70HDT 3M, 70HDT Datasheet - Page 2

• Manufacturer Part Number: 70HDT
• Description: Tapes & Mastics SILICONE HD 1 X30'
• Manufacturer: 3M
• Type: Electricalr

Specifications of 70HDT

• Product: Tape
• Size: 1 in x 30 ft
• Description/function: Electrical Tape
• Lead Free Status / Rohs Status: RoHS Compliant part
• Other names: 5112857262

5.0
Physical Properties
Color
Thickness
ASTM-D-1000-76
Tensile Strength
ASTM-D-1000-76
Elongation at Break
ASTM-D-1000-76
Electrical Properties
Dielectrical Strength
ASTM-D-1000-76
Arc Resistance
ASTM-D-495-71
TEMPERATURE
130/266
150/302
(°C/°F)
90/194
operated either outdoors or in areas
subjected to contamination or moisture, shall
be overwrapped with at least one layer of
Scotch 70 Silicone Rubber Electrical Tape.
All splices on spacer cable operating at 15
kV and above shall be overwrapped with
Scotch 70 Silicone Rubber Electrical Tape.
All splices on silicone rubber cables or other
cables which can operate at room
temperatures in excess of 130°C/266°F, but
not exceeding 180°C/266°F, shall use Scotch
70 Silicone Rubber Electrical Tape as the
primary insulating material.
Characteristics and Test Data
Typical Electrical and Physical Properties
Dissipation Factor
Table 1 shows the dissipation factor versus
temperature of 70 Tape. This test was run
according to ASTM-D-150-68 at a stress of
50 V/mil and a frequency of 60 cycles per
second.
23/73
DISSIPATION FACTOR
VS. TEMPERATURE,
SCOTCH 70 TAPE
Table 1
Munsell 5BG7.0/0.4
Sky Blue Gray
.012 in.
12 lbs./in.
450%
875 V/mil
1 min. (minimum)
DISSIPATION
FACTOR (%)
1.3%
1.1%
0.5%
0.7%
6.0
TEMPERATURE
130/266
150/302
(°C/°F)
90/194
Dielectric Constant
Table 2 shows the dielectric constant versus
temperature of 70 Tape. This test was run
according to ASTM-D-150-68 at a stress of
50 V/mil and a frequency of 60 cycles per
second.
Performance Tests
Termination Tracking Test
Reduced-dimension terminations are
prepared according to 3M print 2047-B-16
(See Figure 1). Each specimen consists of 8
feet of 15 kV cable and two terminations.
The contaminant employed in this test is the
formula called out in ASTM Dust and Fog
Test D-2132, as shown below:
Flint (SiO
Clay 325 mesh
Salt (Na Cl) technical grade
Paper, filter pulp
This mixture is then ball milled using 3/4-
inch diameter ceramic cylinder. The milled
dust is then mixed with equal parts by
weight of water to make a slurry of paint
consistency.
Next, each termination is carefully coated in
such a manner as to deposit a uniform and
reproducible amount of contamination. The
following procedure is used:
1. Mix the slurry thoroughly.
2. Submerge the inverted termination into
3. Withdraw the termination from the
23/73
the slurry.
slurry, taking care not to throw off too
much excess slurry in rotating the
termination from the inverted to an
upright position. The majority of the
excess slurry should drain off when the
termination is upright.
DIELECTRIC CONSTANT
VS. TEMPERATURE,
SCOTCH 70 TAPE
2
floated) 240 mesh
Table 2
DIELECTRIC
CONSTANT
3.03
2.89
2.60
2.51
all by weight
85 parts
9 parts
3 parts
3 parts