Transcript An Equal Potential Clamp is a device than equalises two different

KEP - 1000
An Equal Potential Clamp is a device than
equalises two different potentials .
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Unexpected rises between different power systems as a
result of LIGHTNING, WIND, ACCIDENT or SYSTEM
MALFUNCTION.
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A passive component that forms a hard bond between
the potentials to reduce the difference to a safe level..
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ARRESTOR PERFORMANCE
Voltage
Energy rating
Gas Arrestor
Spark over Voltage
Max Impulse Breakdown
Nominal AC Discharge Current
DC Holdover Voltage
Nom. alternating discharge
Current (50 hZ 9 cycles) (A)
Long duration surge
Nominal Impulse Discharge
Insulation Resistance
Series impedance once fired
Max Capacitance
Storage / operating Temp
Weight
70volts
500 kA 8/20 uS
2 terminal device
56 ~ 84 VDC
<600v / uS … 100v/uS
500 Amps
50 volts
4000 Amps
4kA for > 400 mS
200KA 10/350uS
> 10 megohm
< 0.025 ohms
<20 pF
-40 ~ +90 C
0.5kgs
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When a voltage is applied across the terminals in
excess of 70 volts the gas fires . When this happens it
effectively creates a short circuit across the
terminals to create a “HARD BOND”
[resistance <0.025 ohms].
This bond will continue until the voltage reduces
below 70 volts.
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Shorting bar
4 x Silver plated
contacts .. 20mm dia.
Gas arrestor
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Heat sensor
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12 volt Battery for solenoid
System
Test
shield
Cable connection
Heavy duty solenoid
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M20 brass
studs for
cable
terminations
x2
Cables enter
via cable
glands in
base of IP66
rated cabinet
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GUARD INSULATOR ……. NORMAL
GUARD INSULATOR …. NORMAL
OPERATED / CONTACTS CLOSED
GUARD INSULATOR IN TEST POSITION..
INSULATOR COVERS CONTACTS WHEN
TEST SWITCH PUSHED ………….
RETURN GUARD TO NORMAL AFTER
TEST
•Wherever a need exists to clamp 2 separate electrical
earthing systems together during fault conditions ONLY.
•Where-ever protection is necessary on ELV equipment
against very high sustained surges and overvoltage
conditions.
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Operational conditions need these 2 systems be separated.
However for safety reasons these separate systems should be
bonded together.
Possible dangerous touch potentials exist.
Damage to equipment that could cause a disaster.
Areas may have high voltages present that can damage
ELV equipment.
•Conductors attached to these circuits may be exposed
to surge voltages and currents during fault conditions.
•In areas of high vulnerability, it may be advisable to
ensure the fault current has a predetermined path.
Trucks
High machinery
Cranes
Double deck buses
Radio aerials and
Ladders.
ht
Such as:Track relays
Surge arrestors
Track circuit wiring
Track circuit fuses
plus unknown signaling equipment
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KAYSAN
Equal Potential Clamp
KEP - 1000
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Made and Designed in New Zealand by Kaysan
Gas Arrestor Made by Prosurge Electronics for Kaysan
www.kaysan.co.nz
[email protected]
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A member of GRS.
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