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TABLE OF CONTENTS

Appendix K

CM Gathering head motors...1

K.1

Load profile...2

K.1.1

Section 21 ...2

K.1.1.1

Morning shifts ...2

K.1.1.2

Afternoon shifts ...9

K.1.2

Section 51 ...16

K.1.2.1

Morning shifts ...16

K.1.2.2

Afternoon shifts ...21

K.2

Histogram ...26

K.2.1

Section 21 ...27

K.2.1.1

Morning shifts ...27

K.2.1.2

Afternoon shifts ...30

K.2.2

Section 51 ...33

K.2.2.1

Morning shifts ...33

K.2.2.2

Afternoon shifts ...36

K.2.3

Flashcard recorder ...39

K.2.3.1

Morning shifts ...39

K.2.3.2

Afternoon shifts ...41

K.3

Thermal capacity ...43

K.3.1

Section 21 ...43

K.3.1.1

Morning shifts ...43

K.3.1.2

Afternoon shifts ...47

K.3.2

Section 51 ...51

K.3.2.1

Morning shifts ...51

K.3.2.2

Afternoon shifts ...54

(2)

APPENDIX K

CM GATHERING HEAD MOTORS

Typical nameplate data for the gathering head motors of a CM can be seen in

Table K-1. The gathering head motors measured at all the sections was a 40 kW

induction motor with a full load current rating of 33 A.

Table K-1: Nameplate data of the gathering head motor on a CM.

Table K-2: Production figures for shifts that the gathering head motors were

investigated.

Date

Morning

Afternoon

Morning

Afternoon

Morning Afternoon

17-May-2005

858

2145

-

-

-

-18-May-2005

1320

2112

-

-

-

-19-May-2005

1716

2013

-

-

-

-23-May-2005

-

-

1740

2030

-

-24-May-2005

-

-

1450

2320

-

-25-May-2005

-

-

2320

1160

-

-9-Jun-2005

1225

1400

-

-

-

-10-Jun-2005

1575

2695

-

-

-

-13-Jun-2005

2310

2520

-

-

-

-29-Jun-2005

-

-

-

-

1305

2175

30-Jun-2005

-

-

-

-

1740

2320

Sect 21

Sect 61

Sect 51

Power

40

kW

Voltage

1000

V

Duty

S1 - HR

Current

33

A

Ins class

H

RPM

1390

pf

0.76

(3)

K.1 LOAD PROFILE

The next section focuses on the load profiles of the gathering head motors. Each

graph shows the line voltage and the voltage limits, the load current and full load

current capacity of the gathering head motors. The morning shifts and afternoon shifts

are separated as well as the measurements made at the different sections.

K.1.1 SECTION 21

K.1.1.1 Morning shifts

Figure K.1-1: Load current and voltage for a LH gathering head motor

– 9 June 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 50 100 150 200 250 300

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(4)

Figure K.1-2: Load current and voltage for a LH gathering head motor

– 9 June 2005 (30 minute period).

Figure K.1-3: Load current and voltage for a RH gathering head motor

– 9 June 2005.

0 200 400 600 800 1000 1200 8:00 8:05 8:10 8:15 8:20 8:25 8:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200 250 300

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(5)

Figure K.1-4: Load current and voltage for a RH gathering head motor

– 9 June 2005 (30 minute period).

Figure K.1-5: Load current and voltage for a LH gathering head motor

– 10 June 2005.

0 200 400 600 800 1000 1200 8:00 8:05 8:10 8:15 8:20 8:25 8:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(6)

Figure K.1-6: Load current and voltage for a LH gathering head motor

– 10 June 2005 (30 minute period).

Figure K.1-7: Load current and voltage for a RH gathering head motor

– 10 June 2005.

0 200 400 600 800 1000 1200 10:30 10:35 10:40 10:45 10:50 10:55 11:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(7)

Figure K.1-8: Load current and voltage for a RH gathering head motor

– 10 June 2005 (30 minute period).

Figure K.1-9: Load current and voltage for a LH gathering head motor

– 13 June 2005.

