C:\1ZKENG1\SIN-GEN\Trofazni sinhroni generatori konstantnog

Transkript

BRUSHLESS
SYNCHRONOUS
CONSTANT VOLTAGE
GENERATORS
2
BRUSHLESS SYNCHRONOUS CONSTANT VOLTAGE GENERATORS
APPLICATION
Brushless synchronous constant voltage generators shown in this
catalogue are designed for generating electrical energy on all
locations and environmental conditions where the distribution
network is not available or when an interruption of power supply
occurs. The main applications are as generators driven by diesel
engines, hydro turbines, wind turbines etc. The generators comply
with IEC 60034-1. In addition, on special request, they can be
designed in accordance with the recommendations of other
classification societies.
OPERATION PRINCIPLE
Assembly of the generator unit is consisting of the main generator,
the exciter and of the elements for voltage regulation. The exciter is
used for a main generator excitation supply. The output voltage of
the exciter (4) is regulated by two separate excitation windings. One
of these windings (5) is supplied from the compound transformer (8)
and the additional resistor (9), while the other winding (6) is supplied
from the voltage regulator (11). Compound transformer ensures
compensation of the voltage dip while the additional resistor
ensures safe and reliable self-excitation. Direct regulation of the
main generator output voltage is ensured by its own excitation
winding (2) and rotating rectifier (3) of the exciter. The voltage
regulator (11) ensures regulation of output voltage of the exciter to
kip output voltage of the generator constant and irrespective of the
load.
SPEED AND DIRECTION OF ROTATION
The generators are designed to withstand rotation speed 1.2 times
the rated one. For higher speed, please consult the manufacturer.
The generators are capable to operate in both directions.
COUPLING
The generators can be connected to a driving machine (diesel
engine, turbine, electric motor etc.) either by the elastic or rigid
coupling.
THERMAL PROTECTION
On special request, stator windings of the generator can be
protected from overheating by PTC thermistors in accordance with
the IEC 60034-11.
MECHANICAL DESIGN
The stator housing of the generator is a welded steel design. The
rotor of the exciter and the rotating rectifier are mounted on the shaft
of the main machine. The stator of the exciter is embedded inside
the end shield of the main generator (opposite of the driving side).
The voltage regulator, resistors for setting and transformers are
embedded outside of the end shield meaning that access is very
easy. They are protected by the special cover. With the generators
type DRE 301-4 and DRE 302-4 voltage regulator and resistors for
setting are embedded in a terminal box of the generators. This type
no need compound transformer. Aluminum made fan is located on a
drive side. The rotors are balanced dynamically according to the
DIN ISO 2373 and IEC 60034-14. The generators are designed for
three basic mounting arrangements: IM B3/B14, IM B14/B20 and
IM B5/B20, in accordance with the IEC 60034-7.
MECHANICAL PROTECTION AND COOLING
The generators are built with IP 23 mechanical protection degree,
according to IEC 60034-5. Cooling is performed by a fan, which
sucks cooling air from the non-drive side, and after cooling inside
parts of the machine, throws out hot air on the drive side.
1. Stator of the main generator
2. Excitation winding of the main
generator
3. Rotating rectifier
4. Rotor of the exciter
5. Compound field of the exciter
6. Regulating field of the exciter
7. Rectifier
8. Compound transformer
9. Resistor
10. Static transformer (for parallel
operation)
11. Voltage regulator
12. Voltage setting
13. Setting of static
BEARINGS
Design of the end shields and selected bearings provide quiet and
long-term generator operation. The bearings are shown in the
table 1, page 5.
RADIO INTERFERENCE PROTECTION
Protection degree against radio interference of the generators is N,
according to the IEC CISPR-14-1.
Generators with higher protection degree available on special
request.
VOLTAGE AND FREQUENCY
The generators are designed for following voltages and frequencies,
according to IEC 60038:
380 ÷ 415 V / 50 Hz
440 ÷ 480 V / 60 Hz
WINDING INSULATION
The generator windings are designed with insulation class F and
impregnated by VPI method. This insulation system is suitable for
temperature rise limit of 105 K above ambient temperature of 40 ° C,
but generators of this catalogue meet temperature rise limit, which
correspond, to insulation class B.
VOLTAGE STABILITY
Maximum voltage deviation in a static operating mode, up to rated
power and power factor from cosϕ = 0.8 (inductive) up the
cosϕ = 1, is ± 1.5 % of the set point.
