Transformer protection cubicle
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.
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.