4-48
Protection and Control
BE1-951
IN I
6 2
B L K
6 2 T IM E R
D
2861
-0
4
02-
07-
00
M od e =
0 -disa ble
1 -picku p/d ro po ut
2 -1sho t no nre trig
3 -1sho t retrig
4 -oscillator
5 -in teg ra tin g
6 - la tch
Figure 4-29. 62/162/262/362
Element
following qualifiers are applied to the voltage polarized ground direction element based on the user selected
input quantity:
V0IN inputs:
Test: 60FL=FALSE & 3P4W=TRUE & (IN > minimum) & (IN > I1*8%) & (V0 > minimum)
V0IG inputs:
Test: 60FL=FALSE & 3P4W=TRUE & (IG > minimum) & (V0 > minimum)
VXIN inputs:
Test: (IG > minimum) & (IN > I1*8%) & (VX > minimum)
VXIG inputs:
Test: (IG > minimum) & (VX > minimum)
I
Block and V Block settings are made using the SP-60FL command.
SP-60FL Command
Purpose:
Read or set the 60FL automatic blocking logic.
Syntax:
SP-60FL[=<I Blk>,<V Blk>]
Comments: See Table 4-39 for SP-60FL settings information.
SP-60FL Command Example
1.
During loss of potential conditions, control the current tripping levels with the 51P function and block
the phase and negative sequence voltage functions.
>SP-60FL=ENA,PQ
The 60FL element detects fuse loss and loss of potential by using voltage and current thresholds that are
expressed as a percentage of the nominal voltage and current values. See Section 3, Input and Output
Functions, for information on changing the nominal voltage and current values using the SG-NOM command.
GENERAL PURPOSE LOGIC TIMERS
The BE1-951 has two versatile, general purpose timers. Six modes of
operation enable the 62 and 162 elements to emulate virtually any
type of timer. Each element has one output that asserts when the
timing criteria is met according to the BESTlogic mode setting. Figure
4-29 shows the 62 element. The 162 element is identical in
configuration. Each input, output, and mode of operation is described
in the following paragraphs.
The INI logic input starts or initiates a timing sequence when TRUE
(logic 1).
A BLK input blocks timer operation when TRUE (logic 1).
The 62 or 162 output becomes TRUE (logic 1) when the time delay of the element expires.
Each timer has a T1 time setting and a T2 time setting. The function of these settings depends on the type
of timer as specified by the BESTlogic mode setting.
If a target is enabled for the element, the target reporting function will record a target when the timer output
is TRUE and the function trip logic expression is TRUE. Section 6, Reporting and Alarm Functions, Fault
Reporting Functions provides more detail about the target reporting function.