Dynamic voltage changing caused by a sudden change in load, in
respect of the generator type, is between 11 % and 17 % of the set
point.
The values correspond to unchanged speed and power factor
cosϕ = 0.8 (inductive), in first period. The set voltage value is
reaching after 5 to 10 periods (from 0.1 to 0.2 seconds).
NOISE AND VIBRATION
The generators satisfy the noise level emission in accordance with
the IEC 60034-9. Vibration severity grade is N in accordance with
the IEC 60034-14. Lower noise and vibration levels are available on
special request.
VOLTAGE DISTORTION
Distortion factor of the output voltage of the generator from no load
up to rated power and power factor cosϕ=0.8 is ≤ 5 %, measured
on a phase voltage.
OVERLOAD CAPACITY
The generators heated to an operating temperature are capable to
withstand current equal to 1.1 times the rated current for one hour.
The same way, they can be overloaded by the current 1.5 times the
rated one for not longer than 2 minutes.
SHORT CIRCUIT CURRENT
The generators are capable to withstand (without damaging) short
circuit currents which are 3 to 4 times higher than the rated one, not
longer than 3 seconds.
OUTPUT
According to the IEC 60034-1, the rated output power of the
generators refers to continuous running duty (S1) at rated voltage,
rated frequency and power factor cosϕ=0.8 (inductive) to cosϕ=1.
Generators for the special operating conditions, temperature above
40 ° and altitude above 1000 m ASL, are available on request.
STANDARDS
The generators are designed in accordance with the following
standards:
’
’
’
’
’
’
’
’
’
’
’
’
IEC 60034-1
Rating and performance
IEC 60034-2
Methods for determining losses and efficiency
IEC 60034-5
Degree of mechanical protection
IEC 60034-6
Methods of cooling
IEC 60034-7
Mounting arrangements
IEC 60034-8
Terminal markings
IEC 60034-9
Noise limits
IEC 60034-11
Built in thermal protection
IEC 60034-14
Mechanical vibrations, limit values
IEC 60038
IEC standard voltage
IEC 60085
Insulation material classification
IEC CISPR-14-1 Protection against radio interference
NOTES
On special request, we can deliver generators for marine use (in
accordance with various classification societies), generators for
parallel operation and generators with other specific requirements of
the customers.
3
TECHNICAL DATA
GL
45 °C LRS 45 °C Moment
Mass
400 V, cosϕ=0.8 LRS 40 °C DNV 50 °C
of
Rotor
Total
BV
45 °C BV
50 °C inertia
PP
SN
PP
SN
PP
J
m
IN
SN
2
kVA
A
kW
kVA
kW
kVA
kW
kgm
kg
kg
TYPE
η - Efficiency for SN
cosϕ=0.8
1
1
/4
3
/2
/4
cosϕ=1.0
1
/1
5
/4
1
/4
1
3
/2
/4
1
/1
5
/4
-1
n=1500 min . 50 Hz
DRE 301 - 4
10
14.4
9.5
9.6
9.1
9
8.6
0.22
44
110
74
76
76.4
76.6
75
76
77
78
78
77
DRE 302 - 4
15
21.6
14.6
14.3
13.8
14
13.5
0.24
46
140
79.8
83.6
83.3
82.1
80.5
83.2
86.8
86.1
86
84.8
DRE 304 - 4
