories. The wiring method has many ways: wiring in front of board, wiring on back of board, insertion type of the board and so on, is ideal product for users.
TXCM1LE MCCB (CM1LE MCCB switch) can be mounted vertically (upright) or horizontally (transverse).
The Circuit Breaker Meet the standards: GB 14048.2, IEC 60947-20

According to the pole, it classifies four types:
Type A: N-pole without over-current release components, and N-pole has been connected all along, and does not act with other three poles to turn on or off;
B-type: N-pole without over-current release components, and N-pole could act with other three poles (N-pole turn-on prior to turn-off);
Type C: N-pole fixed with over-current release components, and N-pole could act with other three poles (N-pole turn-on prior to turn-off);
D-type: N-pole fixed with over-current release components, and N-pole has been connected all along, and does not act with other three poles to turn on or off.

Accessory name	Accessory code		Accessory installation and lead way
	Electromagnetic release	Thermal magnetic release	100L/M 225L/M	100M 225M	00L/M		630M/H 800M/H	630M/H 800M/H
			3极	4极	3极	4极	3极	4极
Without accessory	200	300
Alarm contact	208	308
Shunt release	210 (210Y)	310 (310Y)
Auxiliary contact	220	320
Auxiliary contact Alarm contact	228	328
Undervoltage release	230	330			No	No
Shunt release Auxiliary contact	240 (240Y)	340 (340Y)	No		No		No
Two sets of auxiliary contact	260	360	No		No		No
Undervoltage release Auxiliary contact	270	370	No		No	No	No
Two sets of auxiliary contacts Alarm contact	268	368	No		No		No

Note: The code with Y in parentheses means the shunt release with delay function. The delay time is 0.5s ~ 2s, control voltage is AC240V / AC400V.
Only 4-poles products of B-type and C-type have 240,250,218,248 and 340,350,318,348 specifications annex code.
Only TXM1L-400 and 800-frame 4-pole products of B-type and C-type have 260,270,268 and 360,370,368 specifications annex code.

Classification of circuit breakers

According to the poles of products: two poles, three poles and four poles.
The two-poles product is only available in TXCM1LE-100M / 2300, TXCM1LE-225L / 2300, TXCM1LE-225M / 2300.
According to the wiring method: wiring in front of board, wiring on back of board, insertion type of the board;
According to the application: for distribution and for motor protection;
According to over-current release pattern: thermodynamic-electromagnetic (double) type, electromagnetic (instantaneous) type;
According to the residual current breaking time: non time-delay and time-delay;
According to the rated ultimate short-circuit breaking capacity of the circuit breaker: L-standard breaking type; M-second high breaking type; H-high breaking type;
According to the operation mode: the handle direct operation, the motor operation (with P), turning handle operation (for switchgear, with Z).

■ Ambient air temperature
  □ The upper limit of ambient air temperature is +40℃;
  □ The lower limit of ambient air temperature is -5℃;
  □ The average value of ambient air temperature within 24h does not exceed +35℃.
■ Altitude: The altitude of the installation site is not more than 2000m.
■ Pollution degree: 3.
■ Installation category: Ⅲ.
■ Atmospheric conditions: The air relative humidity in the highest temperature + 40℃ for not more than 50%; In the low temperature can have higher relative humidity. The maximum average relative humidity is 90%, while the average monthly minimum temperature is +20℃, and consider the temperature changes in product on the surface of the gel.
■ External magnetic field: The external magnetic field in the vicinity of the installation site does not exceed 5 times the geomagnetic field in any direction.

Characteristics of inverse time breaking action of circuit breakers over-current release for power distribution when every pole is power-on at the same time (see Table 3)

Characteristics of inverse time breaking action of over-current release for motor protection when every pole is power-on at the same time (products of 16A~40A without motor protection)

Residual current breaking time of the residual current operated circuit breaker

Action characteristics of general residual current operated circuit-breakers of I△n ≤ 30mA should be non time-delay type.

