Operating Conditions
Introduction
EasyPact MVS devices are designed and tested for operation in industrial atmospheres. It is recommended that equipment is cooled or heated to the proper operating temperature and kept free of excessive vibration and dust.
Ambient Temperature
EasyPact MVS devices can operate under the following temperature conditions:
-
Electrical and mechanical characteristics specified for an ambient temperature of -25 °C to +70 °C.
-
Device closing specified down to -35 °C by manual operation with closing pushbutton.
Storage condition is: -40 °C to +85 °C for the device with the trip system.
Extreme Atmospheric Conditions
EasyPact MVS devices have successfully passed tests for extreme atmospheric conditions, defined by the following standards:
|
Standard |
Title |
|---|---|
|
IEC 60068-2-1 |
Dry cold, at -40 °C |
|
IEC 60068-2-2 |
Dry heat, at +85 °C |
|
IEC 60068-2-30 |
Damp heat (temperature +55 °C, relative humidity 95%) |
|
IEC 60068-2-52 level 2 |
Salt mist |
Industrial Environments
EasyPact MVS devices can operate in the industrial environments defined by IEC 60947 (pollution degree up to 3).
It is advisable to check that devices are installed in suitably cooled switchboards without excessive dust.
|
Conditions |
Standard |
|---|---|
|
Corrosive industrial atmospheres |
Category 3C2 compliant with IEC 60721-3-3 |
|
Sea salts 0.8 to 8 mg/m² day average over the year |
Compliant with IEC 60721-2-5 |
Beyond these conditions, EasyPact MVS devices must be installed inside switchboards with an IP rating equal to or greater than IP54.
Vibration
EasyPact MVS devices have successfully passed tests for the following vibration levels, in compliance with IEC 60068-2-6 and IEC 60068-2-27:
-
2 Hz to 13.2 Hz: amplitude +/- 1 mm.
-
13.2 Hz to 100 Hz: constant acceleration of 0.7 g.
Vibration testing to these levels is required by merchant marine inspection organizations (for example, Lloyd’s).
EasyPact MVS devices have also been successfully tested according to:
-
Annex Q - IEC 60947-1: Special tests – damp heat, salt mist, vibration and shock
-
IEC 60947-1 - Category D: Environment subject to temperature, humidity and vibration
Altitude
EasyPact MVS devices are designed and tested to operate at altitudes below 2000 m.At altitudes above 2000 m, the characteristics of the ambient air (electrical resistance, cooling capacity) lower the product characteristics as follows:
|
Characteristics |
Altitude |
||||
|---|---|---|---|---|---|
|
2000 m |
3000 m |
4000 m |
5000 m |
||
|
Impulse withstand voltage Uimp (kV) |
12 |
11 |
10 |
8 |
|
|
Rated insulation voltage (Ui) (V) |
1000 |
900 |
780 |
700 |
|
|
Maximum rated operational voltage 50/60 Hz Ue (V) |
690 |
690 |
630 |
560 |
|
|
Rated current (A) at 40 °C |
1 x In |
0.99 x In |
0.96 x In |
0.94 x In |
|
Electromagnetic Disturbances
EasyPact MVS devices have protection against:
-
Overvoltages caused by devices that generate electromagnetic disturbance.
-
Overvoltages caused by atmospheric disturbance or by a distribution-system outage (for example, a lighting system failure).
-
Devices emitting radio waves (for example, radio transmitters, walkie-talkies, or radar).
-
Electrostatic discharge produced by users.
EasyPact MVS devices have successfully passed the electromagnetic-compatibility tests (EMC) defined by the IEC 60947-2, appendix F international standard.
The devices have passed the above tests and therefore:
-
No nuisance tripping occurs.
-
Tripping times are respected.