Basler BE3-GPR, Instruction Manual

Page: 10 / 91

General Information 1-3
25
Sync-Check With Dead Bus Phase angle is settable from 2 to 20 degrees in one degree steps, and
voltage difference is adjustable from 1 to 100 Vac in one volt steps. Both
the time delay (which is variable from 0.2 to 2 seconds in 0.1 second
steps), and the slip frequency (which is variable from 0.1 hertz to 1.0
hertz in 0.1 hertz steps) qualify the in-sync condition. Dead Bus is
settable from 10 to 50 volts in increments of one volt. Accuracy is: Delta
Voltage — ±2% or ±1 V, whichever is greater throughout operating range
of 5 to 100 volts; Delta (slip) Frequency — ±0.02 Hz throughout operating
range of 0.1 to 0.5 Hz, Delta phase angle — ±0.5 degrees. This function
is an option available only on the paralleled generator version of the
relay. Repeatability is ±1.5 %.
47
Phase Balance Phase balance measures the maximum voltage difference between any
two line-to-line phases. Trip point and reset points are settable from 5 to
100 volts in 1 volt steps. The timing is settable from 0 to 20 seconds in
one second steps. Accuracy is ±3% or ±2 V, whichever is greater
throughout operating range of 5 to 100 volts. Repeatability is ±1.0 %.
40
Loss of Excitation Measures the reactive current into the generator. In the five ampere CT
setting, trip point and reset points are settable from 0.15 to 2.5 amperes
in 0.01 ampere steps. In the one ampere CT setting, trip point and reset
points are settable from 0.03 to 0.5 amperes in 0.01 ampere steps. Trip
timing is adjustable from 0 to 20 seconds in one second increments.
Accuracy is ±3.5% or ±0.05 ampere, whichever is greater throughout
operating range of 0.15 to 2.5 amperes. This is an option available only
in the paralleled version. Repeatability is ±1.0 %.
51N
Neutral Ground Fault (NGF) Provides protection from ground fault occurrence by measuring RMS
neutral currents. In the five ampere CT configuration, trip point and reset
points are settable from 0.2 to 3 amperes in 0.01 ampere steps. Trip
point and reset points are settable from 0.04 to 0.6 amperes in 0.01
amperes increments, in the one ampere CT configuration. Trip timing is
adjustable from 0 to 2 seconds in 0.1 second steps. Accuracy is ±2% or
±0.01A whichever is greater throughout operating range of 0.2 to 3.0
amperes.
51V
Time Overcurrent (TOC) with
Voltage Restraint Provides protection from overcurrent occurrence by measuring RMS line
currents. In the five ampere CT configuration, trip point and reset points
are settable from 0.1 to 9.99 amperes in 0.01 ampere steps. Trip point
and reset points are settable from 0.10 to 2.00 amperes in 0.01 amperes
increments, in the one ampere CT configuration. Accuracy is ±2.5% or
±0.05A whichever is greater throughout operating range of 0.1 to 5.0
amperes.
Time-Current Characteristic
Curves
Sixteen inverse time functions and one fixed time function can be selected.
Characteristic curves for the inverse and definite time functions are defined
by the following equation.
T
A D
M C
B D K
T
N
=
⋅
−
+ ⋅ +
T
T
= Time to trip when M
≥
1
D = TIME DIAL setting (0.0 to 9.9)
M = Multiple of PICKUP setting (0 to 40)
A, B, C, N, K = Constants for the particular curve
See Table 1-1 for the time characteristic curve constants.