Omron K7DD User Manual page 64

3 Installation and Wiring
 Installation of the special CTs
•
All the special CTs connected to one
unit of K7DD must have the same
ratings.
•
Make sure that the special CT settings
on the K7DD match the ratings of the
special CTs to be used.
•
Check the directions of the power
supply side (K) and load side (L) before
making the connections. The
measurement will not be correct if the
direction is wrong.
•
Release the split/fastening hook and clamp the special CT on the line for each phase and then press
the hook firmly until you hear it lock into place.
•
Do not ground the special CT. Doing so may result in malfunction.
Transistor Output Terminals
There are three transistor output terminals.
•
Alarm output 1: Number 25 and 26 terminals
Output an alarm when the feature value has
exceeded the alarm threshold (critical) set for
the feature value.
•
Alarm output 2: Number 27 and 28 terminals
Output an alarm when the feature value has
exceeded the alarm threshold (warning) set for
the feature value.
•
Output at Error: Number 29 and 30 terminals
Output an alarm when a self-diagnosis error
has occurred in the K7DD.
3 - 12
Load
side
(L)
Split/fastening
hook
K7DD
Microcomputer
Functional
insulation
25 26
27 28
29 30
Power Line Data Generator User's Manual (N233)
Power
supply side
(K)
For fixing of
binding band etc.
Alarm output 1
Alarm output 2
Output at Error