BMC7-32-63 4P
Scope of application
BMC7 miniature automatic AC contactor (also known as modular contactor, construction contactor) is mainly suitable for power systems with AC 50Hz/60Hz,
rated operating voltage up to 400V, and rated operating current up to 63A, in AC-1 , AC-7a (non-inductive or low-inductive loads, resistance furnaces, household
appliances and low-inductive loads for similar purposes) use category, used for remote switches and control circuits, and can also be used to control household
motor loads. Household contactors are not used to break short-circuit current, so appropriate short-circuit protection appliances (such as small circuit breakers)
should be selected when used. Comply with standards IEC61095, GB17885. IEC60947-4-1, GB/T 14048.4 BMC7 contactor can expand auxiliary control, protection
and indication functions.
BMC7 household AC contactor is a control appliance used to connect and break non-inductive or low-inductive loads, resistance furnaces, household appliances
and similar low-inductive loads over long distances, household motors, etc.
BMC7 household contactors are mainly used in homes, hotels, apartments, office buildings, public buildings, shopping malls, stadiums and other places to realize
automatic control functions.
Features
①. Modular control electrical appliances with novel structure and compact size.
②. The installation is track-based, the size is modular, and the use is safe. It can be installed in the control lighting box in combination with a small circuit breaker.
③. Using high-quality insulation materials greatly improves safety.
④. Beautiful appearance, with working status indicator window.
⑤. No noise, suitable for hotels, hospitals and other places.
Model and its meaning
Normal working conditions
Ambient air temperature: The upper limit of the ambient air temperature is +60℃ and the lower limit is -5℃. When the household AC contactor is installed in the
distribution box, spacers must be assembled on both sides to facilitate heat dissipation.
Altitude: The altitude of the installation site does not exceed 2000m.
Atmospheric conditions: When the installation temperature is +60°C, the relative humidity of the air does not exceed 50%. Higher relative humidity can be
allowed at lower temperatures, such as up to 90% at +20°C. Occasionally caused by temperature changes Special measures should be taken for condensation.
Pollution level: Level II.
Installation category: Ⅱ.
Installation method: TH35-7.5 guide rail installation is used. There is no significant impact or vibration at the installation location. It is installed vertically. The
inclination of the installation surface in any direction does not exceed 5°.
The main technical parameters
Quota work system
a) Eight-hour working system: This working system is the basic working system. The agreed free air heating current Ith of the household AC contactor is
determined by this working system.
b) Intermittent cycle working system: The rated operating frequency of household AC contactors under this working system is 30 times/h, and the load factor is
40%.
Action (operation) conditions
When the ambient air temperature is in the range of -5℃~+60℃, apply the rated power supply voltage Us to the contactor attraction coil to make it heat to a
stable state, the contactor should be within the range of (85%~110%) Us Can reliably close under any voltage; release and open between 75% and 20% of the
rated control power supply voltage Us.
Product life
Mechanical life: The mechanical life of the modular contactor is not less than 1 million times.
Electrical life: The electrical life of the modular contactor is not less than 100,000 times.
| Specification | 16A | 20A | 25A | 40A | 63A | ||
| Rated current | AC-7a（AC-1） | 16 | 20 | 25 | 40 | 63 | |
| AC-7b（AC-3） | 6 | 7 | 9 | 18 | 25 | ||
| Agreed heating current Ith (A) | 25 | 25 | 25 | 63 | 63 | ||
| Rated insulation voltage Ui(V) | 500 | ||||||
| Rated operating voltage Ue (V) | 250V(1P/2P) 400V(3P/4P) | ||||||
| Number of main contacts | 1P | 1NO、1NC | |||||
| 2P | 1NO1NC、2NO、2NC | ||||||
| 3P | 3NO、3NC | ||||||
| 4P | 2NO2NC、3NO1NC、4NO、4NC | ||||||
| Control power (KW) | AC-7a（AC-1） | 250V | 3.6 | 4.6 | 5.7 | 9.2 | 14.4 |
| 400V | 6.3 | 7.6 | 16.4 | 26.2 | 41.4 | ||
| AC-7b（AC-3） | 250V | 1.3 | 1.6 | 2 | 4.1 | 5.7 | |
| 400V | 3.9 | 4.3 | 5.9 | 11.8 | 16.4 | ||
| Electrical life (times) | 100,000 | ||||||
| Mechanical life (times) | 1,000,000 | ||||||
| Maximum number of switching operations per hour | 30 | ||||||
| Maximum number of switching operations per day | 100 | ||||||
| AC/DC12V AC/DC24V AC/DC48V AC/DC110V AC/DC 230V | AC 24/50Hz AC230/50Hz | ||||||
| frequency | 50Hz/60Hz | ||||||
| pollution level | 2 | ||||||
| Rated impulse withstand voltage (Uimp) | 2.5kV（4kV--12/24/48VAV） | ||||||
| Protection level | Contactor body | IP20 | |||||
| （IEC60529） | Installed in distribution box | IP40 | |||||
| Operating temperature | -5℃~+60℃ | ||||||
| storage temperature | -40℃~+70℃ | ||||||
| Heat and moisture resistance (IEC60068.1) | Category 2 (temperature 55℃, relative humidity 95%) | ||||||
| ELSV (Extra Low Safety Voltage) compliant with 12/24/48VAC version | |||||||
| Product control complies with SELV (Safety Extra Low Voltage) requirements | |||||||
Note: When the contactor is installed in the distribution box, spacers must be assembled on both sides to facilitate heat dissipation.
