GROUPED ELEMENTS
5
The C60 contains protection elements for neutral time overcurrent (ANSI device 51N) and neutral instantaneous
overcurrent (ANSI device 50N). A maximum of six neutral time overcurrent elements and eight neutral instantaneous
overcurrent elements are available, dependent on the CT/VT modules ordered with the relay. See the following table for
details.
CT/VT modules
Slot F
8F/8G
8H/8J
5.7.4.2 Neutral time overcurrent (ANSI 51N, IEC PTOC)
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) NEUTRAL CURRENT NEUTRAL TOC1(6)
NEUTRAL TOC1
5-188
NEUTRAL TOC4
NEUTRAL TOC5
NEUTRAL TOC6
NEUTRAL IOC1
NEUTRAL IOC2
NEUTRAL IOC3
NEUTRAL IOC4
NEUTRAL IOC5
NEUTRAL IOC6
NEUTRAL IOC7
NEUTRAL IOC8
Neutral current elements
Slot M
Time overcurrent
8F/8G
4
8H/8J
6
8F/8G
6
8H/8J
6
NEUTRAL TOC1
FUNCTION: Disabled
NEUTRAL TOC1 SIGNAL
SOURCE: SRC 1
NEUTRAL TOC1
INPUT: Phasor
NEUTRAL TOC1
PICKUP: 1.000 pu
NEUTRAL TOC1
CURVE: IEEE Mod Inv
Note:
Seen only if slot F or slot M has an 8H or 8J CT
module installed
Note:
Seen only if slot F or slot M has an 8H or 8J CT
module installed
See page 5-189
Note:
Seen only if slot F or slot M has an 8H or 8J CT
module installed
Note:
Seen only if slot F or slot M has an 8H or 8J CT
module installed
Note:
Seen only if slot F or slot M has an 8H or 8J CT
module installed
Note:
Seen only if slot F or slot M has an 8H or 8J CT
module installed
Instantaneous
overcurrent
4
6
6
8
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: Phasor, RMS
Range: 0.000 to 30.000 pu in steps of 0.001
Range: see Overcurrent Curve Types table
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS