Auxiliary Power Distribution Panel

The Auxiliary Power Distribution Panel (APDP) is designed to supply power to internal consumers (lighting, ventilation, heating, automation systems, etc.) within transformer substations, distribution points, switchgear assemblies, and other power facilities/industrial plants.

Functional Composition:

  • AC power distribution circuits;
  • Circuit breaker status signaling circuits;
  • Circuit breaker control circuits;
  • Voltage monitoring circuits;
  • Control circuit power supply;
  • Automatic Transfer Switch (ATS) circuits;
  • Voltage/current measurement circuits;
  • Lighting circuits.

Structural Composition:

  • Panel 1: Incoming device + Bus Section 1 with outgoing feeders; 
  • Panel 2: Incoming device + Bus Section 2 with outgoing feeders;
  • Sectional Panel: Sectional circuit breaker + Bus Sections 1/2 control;
  • Cable compartments for Bus Sections 1/2.

Functions:

  • Power input and bus sectioning;
  • Automatic backup transfer (mechanical/electrical interlocks); 
  • Motor control and protection; 
  • Soft-start and frequency regulation; 
  • Lighting control;
  • Electric heater control; 
  • Electrical parameter measurement; 
  • Short-circuit/overload protection; 
  • Automation signal monitoring/alarming; 
  • Visual/audible alarms; 
  • SCADA integration; 
  • Local/remote control. 

 Advantages:

  • Enhanced Safety: Arc-resistant design with interlock protection against switching errors.
  • High Reliability: Modern switching devices/materials ensure durability (Manufacturer: Infraenergo).
  • User-Friendly: Easy cable access + customizable configurations.

Technical specifications

  • Current Type & Frequency: AC, 50Hz;
  • Rated Current: Up to 630A; 
  • Busbar Current Rating: Up to 1000A; 
  • Main Circuit Operating Voltage: 400V, AC; 
  • Main Circuit Insulation Voltage: 500V;
  • Auxiliary Circuit Voltage: 500V;
  • Incoming Breaker Breaking Capacity:  Icu=65 kA;
  • Busbar Short-Circuit Withstand:  Icw=65kA 1s; 
  • Protection Rating: Up to IP54; 
  • Bus Sectioning Form: Up to 4b; 
  • Earthing System: TN-С, TN-C-S; 
  • Internal Separation: Type 1;
  • Functional Unit Connection: Type FFF.
 

Design:

Construction: Powder-coated steel frame with front-access doors. Grounding: PE busbar installed at the panel base. Cabling: Top-entry cable connections.

Compliance:

  • ST RK GOST R 51321.1-2010 (IEC 60439-1:2004);
  • TR CU 004/2011 (Low-Voltage Equipment Safety);
  • GOST 12.2.007.0, GOST R IEC 536.