working principle
When the coil is energized, the coil current generates a magnetic field, which generates enough electromagnetic attraction to overcome the reaction force,
attract the armature, and connect the contacts. When the coil voltage disappears or the coil voltage drops to a certain value, it is the so-called release voltage.
due to the reduction of the magnetic flux generated by the armature end face, the electromagnetic attraction force begins to be smaller than the reaction force
generated by the reaction spring, contact spring, etc. The contactor armature is released under the action of this reaction force, leaves the magnetic yoke, and the
contacts are immediately disconnected.
Selection of 50Hz household AC contactor
| 1P | Rated current(In) | Rated current (AAC) (50Hz) | Contact | Width(mm) | Schematic diagram | |
| AC7a（AC-1） | AC7b（AC-3） | |||||
| 25A | 9A | 220...240 | 1NO | 18 |
|
|
| 2P | 16A | 6A | 230...240 | 2NO | 18 |    |
| 230...240 | 1NO+1NC | 18 | ||||
| 25A | 9A | 24 | 2NO | 18 | ||
| 230...240 | 2NO | 18 | ||||
| 230...240 | 2NC | 18 | ||||
| 40A | 18A | 220...240 | 2NO | 36 | ||
| 63A | 25A | 220...240 | 2NO | 36 | ||
| 3P | 25A | 9A | 220...240 | 3NO | 36 |  |
| 40A | 18A | 220...240 | 3NO | 54 | ||
| 63A | 25A | 220...240 | 3NO | 54 | ||
| 4P | 16A | 6A | 220...240 | 2NO+2NC | 36 |   |
| 25A | 9A | 24 | 4NO | 36 | ||
| 220...240 | 4NO | 36 | ||||
| 24 | 4NC | 36 | ||||
| 220...240 | 4NC | 36 | ||||
| 220...240 | 2NO+2NC | 36 | ||||
| 40A | 18A | 220...240 | 4NO | 54 | ||
| 220...240 | 4NC | 54 | ||||
| 63A | 25A | 220...240 | 4NO | 54 | ||
| 220...240 | 4NC | 54 | ||||
| 220...240 | 2NO+2NC | 54 | ||||
| 220...240 | 3NO+1NC | 54 | ||||
Installation diagram
| type | Rated current | Stripping length | circuit | Torque | copper wire | Schematic diagram | ||
| hardwired | Flexible wire or ferrule terminals | |||||||
| BMC7 | PZ1:4mm | 16-63A | 9mm | Control loop | 0.8Nm | 1.5~2.5mm² | 1.5~2.5mm² |  |
| 2×1.5mm² | 2×2.5mm² | |||||||
| 16 and 25A | Power loop | 1.5×6mm² | 1~4mm² | |||||
| PZ2:6mm | 40A-63A | 14mm | 3.5Nm | 6~25mm² | 6~16mm² | |||
| AUC11,AUC20 | PZ1:4mm | - | 9mm | - | 0.8Nm | 1.5~2.5mm² | 1.5~2.5mm² | |
| 2×1.5mm² | 2×2.5mm² | |||||||
Auxiliary accessories
| AC-12 | AC-15 | DC-13 | Rated current | Circuit diagram | picture | ||||
| control voltage | control current | control voltage | control current | control voltage | control current | ||||
| BMC7-AUC11 | 240V | 5A | 230V | 2A | DC | 1A | 5A |  |
 |
| 130V | |||||||||
| BMC7-AUC20 | 240V | 5A | 230V | 2A | DC | 1A | 5A |  |
|
| 130V | |||||||||
Spacers Spacers are used to reduce the temperature rise of devices installed side by side. It is recommended to separate electronic equipment (temperature regulating devices,
programmable clocks, etc.) from electromechanical equipment (pulse relays, contactors).