0 200 400 600 800 1000 1200 10:30 10:35 10:40 10:45 10:50 10:55 11:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(8)

Figure K.1-10: Load current and voltage for a LH gathering head motor

– 13 June 2005 (30 minute period).

Figure K.1-11: Load current and voltage for a RH gathering head motor

– 13 June 2005.

0 200 400 600 800 1000 1200 8:30 8:35 8:40 8:45 8:50 8:55 9:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(9)

Figure K.1-12: Load current and voltage for a RH gathering head motor

– 13 June 2005 (30 minute period).

0 200 400 600 800 1000 1200 8:30 8:35 8:40 8:45 8:50 8:55 9:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(10)

K.1.1.2 Afternoon shifts

Figure K.1-13: Load current and voltage for a LH gathering head motor

– 9 June 2005.

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 50 100 150 200 250 300

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(11)

Figure K.1-14: Load current and voltage for a LH gathering head motor

– 9 June 2005 (30 minute period).

Figure K.1-15: Load current and voltage for a RH gathering head motor

– 9 June 2005.

0 200 400 600 800 1000 1200 5:00 5:05 5:10 5:15 5:20 5:25 5:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 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 50 100 150 200 250 300

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(12)

Figure K.1-16: Load current and voltage for a RH gathering head motor

– 9 June 2005 (30 minute period).

Figure K.1-17: Load current and voltage for a LH gathering head motor

– 10 June 2005.

0 200 400 600 800 1000 1200 5:00 5:05 5:10 5:15 5:20 5:25 5:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(13)

Figure K.1-18: Loa Load current and voltage for a LH gathering head motor

– 10 June 2005 (30 minute period).

Figure K.1-19: Load current and voltage for a RH gathering head motor

– 10 June 2005.

0 200 400 600 800 1000 1200 11:30 11:35 11:40 11:45 11:50 11:55 12:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(14)

Figure K.1-20: Load current and voltage for a RH gathering head motor

– 10 June 2005 (30 minute period).

Figure K.1-21: L Load current and voltage for a LH gathering head motor

– 13 June 2005.

0 200 400 600 800 1000 1200 11:30 11:35 11:40 11:45 11:50 11:55 12:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(15)

Figure K.1-22: Lo Load current and voltage for a LH gathering head motor

– 13 June 2005 (30 minute period).

Figure K.1-23: Lo Load current and voltage for a RH gathering head motor

– 13 June 2005.

0 200 400 600 800 1000 1200 5:30 5:35 5:40 5:45 5:50 5:55 6:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(16)

Figure K.1-24: Loa Load current and voltage for a RH gathering head motor

– 13 June 2005 (30 minute period).

0 200 400 600 800 1000 1200 5:30 5:35 5:40 5:45 5:50 5:55 6:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(17)

K.1.2 SECTION 51

K.1.2.1 Morning shifts

Figure K.1-25: Load current and voltage for a LH gathering head motor

– 29 June 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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(18)

Figure K.1-26: L Load current and voltage for a LH gathering head motor

– 29 June 2005 (30 minute period).

Figure K.1-27: Load current and voltage for a RH gathering head motor

– 29 June 2005.

0 200 400 600 800 1000 1200 1:30 1:35 1:40 1:45 1:50 1:55 2:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(19)

Figure K.1-28: Load current and voltage for a RH gathering head motor

– 29 June 2005 (30 minute period).

Figure K.1-29: Load current and voltage for a LH gathering head motor

– 30 June 2005.

0 200 400 600 800 1000 1200 1:30 1:35 1:40 1:45 1:50 1:55 2:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(20)

Figure K.1-30: Load current and voltage for a LH gathering head motor

– 30 June 2005 (30 minute period).

Figure K.1-31: Load current and voltage for a RH gathering head motor

– 30 June 2005.

0 200 400 600 800 1000 1200 10:00 10:05 10:10 10:15 10:20 10:25 10:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(21)

Figure K.1-32: Load current and voltage for a RH gathering head motor

– 30 June 2005 (30 minute period).

0 200 400 600 800 1000 1200 10:00 10:05 10:10 10:15 10:20 10:25 10:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(22)

K.1.2.2 Afternoon shifts

Figure K.1-33: Load current and voltage for a LH gathering head motor

– 29 June 2005.

