Overvoltage protector bf-d-12.7-600

Xi'an Baofa Co
, Ltd
BF-D-12
7-600
Overvoltage protector is a new type of overvoltage protector, which is mainly used to protect the insulation of generator, transformer, vacuum switch, bus, motor and other electrical equipment from overvoltage damage
According to the structural features
1
No gap: the functional part is a nonlinear zinc oxide resistor
2
Series gap: the functional part is series gap and zinc oxide resistor
According to the outline structure:
F
Composite insulating jacket
T
T-shaped base: interphase distance: including 85, 131, 150, 200, 310, 630, etc
W1, outdoor, with cable W2, outdoor, without cable
According to the protected object:
A
Motor type:
B
Power station type: (parallel for conventional power distribution)
C
Capacitor type:
Characteristic voltage: including 3
8kv, 7
6kv, 12
7kv and 42KV
Overvoltage protector has a new product, namely three-phase combined overvoltage protector

 
Executive standard
Implement gb11032-2000, JB / t10496-2005, JB / t10609-2006 and JB / t8459-1996
 
Fold and edit the model description of this section
1
Protection object: a-motor; B - generator, transformer, bus line and switch; C-parallel compensation
 
capacitor; O - motor neutral point;
 
2
Continuous operation voltage: the effective value of power frequency voltage allowed to be permanently applied between TBP phases and phase to ground;
 
3
Jacket type: F silicone rubber jacket, no 'f' is porcelain jacket;
 
4
Use environment: W is outdoor type, no 'W' is only applicable to indoor;
 
5
Additional functions: & quote; IM" The product is equipped with overvoltage action recorder (only applicable to indoor 35kV);
 
" J" The product is equipped with overvoltage action counter (only applicable to indoor 10kV and below);
 
J is the product with js-8 counter (only applicable to outdoor TBP with system voltage of 35kV),
 
6
The models in Table 2 are except & quot; W2" In order to lead out without high-voltage cable, other models adopt high-voltage cable lead out structure

 
Therefore, the length of outgoing cable & quot; L" And line nose aperture & quot& Phi;& quot; Requirements shall be indicated by the user when ordering

 
Structural features
The electrical principle of three-phase combined overvoltage protector is shown in figure (1), in which FR is zinc oxide non-linear current
 
Resistance, CG is the discharge gap
Due to the symmetrical structure, any three of them can be connected to three phases a, B and C respectively
 
A ground wire

 
Compared with the current overvoltage protector, the three-phase combined overvoltage protector has incomparable characteristics of other similar products

 
1
The combination of zinc oxide nonlinear resistance and discharge gap is adopted to protect each other
Discharge gap oxidizes
 
The charging rate of zinc resistance is zero, and the nonlinear characteristics of zinc oxide make the arc extinguish immediately after the action of discharge gap without freewheeling
 
There is no cut-off wave, the discharge gap no longer undertakes the arc extinguishing task, and the output is improved
 
Service life of the product

 
2
The voltage impulse coefficient is 1, and the discharge values are equal under various voltage waveforms
It is not affected by various operating overvoltage waveforms
The overvoltage protection value is accurate and the protection performance is excellent

 
3
The four-star connection method can reliably limit the overvoltage between phases and phase to ground
The phase to phase overvoltage can be greatly reduced
Compared with the conventional lightning arrester, the phase to phase overvoltage is reduced by 60 ~ 70%, and the reliability of protection is greatly improved

 
4
It adopts silicone rubber jacket and high-voltage cable external lead structure, which has the advantages of easy installation, strong sealing, small volume, shock (vibration) resistance, etc
It can be directly installed on the handcart chassis of the switch cabinet or in the transformer room

 
5
The ambient temperature used is - 40 ℃ ~ + 60 ℃, and the altitude is less than 2000m (indicate when ordering higher than 2000m)

 
6
When intermittent arc grounding overvoltage and ferromagnetic resonance overvoltage occur in the system, and its energy is less than 2ms400a square wave impact energy, shk-tbp can play a protective role