7SR18 Commissioning & Maintenance Guide
Unrestricted Page 46 of 54 ©2018 Siemens Protection Devices Limited
4.2 CURRENT TRANSFORMER SUPERVISION (60CTS)
Figure 4.2-1 Current Transformer Supervision
Current Inputs: I
L1
(I
A
), I
L2
(I
B
), I
L3
(I
C
)
Disable: 51N, 46IT, 46DT, 46BC
Map Pickup LED: 60CTS - Self Reset
Apply 3-Phase balanced current to the relay; reduce the current in any one or two phases to a level below 60CTS
I setting. Measure the delay to operation.
Gradually reduce the current until the element resets.
Setting Measured
60CTS Delay
60CTS Inps
60CTS Vnps
To Next Page
Loading...
