Professional Custom Power Distribution Box Solutions

Option 1  

Main Breaker with Leakage Protection

Option 2  

Group Leakage Protection

Option 3  

Single-Circuit Leakage Protection

Protection Scope

All Circuits  

Group Circuits

Independent Circuits

Power Supply Reliability

★★★★★

★★★★★

★★★★★

Fault Diagnosis

★☆☆☆☆

★★★☆☆

★★★★★

Cost

★☆☆☆☆

★★★☆☆

★★★★★

Configuration Method

Only one residual current device (RCD) is installed at the main incoming switch in the distribution box. This main RCD monitors the total current of all downstream branches.

After the main switch without a residual current device (RCD), install an independent RCD for each functional group (e.g., lighting area, sound area, LED screen area, special effects area). Each group's RCD only monitors a few branch circuits within its group (normally six circuits per group).

After the main switch (without residual current protection), each output circuit (each socket or each output) is equipped with an independent residual current device (usually RCBO, which is a combination of residual current protection and miniature circuit breaker).

Working Principle

Main residual current circuit breaker → Multiple miniature circuit breakers (MCBs) → Each output socket

Main switch → [Group 1 RCSM → Several MCBs] / [Group 2 RCSM → Several MCBs] / ……

Main switch → Residual current circuit breaker 1 → Socket 1 / Residual current circuit breaker 2 → Socket 2 / .

Advantages

1. Lowest cost:

Only one residual current device (RCD) is needed, resulting in low equipment cost.

2. Simple structure: Wiring is clear and maintenance is intuitive.

1. Group Fault Isolation, Reliable Power Supply: 

When a leakage occurs in a group of equipment (such as lighting), only the residual current device (RCD) of that group trips, cutting off the faulty circuit. Power supply to other groups re

2. Rapid Fault Localization:

After tripping, the functional area where the fault occurred can be immediately located, significantly shortening troubleshooting time..  

3. Ensures Safety and Stable Power Supply:

Provides reliable power supply while ensuring safety.

1. Highest Fault Isolation Precision and Maximum Power Supply Reliability:

A fault in a single device or socket only disconnects that specific circuit, minimizing the impact and virtually eliminating interference with other devices.

2. Most Accurate Fault Localization:

Tripping immediately pinpoints the original fault location, enabling extremely rapid troubleshooting

3. Individual Circuit Management:  

Offers the most flexible configuration; each circuit can be independently controlled and managed.

Disadvantages

1. Poor Reliability, Prone to False Tripping:

Even minor leakage in any branch circuit or equipment may cause a trip, leading to power outages and performance interruptions.  

2. Difficult Fault Diagnosis:  

After a trip, all branches and devices must be checked one by one to find the fault, which is very time-consuming. highly time-consuming.

★★ Special Note: EPTE's main circuit breaker with leakage protection can optionally disable the leakage protection function to ensure the smooth operation of the performance.

1. Higher Cost:  

Requires multiple groups of residual current devices (RCDs). 

2. Still Involves a Certain Scope of Power Outage:  

A single RCD may contain multiple devices; a tripping of that group will disconnect all devices within the group.

1. Highest Cost:

Requires a large number of RCBO modules.

2. Heavier Enclosure:  

For the same number of circuits, the enclosure may be heavier and larger.

Applicable Scenarios

1. Small-scale, temporary activities with extremely low requirements for power supply continuity.

2. Or as a supplement to other solutions.

1. Medium to large-scale performances.

2. Fixed installations in theaters, etc.

1. Large-scale, high-profile performances.

2. Large-scale television variety show productions.

3. Key mission scenarios.