Year1
- 额定电压：
- 12KV
- 额定电流：
- 630A
- 额定频率：
- 50HZ
R-type vacuum load switches and combination appliances are suitable for use in three-phase AC ring networks or terminal power supplies and industrial electrical equipment for load control and short-circuit protection. The load switches open and close loads and close loops. current, no-load transformer and cable charging current. Combination appliances can break any current up to the rated short-circuit current. It adopts direct-acting isolation fracture and vacuum arc chamber linkage. Available in manual and electric functions.
/R Unique transmission structure design, the arc extinguishing chamber only withstands high voltage at the moment of closing and opening, so it is small in size and light in weight.
/R can realize one-time operation of isolation fracture and arc extinguishing chamber fracture.
/R There is a grounding valve interlocked with the grounding switch between the static contact and the movable contact conductive tube, which not only ensures safety but also facilitates maintenance.
Usage:
/ Vacuum load switches and R combination electrical appliances are mainly used for load control and short circuit in urban power distribution stations and industrial electrical equipment that supply power to three-phase AC, ring network or terminals. For protection, since combined electrical appliances are more reliable than circuit breakers in protecting transformers and other equipment, they are especially suitable for ring networks, radiation power supply units and box-type substations.
Usage environment
The altitude does not exceed
Ambient air temperature: upper limit + ℃, lower limit ℃
Relative humidity, the daily average value is not greater than %, and the monthly average value is not greater than % (+℃ )
The surrounding air should not be significantly polluted by corrosive, flammable gases, etc.
There should be no regular strenuous exercise.
Discharge Counter
The discharge counter is a high-voltage electrical appliance used to monitor the discharge action of the arrester. Its structure is composed of non-linear resistors, electromagnetic counters and some electronic components. Under normal operating voltage, the leakage current flowing through the counter is very small, and the counter operates slightly. When the arrester passes through lightning waves, operating waves and power frequency overvoltage, a strong operating current passes through the nonlinear resistor of the counter and undergoes DC conversion. The electromagnetic counter coil discharges and causes the counter to actuate once, thereby realizing a device for measuring the number of arrester operations. Structurally, a resistor is used to take pressure, an electromagnetic counter is used for display, a transparent glass cover, a sealing rubber gasket, a bottom plate and a flange are used for clamping and sealing, and the high-voltage outlet is led out from the center of the bottom plate.
type discharge counter adopts C resistor and is suitable for arresters of system and voltage levels below.
The special discharge counter for /, / type zinc oxide arresters uses resistor sheets and is suitable for zinc oxide arresters of system and below levels, and can be used for online monitoring of arresters.
Monitor
In addition to the function of monitoring the discharge action of the arrester, the monitor can also monitor changes in the leakage current of the arrester and provide timely and reliable data on the operating quality of the arrester. The type monitor uses resistor sheets and is suitable for zinc oxide arresters of ~ system and below.
The performance of discharge counter and monitor products meets the national standard B/"Discharge Counter for Lightning Arrester".
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