blast blanket reverse side (that was facing away …apic/uploads/forum/blast blanket tests on...
TRANSCRIPT
BLAST BLANKET
REVERSE SIDE (THAT
WAS FACING AWAY
FROM THE BLAST)
BLAST BLANKET TEST 1
-40000
-30000
-20000
-10000
0
10000
20000
30000
40000
50000
1 139 277 415 553 691 829 967 1105 1243 1381 1519 1657 1795 1933
TIME
V,
A,
psi
Time s
Current A
Voltage V
Pressure psi
Sensor1_t °C
Sensor2_t °C
Sensor1 cal/cm²
Sensor2 cal/cm²
TEST 1 – FAULT CURRENT
GRAPH
BB TEST 1
-20
0
20
40
60
80
100
120
140
160
180
1 353 705 1057 1409 1761 2113 2465 2817 3169 3521 3873 4225 4577 4929 5281 5633 5985 6337
TIME
C,
PS
I
Pressure psi
Sensor1_t °C
Sensor2_t °C
Sensor1 cal/cm²
Sensor2 cal/cm²
TEST1: PRESSURE GRAPH
Test 1- Readings CURRENT : 24.04 KA (Total r.m.s.)
Current (Peak): 40.01 kA
Arc Voltage: 953.3 V
Duration: 133.4 ms
I2t =77.18 kA2 sec
V*I *t= -2.410 MJoules
Maximum Top Pressure Sensor: no readings
Maximum Bottom Pressure Sensor: 160 psi
Sensor 1- Cal/ cm2: 4.17
Sensor 2 – Cal /cm2: 4.33
Sound Meter: placed at 56.6 feet away readings over meter range (>140dB)
BB DIVERTER
2nd TEST
500 kva Transformer with Regel filled Termination
4 TELEPOSTS
FOUR 25 KA
OBERON
BLANKETS
ONE 40 KA
SALISBURY
BLANKET
WRAPPED
AROUND THE HV
COMPARTMENT
TELEPOSTS
TEST -2 SET UP
FAULT ON PHASE 2 IN HV
COMPARTMENT
HV COMPARTMENT FILLED WITH
REGEL
FAULT CURRRENT: 25 KA FOR 8
CYCLES
TEST VOLTAGE: 4 KV
Test 2 -videos
Play normal speed video: Test 10-2796
EPCOR\Blast Blanket Testing - June
2010\Normal Video\Test_10-2796.avi
Play HS video: Test HS:10-2796 EPCOR\Blast Blanket Testing - June 2010\HS
Video\HS10-2796.cine
Termination cover
hanging to the
transformer from the
corner bolts.
Burnt Regel material
on the floor
Salisbury blanket on the
floor
Salisbury blanket
completely charred
and edges ripped.
Centre lead melted and
broken
Oberon Blanket
smoked
Burnt Regel
material splash
READINGS TEST1 TEST2 TEST3 TEST4
P1 (Top) - - 266 1251
P2 (Lower) 160 109 230 1063
Cal 1 Cal/cm2 4.17 3.25 3.73 5.24
Cal 2 Cal/cm2 4.33 3.55 3.72 5.35
Arc Voltage v 953 1054 567 1780
I peak kA 40.01 37.72 52.472 34.12
Duration ms 133 140 135 8.47
I2t kA2sec
V*I*t MJoules
77.18
-2.410
73.26
-2.857
94.39
-1.576
5.259
-0.3154
Sound db >140 >140 >140 133
Recommended Method 1
Oberon arc s. blankets
Teleposts
When Blast Energy can be
directed to the sidewalk
Recommended Method 2
2 Oberon arc s.
blankets Teleposts
Oberon Blankets
Forming a wall
When Blast Energy cannot be
directed to the sidewalk