25
36.1
23.8
24
22.8
22.5
21.5
0.375
66
240
81.6
85.5
85.2
84.0
82.3
85.1
88.8
88.8
87.9
86.7
DRE 305 - 4
30
43.3
28.2
28.5
26.7
27
25.4
0.425
74
260
82.3
86.3
86.3
85.2
83.7
85.6
89.4
89.6
88.8
87.7
DRE 307 - 4
37
53.4
34.0
35
32.1
33
30.3
0.5
87
290
83.4
87.6
87.8
87.1
85.9
86.4
90.3
90.7
90.2
89.3
DRE 308 - 4
45
65.0
41.0
43
39.5
40.5
37.0
0.625
105
325
83.2
87.7
88.2
87.6
86.7
86.3
90.4
91.0
90.7
89.9
DRE 365 - 4
55
79.4
49.7
52
47.0
49
44.0
0.825
107
375
84.9
88.9
89.2
88.6
87.6
87.7
91.3
91.8
91.4
90.7
DRE 366 - 4
65
93.8
58.0
62
55.5
58
51.8
0.95
123
400
85.5
89.5
90.0
89.6
88.8
88.1
91.8
92.4
92.2
91.6
DRE 367 - 4
75
108.2
67.0
71
63.2
67
60.0
1.1
140
435
86.0
90.0
90.4
90.0
89.2
88.5
92.1
92.7
92.5
91.9
DRE 368 - 4
85
122.7
75.0
81
71.7
76
67.0
1.25
160
465
86.0
90.2
90.8
90.6
89.9
88.6
92.3
93.0
92.9
92.5
DRE 443 - 4
100
144
89.0
95
84.5
90
80.1
2.25
175
530
85.9
89.4
90.5
90.1
89.3
88.5
92.1
92.7
92.5
91.9
DRE 445 - 4
125
180
110.3 119
105.0 112
98.5
2.8
222
620
86.9
90.7
91.3
91.0
90.2
89.3
92.7
93.3
93.1
92.6
DRE 447 - 4
150
217
130.8 142
124.3 135
117.6
3.125
259
734
87.4
91.2
91.9
91.6
91.0
89.6
93.1
93.7
93.6
93.2
DRE 448 - 4
170
245
147.0 161
139.0 153
132.3
3.725
301
850
87.7
91.7
92.5
92.4
92.0
89.9
93.4
94.2
94.2
93.9
DRE 449 - 4
185
267
159.5 176
151.5 167
144.0
4.075
326
900
87.9
91.9
92.7
92.6
92.2
90.0
93.5
94.3
94.3
94.0
DRE 543 - 4
220
318
190.4 209
183.8 198
172.8
5
388
1060
86.3
90.7
91.5
91.4
90.9
88.9
92.8
93.6
93.7
93.4
DRE 544 - 4
250
361
223.5 238
208.0 225
194.8
5.5
370
1140
87.1
91.3
92.2
92.1
91.7
89.5
93.3
94.1
94.2
93.9
DRE 545 - 4
300
433
267.6 285
253.7 270
240.4
6.5
412
1260
87.5
91.6
92.4
92.4
92.0
89.9
93.5
94.3
94.3
94.1
DRE 547 - 4
350
505
309.5 333
294.1 315
279.4
8.25
512
1470
88.0
92.0
92.9
92.9
92.6
90.1
93.7
94.5
94.6
94.4
DRE 548 - 4
400
577
345.5 390
330.8 360
311.0
9.5
564
1610
88.6
92.5
93.4
93.4
93.1
90.7
94.1
94.9
95.0
94.8
DRE 550 - 4
500
722
425
414
406
700
2000
87.2
93.2
94.1
94.1
93.6
91.3
94.6
95.4
95.6
95.3
1
5
490
470
14
GL
45 °C LRS 45 °C Moment
Mass
450 V, cosϕ=0.8 LRS 40 °C DNV 50 °C
of
Rotor
Total
BV
45 °C BV
50 °C inertia
IN
PP
SN
PP
SN
PP
J
SN
m
2
kVA
A
kW
kVA
kW
kVA
kW
kgm
kg
kg
TYPE
η - Efficiency for SN
cosϕ=0.8
1
1
/4
/2
3
/4
cosϕ=1.0
1
/1
5
/4
1
/4
1
/2
3
/4
/1
/4
-1
n=1800 min . 60 Hz
DRE 301 - 4
12.5
16.0
12.0
12.0
11.5
11.4
11.0
0.22
44
110
73.9
76
76.3
76.8
76.2
75.8
76.7
77.9
78.3
77.4
DRE 302 - 4
19
24.4
18.0
18.0
17.5
17.4
17.0
0.24
46
140
76.6
82.9
83.2
82.4
81.1
82.6
86.9
87.4
86.8
85.8
DRE 304 - 4
31
39.8
29.2
29.5
37.8
28
26.5
0.375
66
240
80.0
85.5
85.8
84.9
83.6
84.3
88.7
89.2
88.6
87.6
DRE 305 - 4
37
47.5
34.4
35.0
32.6
33.5
31.3
0.425
74
260
81.5
86.8
86.8
86.0
84.9
84.8
89.3
89.9
89.4
88.6
DRE 307 - 4
46
59.0
42.0
43.5
40.0
41.5
37.8
0.5
87
290
82.6
87.5
