High Voltage
Non-inductive Resistors
WHVL Series
High Voltage Non-inductive Resistors
Welwyn Components
·
Voltage ratings 11 to 67kV
·
W
Non-inductive printed serpentine design
HV L Series
·
Tolerance down to 0.1%
·
TCR down to 15ppm
67kV
Voltage ratings 11 to
Non-inductive printed serpentine design
·
VCR down to -0.04ppm/V
Tolerance down to 0.1%
·
Non-magnetic materials
TCR down to 15ppm
·
RoHS compliant
VCR down to -0.04ppm/V
Non-magnetic materials
RoHS compliant
Electrical Data
P ower rating at 25C
P ower rating at 70C
Limiting element voltage in air
Limiting element voltage in oil*
R esistance range
R esistance tolerance
T CR (25° C to 75° C)
S tandard values
Ambient temperature range
Insulation resistance at 500V
Dielectric strength of insulation
* P rotection code P
watts
watts
kV
kV
ohms
%
ppm/C
C
ohms
V
WHVL2
3.8
2.9
11
22
WHVL3
5
3 .8
14
28
WHVL7
WHVL10
WHVL12
10
13 .5
16
7 .5
10
12
33
45
54
66
90
108
1K 0 – 100G
≤10G: 0.1%, 0.25%, 0.5%, 1%, 2%, 5%
>10G: 0.25%, 0.5%, 1%, 2%, 5%
≤10G: 15, 25, 50, 100
>10G: 25, 50, 100
E 24 preferred
-55 to +225
>10G
>1000
WHVL5
7 .5
5 .6
22
44
WHVL15
20
15
67
134
P hysical Data
Dimensions in mm, weight in g
T ype
L
(±0.5)
L
1
(Max)
WHVL2
27
33 .5
WHVL3
37
43 .5
WHVL5
52
58 .5
WHVL7
77
83 .5
WHVL10
102
108 .5
WHVL12
122
128 .5
WHVL15
152
158 .5
D
(±0.5)
8.0
37
8 .3
8.5
0 .8
f
(±2)
d
(±0.05)
W t. nom
4.5
6.3
8.1
11.8
15.3
17.7
22.5
L
1
d
D
L
f
Construction
T ermination conductors and ruthenium oxide resistive
material are printed in a non-inductive pattern onto the
surface of a 96% alumina rod to which termination caps
and terminal wires are then attached. T he body of the
resistor is then conformally coated either in silicone
(protection code C ) or in epoxy (protection code P) .
Marking
T ype reference, resistance value and tolerance are
legend marked. T he resistance value code conforms to
IE C 62.
Solvent Resistance
Terminations
T he termination wires are gold plated.
T he body protection and marking are resistant to all
normal industrial clean ing solvents suitable for printed
circuits.
W elwyn C omponents res erves the right to make changes in product s pecification without notice or liability.
General Note
TT
All information is s ubject to W elwyn’s own tes t data and is cons idered acc urate at time of print.
electronics reserves the right to make changes in product specification without notice or liability.
General Note
07.11
©
Welwyn C omponents L imited
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
W elwyn E lectronics P ark, B edlington, Northumberland, NE 22 7AA, E ngland. T el: 016 70 82218 1 F ax: 01 670 8294 65 W eb: www.welwyn-tt.com
© TT electronics plc
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
09. 11
High Voltage
Non-inductive Resistors
High Voltage
WHVL Series
WHVL Series
Non-inductive Resistors
Performance Data
Load at rated power:
1000 hours at 25C
Overload:
1.5 x rated power not exceeding LEV for 5 seconds
Moisture resistance:
MIL Std. 202, method 106
Thermal shock:
MIL Std. 202, method 107, condition C
Type
R%
R%
R%
R%
Maximum
0.25
0.25
0.25
0.2
Derating Curve
Typical
0.1
0.1
0.1
0.1
Typical VCR (ppm/V)
Proportion of Pr (%)
WHVL2
WHVL3
WHVL5
WHVL7
WHVL10
WHVL12
WHVL15
<500M: -0.4
<1G0: -0.2
<1G5: -0.15
<2G5: -0.1
<3G0: -0.08
<4G0: -0.06
<5G0: -0.04
500M to 5G0: -0.75
1G0 to 10G: -0.4
1G5 to 15G: -0.3
2G5 to 25G: -0.15
3G0 to 30G: -0.12
4G0 to 40G: -0.1
5G0 to 50G: -0.08
120
100
80
60
40
20
0
0
25
50
75
100
125
150
175
200
225
250
Ambient Temperature (°C)
Application Notes
Due to the high voltage which can appear between the end cap and any adjacent metal part, resistors should be
mounted at an adequate distance from other conductors.
For some ultra-high voltage applications it is required to immerse the components in oil or SF
6
gas or pot them in void-
free silicone compound to reduce corona or surface tracking. The epoxy protection, code P, is suitable for these
applications.
The axial termination should not be bent closer than twice the diameter of the terminal wire from the resistor body.
Ordering Procedure
Example: WHVL10 with conformal coat at 100 megohms, 1% tolerance & ±50ppm/°C TCR:
WHVL10CC–100MFB
Type
Size
Protection
C
P
Silicone
Epoxy
Standard, for use in air
Low outgasing, for use in oil or SF
6
TCR
Y
D
15ppm/°C
25ppm/°C
C 50ppm/°C
Z 100ppm/°C
Value (use IEC62 code)
Tolerance (use IEC62 code)
C
B
0.25%
0.1%
F 1%
D 0.5%
J 5%
G 2%
Packing
B
Bulk Pack
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
General Note
07.11
©
Welwyn C omponents L imited
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
09. 11
PCB Design
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