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Block of protection and control of outgoing connection of БЗП type

Block of protection and control of outgoing connection (БЗП) intended for comprehensive protection and remote control of outgoing connections miner switching device, transformer substations and switchgear with voltage up to 1200V at 50 Hz.

Application area – industrial and mining units, located in mines, that are hazardous with gas (methane) and (or) coal dust, with power from the network with isolated neutral.
Block provides the configuration and control via RS-485 communication interface with MODBUS RTU protocol from an external controller or a special control panel.
For the block operation it is required two current transformer measuring phase currents.
Designer and Manufacturer: PJSC “DEG”.


  • a maximal current protection (МТЗ);
  • overcurrent (depending on the current set point);
  • inrush current protection;
  • underload;
  • phase current asymmetry protection;
  • under- and over-voltage;
  • insulation control;
  • a continuous monitoring of the resistance of auxiliary low-voltage circuits 36-42V;
  • temperature/posistor protection of motor (via posistor sensors in the motor);
  • intrinsically safe remote control of one or two contactors (reverse option) with:
  1. protection from the loss of controllability during the closing of the remote control cores;
  2. control of the ground circuit via diodes.
Supply voltage36/42VAC (+15…-35%), 50Hz
Supply voltage auxiliary18VAC (+10…-35%), 50Hz
Current consumption0,1A (36V);0,15A (18V)
Current control input2 (Unom =7,2Vac)
Intrinsically safe control input2 (18Vac, <60mA)
Status of ready on/off contactor input1
Temperature control input2 (posistor/Pt100/Pt500/Pt1000)
Power circuit isolation control input1 (100V, 0,5mA)
Low voltage circuit isolation control input2 (100V, 0,5mA)
Relay outputs3 (6A, 250Vac at COSφ>0,3)
Communication interfaceisolated, RS-485
Communication protocolMODBUS RTU
Address setting input4 (setting address – 64…79)
Communication speed setting input2 (19200/38400/57600/115200)
Ambient temperature0…+400C
Relative humidity98% at a temperature 350С
Dimensions115×45×100mm (l×w×h)
MountingDIN-rail 35mm
Weightnot more than 0,25 kg

Warranty period – 12 months from the date of commissioning of the device, but not more than 18 months from the date of delivery.


Export Department:

Elena Kats
tel.+38 (050) 422-79-27
e-mail: elena.kats@deg.com.ua