Generator Unbalanced Load (Level 1 & 2) Ansi# 46 - Woodward easYgen-2000 Series User Manual

Configuration
Configure Monitoring > Generator > Generator Unbalanced Load ...
ID Parameter
2352 Self acknowl‐
edge
2358
4.4.1.10 Generator Unbalanced Load (Level 1 & 2) ANSI# 46
General notes
Formulas
Phase L1
Exceeding I ≥ (3 * I
L1
Falling below I ≤ (I + I
L1 L2
120
CL Setting range Description
[Default]
2 Yes The control automatically clears the alarm if the fault condition is no longer
detected.
[No] The control does not automatically reset the alarm when the fault condition is
no longer detected.
The alarm must be acknowledged and reset by manually pressing the appro‐
priate buttons or by activating the LogicsManager output "External acknowl‐
edgement" (via a discrete input or via an interface).
Unbalanced load is monitored according to how the parameters
"Generator voltage measuring" (parameter
"Generator current measuring" (parameter
figured. The unbalanced load alarm monitors the individual phase
currents of the generator. The percentage threshold value is the
permissible variation of one phase from the average measured cur‐
rent of all three phases.
Refer to
for the triggering characteristic of this monitoring function.
Phase L2
* P + I + I ) / 2 I
N A L2 L3
- 3 * I * P ) / 2 I
L3 N A
easYgen-2200/2500 | Genset Control
If this protective function is triggered, the display indi‐
cates "Unbalanced load 1" or "Unbalanced load 2" and
the logical command variable "06.16" or "06.17" will be
enabled.
Ä Chapter 9.1.1 "Triggering Characteristics" on page 481
This monitoring function is only enabled when Gener‐
ator voltage measuring (parameter
configured to "3Ph 4W" or "3Ph 3W" and Generator
current measuring (parameter
ured to "L1 L2 L3".
≥ (3 * I * P + I + I ) / 2
L2 N A L1 L3
≤ (I + I - 3 * I * P ) / 2
L2 L1 L3 N A
1851 Ä p. 96) and
1850 Ä p. 97) are con‐
1851 Ä p. 96) is
1850 Ä p. 97) is config‐
Phase L3
I ≥ (3 * I * P + I + I ) / 2
L3 N A L1 L2
I ≤ (I + I - 3 * I * P ) / 2
L3 L1 L2 N A
37535B