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Protective untriggered gap Ð-77

Protective untriggered gap P-77 designed in metal-ceramic protects balanced lines and other engineering facilities of movable and fixed equipment from overwork.

 

Basic electric parameters of protective untriggered gap Ð-77:

The name of the parameter, unit of measure

Norm

no less than

no more than

Puncture potential, static, V

170

320

Puncture potential, dynamic, kV with the speed of voltage increase on the electrodes of the surge absorber

no more than 1 kV/microsecond

no more than 20 kV/microsecond

 




1,5

3,0

Time of disruption lag, microsecond, with the speed of voltage increase on the electrodes of the surge absorber

no less than 1 kV/microsecond

no less than 20 kV/microsecond

 

 


1,3

0,15

Time of disruption lag of any interval with respect to another, microsecond (with the speed of voltage increase no less than 1 kV/microsecond)

 

 

0,2

Time of reduction of discharge gap, millisecond after the holdover of plate current in the impulse

plate current=30 kilo ampere
plate current =20 kilo ampere
plate current =10 kilo ampere

 




250
130
75

Static interelectrode capacitance, picofarad

 

25

Dielectric resistance, Megaohm

100

 

Protective untriggered gap P-77 Protective untriggered gap P-77

 

Instructions on the operation of protective untriggered gap Ð-77:

  • While operating protective untriggered gap Ð-77 parameter points shouldn't overrate the admissible values.
  • On-position of protective untriggered gap – any position.
  • The binding in the device – in the special socket.
  • Cooling down – natural cooling.
  • Protective untriggered gap Ð-77 is fixed in the device on the cathode flange with the help of 6 screws M6. We recommend to joint to the electrodes of the gap with the help of screws using the holes on the anode buttons.
  • While binding and connecting of the gap in the device the power used shouldn't lead to the curve of button.

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