Directional Elements (67P, 67N, 67G, 67Sg); Element - GE F650 User Manual

6.13 DIRECTIONAL ELEMENTS (67P, 67N, 67G, 67SG)

6.13 Directional elements (67P, 67N, 67G, 67SG)
In order to test directional units in the relay, instantaneous trips are commanded.
Two points are tested, per phase, test element.
In order to test the directional units, configure (in the Setpoint > Relay Configuration > Protection Elements screen of the
EnerVista 650 Setup program), some overcurrent element to be supervised by a directional unit. This way, if the directional
element is enabled and detects the fault in the block direction, then the overcurrent unit does not operate. If the directional
element is not enabled or if it is enabled and it detects a fault in a trip direction, then the overcurrent unit operates if the set
current level is exceeded.
6.13.1 67P element
Activate only protection elements 50PH and 67P and set the relay as follows:
67P Settings
Function
MTA
Direction
Block Logic
Pol V Threshold
Configure one of the outputs to be activated only by unit 50PH.
Apply the following tests:
Elements
50PH/67P
6.13.2 67N element
Activate only protection elements 50N and 67N and set the relay as follows:
67N Settings
Function
MTA
Direction
Polarization
Block Logic
Pol V Threshold
Configure one of the outputs to be activated only by unit
6-14
ENABLED
45 Deg
FORWARD
PERMISSION
30 V
Phase under test
Channel Magnitude
Mod Arg
IA 2 A 0º
IB 2 A 0º
IC 2 A 0º
ENABLED
-45 Deg
FORWARD
VO
PERMISSION
10 V
F650 DIGITAL BAY CONTROLLER
50PH Settings
Function
Input
Pickup Level
Trip Delay
Reset Delay
Polarization Phase
Channel Magnitude
Mod Arg
VIII 60 V 0º
60 V 180º
VI 0º
60 V
60 V 180º
VII 60 V 0º
60 V 180º
50N Settings
Function
Input
Pickup Level
Trip Delay
Reset Delay
50G.
CHAPTER 6: COMMISSIONING
ENABLED
PHASOR (DFT)
0.50 A
0.30
0.00
Element trip
NO
YES
NO
YES
NO
YES
ENABLED
PHASOR (DFT)
0.50 A
0.30
0.00
GEK-113000-AF