DutyType provides a rated operating mode of a motor. The duty types are defined in the international standard IEC 60034-1. Some of these duty types can specify the load profile in more detail by means of limit value specifications. The values of the MultiStateValueDiscreteType variable are defined in Table 74 and shall be used. Additional values will be added in the specification. Manufacturer-specific extensions are not foreseen.
Table 74 – PtMotorDutyAttributesType Attribute values for child Nodes
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BrowsePath |
Value Attribute |
Description Attribute |
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[ { "Value": 0, "DisplayName": "S1", "Description": "Continuous duty" }, { "Value": 1, "DisplayName": "S2", "Description": "Short-time duty" }, { "Value": 2, "DisplayName": "S3", "Description": "Intermittent periodic duty" }, { "Value": 3, "DisplayName": "S4", "Description": "Intermittent periodic duty with starting" }, { "Value": 4, "DisplayName": "S5", "Description": "Intermittent periodic duty with electric braking" }, { "Value": 5, "DisplayName": "S6", "Description": "Continuous operation with intermittent load" }, { "Value": 6, "DisplayName": "S7", "Description": "Continuous operation periodic duty with electric braking" }, { "Value": 7, "DisplayName": "S8", "Description": "Continuous operation with periodic changes in load and speed" }, { "Value": 8, "DisplayName": "S9", "Description": "Duty with non-periodic load and speed variations" }, { "Value": 9, "DisplayName": "S10", "Description": "Duty with discrete constant loads and speeds" } ] |
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LoadProfile provides a description for a duty type specific load profile according to IEC 60034-1. The load profiles may be described in a string array e.g. for the duty type S8. Clients should be aware of this. Examples are mentioned in Table 75.
Table 75 – Examples of Duty Type Load Profiles
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DutyType |
LoadProfile-Example |
LoadProfile -Description |
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S1 |
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Continuous duty |
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S2 |
60 min |
Short-time duty |
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S3 |
25 % |
Intermittent periodic duty |
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S4 |
25 % Jm = 0,15 kg x m² Jext = 0,7 kg x m² |
Intermittent periodic duty with starting |
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S5 |
25 % Jm = 0,15 kg x m² Jext = 0,7 kg x m² |
Intermittent periodic duty with electric braking |
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S6 |
40 % |
Continuous operation with intermittent load |
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S7 |
Jm = 0,15 kg x m² Jext = 0,7 kg x m² |
Continuous operation periodic duty with electric braking |
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S8 |
Jm = 0,15 kg x m² Jext = 0,7 kg x m² 16 kW 740 min-1 30 % 40 kW 1460min-1 30 % 25 kW 980 min-1 40 % |
Continuous operation with periodic changes in load and speed |
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S9 |
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Duty with non-periodic load and speed variations |
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S10 |
p/dt= 1,1/0,4; 1/0,3; 0,9/0,2; r/0,1 TL = 0,6 |
Duty with discrete constant loads and speeds |