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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