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Guodian Nanzi Integrated Protection PST693U Transformer Protection Device

2021/6/30 15:10:55 Source: Hangzhou Hangrui Power Automation Co., Ltd Views: one hundred and thirty-eight

Guodian Nanzi Integrated Protection PST693U Transformer Protection Device

one Principle description
one point one Three section compound voltage overcurrent protection
When the current of any phase is greater than the fixed value and the composite voltage is started, the device will trip after delay.
Functions of complex voltage starting element: A Phase current flow Uab 、 Uca Or negative sequence voltage startup, B Phase current flow Uab 、 Ubc Or negative sequence voltage startup,
C Phase current flow Ubc 、 Uca Or negative sequence voltage start. If the re voltage starting element exits, the over-current protection does not need re voltage starting.
1.2　 Two section definite time negative sequence overcurrent protection
When the negative sequence current is greater than the fixed value, the device will act after delay. Generally, the first section is used for tripping and the second section is used for alarm.
1.3　 Fixed time zero sequence overcurrent protection at HV side
Measurement range of fixed time zero sequence overcurrent at HV side 0.05~30A (secondary value) for indirectly grounded systems.
When the high-voltage side of transformer 3I0 If it is greater than the fixed value, the device will trip or send a signal after a delay.
1.4　 Fixed time zero sequence overcurrent protection at low-voltage side
Measurement range of fixed time zero sequence overcurrent protection at low-voltage side 0.2~100A (secondary value) for directly grounded systems.
When the transformer has low zero sequence 3I0 If the overcurrent is greater than the fixed value, the device will trip or send a signal after a delay.
1.5　 Inverse time limit zero sequence overcurrent protection at low-voltage side
Measurement range of inverse time zero sequence overcurrent protection at low-voltage side 0.2~100A (secondary value) for directly grounded systems.
1.6　 Overload protection
When the current of any phase is greater than the fixed value, the device will trip or send a signal after delay.
1.7　 Overvoltage protection
When any line voltage is greater than the fixed value, the device will trip after delay.
one point eight When the voltage of three lines is less than the fixed value, the device will trip after time delay.
Low voltage action condition: one of the three line voltages is greater than 80V , and delay 100ms , it is considered that the low-voltage operation condition is always valid.
Delay after low-voltage action 10S After that, the low-voltage action condition is automatically invalid. This condition can be enabled or disabled.

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Hangzhou Hangrui Power Automation Co., Ltd

Building Materials General

six year

Certified
  • Enterprise type:

    Others

  • Business model:

    Production and processing

  • Honors and qualifications:

    0 items

  • Main business:

    Guodian Nanzi, Guodian NARI, Changyuan Shenrui, NARI relay protection microcomputer protection device

  • Address:

    Jianggan District, Hangzhou, Zhejiang

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