0 200 400 600 800 1000 1200 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(23)

Figure K.1-34: Load current and voltage for a LH gathering head motor

– 29 June 2005 (30 minute period).

Figure K.1-35: Load current and voltage for a RH gathering head motor

– 29 June 2005.

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 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(24)

Figure K.1-36: Load current and voltage for a RH gathering head motor

– 29 June 2005 (30 minute period).

Figure K.1-37: Load current and voltage for a LH gathering head motor

– 30 June 2005.

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 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(25)

Figure K.1-38: Load current and voltage for a LH gathering head motor

– 30 June 2005 (30 minute period).

Figure K.1-39: Load current and voltage for a RH gathering head motor

– 30 June 2005.

0 200 400 600 800 1000 1200 7:30 7:35 7:40 7:45 7:50 7:55 8:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

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 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(26)

Figure K.1-40: Load current and voltage for a RH gathering head motor

– 30 June 2005 (30 minute period).

0 200 400 600 800 1000 1200 7:30 7:35 7:40 7:45 7:50 7:55 8:00

Time (hh:mm)

Li

ne

V

ol

ta

ge

(V

)

0 50 100 150 200

C

ur

re

nt

(A

)

Voltage (V) Voltage limit (upper) Voltage limit (lower) Current (A) Full load (A)

(27)

K.2 HISTOGRAM

The next section focuses on the frequency with which a CMs gathering head motors

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.

(28)

K.2.1 SECTION 21

K.2.1.1 Morning shifts

Table K-3: Data for the total consumption of a LH gathering head motor in

section 21.

Figure K.2-1: Histogram for power consumed by a LH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05

9-Jun-05 10-Jun-05 13-Jun-05

Tonnes/CM/Shift

1225

1575

2310

% Time of shift producing

18.07%

19.59%

26.20%

% of Production time underloaded

94.85%

93.54%

95.76%

% of Production time overloaded

5.15%

6.46%

4.24%

(29)

Figure K.2-2: Histogram for current consumed by a LH gathering head motor.

Table K-4: Data for the total consumption of a RH gathering head motor in

section 21.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05

9-Jun-05 10-Jun-05 13-Jun-05

Tonnes/CM/Shift

1225

1575

2310

% Time of shift producing

16.98%

19.51%

26.17%

% of Production time underloaded

94.12%

92.97%

95.57%

% of Production time overloaded

5.88%

7.03%

4.43%

(30)

Figure K.2-3: Histogram for power consumed by a RH gathering head motor.

Figure K.2-4: Histogram for current consumed by a RH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05 0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05

(31)

K.2.1.2 Afternoon shifts

Table K-5: Data for the total consumption of a LH gathering head motor in

section 21.

Figure K.2-5: Histogram for power consumed by a LH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05

9-Jun-05 10-Jun-05 13-Jun-05

Tonnes/CM/Shift

1400

2695

2520

% Time of shift producing

21.89%

22.56%

34.92%

% of Production time underloaded

94.21%

93.11%

95.43%

% of Production time overloaded

5.79%

6.89%

4.57%

(32)

Figure K.2-6: Histogram for current consumed by a LH gathering head motor.

Table K-6: D Data for the total consumption of a RH gathering head motor in

section 21.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05

9-Jun-05 10-Jun-05 13-Jun-05

Tonnes/CM/Shift

1400

2695

2520

% Time of shift producing

21.14%

22.55%

34.66%

% of Production time underloaded

93.50%

92.69%

95.15%

% of Production time overloaded

6.50%

7.31%

4.85%

(33)

Figure K.2-7: Histogram for power consumed by a RH gathering head motor.

Figure K.2-8: Histogram for current consumed by a RH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05 0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

9-Jun-05 10-Jun-05 13-Jun-05

(34)

K.2.2 SECTION 51

K.2.2.1 Morning shifts

Table K-7: Data for the total consumption of a LH gathering head motor in

section 51.

