GE Feeder Management Relay 750 User Manual

1-6 750/760 Feeder Management Relay GE Multilin
1.2 USING THE RELAY 1 GETTING STARTED
1
• Neutral Protection Settings
Time Overcurrent 1: curve shape = Moderately Inverse; pickup = 120 A; multiplier = 10
Instantaneous Overcurrent 1: Pickup = 120 A; Delay = 0 seconds
Instantaneous Overcurrent 2: Pickup = 2000 A; Delay = 0 seconds
You should now be familiar with maneuvering through and editing setpoint messages. As such, we will now limit our discus-
sion to just the values that must be programmed, in order to meet the requirements of the example application. Any set-
points not explicitly mentioned should be left at the factory default value.
b) S2 SYSTEM SETPOINTS
The S2 setpoints page contains setpoints for entering the characteristics of the equipment on the feeder electrical system.
In our example, these characteristics are specified under POWER SYSTEM DATA and INSTRUMENT TRANSFORMER DATA.
From this information and the resulting calculations, program S2 setpoints as indicated.
For current transformers, make the following change in the S2 SYSTEM SETUP Ö CURRENT SENSING setpoints page:
PHASE CT PRIMARY: "600 A"
For voltage transformers, make the following changes in the
S2 SYSTEM SETUP ÖØ BUS VT SENSING setpoints page:
VT CONNECTION TYPE: "Wye"
NOMINAL VT SECONDARY VOLTAGE: "66.4 V" (13.8kV ø-ø ≡ 7.97kV ø-N; 7.97kV / 120 = 66.4 V)
VT RATIO: "120:1" (14.4 kV VT
pri
/ 120V VT
sec
)
Make the following change in the
S2 SYSTEM SETUP ÖØ POWER SYSTEM setpoints page to reflect the power system:
NOMINAL FREQ: “60 Hz”
c) S3 LOGIC INPUTS SETPOINTS
The S3 setpoints page is for entering the characteristics of the logic inputs. In our example, these characteristics are spec-
ified under the Control System Requirements heading. Program S3 setpoints as indicated.
For breaker position monitoring, enter the following values in the S3 LOGIC INPUTS Ö LOGIC INPUTS SETUP setpoints page:
INPUT 2 NAME: "Brkr Position (52b)"
INPUT 2 ASSERTED LOGIC: "Contact Close"
then enter the following value in the S3 LOGIC INPUTS ÖØ BRKR FUNCTIONS setpoint page:
52B CONTACT: "Input 2"
For the Remote Open/Close and Reset RTU contacts, enter the following values in the
S3 LOGIC INPUTS Ö LOGIC INPUTS
SETUP setpoints page:
INPUT 3 NAME: "Local Mode"
INPUT 3 ASSERTED LOGIC: "Contact Close"
INPUT 4 NAME: "Remote Open"
INPUT 4 ASSERTED LOGIC: "Contact Close"
INPUT 5 NAME: "Remote Close"
INPUT 5 ASSERTED LOGIC: "Contact Close"
INPUT 6 NAME: "Reset"
INPUT 6 ASSERTED LOGIC: "Contact Close"
then enter the following values in the
S3 LOGIC INPUTS ÖØ CONTROL FUNCTIONS setpoint page:
LOCAL MODE: "Input 3"
RESET: "Input 6"
REMOTE OPEN: "Input 4"
REMOTE CLOSE: "Input 5"
To setup an Alarm-after-Delay Input. make the following changes to the S3 LOGIC INPUTS ÖØ USER INPUT A setpoints page:
Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English