GE 735

3-8 735/737 Feeder Protection Relay
GE Power Management
3.4 SWITCHES 3 SETUP AND OPERATION
3
3.4 SWITCHES 3.4.1 COMMUNICATION [11]
Switches are used to set the communication parameters. Move the switch to the right for a 1 or ON. To use the communica-
tions capability of the 735/737, a unique address must be chosen and the baud rate must match the system selected. Avail-
able baud rates of 1200, 2400, 9600, and 19200 are selected using switches 1 and 2 as follows: (ON = switch to right).
Chapter 4: COMMUNICATIONS describes the required data frame and message structure. Up to 31 relays (slaves) can be
connected on a twisted pair communications link to a single master. Each relay must have a unique address from 1 to 31 or
address conflicts will occur. Address 0 is reserved for broadcast mode and should not be used.
To select a given address, set switches 3 to 7 so the indicated numbers add up to the correct address. For example,
address 14 = 2 (4 on) + 4 (5 on) + 8 (6 on), with remaining switches 3 (=0) and 7 (=0) off. When switch 8 "TEST" is on, the
735/737 will accept communication commands to simulate different dial settings with computer controlled phase and
ground currents for testing and training purposes. Protection is disabled in the test position once simulation commands are
received from the communication port. Set this switch OFF to disable simulation during normal operation.
3.4.2 OPTION SWITCHES [14]
The option switches are selected according to the following table:
SWITCH 2 SWITCH 1 BAUD RATE
OFF OFF 1200 baud
OFF ON 2400 baud
ON OFF 9600 baud
ON ON 19200 baud
Table 3–1: OPTION SWITCHES
SWITCHES FUNCTION
1 2 3 4 5 6 7 8
PHASE TIME OVERCURRENT SHIFT
OFF OFF --- --- --- --- --- --- phase time overcurrent shift x 1.0
ON OFF --- --- --- --- --- --- phase time overcurrent shift x 0.5
OFF ON --- --- --- --- --- --- phase time overcurrent shift x 0.8
ON ON --- --- --- --- --- --- phase time overcurrent shift x 1.1
GROUND TIME OVERCURRENT SHIFT
--- --- OFF OFF --- --- --- --- ground time overcurrent shift x 1.0
--- --- ON OFF --- --- --- --- ground time overcurrent shift x 0.5
--- --- OFF ON --- --- --- --- ground time overcurrent shift x 0.8
--- --- ON ON --- --- --- --- ground time overcurrent shift x 1.1
SYSTEM FREQUENCY
--- --- --- --- OFF --- --- --- frequency: 60 Hz
--- --- --- --- ON --- --- --- frequency: 50 Hz
PICKUP/TRIP RELAYS – 737 ONLY
--- --- --- --- --- OFF OFF --- pulsed trip only
--- --- --- --- --- OFF ON --- latched cause of trip only
--- --- --- --- --- ON OFF --- pickup only
--- --- --- --- --- ON ON --- pickup & latched cause of trip
CUSTOM SCHEME
--- --- --- --- --- --- --- OFF standard factory defaults
--- --- --- --- --- --- --- ON programmed option settings