|
|
| Printable
Format |
| Power
Protection - Current and Earth Fault Relays |
|
|
|
| |
| |
| |
| |
|
|
| |
|
|
| |
Special
Features |
| |
|
Aesthetically
appealing and compact |
| |
|
Choices
of screw less terminals |
| |
|
Wireless
interiors makes it highly rugged and error proof |
| |
|
Facilities:
Test; Auto/Manual-Reset |
| |
|
2% Accuracy |
| |
|
Smart
design to fit on any standard mounting channel |
| |
Technical
Data |
|
|
Supply Voltage |
:
|
110V/220V/380V/415V
AC 50Hz or 12/24V DC |
|
|
Permissible Supply
Variation |
:
|
25% |
|
|
Output Contacts |
: |
2 change over (2-set point relay,
2 change over each) |
|
|
Switching Duty |
: |
6A resistive at 24V DC or 240V
AC |
|
|
Relay Status |
: |
De-energized in normal conditions |
|
|
Set Point |
: |
For Current relay = 40% - 120%
(with 5A CT:1A-6A)
For Earth fault relay = 50% - 100% (with 5A CT:2.5-5A) |
|
|
Signals |
: |
From 5A CT secondary (class 5P10
or 0.5 class of accuracy) |
|
|
Time Delay (optional) |
: |
0-10 sec settable |
|
|
Mode of Operation |
: |
Over Current |
|
|
Reset |
: |
Automatic/Manual (User Selectable)
|
|
|
Setting Accuracy |
: |
5% of Full Scale |
|
|
Mounting |
: |
Any standard mounting channel |
|
|
Dimensions |
: |
Width for CE/EFR-1 relays - 77mm
for CR-3
- 112mm
for CR3-2S
relays - 147mm
Height - 90mm |
| |
Operation |
| |
The current relay monitors the
current flowing through the circuit continuously through secondary
of CT which is in the current path. For 1 phase only CT is required
and for 3 phase one CT per phase is required. When current signal
goes out of the range selected on the dial, the relay status
will change. In case of 3 phase current relay, each phase of
current is sensed separately to provide protection. The relays
are provided with time delays. For earth fault relays the CT
is connected in earth fault current path. For e.g. Cable connected
between Alternator Neutral and Ground, or Neutral of the circuit. |
| |
Connection Details
|
|
|
Note:- Design and specifications may change due to our continuous
developmental efforts.
|
