Main, emergency off and repair switches

A manually operated main switch must be provided for each mains feed in order to disconnect the machine's electrical equipment from the mains (e.g. when work on the electrical equipment is to be done).

• Designed as a circuit breaker as per EN 60947-3 for category of use AC-23B
• Manually operable with just one On and one Off position, which are clearly marked 0 and I
• Visible isolating distance or position indicator, which can only indicate the Off position when a sufficient isolating distance as per EN 60947-3 exists between all contacts
• Handle in black or grey
• Can be locked in the Off position, e.g. with padlocks
• Handle for the main switch easily accessible between 0.6 and 1.9m above the access level
• Sufficient breaking capacity to cut off the largest motor's current when stalled along with the total of all other motors' and/or consumer units' operating currents.

D series main / emergency off switches

At every control point and workplace where an emergency-off function is required, such devices must be present. They must mechanically snap into place automatically and be positioned where they can be easily reached.

DL series main / emergency off switches

DL switches fulfil the circuit-breaking conditions as per EN for 1000V.

The terminals have individual terminal clamp covers for cable lug and power bus connection on the mains input side. The DHV twin-lever handle has a locking mechanism for 4 padlocks.

The switches can also be supplied in 4-pole format with switchable neutral conductor and an auxiliary switch.

DL series cam circuit breakers fulfil the requirements made by DIN EN 60204 Part 1, clause 5.3 of manually operated main switches. It stipulates that a circuit breaker compliant with EN 60947-3 must be designed for category of use AC-23B.

S series main / emergency-off switch with low-voltage circuit breaker

Elektra S series main switches with a low voltage circuit breaker provide protection against automatic restarting when power is restored following a power cut. They fulfil the requirements of DIN EN 60204 Part 1, clause 7.5 by means of a low-voltage circuit breaker coil, which has a mechanism that after any power cut causes the switch to jump back into the 0 position. If there is no power, the switch cannot be turned on.

Additional equipment

• Power bus connection
• Extra terminal clamp for control current circuit
• Auxiliary contacts' function