88.2
87.7
86.8
85.7
90.1
90.9
90.6
89.9
DRE 308 - 4
56
71.9
50.8
53.0
48.2
50.5
46.0
0.625
105
325
82.5
87.7
88.5
88.2
87.4
85.6
90.3
91.2
91.0
90.5
DRE 365 - 4
68
87.2
61.0
64.5
58.0
61
54.7
0.825
107
375
84.0
88.7
89.4
89.1
88.3
86.9
91.1
91.9
91.7
91.2
DRE 366 - 4
81
104
72.0
77
68.4
72.5
64.7
0.95
123
400
84.7
89.4
90.2
90.0
89.4
87.4
91.6
92.5
92.4
92.0
DRE 367 - 4
93
119
82.3
88.6
78.0
83.5
74.3
1.1
140
435
85.2
89.8
90.6
90.4
89.8
87.8
91.9
92.8
92.7
92.3
DRE 368 - 4
105
135
92.6 100
88.2
94
83.0
1.25
160
465
85.3
90.0
91.0
90.9
90.4
87.9
92.1
93.0
93.1
92.8
DRE 443 - 4
123
160
111
119
108.8 112
99.3
2.25
175
530
84.9
89.6
90.5
90.4
89.8
87.6
91.8
92.7
92.6
92.2
DRE 445 - 4
155
199
136.0 147
128.7 139
122.0
2.8
222
620
86.0
90.5
91.3
91.2
90.7
88.5
92.4
93.3
93.3
92.9
DRE 447 - 4
185
237
161.0 176
153.0 166
144.8
3.125
259
734
86.0
91.0
91.9
91.9
91.4
88.9
92.8
93.7
93.7
93.5
DRE 448 - 4
210
269
181.8 200
175.0 189
163.2
3.725
301
830
87.0
91.5
92.5
92.6
92.3
89.2
93.2
94.1
94.3
94.1
DRE 449 - 4
230
298
198.5 218
188.2 207
178.7
4.075
326
900
87.2
91.6
92.7
92.8
92.5
89.4
93.3
94.3
94.4
94.2
DRE 543 - 4
275
353
237.5 261
225.7 248
214.7
5
338
1060
84.8
90.0
91.3
91.5
91.2
87.6
92.2
93.4
93.6
93.5
DRE 544 - 4
310
398
269.1 298
256.6 277
242.6
5.5
370
1140
86.9
90.8
92.0
92.2
91.9
88.5
92.8
93.9
94.1
94.0
DRE 545 - 4
375
480
326.5 386
313.3 338
292.6
6.5
412
1260
86.5
91.2
92.3
92.4
92.2
88.9
93.1
94.1
94.3
94.1
DRE 547 - 4
435
628
375.0 414
356.6 390
336.7
8.25
512
1470
87.0
91.6
92.7
92.9
92.7
89.3
93.3
94.4
94.6
94.5
DRE 548 - 4
490
705
425.0 468
404.4 442
382.3
9.5
564
1610
87.8
92.2
93.2
93.4
93.2
90.0
93.8
94.8
95.0
94.9
DRE 550 - 4
620
795
511.0 592
508.7 558
476.9 14
700
2000
88.7
93.0
93.9
94.1
93.8
90.8
94.4
95.3
95.6
95.4
SN - Rated output, IN - Rated current, PP - Driving power, m - Mass for IM B14/B20, GL - Germanischer Lloyd, LRS - Lloyd's Register of Shipping, BV - Bureau Veritas,
DNV - Det Norske Veritas
4
IM B14/B20
DRE
304
305
307
308
365
366
367
368
443
445
447
448
449
543
544
545
547
548
550
-
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
a
a1
b
b1
c
c1
e
f
g
g1
g2
h
290
500
600
430
20
15
359
676
530
585
370 123
i
i1
257
350
500
600
430
20
620
750
550
20
315
530
250
410
680
20
18
360
660
330
860
490
870
635
500 123
645
750
930
970
n
p
65
70
380
q
r
e1
g3
w2
s
d
l
u
t
s1
235
460
410
200 19
55
82
16
59
M12
255
460
430
230 19
55
110
16
59
M12
230
65
120
18 69.2
266 19
75
140
20 79.6 M12
402
437
962
130
360
725
m
860
102
292
300
k
465
80
70
445
1052
510
340 142 985
375
1055
620 123 360 162 1165 100
415
1275
395 142 1255
485
80
525
465
500
565
620
600
325
580
580
120
460
696
600
60
/
600
900
/
940
711 178 439 158 1233 150 100 636
794
/
650
/
405 24
85
90
22
90
M16
710
955
914.4
696 914.4 600
60
/
850 1015
1095 1015
/
