Voltage display
The voltage indicator block is intended for visual monitoring of voltage in a 7.2-40.5 kV network, and can also perform a number of functions described below.
The EVI indicator block is a three-phase LED voltage presence indicator with phasing capability, requiring no auxiliary power.
The EVI-R indicator block is a three-phase LED voltage presence indicator with an integrated control relay with one contact group, which can be used for interlocking locks or remote control. The relay contact is open when two conditions are met simultaneously: presence of high voltage (on all phases simultaneously) and auxiliary power voltage for the relay.
When voltage is lost in all phases (or in specific ones, which can be configured using the installed toggle switches), the relay contact closes. Auxiliary power presence indication is displayed on the panel.
The EVI indicator block is a three-phase LED voltage presence indicator with phasing capability, requiring no auxiliary power.
The EVI-R indicator block is a three-phase LED voltage presence indicator with an integrated control relay with one contact group, which can be used for interlocking locks or remote control. The relay contact is open when two conditions are met simultaneously: presence of high voltage (on all phases simultaneously) and auxiliary power voltage for the relay.
When voltage is lost in all phases (or in specific ones, which can be configured using the installed toggle switches), the relay contact closes. Auxiliary power presence indication is displayed on the panel.
Technical specifications:
Parameter
Value
Indication voltage threshold
0.45Un*
Operating voltage frequency range
17-60 Hz
Minimum indication repetition frequency, not less than
1 Hz
Maximum response time to voltage change, not more than
1 s
Maximum length of connecting cables, not more than
12 m
Auxiliary Supply Voltage for Integrated Relay (for -R version)
48 V
60 V
10 V
220 V DC / 110 V
220 V AC
60 V
10 V
220 V DC / 110 V
220 V AC
Contacts specifications of the integrated control relay (for -R version)
2 A
220 V / AC
220 V / AC
Operating temperature range
-15°С to +55°С
Degree of protection
IP42
Nominal value of capacitance cast in CG3, at Un
20 pF - 40.5 kV
60 pF - 24 kV
120 pF - 12 kV
240 pF - 7.2 kV
60 pF - 24 kV
120 pF - 12 kV
240 pF - 7.2 kV
*At Uo < 0.1Un there is no voltage presence indication
At Uo > 0.15Un weak voltage presence indication
At Uo > 0.45Un normal voltage presence indication
At Uo > 0.15Un weak voltage presence indication
At Uo > 0.45Un normal voltage presence indication
EVI-T Tester
The tester is a cable with two connectors, one of which has an integrated LED indicator. Standard cable length is 2 m.
The phasing control device allows monitoring the correct connection of high-voltage bushings or the inconsistent phase connection of two test points in switchgear. Using EVI-T, it is also possible to detect a malfunction of the indication block.
The phasing control device allows monitoring the correct connection of high-voltage bushings or the inconsistent phase connection of two test points in switchgear. Using EVI-T, it is also possible to detect a malfunction of the indication block.
