Microcontroller protection of connections provides security, automation and control of overhead and cable power lines, section and main switch switchgear, transformers, power up to 6.3 MVA and motors up to 4 MW.
|Number of windings of the protected transformer|
|Rated voltage of the power transformer, kV|
0,4 - 35
0,4 - 6
|Rated DC voltage of cubicle power, V||220|
|Power consumption, W, max||30|
|Average lifetime, years, max||15|
|Weight, kg, max||200|
|Overall and fitting dimensions, mm||600x400x2000|
ShZT-1 transformer protection cubicle is designed for protection of two- and three-winding power transformers and autotransformers with HV-side voltage of 35 kV from phase faults and interturn short circuits. ShZT-1 is based on MK-DZT microcontroller transformer differential protection (core protection) and MKZP-3 microcontroller connection defense (backup protection).
2 degrees of differential protection — differential overcurrent and the sensitive biased differential protection.
MK-DZT-3 implements the functions of protection and automation, control over switching devices, measuring and signaling:
- overcurrent protection;
- disconnecting from external protection;
- “OFF” command to the circuit breaker;
- emergency and warning alarm.