940
142 1483
711 178 445 147 1748 150 100 636
916
/
650
/
600 24
90
90
110 25
125 25
95
95
M16
800
IM B5/B20
DRE
304
305
307
308
365
366
367
368
443
445
447
448
449
543
544
545
547
548
550
-
a
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
a1
b
b1
c c1
e
f
g
g1
g2
h
676
530
585
370 123
i
i1
257
290 555 600 447.7 20 53 359
350
680
360
250
315
530
330
410 711 750 647.7 20 20 490
460 711 800 647.7 60 20 600
635
660
725
645
750
930
970
n
p
65
70
380
q
e1
g3
w2
s
d
l
u
t
s1
α°
α1°
235 530
410
200 19
55
82
16
59
11.5
30
15
255 466.7 430
230 19
55
110 16
59
11.5
30
15
65
120 18 69.2
75
140 20 79.6 11.5
30
15
r
402
437
962
63
360
860
870
500 123
m
860
/
292
300 500 600 447.7 20 20
k
465
80
70
445
1052
340
985
375
1055
620 123 360 43 1165 100
415
1275
395
1255
510
485
80
525
465
520
565 325 679.4 580
620
600
230
266 19
120
900
/
940
711 178 439 33 1233 150 100 636
794
/
679.4
/
405 24
85
90
22
90
14
22.5 11.5
710
914.4
850 1015
955 711 914.4 647.7 60 20 1095 1015
/
940
17 1485
711 178 445 17 1748 150 100 636
916
/
679.4
/
600 24
90
90
110 25
115 25
95
95
14
22.5 11.5
All technical data and dimensions during the future development of the generators may undergo changes and therefore they can be considered as obligatory after
our confirmation only. Al dimensions are given in millimetres.
5
IM B3/B14
q
w2
i1
l
p
g1
φ55 m6
a1
b1 h6
u
45°
e1
4,5
h
c
t
g
s
i
n
b
a
f
e
k
DRE
a
301 - 4
302 - 4
190
a1
b
350 279
b1
346
c
e
18
e1
246
314
f
g
342
g1
209
355
h
i
i1
180 255 101
k
n
p
q
s
w2
l
t
u
595
640
70
485
352
15
305
82
59
16
Table 1 - BEARINGS
Generator type
Drive end
Bearing type
Non-drive end
DRE 301 - 4
6312
2Z C3
6208
2Z C3
DRE 302 - 4
6312
2Z C3
6208
2Z C3
DRE 30_ - 4
6212
Z C3
6210
2Z C3
DRE 36_ - 4
6312
C3
6310
C3
DRE 44_ - 4
6316
C3
6312
C3
DRE 54_ - 4
6320
C3
6316
C3
DRE 55_ - 4
6320
C3
6316
C3
Grease
Regreasing period
h
Grease quantity
cm3
For life lubricated
Lithium based grease
9
8000
19/19
7000/8000
31/19
5000/7000
47/31
7000/5000
Table 2 - TERMINAL BOX
Generator type
Number of
terminals
Terminal
stud thread
Maximum
Number of entries
permissible current and dimensions
A
Number of
cable heads
Max. cable
diameter
mm
1 x Pg 13.5
13
1 x Pg 21
21
DRE 305 - 4
2 x Pg 13.5
13
DRE 307 - 4
1 x Pg 29
DRE 301 - 4
M6
DRE 302 - 4
Terminal
box position
Top
60
DRE 304 - 4
DRE 308 - 4
DRE 365 - 4
M10
200
DRE 366 - 4
DRE 367 - 4
29
/
1 x Pg 16
16
1 x Pg 35
36
4
DRE 368 - 4
DRE 443 - 4
Right hand
side, left hand
side on
a request
DRE 445 - 4
DRE 447 - 4
M12
DRE 448 - 4
315
1 x 60
DRE 449 - 4
DRE 543 - 4
1
400
DRE 544 - 4
DRE 545 - 4
DRE 547 - 4
DRE 548 - 4
DRE 550 - 4
/
M16
4x2
2 x 60
2 x 400
2
4 x 60
6
GENERATOR TYPE DRE 301 AND 302 - SECTION VIEW
DRE 301 i 302
IM B3/B14
GENERATOR TYPE DRE 304 TO 550 - SECTION VIEW
DRE 304 - 550
IM B14/B20
Û
Elektri~ne ma{ine a.d.
