BECKWITH ELECTRIC M-3425A, Инструкция

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6–21
Testing – 6
32 Directional Power, 3 Phase (#1, #2, #3)
VOLTAGE INPUTS:
Configuration V1
CURRENT INPUTS:
Configuration C1
TEST SETTINGS:
Pickup P PU (–3.000 to +3.000)
Time Delay D Cycles (1 to 8160)
Programmed Outputs Z OUT (1 to 8)
Expanded I/O (9 to 23)
VT Configuration Line-Ground
Power Sensing (Over/Under)
#3 Directional Power Sensing (Real/Reactive)
■ NOTE
: It would be efficient to disable the element with the lower pickup setting first and test the higher setting
operation, since the lower setting operation can be tested without disabling the higher setting.
Test Setup:
1. Determine the Function 32 Directional Power settings to be tested.
2. Enter the Function 32 Directional Power settings to be tested utilizing either the HMI or IPScom
®
Communications Software.
3. Disable all other functions prior to testing. Refer to Section 4.4 System Setpoints, for details that
describe disabling/enabling functions.
4. Connect test voltage inputs as shown in Figure 6-1, Voltage Inputs: Configuration V1.
5. Connect test current inputs as shown in Figure 6-3, Current Inputs: Configuration C1.
6. The level of current at which operation is to be expected for an individual power setting is given by
multiplying the PU pickup value (
P
above) by the
Nominal Current
value previously input to the relay.
The
Nominal Current
value is described in Section 4.2, Setup System and should be recorded on
Figure A-2, Setup System Record Form.
7. Set the three phase voltages to the
Nominal Voltage
. The
Nominal Voltage
value previously input
to the relay is described in Section 4.2, Setup System and should be recorded on Figure A-2, Setup
System Record Form.
Pickup Test
,
Positive/Forward Over Power Flow:
1. Press and hold the
TARGET RESET
pushbutton, then slowly increase the three phase currents until
the
32 DIRECTIONAL POWER
LED illuminates, or the pickup indicator illuminates on the IPScom
Function Status screen.
The level of operation will be equal to that calculated in Step 6, ±2% or ±0.002 PU, whichever is
greater.
2. Release the
TARGET RESET
pushbutton.
3. Decrease the currents. The
OUTPUT
LED(s) will extinguish.
4. Press
TARGET RESET
pushbutton to reset targets.