Q.1 Load profile...2 Q.1.1 Section 21 ...2 Q.1.1.1 Morning shifts ...2 Q.1.1.2 Afternoon shifts ...6 Q.1.2 Section 51 ...10 Q.1.2.1 Morning shifts ...10 Q.1.2.2 Afternoon shifts ...12 Q.2 Histogram ...14 Q.2.1 Section 21 ...15 Q.2.1.1 Morning shifts ...15 Q.2.1.2 Afternoon shifts ...17 Q.2.2 Section 51 ...19 Q.2.2.1 Morning shifts ...19 Q.2.2.2 Afternoon shifts ...20 Q.3 Thermal capacity ...21 Q.3.1 Section 21 ...21 Q.3.1.1 Morning shifts ...21 Q.3.1.2 Afternoon shifts ...23 Q.3.2 Section 51 ...25 Q.3.2.1 Morning shifts ...25 Q.3.2.2 Afternoon shifts ...26

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APPENDIX Q

FEEDER BREAKER CONVEYOR MOTOR

Typical nameplate data for the conveyor motor of a Feeder breaker can be seen in Table Q-1. The conveyor motor measured at both sections was a 55 kW induction motor with a full load current rating of 39 A.

Table Q-1: Nameplate data of the conveyor motor on a Feeder breaker.

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

Date Morning Afternoon Morning Afternoon

31-May-2005 1782 1716 - -1-Jun-2005 1254 1980 - -2-Jun-2005 1320 2145 - -28-Jun-2005 - - 2204 1740 Sect 21 Sect 51 Power 55 kW Voltage 1000 V Duty S1 Current 39 A Ins class H RPM 1475 pf 0.87

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Q.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.

Q.1.1 SECTION 21

Q.1.1.1 Morning shifts

Figure Q.1-1: Load current and voltage for a conveyor motor – 31 May 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 3:30 Time (hh:mm) Li ne V ol ta ge (V ) 0 25 50 75 100 125 150 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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Figure Q.1-2: Load current and voltage for a conveyor motor – 31 May 2005 (30 minute period).

Figure Q.1-3: Load current and voltage for a conveyor motor – 01 June 2005.

0 200 400 600 800 1000 1200 9:30 9:35 9:40 9:45 9:50 9:55 10:00 Time (hh:mm) Li ne V ol ta ge (V ) 0 25 50 75 100 125 150 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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 3:30 Time (hh:mm) Li ne V ol ta ge (V ) 0 25 50 75 100 125 150 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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Figure Q.1-4: Load current and voltage for a conveyor motor – 01 June 2005 (30 minute period).

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 25 50 75 100 125 150 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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Q.1.1.2 Afternoon shifts

Figure Q.1-7: Load current and voltage for a conveyor motor – 31 May 2005.

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Figure Q.1-8: Load current and voltage for a conveyor motor – 31 May 2005 (30 minute period).

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0 200 400 600 800 1000 1200 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 Time (hh:mm) Li ne V ol ta ge (V ) 0 25 50 75 100 125 150 C ur re nt (A ) Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

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Q.1.2 SECTION 51

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Q.2 HISTOGRAM

The next section focuses on the frequency with which a Feeder breakers 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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Q.2.1 SECTION 21

Table Q-3: Data for the total consumption of a conveyor motor in section 21.

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

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0 2 4 6 8 _{10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40} Power bins (kW) Fr eq ue nc y 31-May-05 1-Jun-05 2-Jun-05

31-May-05 1-Jun-05 2-Jun-05

Tonnes/CM/Shift 1782 1254 1320

% Time of shift producing 74.22% 50.08% 58.24% % of Production time underloaded 100.00% 100.00% 100.00% % of Production time overloaded 0.00% 0.00% 0.00%

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Figure Q.2-2: Histogram for current consumed by a conveyor motor. 0 1500 3000 4500 6000 7500 9000 10500 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}

Current bins (A)

Fr eq ue nc y 31-May-05 01-Jun-05 02-Jun-05

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Figure Q.2-3: Histogram for power consumed by a conveyor motor.

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0 2 4 6 8 _{10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40} Power bins (kW) Fr eq ue nc y 31-May-05 1-Jun-05 2-Jun-05

31-May-05 01-Jun-05 02-Jun-05

Tonnes/CM/Shift 1716 1980 2145

% Time of shift producing 72.91% 84.52% 63.90% % of Production time underloaded 100.00% 100.00% 100.00% % of Production time overloaded 0.00% 0.00% 0.00%

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Figure Q.2-4: Histogram for current consumed by a conveyor motor. 0 1500 3000 4500 6000 7500 9000 10500 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}

Fr eq ue nc y 31-May-05 01-Jun-05 02-Jun-05

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Q.2.2 SECTION 51

Figure Q.2-5: Histogram for current consumed by a conveyor motor. 28-Jun-05

Tonnes/CM/Shift 2204

% Time of shift producing 98.32% % of Production time underloaded 100.00% % of Production time overloaded 0.00%

0 1500 3000 4500 6000 7500 9000 10500 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}

Fr eq ue nc y 28-Jun-05

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Figure Q.2-6: Histogram for current consumed by a conveyor motor. 28-Jun-05

Tonnes/CM/Shift 1740

% Time of shift producing 91.83% % of Production time underloaded 100.00% % of Production time overloaded 0.00%

0 1500 3000 4500 6000 7500 9000 10500 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}

Fr eq ue nc y 28-Jun-05

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Q.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 45 minutes.

Q.3.1 SECTION 21

Figure Q.3-1: Load current and motor temperature for a conveyor motor – 31 May 2005. 0 25 50 75 100 125 150 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30 2:30 3:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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Figure Q.3-2: Load current and motor temperature for a conveyor motor – 01 June 2005.

Figure Q.3-3: Load current and motor temperature for a conveyor motor

0 25 50 75 100 125 150 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30 2:30 3:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C) 0 25 50 75 100 125 150 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 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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Figure Q.3-4: Load current and motor temperature for a conveyor motor – 31 May 2005. 0 25 50 75 100 125 150 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 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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Figure Q.3-5: Load current and motor temperature for a conveyor motor – 01 June 2005.

Figure Q.3-6: Load current and motor temperature for a conveyor motor

0 25 50 75 100 125 150 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 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C) 0 25 50 75 100 125 150 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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Q.3.2 SECTION 51

Figure Q.3-7: Load current and motor temperature for a conveyor motor – 28 June 2005. 0 25 50 75 100 125 150 6:30 7:30 8:30 9:30 10:30 11:30 12:30 13:30 14:30 Time (hh:mm) C ur re nt (A ) 0 10 20 30 40 50 60 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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Figure Q.3-8: Load current and motor temperature for a conveyor motor – 28 June 2005. 0 25 50 75 100 125 150 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 Te m pe ra tu re (d eg C ) Current (A) Full load (A) Temp (deg C)

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