Figure K.2-9: Histogram for power consumed by a LH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05

29-Jun-05 30-Jun-05

Tonnes/CM/Shift

1305

1740

% Time of shift producing

14.79%

19.44%

% of Production time underloaded

92.46%

92.38%

% of Production time overloaded

7.54%

7.62%

(35)

Figure K.2-10: Histogram for current consumed by a LH gathering head motor.

Table K-8: Data for the total consumption of a RH gathering head motor in

section 51.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05

29-Jun-05 30-Jun-05

Tonnes/CM/Shift

1305

1740

% Time of shift producing

14.89%

20.68%

% of Production time underloaded

93.01%

93.03%

% of Production time overloaded

6.99%

6.97%

(36)

Figure K.2-11: Histogram for power consumed by a RH gathering head motor.

Figure K.2-12: Histogram for current consumed by a RH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05 0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05

(37)

K.2.2.2 Afternoon shifts

Table K-9: Data for the total consumption of a LH gathering head motor in

section 51.

Figure K.2-13: Histogram for power consumed by a LH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05

29-Jun-05 30-Jun-05

Tonnes/CM/Shift

2175

2320

% Time of shift producing

23.50%

26.59%

% of Production time underloaded

90.60%

92.03%

% of Production time overloaded

9.40%

7.97%

(38)

Figure K.2-14: Histogram for current consumed by a LH gathering head motor.

Table K-10: Data for the total consumption of a RH gathering head motor in

section 51.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05

29-Jun-05 30-Jun-05

Tonnes/CM/Shift

2175

2320

% Time of shift producing

23.74%

29.00%

% of Production time underloaded

91.01%

93.14%

% of Production time overloaded

8.99%

6.86%

(39)

Figure K.2-15: Histogram for power consumed by a RH gathering head motor.

Figure K.2-16: Histogram for current consumed by a RH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05 0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

Power bins (kW)

Fr

eq

ue

nc

y

29-Jun-05 30-Jun-05

(40)

K.2.3 FLASHCARD RECORDER

K.2.3.1 Morning shifts

Table K-11: Data for the total consumption of a LH gathering head motor in

section 21 & 61.

Figure K.2-17: Histogram for current consumed by a LH gathering head motor.

Table K-12: Data for the total consumption of a RH gathering head motor in

section 21 & 61.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

16-May-05 17-May-05 18-May-05 23-May-05

16-May-05 17-May-05 18-May-05 23-May-05

Tonnes/CM/Shift

1551

858

1320

1740

% Time of shift producing

23.45%

9.96%

11.23%

16.24%

% of Production time underloaded

97.38%

96.17%

92.45%

90.98%

% of Production time overloaded

2.62%

3.83%

7.55%

9.02%

16-May-05 17-May-05 18-May-05 23-May-05

Tonnes/CM/Shift

1551

858

1320

1740

% Time of shift producing

23.45%

9.97%

11.23%

16.24%

% of Production time underloaded

97.34%

96.32%

93.04%

91.25%

% of Production time overloaded

26.56%

3.68%

6.96%

8.75%

(41)

Figure K.2-18: Histogram for current consumed by a RH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

16-May-05 17-May-05 18-May-05 23-May-05

(42)

K.2.3.2 Afternoon shifts

Table K-13: Data for the total consumption of a LH gathering head motor in

section 21 & 61.

Figure K.2-19: Histogram for current consumed by a LH gathering head motor.

Table K-14: Data for the total consumption of a RH gathering head motor in

section 21 & 61.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

16-May-05 17-May-05 18-May-05 23-May-05

16-May-05 17-May-05 18-May-05 23-May-05

Tonnes/CM/Shift

1485

2145

2112

2030

% Time of shift producing

18.59%

21.26%

26.46%

19.41%

% of Production time underloaded

94.41%

93.86%

97.67%

88.62%

% of Production time overloaded

5.59%

6.14%

2.33%

11.38%

16-May-05 17-May-05 18-May-05 23-May-05

Tonnes/CM/Shift

1485

2145

2112

2030

% Time of shift producing

18.59%

21.26%

26.46%

19.41%

% of Production time underloaded

94.22%

94.03%

97.57%

89.59%

% of Production time overloaded

5.78%

5.97%

2.43%

10.41%

(43)

Figure K.2-20: Histogram for current consumed by a RH gathering head motor.

