LEGRAND DMX3 Operating manual

January 18

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The use of mechanical operation counter is suggested

to ease the planning and scheduling of periodical

maintenance of the product.

Maintenance and periodical checks are intended to be

performed by training and qualified people.

Use only original and authorized spare parts and accessories.

Before to start, please follow the safety recommendations

listed below:

- Disconnect device from its supply. Any device part

has to be on voltage (power or auxiliary circuitry);

please verify insulation.

- Breaker must be in OPEN status, with its spring

discharged (OFF- DISCHARGED).

- Be sure that the breaker has no residual heating to

avoid injuries.

For correct device handling, please refer to device

instruction sheets.

Injuries and serious damages to devices could arise if

previous indications will not be followed.

During maintenance activities described in this manual,

people in charge of the work must ensure the safety for

people and devices, using every tool and procedure

needed for that.

Before to start, please verify that:

- All connections are tightened with the right torque.

- All protective covers are mounted in the right way.

- The breaker is in OFF-DISCHARGED status.

It’ s recommended to use the original maintenance kit.

It’ s recommended to save and store every maintenance

action done on every device.

In any circumstance, Legrand will never be considered

responsible on device damages if periodical maintenance

actions will be done not following indications contained

in this manual.

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Each time the product is used/installed in conditions

different by IEC standards, it’ s recommended to plan

and schedule a periodical maintenance (according to

this manual), in order to:

- Verify product goodness.

- Identify damaged parts and/or accessories.

- Organize preventive actions to avoid emergencies.

It’ s recommended to save and store every maintenance

action done on every device.

In the following tables it will be possible to find all Level 1

and Level 2 maintenance action and suggested frequency.

In particular, Level 1 actions (completely explained in this

manual) can be performed by trained technicians.

For Level 2 actions, please contact Legrand Service support.

Level 1 maintenance

This maintenance level is intended to be performed

by trained and qualified technicians, confident with

safety standard requirements for circuit breakers on

distribution systems. All these procedures are explained

in this manual.

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Releases stroke P-NP check

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