DCDB: Array Junction Box, DC Distribution Box

Array Junction Box (AJB) also known as DCDB (Direct Current Distribution Box), component of an electricity supply system which divides an electrical power feed into subsidiary circuits, while providing a protective fuse or circuit breaker for each circuit.  DCDB controls the DC power from Solar Panels and with having necessary surge protection device (SPD) and fuses to protect the solar panels strings and solar inverter from any type of damage. All switches at the circuit breakers, connectors confirm to IEC 60947, part I, II and III.

Solar DC Distribution Box
Solar DCDB (Direct Current Distribution Box)

ACDB: AC Distribution Box, AC Junction Box

The ACDB (Alternative Current Distribution Box) receives the AC power from the solar inverter and directs it to AC loads through the distribution board. ACDB includes necessary surge protection device (SPD) and MCCB to protect the solar inverter from any type of damage or heavy voltage. Specifications of ACDB may change as per load or inverter capacity. ACDB provided at the cable terminating point emanating from 5 KVA Solar Inverter for interconnection control of dedicated electrical loads.

Solar AC Distribution Box
Solar ACDB (Alternative Current Distribution Box)

Technical Specification

Sl No Features  Solar DCDB Solar ACDB
 1 Ambient -10 to 60 Degree C -10 to 60 Degree C
 2 Type of Enclosure IP66 Polycarbonate Material IP66 Polycarbonate Material
 3 Inputs/Outputs 1 in 1 Out, 2 in 2 Out, 3 in 3 Out, 4 in 4 Out Single Phase ACDB, 3 Phase DCDB
 4 AC Switching 600/1000/1500VDC Disconnection MCCB/MCB Based AC Disconnection
 5 Surge Protection DC SPD Type 2, Fuse with or without Indications AC SPD Type 2
 6 Box / Top Cover Opaque/Transparent Opaque/Transparent