NGR Datasheet

NGR
www.vishay.com
Vishay Milwaukee
Reliable Neutral Grounding Resistors, High Current Grid Resistors
FEATURES
• Tied live design so that there are no floating
voltages in the assembly
• Rugged shock resistant IP23 rated enclosures
available environmental protection
• Lifting eyes allow safe and easy installation
• Stainless steel resistive elements
• High thermal capacity to absorb high currents
• Can be designed for specific applications
• Custom design on demand
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS OF NEUTRAL GROUNDING (NEUTRAL EARTHING)
Vishay Milwaukee resistor offers a complete line of custom and standard neutral grounding resistors (NGRs), also known as
neutral earthing resistors (NERs). Milwaukee resistor neutral grounding resistors are designed to absorb a large amount of
energy without exceeding temperature limitations defined in IEEE-32. These resistors are used for grounding of generators and
transformers in wye configurations for ground fault, overvoltage, and short circuit protection.
CONTACT THE FACTORY FOR CUSTOM DESIGN AND OPTIONS FOR STANDARD DESIGNS
Options include: current transformers, enclosure style and entrance location, enclosure stands, disconnects, bushings, etc.
For custom designs please include: system voltage, line-neutral voltage, max. on-time, current rating
CSA CODE SPECIAL INSPECTION AVAILABLE UPON REQUEST
An independent, not-for-profit, member-based association dedicated to advancing safety, sustainability, and social good, the
CSA Group is an internationally accredited standards development, testing, and certification organization. By offering CSA code
special inspection for its NGR series of neutral ground resistors, Vishay allows its customers to take advantage of one-time
verification programs that help them get products to the market quickly and safely when certification is not practical.
STANDARD ELECTRICAL SPECIFICATIONS
SYSTEM VOLTAGE
(kV)
LINE-NEUTRAL
VOLTAGE
(kV)
CURRENT
(A)
RESISTANCE
VALUE
Ω
TOLERANCE
±%
NGR1390
2.4
1.39
100 to 1000
1.39 to 13.9
10
NGR2400
4.16
2.4
100 to 1000
2.40 to 24.00
10
NGR4160
7.20
4.16
100 to 1000
4.16 to 41.60
10
NGR7200
12.47
7.2
100 to 1000
7.2 to 72
10
NGR7620
13.2
7.62
100 to 1000
7.6 to 76
10
NGR8000
13.8
8
100 to 1000
8 to 80
10
MODEL
Note
• Per IEEE-32, standard NGRs are designed for a maximum on-time of 10 s and a maximum temperature rise of 760 °C.
CONTACT INFORMATION
For design assistance, contact: [email protected] or +1-888-616-6666
Revision: 14-Oct-15
Document Number: 31873
1
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
NGR
www.vishay.com
Vishay Milwaukee
DETAILED PRODUCT RATINGS - AVAILABLE VOLTAGE AND CURRENT VALUES
GLOBAL MODEL
HISTORICAL
MODEL
NGR1390K0100B00000
NGR1390K0200B00000
NGR1390K0300B00000
NGR1390K0400B00000
NGR1390K0500B00000
NGR1390K0600B00000
NGR1390K0800B00000
NGR1390K1000B00000
MRC13100
MRC13200
MRC13300
MRC13400
MRC13500
MRC13600
MRC13800
MRC131000
NGR2400K0100B00000
NGR2400K0200B00000
NGR2400K0300B00000
NGR2400K0400B00000
NGR2400K0500B00000
NGR2400K0600B00000
NGR2400K0800B00000
NGR2400K1000B00000
MRC24100
MRC24200
MRC24300
MRC24400
MRC24500
MRC24600
MRC24800
MRC241000
NGR4160K0100B00000
NGR4160K0200B00000
NGR4160K0300B00000
NGR4160K0400B00000
NGR4160K0500B00000
NGR4160K0600B00000
NGR4160K0800B00000
NGR4160K1000B00000
MRC41100
MRC41200
MRC41300
MRC41400
MRC41500
MRC41600
MRC41800
MRC411000
NGR7200K0100B00000
NGR7200K0200B00000
NGR7200K0300B00000
NGR7200K0400B00000
NGR7200K0500B00000
NGR7200K0600B00000
NGR7200K0800B00000
NGR7200K1000B00000
MRC72100
MRC72200
MRC72300
