Safety and Protection Relays
Captech offers a range of electrical safety equipment including protection relays and fault monitoring devices to protect both people and infrastructure.
Surge protection minimises the risk of damage from lightning strikes, voltage and power surges and transient voltages by blocking or redirecting unwanted surge current to earth.
A surge or lightning protection device prevents damage to electrical equipment from over-voltage transient events by blocking or redirecting surge current to the ground instead of passing through the equipment.
Surge protection is connected to a conductor on the line side of equipment. The protection is also connected to ground and functions by routing energy from an over-voltage transient to ground if one occurs, while isolating the conductor from ground at normal operating voltages. A varistor is usually adopted to achieve this, as its resistance is variable for different voltage levels.