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16 Posts in this encyclopedia categoryOffset solder joints
Staggered soldering is used for solder joints that go over several cores or individual wires so that any tensile forces occurring are distributed over the solder joints. In this way, any thickening of the insulation is distributed over a larger distance. (All information without guarantee)
Operating capacity
For cable circuits with quad, pair and phantom: is the capacitance between the cores a and b of these cable circuits. For a core: is the capacitance between a conductor and all other connected conductors of a cable. (All data without guarantee)
Operating current
The maximum permissible current that may be transmitted. (All data without guarantee)
Operating resources
All objects that are used in the application of electrical energy, e.g. switches, motors and wires. (All information without guarantee)
Operating temperature
The range between the lower and upper temperature limits that can be used by the user. (All data without guarantee)
Operating voltage
The actual current voltage in a grid. It can fluctuate by up to 5% due to the changing utilisation of current consumers. (All data without guarantee)
Outdoor cable
These cable types are suitable for outdoor installation in the ground, in pipes, in the air, in rivers, lakes, in mining, on ships, indoors, in various industrial plants, etc. The cable structure depends on the required electrical, mechanical, thermal, chemical installation and operating conditions.
Outer jacket
Closed cover to protect the superstructure elements underneath. (All information without guarantee)
Overcurrent
If the permissible current carrying capacity is exceeded, this is referred to as overcurrent. (All data without guarantee)
Overcurrent protection devices
Overcurrent protection devices interrupt the power supply in the event of an overcurrent. These are, for example, overcurrent circuit breakers and fuses. (All information without guarantee)
Overload currents
Overload currents occur when end devices unexpectedly draw a higher current than the intended rated current. Such situations arise, for example, due to a blocked drive. Temporary starting currents of machines are also overload currents. Although they are generally calculable, they can vary depending on the load on the machine at the moment of starting. These conditions must be taken into account when selecting suitable fuses or circuit breakers for such circuits. A safe switch-off should take place in the seconds to lower minutes range. (All data without guarantee)
Overvoltage
Overvoltages only occur for a fraction of a second. They are therefore also known as transient voltages or transients for short. They have very short rise times of a few microseconds before dropping again comparatively slowly over a period of up to 100 microseconds. Overvoltages are caused by the following events: Lightning discharges, switching operations, electrostatic discharges. (All data without guarantee)
Overvoltage category
Assignment of electrical equipment to the expected overvoltage. Overvoltage categories I; II; III; IV are used. (All information without guarantee)
Oxygen index
Percentage of oxygen in the ambient air that is necessary to maintain combustion after a flame has been removed. As the natural proportion of oxygen in the air is approx. 23 per cent, substances with an oxygen index greater than 24 will generally extinguish themselves when the flame is removed. This term is particularly common for halogen-free wires and cables. (All data without guarantee)