7.8.7.2 Object Description

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
BrowsePath Value Attribute Description Attribute
[
{
"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"
}
]

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
DutyType LoadProfile-Example LoadProfile -Description
S1Continuous duty
S260 minShort-time duty
S325 %Intermittent periodic duty
S425 % Jm = 0,15 kg x m² Jext = 0,7 kg x m²Intermittent periodic duty with starting
S525 % Jm = 0,15 kg x m² Jext = 0,7 kg x m²Intermittent periodic duty with electric braking
S640 %Continuous operation with intermittent load
S7Jm = 0,15 kg x m² Jext = 0,7 kg x m²Continuous operation periodic duty with electric braking
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
S9Duty with non-periodic load and speed variations
S10p/dt= 1,1/0,4; 1/0,3; 0,9/0,2; r/0,1 TL = 0,6Duty with discrete constant loads and speeds