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Application
The earth fault indicators type EASI-A and EASI-E operate 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. |
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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-A (1), or as a panel-mounted instrument EASI-E (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. The LED starts to blink, if the preadjusted operating current has been reached or exceeded.
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).
An external blinking lamp can be connected to the reading instrument, which is directly supplied with power coming out of the reading instrument.
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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 - A
(surface-
mounted)
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EASI - E
(panel-
mounted)
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with
remote indication (standard)
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21.07.01
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21.06.01
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with
remote indication
& blinking lamp
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21.07.02
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21.06.02
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