Description
Application and feature
RKH 25、32、43、63、85、95 switching capacitor contactors are specially used for switching low voltage parallel capacitor, they are widely applied to reactive power compensated equipment with AC 50Hz,voltage up to 380V,the contactor is equipped with restraining surge current device, it can reduce the impact to capacitor caused by switch on surge current and step down instantaneous operating over voltage during breaking, it can take place of switch-over device that is composed of one piece contactor and three pieces current-limit reactors, it is small volume, light, strong breaking capacity, easy installation.
Technical parameters
| Item Specifications | 25 | 32 | 43 | 63 | 85 | 95 | |
| Controlled capacitor
Capacity (kVAR) |
230V | 6 | 9 | 10 | 15 | 20 | 32 |
| 400V | 12 | 18 | 20 | 30 | 40 | 50 | |
| Rated insulation voltage(V) | 500 | ||||||
| Rated working voltage(V) | 380 | ||||||
| Conventional thermal current(A) | 25 | 32 | 43 | 63 | 85 | 95 | |
| AC-6b Rated working current(A) | 17 | 26 | 29 | 43 | 58 | 72 | |
| Rated current of capacitor with surge peek value7 | 20Ie | ||||||
| Control Coil voltage(V) | 220/380 | ||||||
| insulation level of Coil | B | ||||||
| conventional thermal current of auxiliary contact(A) | 6 | 10 | |||||
| Operating frequency(time/h) | 120 | ||||||
| Electric life （time) | 105 | ||||||
| Mechanical life(time) | 106 | ||||||
Service Conditions
1. Altitude :no more than 2000m.
2. Ambient air temperature : -25℃ –+40℃.
3. Relative humidity : not exceed 90% at +25℃.
4. No corrosive gas, conductive dust, inflammable and explosive medium surrounded.
5. The inclination between vertical surface and mounting surface is not more than 5 degree.
Application and maintenance
1. inlet and outlet wire of contactor must be connected firmly, avoid to
arcing between phase to phase which caused by flashover during switching on, other wise the contactor and device would be damaged.
2. during capacitor switching on, if the surge current is too high, which exceed the retaining ability of contactor, the resistor will be burned, at this time, please change this resistor and then continue using it.
3. the electrical appliance selected for discharge equipment of reactive power compensation device, whose insulation voltage shall be more than 2Ue, avoid to damage contact due to fault of discharge equipment.
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