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Application
The earth fault indicator type EASI-R and EASI-ER operates in medium voltage radial networks with only one input.
The sum current of conductor L1, L2 and L3 is measured.
The minimum current is 10 A. (The instrument is mainly used in resistance- earthed or solidly earthed neutral systems.)
The earth fault indicator should be installed in each branch of the network.
Faults are indicated via a flag (day) and via an LED (night). |
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General Description
The earth fault indicator consists of the reading instrument (1), the sensor (4) including the connection cables (3).
The reading instrument is available as a surface-mounted instrument EASI-R (1), or as a panel-mounted instrument
EASI-ER (2).
The reading instrument is supplied with power by a lithium battery (10 - 15 years service time with 1000 hours blinking time).
The reading instrument is equipped with a LED and a flag indication. Both indicators start to operate, if the preadjusted operating current has been exceeded. This insures that the indication is well visible during the day and night.
There are different operating points (currents) possible for each instrument. The operating point must be in the range
of 10 A to 300 A. The indicator can be reset with the recovering voltage of the system, and/or after a preadjusted time delay
(for example: 1 - 2 - 4 - 8 h - other values are possible, too), or manually with a push button. The instrument is equipped with a test push-button.
Each instrument is equipped with a contact for remote indication (1 x changer or 2 x closer).
The sensor is placed in a black housing. This housing is fully sealed (protection grade IP 67). The sensor will be mounted on a cable with a plastic belt (plastic cable tie). In order to detect the earth fault current, a steel sheet is laid around the cable (indication accuracy: +/- 10%). The sensor and the reading instrument are connected by a cable
(standard lenght: 3000 mm - other length by request). |
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Order Data
Earth Fault Indicator Type EASI
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operating currents: 10 / 20 / 40 / 60 / 80 / 100 A*
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minimum impulse duration(ms):
reset time:
power supply:
sensor:
cable length (mm):
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40 / 60 / 80 / 160 *
1 / 2 / 4 / 8 h*
lithium battery
cable diameter:_________
____________(Standard- 3000 mm)*
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order-number.
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___________
**standard - other values can be chosen by special request
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Order-No. of
Earth Fault Indicator type EASI
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version
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EASI - R
(surface-
mounted)
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EASI - ER
(panel-
mounted)
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with remote indication (standard)
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21.40.01
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21.41.01
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with remote indication
& blinking lamp
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21.40.02
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21.41.02
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