Basic Info.
Product Description
Scope of application
HTH8 Modular Contactor (also known as analog contactors and architectural contactors) are mainly used in power systems with AC 50Hz/60Hz, rated working voltage up to 400V and rated working current up to 100A. They are used as remote switches and control circuits in AC-1 and AC-7a (non-inductive or low-inductive loads, resistance furnaces, household appliances and similar low-inductive loads). It can also be used to control the load of household motor. Modular Contactors cant't be used in break short-circuit currents, so appropriate short-circuit protective appliances (such as small circuit breakers) should be selected when using them. It meets the standard IEC 61095. BCH8 contactor can expand auxiliary control, protection and indication functions. BCH8 Modular Contactor is a kind of control device used for long distance connection and disconnection of inductionless or low inductive load, resistance furnace, household appliances and similar low inductive load, household motor, etc. BCH8 Modular Contactor are mainly used in homes, hotels, apartments, office buildings, public buildings, shopping malls, gymnasiums and other places to achieve automatic control functions.
Product characteristics
(1) The analog and digital control device has novel structure and compact volume.
(2) Installation orbiting, dimension modularization, safe use, can be combined with small circuit breakers installed in the control lighting box.
(3)The use of high-quality insulation materials greatly improves the safety.
(4) Beautiful appearance with working status indicator window.
(5)No noise, suitable for hotels, hospitals and other places.
Normal working conditions
Ambient air temperature: The upper limit of ambient air temperature is + 60ºC and the lower limit is - 5ºC. When the AC contactor is installed in the distribution box, spacers must be assembled on both sides to facilitate heat dissipation. Elevation: The altitude of the installation site shall not exceed 2000m.
Main technical parameters
Specifications | 16A | 20A | 25A | 40A | 63A | 100A | ||
Rated current | AC-7a | 16 | 20 | 25 | 40 | 63 | 100 | |
AC-7b | 6 | 7 | 8.5 | 15 | 20 | 30 | ||
Agreed heating current Ith(A) | 25 | 25 | 25 | 63 | 63 | 100 | ||
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 | AC-7a | 230V | 3.5 | 4.5 | 5.5 | 9 | 14 | 22 |
400V | 6.5 | 8 | 10 | 16 | 25 | 38 | ||
AC-7b | 230V | 1.4 | 1.6 | 2 | 3.5 | 4.5 | 6.5 | |
400V | 2.4 | 2.8 | 3.4 | 6 | 8 | 11 | ||
Electrical life(times) | 10ten thousand | |||||||
Mechanical life(times) | 100ten thousand | |||||||
Maximum number of switching operations per hour | 30 | |||||||
Maximum number of switching operations per day | 100 | |||||||
Quota control power supply voltage Us(V) | AC 24/50Hz AC230/50Hz | |||||||
frequency | 50Hz/60Hz | |||||||
Class of pollution | 2 | |||||||
Rated impulse withstand voltage(Uimp) | 2.5kV(4kV--12/24/48VAV) | |||||||
Protection level | Contactor body | IP20 | ||||||
Installed in distribution box | Ip40 | |||||||
working temperature | -5ºC~+60ºC | |||||||
Storage temperature | -40ºC~+70ºC | |||||||
Hygrothermal resistance(IEC60068.1) | 2-class(At 55ºC,Relative humidity is 95%) | |||||||
ELSV(Ultra-low Safety Voltage) 12/24/48 VAC | ||||||||
Product control meets the requirements of SELV (Safe Ultra-Low Voltage) | ||||||||
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 electrified, the coil current generates magnetic field, which generates enough electromagnetic suction to overcome the reaction force, and the armature is sucked in to make the contact connected. When the coil voltage disappears or the coil voltage will be low to a certain value, that is, when the so-called release voltage, the magnetic flux generated by the armature end surface decreases, the electromagnetic suction begins to be smaller than the reaction force produced by the reaction spring and the contact spring. The armature of the contactor is released under the action of this reaction force, leaving the yoke, and the contact breaks off immediately.
Selection of 50Hz Modular Contactor
