For low-voltage distribution equipment (low-voltage components, low-voltage switchgear, split mete ready board box, meter box, etc.), we can determine four maintenance strategies, namely, correction, prevention, risk-based and condition based maintenance. Which one should we choose? Its first and key task is to ensure the safety of equipment and assets

There are four basic types of maintenance strategies:

1. Corrective maintenance

Maintenance was carried out after detecting the abnormality of the split mete ready board box in order to restore normal working conditions. This approach is based on the firm belief that in the event of a failure, the cost of downtime and maintenance is lower than the investment required for the maintenance plan, and this strategy may be cost-effective before a catastrophic failure occurs

2. Preventive maintenance

The split mete ready board box shall be maintained at predetermined intervals or in accordance with the specified standards in order to reduce the risk of equipment failure or performance degradation. The maintenance cycle is planned according to the need to stop the equipment, which reduces the occurrence rate of operational failures

3. Risk based maintenance

Maintenance is carried out by combining analysis, measurement and regular testing activities with standard preventive maintenance. In the context of the environment, operation and process conditions of the equipment in the system, view the collected information for the purpose of performing asset condition and risk assessment and defining appropriate maintenance procedures. Refurbish or replace all devices that display abnormal values. In this way, the service life can be extended and the high level of reliability, safety and efficiency of the equipment can be guaranteed over time

4. Condition based maintenance

Maintenance is based on equipment performance monitoring and control of corrective actions taken. Through online detection of important working equipment parameters and automatic comparison with the average value and performance, the actual actual equipment condition can be continuously evaluated. Maintenance is performed when some indicators signal that the equipment is deteriorating and the probability of failure increases. In the long run, this strategy can greatly reduce the costs associated with maintenance, thereby minimizing the occurrence of serious failures and optimizing the management of available economic resources.

There is no doubt that the fourth strategy, condition based maintenance, can greatly reduce the maintenance cost and reduce the occurrence of failures, but it also has the highest requirements for the equipment. It needs to collect the equipment status awareness information in real time and compare it with the standard value to determine the health status of the equipment.

This is also an important topic in the digital transformation of components. At present, most low-voltage power distribution components cannot perceive the equipment status, so it is impossible to talk about predictive maintenance

3. Current Configuration - Incoming Circuit Breaker

We configure the loop current according to the national and local standards

Indoor incoming line is generally 10mm ²， The corresponding current range is 40A~63A, so the incoming circuit breaker is generally 40A, 50A, 63A, but should not exceed 63A.

The specific size of the incoming circuit breaker can be configured according to the size of the house or the load of the household.

If you are worried that the configuration is too small, you can directly configure it according to 63A.

4. Current Configuration - Lighting

The lighting belongs to the circuit with the lowest current in the branch circuit, and 1.5mm is generally configured ² Or 2.5mm ² The current range of conductor is 10A~25A.

Current value: 10A, 16A, 20A, 25A.

As most indoor lighting is AC220V, 10A current corresponds to 5KW lighting load, which is already very large. Therefore, 10A lighting circuit is generally recommended for users.

10A products can already meet most of the household lighting loads.

5. Current configuration - socket circuit

The socket belongs to the circuit with smaller branch lines, generally 2.5mm ² Conductor, the current range is 16A~25A.

Current value: 16A, 20A, 25A.

The specific current value can be selected according to the size of the house, and the number of sockets and loads.

The 16A and 20A products are relatively conventional configurations.