| Spacer | Technical specifications | picture |
| 3mm spacer |  |
|
| 9mmspacer |
Technical specifications
| Control voltage(Ue) | VAC | 24...240 | 230...240 | 24...48 |
| VDC | 24...130 | - | ||
| Working frequency | Hz | 50 | ||
| Width (multiples of 9mm) | 1 | 2 | ||
| Auxiliary contact (breaking capacity) | ●Minimum:10mA at 24VDC/AC-COSΦ=1 | - | ||
| ●Maximum: | ||||
| ○5A at 240V DC-COSΦ=1 | ||||
| ○1A at 130 VDC | ||||
| Number of contacts | 1NO+1NC/2NO | - | ||
| Operating temperature | ℃ | -5℃~+50℃ | ||
| storage temperature | ℃ | -5℃~+50℃ | ||
Contactor power consumption
BMC7 household AC contactor-50Hz
| Poles | le Rating | Uc(VAC)(50Hz) | Power consumption | Max Power | ||
| AC-7a | AC-7b | Hold on | Pull in | |||
| 2P | 16A | 6A | 230 | 2.1VA | 2.1VA | 2.0W |
| 20A | 7A | 230 | 2.1VA | 2.1VA | 2.0W | |
| 25A | 9A | 230 | 2.1VA | 2.1VA | 2.0W | |
| 32A | 12A | 230 | 2.1VA | 2.1VA | 2.0W | |
| 40A | 18A | 230 | 2.3VA | 2.3VA | 2.0W | |
| 63A | 25A | 230 | 2.3VA | 2.3VA | 2.0W | |
| 4P | 16A | 6A | 230 | 2.3VA | 2.3VA | 2.0W |
| 20A | 7A | 230 | 2.3VA | 2.3VA | 2.0W | |
| 25A | 9A | 230 | 2.3VA | 2.3VA | 2.0W | |
| 32A | 12A | 230 | 2.3VA | 2.3VA | 2.0W | |
| 40A | 18A | 230 | 6.0VA | 6.0VA | 5.5W | |
| 63A | 25A | 230 | 6.0VA | 6.0VA | 5.5W | |
Shape and installation dimensions
Installation, use and maintenance
Before installation, you should check the technical data of the household AC contactor (such as whether the rated voltage, current, operating frequency, etc. meet the
requirements).
During installation, it should be installed according to the specified conditions. The terminal A1 of the contactor coil should be facing upwards, in line with human visual habits.
Contactors with metal mounting base plates must be properly grounded.
The terminal screws should be tightened. After checking that the wiring is correct, the suction coil should be energized and opened and closed several times when the main
contact is not charged. The test action can be reliable before it can be put into use.
If you find abnormal noise when using a household contactor, it may be that there is dirt on the pole surface of the iron core. Please clean the pole surface.
When using a household AC contactor, all parts of the product should be checked regularly to ensure that the movable parts are not stuck and the fasteners are not loose. If the
parts are damaged, they should be replaced in time.
Applications
BMC7 household contactors can be used in large-scale lighting circuit control, public hot water control, geothermal system power supply control, automatic roller shutter
control, small motor control, etc.
combine.It can effectively control various electrical equipment in large public places such as hotels, hotels, stations, hospitals, and office buildings, and can be used as the
ultimate
terminal execution unit of intelligent building systems.
Application occasions
Banks, industry and commerce, taxation, telecommunications, hospitals, postal services, finance bureaus, labor bureaus, personnel bureaus, social security bureaus, government
one-stop service offices, insurance, vehicle management offices, transportation
Administration offices, consulates, entry and exit, customs, inspection and quarantine bureaus, centers for disease prevention and control, technical supervision bureaus, product
customer service centers and other window service industries.
Precautions
1. Before installation, check whether the household contactor is consistent with the scope of use and normal working conditions.
2. The wiring method of BMC7 contactor should be correct.
3. The wiring screws of BMC7 household contactor need to be tightened when wiring.