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Capacitor Duty Contactors Gensave RKH Series 525V-25A

788.00

Capacitor Duty Contactors RKH Series 525V 

Capacitor Duty Contactor: these are special types of contactors used to switch on capacitors and capacitor banks. Ordinary contactors get damaged easily over repeated switching of the capacitors. So capacitor duty contactors are the best choice for switching on capacitors as these type of contactors limit the inrush current and tends to increase the capacitor lifespan.

In Low Voltage industrial installations, capacitors are mainly used for reactive energy correction (raising the power factor). When these capacitors are energized, over currents of high amplitude and high frequencies (3 to 15 kHz) occur during the transient period (1 to 2 ms).

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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