DUTY SERVICE

All Motive motors shown in this catalogue are made for S1 continuous duty service, as per IEC 34-1 norm. The duty service class is shown on the rating plate. Below are described the various types of service:

S1 - Continuous service:
operating at constant load of duration N in order to reach a thermal balance

S2 - Limited-duration service

S3 - Periodic intermittent service

S4 - Periodic intermittent service with start-up

S5 - Periodic intermittent service with electric braking

S6 - Uninterrupted periodic service with intermittent load

S7 - Uninterrupted periodic service with electric braking

S8 - Uninterrupted periodic service with correlated load and velocity variations

S9 - Service with non-periodic variations in load and speed


a = load
b = electric losses
c = temperature
d = time
N = steady load operating time
Tmax = max temperature achieved
WORKING CONDITIONS

HUMIDITY:
The electrical equipment must be able to work with a relative humidity between 30 and 95% (without condensation).
Damaging effects of occasional condensation must be avoided by adequate equipment design or, if necessary, by additional measures (for example, Motive offers anti-condensation heaters, drain holes, resin coated stators, and resin filled terminal boxes).

ALTITUDE AND TEMPERATURE:
The powers indicated are intended for regular use at altitudes below 1000 mt above sea level and a room temperature between +5°C and +40°C for motors having a rated power below 0.6 kW, or between -15°C and 40°C for motors having a rated power equal to or greater than 0.6 kW (IEC 34-1): For working conditions rather than those specified (higher altitude and/or temperature) the power decreases of 10% each 10°C of higher temperature, and of 8% for each 1000 mt of higher altitude.
It is not necessary to reduce the rated power if at an altitude higher than 1000mt and lower than 2000mt there is a max ambient temperature of 30°C or, in altitudes from 2000 mt to 3000mt there is a max ambient temperature of 19°C.

VOLTAGE - FREQUENCY:
The admitted variation of supply voltage and frequency is established by the norm EN60034-1
Within this tolerance del phi motors provide the rated power reported in the plate.

INSULATION:
The copper is impregnated with a double layer of H class insulating enamel to ensure high resistance to electrical, thermal and mechanical stress.
A NOMEX film that wraps entirely around the coil side insulates the copper and iron from one another.
The phases are further isolated by another layer of NOMEX to protect the motors from voltage peaks that usually occur when the motor is controlled by inverter.
In case that motors with more than 75kW are controlled by inverter, we recommend to request the electrically insulated bearing on the non drive end. Its purpose is to open the electric circuit between the rotor and the motor frame, thus preventing that the shaft currents go through the bearings and damage their balls surface and roll tracks.
The section "technical data" of this catalogue shows the max operating temperatures according to the Class insulation shown on the plate.
Delphi motors are designed to conserve wide margins against eventual overloads, having a temperature rise that is, at rated power, much lower than the operating temperature limit given by their insulation class. This fact increases considerably the motors life lenght. Such "ΔT" values are evidenced in the following performance charts. (see further details about temperature rise in the "technical data" section).