3-4
Input and Output Functions
BE1-951
Table 3-1. Measurement Functions Settings
Function
Range
Increment
Unit of Measure
Default
CT Ratio
1 to 50,000
1
Turns
1
CT Ratio, Independent
Ground Input (optional)
1 to 50,000
1
Turns
1
VTP Ratio
1 to 10,000
0.01
Turns
1
VTP Connection
3W, 4W, AN, BN, CN,
AB, BC, CA
N/A
N/A
4W
27/59 Pickup Mode
PP (phase-to-phase)
PN (phase-to-neutral)
N/A
N/A
PP
51/27R Pickup Mode
PP (phase-to-phase)
PN (phase-to-neutral)
N/A
N/A
PP
VTX Ratio
1 to 9,999
0.01
Turns
1
VTX Connection
AN, BN, CN, AB, BC,
CA, GR
N/A
N/A
AN
Nominal Frequency
50, 60
N/A
hertz
60
Nominal Volts
50 to 250,
0 = disabled
0.1
sec. volts
120
Nominal Amps
0.1 to 2
(1 ampere sensing)
0.01
sec. amperes
1
0.5 to 10
(5 ampere sensing)
0.01
sec. amperes
5
Phase Rotation
ABC, ACB
N/A
N/A
ABC
SG-CT Command
Purpose:
Read or set phase/ground CT ratios.
Syntax:
SG-CT<x>[=<CT ratio>]
Comments: x = P (three-phase current input) or G (optional independent ground input)
CT ratio is the current transformer ratio and is entered as primary/secondary,
primary:secondary, or turns. CT ratio is always reported as turns. See Table 3-1 for SG-CT
settings information.
SG-CT Command Example
1.
Enter a phase CT ratio of 800:5 and a neutral CT ratio of 50:5.
>SG-CTP=800:5; SG-CTG=10
SG-VTP Command
Purpose:
Reads or sets the VT ratio, connection, 27/59 sensing mode, and 51/27R sensing mode.
Syntax:
SG-VTP[=<VTP ratio>,<VTP connection>,<27/59 Pickup Mode>,<51/27R Pickup Mode>]
Comments: VT_ratio is the voltage transformer ratio entered as primary/secondary, primary:secondary, or
turns. VT ratio is always reported as turns. See Table 3-1 for SG-VTP settings information.
SG-VTP Command Examples
1.
Enter the following parameters: VT ratio is 2400:120, connected single phase to A-N. The 27/59 and
51/27R modes must be PN in this case so this parameter is optional.
>SG-VTP=2400:120,AN,PN,PN
or SG-VTP=20,AN,PN,PN
