High Voltage Non-inductive Resistors
W HVL Series
Voltage ratings 11 to 67kV
Non-inductive printed serpentine design
Tolerance down to 0.05%
TCR down to 10ppm/°C
VCR down to -0.04ppm/V
Non-magnetic materials
RoHS compliant
Electrical Data
WHVL2 WHVL3 WHVL5 WHVL7 WHVL10 WHVL12 WHVL15
P ower rating at 25C watts 3.8 5 7 .5 10 13 .5 16 20
P ower rating at 70C watts 2.9 3 .8 5 .6 7 .5 10 12 15
Limiting element voltage in air kV 11 14 22 33 45 54 67
Limiting element voltage in oil* kV 22 28 44 66 90 108 134
R esis tance range ohms 1K 0 – 100G
R esis tance tolerance % ≤10G : 0.05%, 0.1%, 0.25%, 0.5%, 1%, 2% , 5%
>10G: 0.25%, 0.5% , 1% , 2% , 5%
TCR (25° C to 75° C ) ppm/C ≤10G : 10, 15, 25, 50, 100 >10G : 25, 50, 100
S tandard values E 24 preferred
Ambient temperature range C -55 to +225
Insulation resistance at 500V ohms >10G
Dielectric strength of insulation V >1000
* P rotection code P
P hysical Data
Dimensions in mm, weight in g
Type L (±0.5) L 1 (Max) D (±0.5) f (±2) d (±0.05) W t. nom
WHVL2 27 33 .5 4.5
WHVL3 37 43 .5 6.3
WHVL5 52 58 .5 8.1
WHVL7 77 83 .5
8.0
11.8
WHVL10 102 108 .5 8 .3 15.3
WHVL12 122 128 .5 17.7
WHVL15 152 158 .5 8.5
37 0 .8
22.5
General Note
W elwyn C omponents res erves the right to make changes in product s pecification without notice or liability. 11.09
All information is subject to W elwyn’s own tes t data and is cons idered acc urate at time of print.
©Welwyn C ompone nts L imited
W elwyn E lectronics P ark, B edlington, Northumberland, NE 22 7AA, E ngland. T el: 016 70 822181 F ax: 01670 829465 W eb: www.welwyn-tt.com
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) .
Terminations
T he termination wires are gold plated.
Marking
T ype reference, resistance value and tolerance are
legend marked. T he resistance value code conforms to
IE C 62.
Solvent Resistance
T he body protection and marking are resistant to all
normal industrial clean ing solvents suitable for printed
circuits.
L f
D
d
L1
Welwyn Components
High Voltage Non-inductive Resistors
WHVL Series
Performance Data
Maximum Typical
Load at rated power: 1000 hours at 25CR% 0.25 0.1
Overload: 1.5 x rated power not exceeding LEV for 5 secondsR% 0.25 0.1
Moisture resistance: MIL Std. 202, method 106 R% 0.25 0.1
Thermal shock: MIL Std. 202, method 107, condition C R% 0.2 0.1
Type Typical VCR (ppm/V)
WHVL2 <500M: -0.4 500M to 5G0: -0.75
WHVL3 <1G0: -0.2 1G0 to 10G: -0.4
WHVL5 <1G5: -0.15 1G5 to 15G: -0.3
WHVL7 <2G5: -0.1 2G5 to 25G: -0.15
WHVL10 <3G0: -0.08 3G0 to 30G: -0.12
WHVL12 <4G0: -0.06 4G0 to 40G: -0.1
WHVL15 <5G0: -0.04 5G0 to 50G: -0.08
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 SF6gas 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:
W H V L 1 0 C C – 1 0 0 M F B
Type
Size
Protection
C Silicone Standard, for use in air
P Epoxy Low outgasing, for use in oil or SF6
TCR
T
Y C
10p
15ppm/°C 50ppm/°C
pm/°C D 25ppm/°C Z 100ppm/°C
Value (use IEC62 code)
Tolerance (use IEC62 code)
W 0.05% C 0.25% F 1% J 5%
B 0.1% D 0.5% G 2%
Packing
B Bulk Pack
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability. 11.09
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
©Welwyn C ompone nts L imited
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com
Derating Curve
0
20
40
60
80
100
120
0 25 50 75 100125150175200225250
Ambient Temperature (°C)
Proportion of Pr (%)
