BECKWITH ELECTRIC M-3425A, Инструкция, Страница: 301 / 482

M‑3425A Instruction Book
6–14
25S Sync Check
VOLTAGE INPUTS:
Configuration V1
CURRENT INPUTS:
None
TEST SETTINGS:
Phase Angle Limit PA Degrees (0 to 90)
Voltage Limits
Upper Limit UL Volts (60 to 140)
Lower Limit LL Volts (40 to 120)
Sync Check Time Delay SD Cycles (1 to 8160)
Delta Voltage Limit DV Volts (1.0 to 50.0)
Delta Frequency Limit DF Hz (0.001 to 0.500)
Phase Select (AB, BC, CA)
Programmed Outputs Z Output (1 to 8)
Expanded I/O (9 to 23)
Test Setup:
1. Determine the Function 25S Sync Check settings to be tested.
2. Enter the Function 25S Sync Check 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. The 25 function requires only one phase voltage and V
X
for testing in the Line-to-Ground configuration.
The phase voltage used for reference may be selected through the
System Setup
menu. The
following tests will reference the phase voltage as V1, although any phase may be used for testing.
Line-to-Line testing will follow the same procedures, with V1 representing the proper Line-to-Line
phase input. Each test below can be performed using any of the three phases as a reference.
5. Connect test voltage inputs as shown in Figure 6-1, Voltage Inputs: Configuration V1.
6. Set V1 and V
X
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.
Phase Angle Limit Test:
1. Establish a phase angle difference of more than
PA
+5°.
2. Press and hold the
TARGET RESET
pushbutton, then slowly decrease the phase angle difference
until Output
Z
LED illuminates, or the pickup indicator illuminates on the IPScom
®
Function Status
screen. The phase angle difference should be equal to
PA
±1°.
3. Release the
TARGET RESET
pushbutton, then increase the phase angle difference.
The
OUTPUT
LED will extinguish.