Action characteristic of time delay residual current operated circuit breaker

Limit non-driving time of time delay circuit breaker according to regulations of 2I△n, its action characteristic.

Instantaneous action characteristic setting value of the residual current operated circuit breaker for distribution is 10In±20%, and instantaneous action characteristic setting value of the residual current operated circuit breaker for motor protection is 12In±20%.

Inverse time protection characteristic curve of residual current operated circuit breaker

This series residual current operated circuit breakers are electronic residual current operated circuit breakers, mainly consists of the zero-sequence transformer, Electronic control leakage release and circuit breakers with overload and short circuit protection, all components are installed in a pair of plastic case.
When the circuits protected by the chip processing have leakage or personal electric shock, as long as the residual current reach to setting operating current value, the output signal of the secondary winding of the zero-sequence transformer trigger SCR to conduct, and make residual current operated circuit breaker act by the leakage release, thereby cutting off the power supply to play the protective role in leakage and electric shock.

When the protected circuits have overload or short circuit, the thermal magnetic release complete the delay or instantaneous trip action to make the residual current operated circuit breaker act, thereby cutting off the power supply to play the protective role in overload and shout-circuit.

Internal accessory of residual current operated circuit breakers

a. Undervoltage release

When the voltage drops (or even slow down) to the rated voltage range of 70% and 35%, undervoltage release should act; undervoltage release should prevent residual current operated circuit breaker closing when the power supply voltage is below the release voltage of 35%; When the supply voltage is equal to or greater than 85%, undervoltage release should ensure that the residual current operated circuit breaker can be closed. The rated value and code are shown in Table 7.
Note: Residual current operated circuit breakers equipped with undervoltage releases can be normally closing and opening when the undervoltage release at the rated voltage.

b. Shunt release

Residual current operated circuit breakers can be reliably disconnected at rated voltage of 70% to 110%. Rating and code (see Table 8)

C. Auxiliary contact and alarm contact parameters

Auxiliary contact

Alarm contact
When residual current operated circuit breaker opens and closes normally, the alarm contact does not act, only after the free trip (or fault trip), alarm contact alarms, the contact changes the original position, is that normally open transfers closed, normally closed transfers open. When the circuit breaker buckles again, the alarm contact restore the original state.

External accessories of residual current operated circuit breakers

Electric operating mechanism
When control voltage is in rated control voltage range of 85%-110%, the residual current operated circuit breaker can be making and breaking reliably. The rated value of the motor operated mechanism (see Table 10), the total height of the residual current operated circuit-breaker mounted with electric operating mechanism (see Table 11).

Installation dimensions of manual operating mechanism

Wiring diagram of leakage alarm module

Precautions:
1, Leakage alarm module auxiliary contact capacity: AC230V 0.5A.
2, The product must be connected to the module power supply before closing.
3, After leakage alarm, no pressing product test button continuously.
4, After leakage alarm, please promptly remove the fault, and press the reset button to reset.

Selection principle:
When selecting the rated residual operating current value of the residual current operated circuit breaker, the possible normal leakage current value of the protected circuit or equipment should be taken into account. When necessary, the leakage current value of the protected circuit or equipment can be got by actual measurement.
Selecting of the rated residual non-operating current of residual current operated circuit breakers, which should be not less than 2 times the maximum value of the normal leakage current of the electrical wiring and equipment.
Residual current operated circuit-breakers with a rated residual operating current of 30 mA should be preferred when hand-held power tools, portable electrical appliances, household appliances, sockets, appliances for construction sites (rated current not less than 100 A) and other equipments have difficulty in ground connection.
The residual current operated circuit-breaker with a rated residual operating current of 30 mA can be selected for single device. The residual current operated circuit-breaker with a rated residual operating current of 30 mA or more can be selected for the total protection of multiple devices (multi-branch).
Residual current operated circuit-breakers with a rated residual operating current of 30 mA should be selected for electrical equipment installed in wet locations.