MRC72400
MRC72500
MRC72600
MRC72800
MRC721000
NGR7620K0100B00000
NGR7620K0200B00000
NGR7620K0300B00000
NGR7620K0400B00000
NGR7620K0500B00000
NGR7620K0600B00000
NGR7620K0800B00000
NGR7620K1000B00000
MRC76100
MRC76200
MRC76300
MRC76400
MRC76500
MRC76600
MRC76800
MRC761000
NGR8000K0100B00000
NGR8000K0200B00000
NGR8000K0300B00000
NGR8000K0400B00000
NGR8000K0500B00000
NGR8000K0600B00000
NGR8000K0800B00000
NGR8000K1000B00000
MRC80100
MRC80200
MRC80300
MRC80400
MRC80500
MRC80600
MRC80800
MRC801000
Revision: 14-Oct-15
SYSTEM
LINE-NEUTRAL
CURRENT
VOLTAGE
VOLTAGE
(A)
(kV)
(kV)
5 kV VOLTAGE CLASS
2.4
1.39
100
2.4
1.39
200
2.4
1.39
300
2.4
1.39
400
2.4
1.39
500
2.4
1.39
600
2.4
1.39
800
2.4
1.39
1000
5 kV VOLTAGE CLASS
4.16
2.4
100
4.16
2.4
200
4.16
2.4
300
4.16
2.4
400
4.16
2.4
500
4.16
2.4
600
4.16
2.4
800
4.16
2.4
1000
5 kV VOLTAGE CLASS
7.20
4.16
100
7.20
4.16
200
7.20
4.16
300
7.20
4.16
400
7.20
4.16
500
7.20
4.16
600
7.20
4.16
800
7.20
4.16
1000
15 kV VOLTAGE CLASS
12.47
7.2
100
12.47
7.2
200
12.47
7.2
300
12.47
7.2
400
12.47
7.2
500
12.47
7.2
600
12.47
7.2
800
12.47
7.2
1000
15 kV VOLTAGE CLASS
13.2
7.62
100
13.2
7.62
200
13.2
7.62
300
13.2
7.62
400
13.2
7.62
500
13.2
7.62
600
13.2
7.62
800
13.2
7.62
1000
15 kV VOLTAGE CLASS
13.8
8
100
13.8
8
200
13.8
8
300
13.8
8
400
13.8
8
500
13.8
8
600
13.8
8
800
13.8
8
1000
RESISTANCE
(Ω)
DIMENSIONS (inches)
A
B
C
13.9
6.95
4.63
3.48
2.78
2.32
1.74
1.39
36
36
36
36
36
36
36
36
36
36
36
36
36
36
36
36
34
34
34
34
34
34
48
48
24.00
12.00
8.00
6.00
4.80
4.00
3.00
2.40
36
36
36
36
36
36
36
36
36
36
36
36
36
36
36
36
34
34
34
34
34
48
48
48
41.60
20.80
13.87
10.40
8.32
6.93
5.20
4.16
36
36
36
36
36
36
36
36
36
36
36
36
36
36
36
36
34
34
34
48
48
48
63
63
72
36
24
18
14.4
12
9
7.2
42
42
42
42
42
84
84
84
48
48
48
48
48
48
48
48
48
48
48
63
63
48
63
63
76
38.1
25.4
19
15.2
12.7
9.5
7.6
42
42
42
42
84
84
84
84
48
48
48
48
48
48
48
48
48
48
48
63
48
48
63
63
80
40
26.7
20
16
13.6
10
8
42
42
42
42
42
42
42
-
48
48
48
48
48
48
48
-
48
48
48
63
48
48
63
-
Document Number: 31873
2
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
NGR
www.vishay.com
Vishay Milwaukee
DIMENSIONS
C
A
B
Front view
Right side view
Note
• See “Standard Product Ratings” table for product specific dimensions
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
RESISTOR CHARACTERISTICS
Resistance tolerance
%
10
Operating temperature
°C
-55 to +760
Maximum working voltage
kV
0.6 to 15 (product dependent)
MATERIAL SPECIFICATIONS
Resistive element
Stainless steel
Element insulators
Ceramic
Enclosure
Steel (stainless steel upon request)
High voltage insulation
Porcelain
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: NGR8000K1000BZZZZZ (NGR-ZZZZZ 8000 V 1000 A 10 % B)
N
G
R
8
0
0
0
K
1
0
0
0
B
Z
Z
Z
Z
Z
MODEL
(3 digits)
VALUE
(4 digits)
TOLERANCE
(1 digit)
SIZE
(4 digit)
PACKAGING
(1 digit)
SPECIAL
(5 digits)
NGR
1390 = 1390 V line-neutral
2400 = 2400 V line-neutral
4160 = 4160 V line-neutral
7200 = 7200 V line-neutral
7620 = 7620 V line-neutral
8000 = 8000 V line-neutral
K = ± 10 %
0400 = 400 A
1000 = 1000 A
B = bulk
D = wood crated
R = international, heavy
duty and plastic skids
Allowable range 00000 to
ZZZZZ
alphanumeric
Revision: 14-Oct-15
K = standard for all
types and values
B = standard for all types
and values
Engineering controlled
internal document number
Document Number: 31873
3
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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Vishay
Disclaimer
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Revision: 02-Oct-12
1
Document Number: 91000