TS EN IEC 60375

TS EN IEC 60375 is the standard that addresses how signs, reference directions, and reference polarities are defined for currents and voltages in electric networks. In circuit analysis, these conventions help ensure that measurements, equations, and diagrams are interpreted consistently, especially in systems with multiple sources, multiple branches, or bidirectional power flow.

A common notation language for current and voltage

The standard concerns not the symbols for electrical quantities themselves, but the rule used to assign a direction and sign to those quantities. In general technical practice, the chosen reference for a current branch, the terminals used to define voltage, and conventions such as the passive sign convention are essential for keeping schematics, calculations, and documentation aligned. This reduces the risk of different drawing practices leading to different interpretations of the same circuit.

Why the conventions matter in electrical networks

Such conventions are important in power systems, electronic circuits, and measurement setups because they make modeling and communication more reliable. The same physical element can be described with different sign choices, but if the reference direction and polarity are not stated clearly, the interpretation of power, energy, and signal flow becomes error-prone. TS EN IEC 60375 provides a common basis for using electrical signs consistently in technical drawings and calculations.

• Defining reference directions for electric current and voltage
• Linking positive and negative signs to a clear convention
• Making polarity definitions consistent across electric networks
• Supporting the same interpretation in circuit diagrams and technical documentation