RECLOSER CONTROL EVRC2A-N6,NT
http://www.entecene.co.kr
82
EN
HANCED
TEC
HNOLOGY
6. SYSTEM SETUP
System set shall be set independently for each bank. However, from version 4.41, regardless of
bank, it will be applied to all other banks if it is set in a bank.
Sets following items for System
y
CT Ratio
y
VT or PT Ratio
y
Power Line Frequency, Phase rotation
y
Panel sleep time
y
Opto-Input setting
y
Relay output setting
y
Loop Control setting – Option
y
Set Group Change setting – Option
y
Power Quality – Option
6.1. Current Sensing
6.1.1. Description
This Setting group is critical for all over-current protection features that have settings specified
in multiples of CT rating. When the relay is ordered, the phase, ground, and sensitive ground CT
inputs must be specified as 1 Amp.
As the phase CTs are connected in wye (star), the calculated phasor sum of the three phase
currents (Ia + Ib + Ic = Neutral Current = 3 I0) is used as the input for the neutral over-current. In
addition, a zero-sequence (core balance) CT which senses current in all of the circuit primary
conductors, or a CT in a neutral grounding conductor may also be used. For this configuration,
the ground CT primary rating must be entered. To detect low level ground fault currents, the
sensitive earth input may be used. In this case, the sensitive ground CT primary rating must be
entered.
For additional details on CT connections, refer to
(see 13.12. Current Inputs Wiring Diagram)
.
Summary of Contents for EVRC2A-N6-NT
Page 2: ......
