Schweitzer Engineering Laboratories SEL-701-1, Instruction Manual

Page: 195 / 452

Date Code 20011009
SEL-701-1 Monitor
Commissioning
Selected Functional Tests
6.21
Accuracy Test, Delta Voltages
Step 1. Connect the current sources to the IA, IB, and IC current inputs
(5 A or 1 A, as indicated by the ITAP setting). Connect the voltage
sources to the voltage inputs in delta configuration. Refer to
Figure 6.4 on page 6.10 .
Step 2. Using the front-panel Set Monitor\Monitor Elements\General Data
function or serial port
SHOW command, note the CTR, PTR, and
PHROT settings.
Step 3. Referring to Figure 6.4 on page 6.10 , set the current and voltage
source magnitudes. The phase angles you should apply depend on the
PHROT setting. Use the front-panel Meter Values\Instantaneous
Meter function to verify the monitor measurements.
Table 6.17 Power Measuring Accuracy Test Values, Delta Voltages
Applied Currents
and Voltages Real Power (kW)
Reactive Power
(kVar)
Power Factor
(pf)
PHROT = ABC Expected : Expected : Expected :
lag
Measured : Measured : Measured :
PHROT = ACB Expected : Expected : Expected :
lag
Measured : Measured : Measured :
Ia 2.5A 26
°
–
∠
=
P 0.4677
CTR PTR
•
•
=
Q 0.2286
CTR PTR
•
•
=
pf 0.90 =
Ib 2.5A 146
°
–
∠
=
Ic 2.5A 94
° ∠
=
Vab 120V 30
° ∠
=
Vcb 120V 90
° ∠
=
Ia 2.5A 26
°
–
∠
=
P 0.4677
CTR PTR
•
•
=
Q 0.2286
CTR PTR
•
•
=
pf 0.90 =
Ib 2.5A 94
∠
=
Ic 2.5A 146
°
–
∠
=
V ab 120V 30
°
–
∠
=
Vcb 120V 90
°
–
∠
=