Dimension of wiring in front of the board of TXCM1LE-125、250、400、630、800

Plug-in wiring diagram

Aperture diagram of plug-in wiring

Wiring on back of the board of TXCM1LE-100, 225

Wiring on back of the board of TXCM1LE-400, 630, 800

Aperture diagram of wiring on back of the board

Note: Specifications of "*" in the table is the screw-type plug-in of wiring on back of the board.

Example: TXCM1LE-225M / 4310 150A 50mA 0.4s AC230V, means TXCM1LE-225 type residual current operated circuit breaker for distribution protection, frame rated current of 225A, rated current of 150A, the second high type breaking capacity, four-poles, rated residual operating current of 50mA, delay type, breaking time <0.4s, thermal magnetic release, with shunt release (AC230V).
Selection, installation, use should be consistent with the product manual or the relevant national standards.

Rated current of 400A of the first level protection residual current operated circuit breaker, for example:

First level protection

Connecting wires:
Copper core plastic insulated conductor cross-sectional area is 50mm ²
Rated operating current: 250A
Rated residual operating current: 300mA ~ 500mA
Residual breaking time: 0.6s ≤ t ≤ 0.8s
The optional residual current operated circuit-breakers are:
TXCM1LE-225/400, DZ20L-250/400

Second level protection:

Connecting wires:
Copper core plastic insulated wire cross-sectional area is 4 ~ 16mm ²
Rated operating current: 100A, 80A, 63A, 40A
Rated residual operating current: 100mA ~ 300mA
Residual breaking time: 0.2s ≤ t ≤ 0.4s
The optional residual current operated circuit breakers are:
TXCM1LE-100/225, DZ20L-160, DZ15LE-100

Third level protection:

Connecting wires:
Copper core plastic insulated conductor cross-sectional area is 1.5 ~ 4mm ²
Rated operating current: 40A, 32A, 20A
Rated residual operating current: 30mA or less
Residual breaking time: t ≤ 0.1s or faster
The optional residual current operated circuit-breakers are:
TXCM1LE-100, DZ47LE-63

Fourth level protection:

Connecting wires:
Copper core plastic insulated conductor cross-sectional area is 1 ~ 2.5mm ²
Rated operating current: 32A, 20A
Rated residual operating current: 10mA or less
Residual breaking time: fast action type
The optional residual current operated circuit breakers are:
DZ47LE-63, DZ30LE-32

Users must specify when ordering:

7.1 Type and name of residual current operated circuit-breakers;
7.2 Rated current of residual current operated circuit breaker over-current release;
7.3 Rated residual operating current of residual current operated circuit breaker;
7.4 Breaking time of residual current operated circuit breaker;
7.5 Protection category, poles and quantity;
7.6 The rated voltage of the internal accessories and external accessories of the residual current action circuit breaker.
Note: When ordering, please specify the protection type of N-pole, in the absence of the protection type, the products are provided of S-type are A (3N) type, H-type are B type.

Example 1: Order TXCM1LE-1255/3328 40A 50mA <0.1s 80 units. This indicate that you order TXCM1LE-125/3328 residual current operated circuit breakers, rated current of over-current release is 40A, rated residual operating current is 50mA, breaking time <0.1s, three-poles, with auxiliary contacts and alarm contacts, for power distribution, 80 units.
Example 2: Order TXCM1LE-125H / 43102B 100A 30/50/100mA <0.1 s AC230V AC 230V 50 units. This indicate that you order TXCM1LE-125H/43102B residual current operated circuit breakers, rated current of over-current release is 100A, rated residual operating current is 30/50/100 mA (three-kinds adjustable), the breaking time <0.1s, second high type breaking capacity, four-poles, for motor protection, with electric operating mechanism (AC230V), shunt release (AC230V), N-pole protection type is B-type, 50 units.

Keywords : residual current operated protective device, CM1LE, residual current circuit breaker