MasterPact MTZ 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.
MasterPact MTZ devices can operate under the following temperature conditions:
oElectrical and mechanical characteristics specified for an ambient temperature of -25 °C to +70 °C .
oCircuit-breaker closing specified down to -35 °C by manual operation with closing pushbutton.
Storage conditions are as follows:
o-40 °C to +85 °C for the device without the control unit.
o-25 °C to +85 °C for the control unit.
Extreme Atmospheric Conditions
MasterPact MTZ 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 |
MasterPact MTZ 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 3C3 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 |
|
Mechanically active substances |
Category 3S3 compliant with IEC 60721-3-3 |
Beyond these conditions, MasterPact MTZ devices must be installed inside switchboards with an IP rating equal to or greater than IP54.
MasterPact MTZ devices have successfully passed tests for the following vibration levels, in compliance with IEC 60068-2-6 and IEC 60068-2-27:
o2 Hz to 13.2 Hz: amplitude +/- 1 mm.
o13.2 Hz to 100 Hz: constant acceleration of 0.7 g.
Vibration testing to these levels is required by merchant marine inspection organizations (for example, Veritas, Lloyd’s).
MasterPact MTZ devices have also been successfully tested according to:
oAnnex Q - IEC 60947-1: Special tests – damp heat, salt mist, vibration and shock
oIEC 60947-1 - Category D: Environment subject to temperature, humidity and vibration
MasterPact MTZ devices are designed and tested to operate at altitudes below 2,000 m.
At altitudes above 2,000 m, the characteristics of the ambient air (electrical resistance, cooling capacity) lower product characteristics as follows:
|
Characteristics |
Altitude |
||||
|---|---|---|---|---|---|
|
2,000 m |
3,000 m |
4,000 m |
5,000 m |
||
|
Impulse withstand voltage Uimp (kV) |
12 |
11 |
10 |
8 |
|
|
Rated insulation voltage (Ui) (V) |
1,000 |
900 |
780 |
700 |
|
|
Maximum rated operational voltage 50/60 Hz Ue (V) |
MasterPact MTZ2/MTZ3 except H10 |
690 |
690 |
630 |
560 |
|
MasterPact MTZ2/MTZ3 H10 |
1,000 |
890 |
795 |
700 |
|
|
Rated current (A) at 40 °C |
1 x In |
0.99 x In |
0.96 x In |
0.94 x In |
|
NOTE: Intermediate values can be obtained by interpolation.
MasterPact MTZ devices have protection against:
oOvervoltages caused by devices that generate electromagnetic disturbance.
oOvervoltages caused by atmospheric disturbance or by a distribution-system outage (for example, a lighting system failure).
oDevices emitting radio waves (for example, radio transmitters, walkie-talkies, or radar).
oElectrostatic discharge produced by users.
MasterPact MTZ devices have successfully passed the electromagnetic-compatibility tests (EMC) defined by the following international standards:
oIEC 60947-2, appendix F.
oIEC 60947-2, appendix B (control units with earth-leakage function).
The devices have passed the above tests and therefore:
oNo nuisance tripping occurs.
oTripping times are respected.