0 500 1000 1500 2000 2500 3000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Current bins (A)

Fr

eq

ue

nc

y

16-May-05 17-May-05 18-May-05 23-May-05

(44)

K.3 THERMAL CAPACITY

The next section focuses on the temperature of the windings of the gathering head

motors. 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.

K.3.1 SECTION 21

K.3.1.1 Morning shifts

Figure K.3-1: Load current and motor temperature for a LH gathering head

motor – 9 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(45)

Figure K.3-2: Load current and motor temperature for a RH gathering head

motor – 9 June 2005.

Figure K.3-3: Load current and motor temperature for a LH gathering head

motor – 10 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C) 0 20 40 60 80 100 120 140 160 180 200 6:30 7:30 8:30 9:30 10:30 11:32 12:32 1:32 2:32

Time (hh:mm)

C

ur

re

nt

(A

)

0 10 20 30 40 50 60 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(46)

Figure K.3-4: Load current and motor temperature for a RH gathering head

motor – 10 June 2005

Figure K.3-5: Load current and motor temperature for a LH gathering head

motor – 13 June 2005.

0 20 40 60 80 100 120 140 160 180 200 6:30 7:30 8:30 9:30 10:30 11:32 12:32 1:32 2:32

Time (hh:mm)

C

ur

re

nt

(A

)

0 10 20 30 40 50 60 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C) 0 20 40 60 80 100 120 140 160 180 200 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 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(47)

Figure K.3-6: Load current and motor temperature for a RH gathering head

motor – 13 June 2005

0 20 40 60 80 100 120 140 160 180 200 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 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(48)

K.3.1.2 Afternoon shifts

Figure K.3-7: Load current and motor temperature for a LH gathering head

motor – 9 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(49)

Figure K.3-8: Load current and motor temperature for a RH gathering head

motor – 9 June 2005.

Figure K.3-9: Load current and motor temperature for a LH gathering head

motor – 10 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C) 0 20 40 60 80 100 120 140 160 180 200 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30

Time (hh:mm)

C

ur

re

nt

(A

)

0 10 20 30 40 50 60 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(50)

Figure K.3-10: Load current and motor temperature for a RH gathering head

motor – 10 June 2005.

Figure K.3-11: Load current and motor temperature for a LH gathering head

motor – 13 June 2005.

0 20 40 60 80 100 120 140 160 180 200 3:30 4:30 5:30 6:30 7:30 8:30 9:30 10:30 11:30 12:30 1:30

Time (hh:mm)

C

ur

re

nt

(A

)

0 10 20 30 40 50 60 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C) 0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(51)

Figure K.3-12: Load current and motor temperature for a RH gathering head

motor – 13 June 2005

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(52)

K.3.2 SECTION 51

K.3.2.1 Morning shifts

Figure K.3-13: Load current and motor temperature for a LH gathering head

motor – 29 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(53)

Figure K.3-14: Load current and motor temperature for a RH gathering head

motor 29 June 2005.

Figure K.3-15: Load current and motor temperature for a LH gathering head

motor – 30 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C) 0 20 40 60 80 100 120 140 160 180 200 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 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(54)

Figure K.3-16: Load current and motor temperature for a RH gathering head

motor – 30 June 2005

0 20 40 60 80 100 120 140 160 180 200 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 70 80

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(55)

K.3.2.2 Afternoon shifts

Figure K.3-17: Load current and motor temperature for a LH gathering head

motor – 29 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(56)

Figure K.3-18: Load current and motor temperature for a RH gathering head

motor – 29 June 2005.

Figure K.3-19: Load current and motor temperature for a LH gathering head

motor – 30 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C) 0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

(57)

Figure K.3-20: Load current and motor temperature for a RH gathering head

motor – 30 June 2005.

0 20 40 60 80 100 120 140 160 180 200 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

Te

m

pe

ra

tu

re

(d

eg

C

)

Current (A) Full load (A) Temp (deg C)

Referenties

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