24 000 Subotica. Magnetna polja 6
Yugoslavia
Tel.: 024/ 548-111. 548-222 . 548-333
Fax: 024/ 547 828. 546 020
E-mail: [email protected]
Enquiry No:
QUESTIONNAIRE FOR BRUSHLESS
SYNCHRONOUS CONSTANT VOLTAGE GENERATOR
CUSTOMER:
Company:
E-mail:
Address:
Telephone:
Person:
Fax:
Department:
Date:
A GENERATOR DATA
B AMBIENT CONDITIONS
1
Brushless synchronous constant voltage generators
1
Temperature:
°C
2
Power:
PN =
kW
2
Relative humidity:
%
3
Voltage:
UN =
V
3
Altitude:
m
4
Frequency:
fN =
Hz
4
Specific conditions:
-1
5
Speed:
nN =
min
6
Voltage stability:
%
7
Voltage distortion:
%
8
Parallel operation:
9
Radio interference protection:
yes
C GENERATOR CLASSIFICATIONS
no
1
Yugoslav societies:
2
Foreign societies: GL
JR
;
PTT
; BV
;
LRS
;
DNV
D LOAD DATA
10 Thermal protection:
yes
no
1
Total load:
11 TH protection:
yes
no
2
Total power factor:
3
Power of the biggest consumer:
kW
%
12 Mounting arrangements:
IM
13 Terminal box positions*:
14 Bearings:
kW
cosϕ=
left
right
4
Coincidence factor:
single
double
5
Way of starting of the biggest consumer:
Notes:
Notice: * From the drive end side
JR - Jugoregistar
GL - Germanischer Lloyd.
PTT - Post and telephone
BV - Bureau Veritas.
LRS - Lloyd's Register of Shipping.
For proper selection of generators please, answer the questions of this questionnaire as fully as possible.
DNV - Det Norske Veritas
CORPORATION
holding International a.d. Subotica
24000 Subotica, FR Yugoslavia, Magnetna polja 6, Telex: 15-116, Tel.: 024/ 548-111, 548-222, Fax: 024/547-828, 546-122
e-mail: [email protected], home page: www.sever.co.yu
FOREIGN COMPANIES
REPRESENTATIVES
SEVER, A/S
Vesterbrogade 6D
1620 Copenhagen V, Denmark
Tel.: + 45 33 124212
Fax: + 45 33 124217
Ganz Sever Kft.
Kobanyai ut 21
1087 Budapest, Hungary
Tel.: + 36 1 2101150
Fax: + 36 1 2102587
MAREX TRADE, s.r.o.
Nam, prezindenta Masaryka 3
Kunratice, 14800 Praha 4, Czech
Tel.: + 42 02 44912156
Fax: + 42 02 44912157
El Zafon, Ltd
22 Alexander Zaid Street
Neve OZ, 49214 Petah Tikva, Israel
Tel.: + 972 3 9245294
Fax: + 972 3 9245293
SEVER Italia Srl.
Via Monte Bianco 9
20051 Limbiate, MI, Italy
Tel.: + 39 02 9961983
Fax: + 39 02 9961987
NBM d.o.o.
Dolnja Lokvica 16
8330 Metlika, Slovenija
Tel.: + 386 68 58 280
Fax: + 386 68 58 004
SEVERTRGOVINA d.o.o.e.l.
Vasil Djorgov 33
91000 Skopje, Macedonia
Tel.: + 389 91 112494
Fax: + 389 91 112394
Sever USA, Inc.
4529 Helgesen Drive
Madison, WI 53718, USA
Tel.: + 1 608 2260085
Fax: + 1 608 2260085
e-mail: severusainc@earth
S. Beljuli - SEVER Vertretung
Worringer str. 30
50259 Pulheim, Deutschland
Tel.: + 49 223896526 - 0
Fax: + 49 223896526 - 20
ZAO SEVER Moskva
Partijnij pereulok, dom. 1
Moskva, Russia
Tel.: + 70953 160325
Fax: + 70953 160325
SEVER LJUBIJA PRIJEDOR, d.o.o.
79101 Prijedor, A.J. Raškoviæa 1
Republika Srpska
Tel.: + 381 79 234818
Fax: + 381 79 233407
RTB COPPER SA (PTY) LTD.
Po Box 11440 Maroelana 0161,PTA,
Landmarks Avenue Unit 13
N1 Industrial Park Samrand, RSA
Tel.: + 27 12 657 0147
Fax: + 27 12 657 0139
P.S.G.351.2000.2E

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