Application:
NB110-30 AC contact or is mainly used in power system with AC 50Hz or 60Hz, the rated working voltage up to 660V,under the application category of AC-3,when the rated working voltage 380V,the rated operating current to 300A electrical, for the long-distance range making and breaking the electric circuit, and combines the elector magnetism starter with the suitable thermal overload relay or the electronic protector to protect against the possible overload electric circuit during operation(running).
Main Structure and Working Principle
The structure of the contact tor is the positive mounted straight action type double-break dots, cover and the body are made by the arc proof plastic, NB-9-16 uses the auto extinguishing of arc, but NB-26-110 has “U” shape the extinguishing of arc piece in the body to form the seal explosion chamber. The extinguishing of arc is good, the arc over distance is zero. The contact is made by the anti-fusion welding and bears the silver base alloy material wear electricity with good electric conductivity, long life, does not have the pollution to the environment, The terrine core has “E” shape structure, small volume, There are two kinds of coil wiring ways for the user choice, one is the two terminals in the identical end of the product; other is the two terminals in the product’ s beginnings and ends, the wiring is flexible and convenient, The base is made by the glass fiber reinforced plastics with high intensity, good dielectric properties, The installation way can be the bolt, also may use the guide rail installment, The disassemble and assemble are very convenient and rapid. The electric conduction part does not appear externally, the security performance is good.
The working principle of contractor: control power source of making (breaking) contact or pulling coil, magnetism system produces (vanishes) electromagnetism suction to drive the moving pat making and (breaking) circuit through then, realize the goal of control.
Common Work Condition and Installing Condition
The installation site elevation does not surpass 2000m.
Ambient air temperature should not over +40°C.also not over +35°C within 24h, the lower limit of ambient air temperature is -5°C.
The air relative humidity at installation site should not over 50% when the maximum temperature is +40°C: the higher relative humidity are allowed under lower temperature, for example,90% at 20°C. It must take the measures on the product occurring dew because of the change of temperature.
The installation site pollution class is 3.
The contractor can be mounted vertically or horizontally. If vertically mounts, the gradient between the mounted surface and the perpendicular plans is not bigger than ±30%.
Specification
The allowable application category of main circuit and the auxiliary circuit of the contractor and it’ s code see tab le 1
Table 1 application category of main circuit and the auxiliary circuit of the auxiliary circuit of the contractor and it’ s code.
Circuit | Application category code | Example of the typical usage | |||||||||
Main circuit | AC-1 | Conductive or the micro inductive load, residency furnace | |||||||||
AC-2 | The starting and breaking of wire winding type asynchronous motor | ||||||||||
AC-3 | The starting and breaking during operation of cage asynchronous motor | ||||||||||
AC-4 | The starting, plug breaking or reverse resolution, spot moving of cage asynchronous motor | ||||||||||
Auxiliary circuit | AC-15 | Control AC electromagnet load (> 72VA) | |||||||||
DC-13 | Control DC magnet | ||||||||||
Contactor rater insulation voltage (Ui), rated working voltage (Ue), conventional free air heat current (lth), rated operating current (le) and rated work rate see table 2. | |||||||||||
Type | Frame code | Rated insulation voltage (v) | Conventional free air heat current(A) | Rated operating current le (A) | Control the max, power of generator kW | ||||||
220V | 380V | 660V | 220V | 380V | 660V | ||||||
NB-09 | 16 | 1000V | 26 | 9 | 9 | 7 | 2.2 | 4 | 5.5 | ||
NB-12 | 16 | 28 | 12 | 12 | 9 | 3 | 5.5 | 6.5 | |||
NB-16 | 16 | 30 | 17 | 17 | 10 | 4 | 7.5 | 9 | |||
NB-26 | 26 | 45 | 26 | 26 | 17 | 6.5 | 11 | 15 | |||
NB-30 | 40 | 65 | 32 | 32 | 21 | 9 | 15 | 18.5 | |||
NB-40 | 40 | 65 | 37 | 37 | 25 | 11 | 17.5 | 22 | |||
NB-50 | 75 | 100 | 50 | 50 | 35 | 15 | 22 | 30 | |||
NB-63 | 75 | 125 | 65 | 65 | 43 | 18.5 | 30 | 37 | |||
NB-75 | 75 | 125 | 75 | 75 | 46 | 22 | 37 | 40 | |||
NB-95 | 110 | 145 | 96 | 96 | 65 | 25 | 45 | 55 | |||
NB-110 | 110 | 160 | 110 | 110 | 82 | 30 | 55 | 75 | |||
NB-145 | 185 | 250 | 145 | 145 | 120 | 40 | 75 | 100 | |||
NB-185 | 185 | 275 | 185 | 185 | 170 | 50 | 90 | 120 | |||
NB-210 | 300 | 350 | 210 | 210 | 210 | 60 | 110 | 150 | |||
NB-260 | 300 | 400 | 260 | 260 | 260 | 78 | 140 | 190 | |||
NB-300 | 300 | 450 | 300 | 300 | 280 | 88 | 160 | 220 |
Installation
Correct install wiring
Note that the terminal systole: Main circuit 1L1, 3L2, 5L3 is incoming terminal: 2T1 4T2 6T3 outgoing terminal
The incoming terminal of No auxiliary contact is: 13, 23, 33, 34……The coil terminal is: A1 and A2
Contactor overall and installation dimensions see figure 2, figure 4, figure 5 and table 9.
Product dimensions:
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