CM1LE Earth Leakage Circuit Breaker

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 CM1LE-100M / 2300, CM1LE-225L / 2300, CM1LE-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).

Normal operating conditions and installation conditions

■ 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.

Technical parameters

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

Structure and working principle

CM1LE 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.

Inner accessory of earth leakage 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 earth leakage 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 handle 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.

Outline dimensions

Dimension of wiring in front of the board of CM1LE-125、250、400、630、800

Plug-in wiring diagram

Aperture diagram of plug-in wiring

Wiring on back of the board of CM1LE-100, 225

Wiring on back of the board of CM1LE-400, 630, 800

Aperture diagram of wiring o back of the board

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

How to fast selection of CBR Earth leakage circuit breaker CM1LE

Example: CM1LE-225M / 4310 150A 50mA 0.4s AC230V, means CM1LE-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.

Structure chart of classification protection coordination of Earth Leakage Circuit Breaker

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:
CM1LE-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:
CM1LE-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:
CM1LE-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

Ordering information

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 CM1LE-1255/3328 40A 50mA <0.1s 80 units. This indicate that you order CM1LE-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 CM1LE-125H / 43102B 100A 30/50/100mA <0.1 s AC230V AC 230V 50 units. This indicate that you order CM1LE-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.