Specifications; Protection Elements - GE T35 Instruction Manual

SPECIFICATIONS

Other advanced UR order code options are available to support IEC 61850 Ed2.0 (including fast GOOSE, MMS server, 61850
services, ICD/CID/IID files, and so on), IEEE 1588 (IEEE C37.238 power profile) based time synchronization, CyberSentry
(advanced cyber security), the Parallel Redundancy Protocol (PRP), IEC 60870-5-103, and so on.
2.5 Specifications
2
Specifications are subject to change without notice.

2.5.1 Protection elements

The operating times include the activation time of a trip rated form-A output contact unless otherwise indicated. FlexLogic
operands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect with other
protection or control elements of the relay, building FlexLogic equations, or interfacing with other intelligent electronic
devices (IEDs) or power system devices via communications or different output contacts. If not specified, the operate times
given here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
PERCENT DIFFERENTIAL
Characteristic:
Number of zones:
Minimum pickup:
Slope 1 range:
Slope 2 range:
Kneepoint 1:
Kneepoint 2:
nd
2 harmonic inhibit level:
nd
2 harmonic inhibit function:
nd
2 harmonic inhibit mode:
th
5 harmonic inhibit range:
Operate times:
Harmonic inhibits selected:
No harmonic inhibits selected:
Dropout level:
Level accuracy:
INSTANTANEOUS DIFFERENTIAL
Pickup level:
Dropout level:
Level accuracy:
Operate time:
RESTRICTED GROUND FAULT
Pickup:
Dropout:
Slope:
Level accuracy:
0.1 to 2.0 x CT rating:
>2.0 x CT rating
Pickup delay:
Dropout delay:
Operate time:
PHASE/GROUND TOC
Current:
2-18
Differential restraint pre-set
1
0.05 to 1.00 pu in steps of 0.001
15 to 100% in steps of 1%
50 to 100% in steps of 1%
1.0 to 2.0 pu in steps of 0.001
2.0 to 30.0 pu in steps of 0.001
1.0 to 40.0% in steps of 0.1
Adaptive, Traditional, Disabled
Per-phase, 2-out-of-3, Average, 1-out-of-3
1.0 to 40.0% in steps of 0.1
20 to 30 ms at 60 Hz;
20 to 35 ms at 50 Hz
5 to 20 ms
97 to 98% of pickup
±0.5% of reading or ±1% of rated (whichever is greater) for two windings setup
2.00 to 30.00 pu in steps of 0.01
97 to 98% of pickup
±0.5% of reading or ±1% of rated (whichever is greater) for two windings setup
<20 ms at 3 × pickup at 60 Hz
0.005 to 30.000 pu in steps of 0.001
97 to 98% of pickup
0 to 100% in steps of 1%
±0.5% of reading or ±1% of rated (whichever is greater)
±1.5% of reading
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
<1 power system cycle
Phasor or RMS
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION