Maintenance And Inspection; Repair And Modification - Mitsubishi Electric MELPRO A Series Instruction Manual

Numerical protection relay
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*The equipment must only be operated and handled by qualified personnel. Otherwise, there are risks of electric shock,
injury, failure, malfunction, and maloperation.
*Handling and maintenance of the equipment must only be carried out after gaining a thorough understanding of the
instruction manual. Otherwise, there is the risk of electric shock, injury, failure, malfunction, or maloperation.
*While energized, do not remove any components other than those which have been designated. Otherwise, there is a risk
of failure, malfunction, or maloperation.
Caution
*While energized, do not draw out the internal unit (subunit). Otherwise, there is a risk of electric shock, injury, failure,
malfunction, or maloperation.
*When changing the setting value during the energized state, ensure that all trip circuits are locked in order not to operate.
Otherwise, there is a risk of malfunction.
*Use in rated range. Otherwise, there is a risk of malfunction.

3. Maintenance and Inspection

We recommend that any tests or inspections are carried out under the following conditions, as well as any additional conditions
described in the instruction manual.
・Ambient temperature
・Relative humidity
・External magnetic field
・Atmospheric pressure
・Mounting angle
・Frequency
・Waveform (in the case of AC)
・AC component (in the case of DC)
・Auxiliary power supply voltage
*The equipment must only be operated and handled by qualified personnel. Otherwise, there are risks of electric shock,
injury, failure, malfunction, and maloperation.
*Handling and maintenance of the equipment must only be carried out after gaining a thorough understanding of the
instruction manual. Otherwise, there is the risk of electric shock, injury, failure, malfunction, or maloperation.
*When replacing the equipment, use a product of same model, rating, and specifications. Otherwise, there is the risk of
Caution
failure or fire.. If any other product is to be used, the manufacturer must be consulted.
*Do not exceed the overload capacity for voltage and current. Otherwise,equipment failure or fire could occur.
*Do not touch any live parts, such as terminals, etc. Otherwise, there is a risk of electric shock.
*Do not clean the equipment while energised. When the cover needs to be cleaned, make use of a damp cloth.
4. Transportation
*Transport the equipment in the correct orientation.
*Do not apply excessive shock and/or vibration as this could affect the performance and life of the product.
5. Storage
The storage environment shall comply with the following conditions. Otherwise, there is a risk of reducing the performance and
life of the product.
・Ambient temperature
・Relative humidity
・Altitude
・The equipment must not be exposed to abnormal vibration, shock, inclination, or magnetic fields.
・The equipment must not be exposed to harmful smoke/gas, saline gas, water droplets or vapor, excessive dust or fine
powder, explosive gas or fine powder, wind & rain.

6. Repair and Modification

*When carrying out repair and/or modification, please consult with the manufacturer in advance. We will not take any
responsibility for any repair and/or modification (including software) which has been carried out without prior consent.
7. Disposal
Disposal must take place in accordance with the applicable legislation
20±10℃
90% or less
80A/m or less
86~106×10
3
Pa
Regular direction ±2°
Rated frequency ±1%
Distortion factor: 2% or less
Effective value of higher harmonics only
Distortion factor=────────────────────────────── ×100(%)
Effective value of fundamental wave
Ripple factor: 3% or less
Max. value – Min. value
Ripple factor=─────────────────────── ×100(%)
Average value of DC
Rated voltage ±2%
–20 to +60℃
(under the state where dew condensation or freezing does not occur)
30 to 80% on daily average
2000m or lower
3
JEP0-IL9556

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Melpro melpro muv-a3v-rMelpro muv-a3v-rd

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