apoorv the great: 2011

Monday, 31 October 2011

5
10
3-4
1-2
9
E
A
L
B
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d2
d3
D
d1
Type A B C D E L S d1 d2 d3 N° holes gas vol. WEIGHT
BR25 215 160 85 115 140 200 17 25 14 68 4 125 cm3 2,9 kg.
BR50 254 178 125 165 140 195 18 50 18 102 4 235 cm3 4,9 kg.
BR80 293 193 160 200 140 195 18 80 18 138 4/8 235 cm3 5,8 kg.
POS DESCRIPTION
1-2 RELEASE TERMINALS
3-4 ALARM TERMINALS
5 EARTH TERMINAL
6 BREATHER COCK
7 VALVE OF PNEUMATIC TEST
8 MECHANICAL TEST OF THE
ALARM/RELEASE CIRCUIT
9 CABLE GLAND PG 16
10 DRAIN PLUG7
BUCHHOLZ RELAY type BS 25 ñ BS STANDARD
C D
D
C
d1
d2
A
B
L
S
E
8
7
6
10
3-4
1-2
5
9
POS DESCRIPTION
1-2 RELEASE TERMINALS
3-4 ALARM TERMINALS
5 EARTH TERMINAL
6 BREATHER COCK
7 VALVE OF PNEUMATIC TEST
8 MECHANICAL TEST OF THE
ALARM/RELEASE CIRCUIT
9 CABLE GLAND PG 16
10 DRAIN PLUG
Type A B C D E L S d1 d2 N° holes gas vol. WEIGHT
BS25 215 160 50,8 75 140 127 12 25 M10 4 125 cm3 2,2 kg.8
BUCHHOLZ RELAY type BS 50-80 ñ BS STANDARD
POS DESCRIPTION
1-2 RELEASE TERMINALS
3-4 ALARM TERMINALS
5 EARTH TERMINAL
6 BREATHER COCK
7 VALVE OF PNEUMATIC TEST
8 MECHANICAL TEST OF THE
ALARM/RELEASE CIRCUIT
9 CABLE GLAND PG 16
10 DRAIN PLUG
Type A B C D E L S d1 d2 d3 N° holes gas vol. WEIGHT
BS50 288 178 110 140 140 185 14 50 11 - 6 235cm3 4,1 kg.
BS80 288 178 130 160 140 185 14 80 11 - 6 235cm3 4,3 kg.
E
S
L
A
B
8
7
6
10
3-4
1-2
5
d1
C
D
9
d29
Finished product quality control tests.
Hydraulic test for tightness for the body : the aluminium alloy casing is filled with oil at the temperature of
90°C and at the pressure of 300 kpa.
After 4 hours no leakages must be observed.
The same test is carried out for floats and switches.
Dimensional check.
Hydraulic test for tightness of the finished relay : the test is carried out by filling the Buchholz relay with
oil at the temperature of 90°C and at the pressure of 200 kpa. Said test lasts 4 hours. During this period no
oil leakage is admitted.
Manual and pneumatic inspection of the electric contacts actuation : This test is carried out both on
alarm and trip circuits. Itís performed by means of visual indicators mounted on a panel-board.
Check of tripping velocity : performed by mounting the relay on a oil filled pipeline. By means of a
calibrated flow meter and of suitable visual indicators mounted on a panel-board.
Check of instrument mechanical protection degree : IP 54.
Insulation test : carried out by means of a microprocessor controlled testing unit