N.1 Load profile...2 N.1.1 Section 50 ...2 N.1.1.1 Morning shifts ...2 N.1.1.2 Afternoon shifts ...4 N.1.2 Section 51 ...6 N.1.2.1 Morning shifts ...6 N.1.2.2 Afternoon shifts ...9 N.2 Histogram ...12 N.2.1 Section 50 ...13 N.2.1.1 Morning shifts ...13 N.2.1.2 Afternoon shifts ...15 N.2.2 Section 51 ...17 N.2.2.1 Morning shifts ...17 N.2.2.2 Afternoon shifts ...19 N.3 Thermal capacity ...21 N.3.1 Section 50 ...21 N.3.1.1 Morning shifts ...21 N.3.1.2 Afternoon shifts ...22 N.3.2 Section 51 ...23 N.3.2.1 Morning shifts ...23 N.3.2.2 Afternoon shifts ...25

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APPENDIX N

SHUTTLE CAR CONVEYOR MOTOR

Typical nameplate data for the conveyor motor of a Shuttle car can be seen in Table N-1. The conveyor motor measured at both sections was a 9.5 / 19 kW two speed induction motor. The motor is normally connected to the fast speed which is the mean that the motor is rated to consume 15 A at full load

Table N-1: Nameplate data of the conveyor motor on a SC.

Table N-2: Production figures for shifts that the conveyor motor was investigated.

Date Morning Afternoon Morning Afternoon

20-Jun-2005 1200 1890 - -21-Jun-2005 2030 2320 - -4-Jul-2005 - - 1800 2124 Sect 51 Sect 50 Power 19 / 9.5 kW Voltage 950 V Duty S1 Current 15 A Ins class H RPM 1390 / 695 pf 0.86

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N.1 LOAD PROFILE

The next section focuses on the load profiles of the conveyor motor. Each graph shows the line voltage and the voltage limits, the load current and full load current capacity of the conveyor motor. The morning shifts and afternoon shifts are separated as well as the measurements made at the different sections.

N.1.1 SECTION 50

N.1.1.1 Morning shifts

Figure N.1-1: Load current and voltage for a conveyor motor – 04 July 2005.

0 200 400 600 800 1000 1200 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30 2:30 Time (hh:mm) Li ne V ol ta ge (V ) 0 10 20 30 40 50 60 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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Figure N.1-2: Load current and voltage for a conveyor motor – 04 July 2005 (30 minute period).

0 200 400 600 800 1000 1200 9:00 9:05 9:10 9:15 9:20 9:25 9:30 Time (hh:mm) Li ne V ol ta ge (V ) 0 10 20 30 40 50 60 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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N.1.1.2 Afternoon shifts

Figure N.1-3: Load current and voltage for a conveyor motor – 04 July 2005.

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Figure N.1-4: Load current and voltage for a conveyor motor – 04 July 2005 (30 minute period).

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N.1.2 SECTION 51

Figure N.1-5: Load current and voltage for a conveyor motor – 20 June 2005.

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Figure N.1-6: Load current and voltage for a conveyor motor – 20 June 2005 (30 minute period).

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N.2 HISTOGRAM

The next section focuses on the frequency with which a Shuttle cars conveyor motor consumed a certain load power and current. The graphs show the number of times a certain power or current has been consumed. The tables give data about the tonnes produced during the shift and the percentage time of the shift that the motors were producing. The time that the motors have been over loaded or loaded within the full load rating of the motor is given as a percentage of the actual producing time. The morning shifts and afternoon shifts are separated as well as the measurements made at the different sections.

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N.2.1 SECTION 50

Table N-3: Data for the total consumption of a conveyor motor in section 50.

Figure N.2-1: Histogram for power consumed by a conveyor motor.

04-Jul-05

Tonnes/CM/Shift 1800

% Time of shift producing 11.87% % of Production time underloaded 55.35% % of Production time overloaded 44.65%

0 100 200 300 400 500 600 0 1 2 3 4 5 6 7 8 9 _{10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27} Power bins (kW) Fr eq ue nc y 4-Jul-05

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Figure N.2-2: Histogram for current consumed by a conveyor motor. 0 100 200 300 400 500 600 0 1 2 3 4 5 6 7 8 9 _{10 11 12 13 14 15 16 17 18 19 20 21 22}

Current bins (A)

Fr eq ue nc y 04-Jul-05

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Table N-4: Dat Data for the total consumption of a conveyor motor in section 50.

04-Jul-05

Tonnes/CM/Shift 2124

% Time of shift producing 18.09% % of Production time underloaded 63.28% % of Production time overloaded 36.72%

0 100 200 300 400 500 600 0 1 2 3 4 5 6 7 8 9 _{10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27} Power bins (kW) Fr eq ue nc y 4-Jul-05

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Fr eq ue nc y 04-Jul-05

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N.2.2 SECTION 51

Table N-5: Data for the total consumption of a conveyor motor in section 51.

20-Jun-05 21-Jun-05

Tonnes/CM/Shift 1200 2030

% Time of shift producing 11.54% 17.09% % of Production time underloaded 89.38% 82.91% % of Production time overloaded 10.62% 17.09%

0 100 200 300 400 500 600 0 1 2 3 4 5 6 7 8 9 _{10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27} Power bins (kW) Fr eq ue nc y 20-Jun-05 21-Jun-05

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Fr eq ue nc y 20-Jun-05 21-Jun-05

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Table N-6: Dat Data for the total consumption of a conveyor motor in section 51.

20-Jun-05 21-Jun-05

Tonnes/CM/Shift 1890 2320

% Time of shift producing 14.61% 17.59% % of Production time underloaded 82.04% 78.82% % of Production time overloaded 17.96% 21.18%

0 100 200 300 400 500 600 0 1 2 3 4 5 6 7 8 9 _{10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27} Power bins (kW) Fr eq ue nc y 20-Jun-05 21-Jun-05

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Fr eq ue nc y 20-Jun-05 21-Jun-05

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N.3 THERMAL CAPACITY

The next section focuses on the temperature of the windings of the conveyor motor. Each graph shows the temperature of the motor, the load current and rated full load current of the motor. The morning shifts and afternoon shifts are separated as well as the measurements made at the different sections. The thermal time constant is 30 minutes.

N.3.1 SECTION 50

Figure N.3-1: Load current and motor temperature for a conveyor motor – 04 July 2005. 0 10 20 30 40 50 60 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30 2:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 70 80 90 100 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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Figure N.3-2: Load current and motor temperature for a conveyor motor – 04 July 2005. 0 10 20 30 40 50 60 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 70 80 90 100 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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N.3.2 SECTION 51

Figure N.3-3: Load current and motor temperature for a conveyor motor – 20 June 2005. 0 10 20 30 40 50 60 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30 2:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 70 80 90 100 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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TABLE OF CONTENTS