1. Application
Three-phase combined overvoltage protector is a new type of overvoltage protector and is mainly used in electric power network of power generation, power supply and the power consumption enterprise. It is used to protect such electrical equipment as transformer, switch, busbar, motor etc., which can limit the atmospheric overvoltage and operation overvoltage caused by switches and also can reliably limit the overvoltage between phases and the phase to ground.
2. Main Feature:
2.1It adopts the structure of combined zinc oxide non-linear resistance and discharge gap to protect each other. The discharge gap makes the chargeability of zinc oxide resistance to be zero, the nonlinearity of zinc oxide in turn makes it extinguish arc after the discharge gap acts without continuous flow and cutoff, and the discharge gap no longer undertakes the extinguishing task, thus improves the service life of product.
2.2Under a variety of voltage waveforms, all the discharge values are equal, which are not affected by various operating overvoltage waveforms, the protection value of overvoltage is correct and the protection performance is excellent.
2.3It adopts four-star connection, which can limit both overvoltages between phases and phase to ground. It can greatly reduce the overvoltage between phases, compared to the conventional arrester, the overvoltage between phases is reduced significantly, therefore, the reliability of protection is greatly improved.
2.4It adopts silicon rubber casing and high voltage cable leading-out structure with the advantages of easy to install, good sealing, small volume, vibration resistance etc. It can be directly installed on the hand bogie underpan of switchgear cabinet or in the transformer room.
2.5The service ambient temperature is -40℃~+60℃, the altitude is lower than 2000m (if higher than 2000m, it shall be indicated when ordering).
2.6 When intermittent arc grounding overvoltage and ferromagnetic resonance overvoltage occur in the system and its energy is less than 2ms400A square-wave shock energy, the CBP can assume the protection function.
3. Main technical indexes:
3.1 Altitude is not exceeding 3000m;
3.2 Ambient temperature:
Highest40℃ lowest -20℃ indoor; Comparative humidity: ≤95%(25℃).
3.3 The grid frequency：58～62Hz（Under the system of 60HZ） 48～52Hz（Under the system of 50HZ）;
3.4 Installation site should not contain chemical etching gas in the air, steam, explosive dust.
