What calculations does EcoSet Design perform?
1. Short-Circuit Currents
Short-circuit current is the high fault current that flows when a low-impedance path occurs (e.g., 3phase,2phase,1phase faults or phase-to-ground fault).
It is critical for:
Selecting circuit breaker breaking capacity
Ensuring equipment can withstand thermal and mechanical stress
Designing effective protection systems
Accurate calculation prevents equipment damage and ensures safe fault clearing.
2. Voltage Drop Across Circuits
Voltage drop is the reduction in voltage along a conductor due to resistance and impedance.
It increases with:
Cable length
Current magnitude
Conductor resistance
It must be limited to ensure:
Proper equipment operation
Energy efficiency
Compliance with standards
Excessive voltage drop reduces performance and system reliability.
3. Load Currents and Demand
Load current is the current drawn by connected loads, while demand is the maximum expected load at a given time.
Key factors:
Type of load (resistive/inductive)
Diversity factor
Peak vs average load
This helps in:
Proper sizing of transformers and cables
Avoiding overload
Efficient system design
4. Conductor Cross-Sectional Area
Conductor size (mm²) defines its current-carrying capacity.
Selection depends on:
- Load current
- Voltage drop limits
- Installation conditions
- Thermal capacity
Correct sizing ensures:
- Safe operation
- Reduced losses
- Compliance with standards
5. Protective Device Coordination & Selectivity
Coordination ensures protective devices operate in the correct sequence during faults.
Selectivity ensures:
- Complementary technical guide.
Methods:
- Time-based (delay settings)
- Current-based (trip curves)
Proper coordination improves reliability and prevents total shutdown.
Released for: Schneider Electric Thailand
