Simulation - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

5.8 S6 TESTING
The simulation feature allows testing of the functionality of the relay in response to programmed conditions,
without the need of external AC voltage and current inputs. System parameters such as currents and voltages,
phase angles and system frequency are entered as setpoints. When placed in simulation mode, the relay sus-
pends reading actual AC inputs and generates samples to represent the programmed phasors. These samples
are used in all calculations and protection logic. Enabling this feature will turn off the IN SERVICE indicator,
turn on the TEST MODE indicator, and de-energize the self-test relay.
WHEN IN SIMULATION MODE, PROTECTION FEATURES DO NOT OPERATE BASED ON
ACTUAL SYSTEM INPUTS. IF SIMULATION MODE IS USED FOR FIELD TESTING ON EQUIP-
MENT, OTHER MEANS OF PROTECTION MUST BE PROVIDED BY THE OPERATOR.
CAUTION
S SIMULATION
S [ENTER] for more
SIMULATION SETUP:
S SIMULATION SETUP
S [ENTER] for more
SIMULATION FUNCTION:
Disabled
5
BLOCK OPERATION OF
OUTPUTS: 12345678
START FAULT MODE
SIGNAL: Disabled
START PLAYBACK MODE
SIGNAL: Disabled
5-88
This message indicates the start of the SIMULATION section. To continue
these setpoints press
EN TE R
This message indicates the start of the SIMULATION SETUP section. To
continue these setpoints press
Range: Disabled / Prefault Mode / Fault Mode / Playback Mode
Select the simulation mode required. Select Disabled to return the 745 to
normal operation. See Table 5–9: SIMULATION MODES on page 5–89 for
details on the simulation function modes.
Range: any combination of outputs 1 to 8
Select the output relays which must be blocked from operating while in
simulation mode.
An operator can use the simulation feature to provide a complete functional
test of the protection features, except for the measurement of external input
values. As this feature may be used for on site testing, provision is made
(with this setpoint) to block the operation of output relays during this testing,
to prevent the operation of other equipment. Note that the default setting
blocks the operation of all output relays.
Range: Disabled / Logc Inpt 1 (2-16)
Select any logic input which, when asserted, initiates Fault Mode simulation.
This signal has an effect only if the 745 is initially in Prefault Mode.
Range: Disabled / Logc Inpt 1 (2-16)
Select any logic input which, when asserted, initiates Playback Mode
simulation. This signal has an effect only if the 745 is initially in Prefault Mode.
745 Transformer Management Relay
or press for the next section.
M E SSA G E
or press
E N TE R
M E SS AG E
GE Power Management
5 SETPOINTS

5.8.4 SIMULATION

for the next section.