32 • Control Keypad
________________________________________________________________________________________________
7.7.3 Protection Parameters – page 3
PROTECTION PARA.
SETTINGS
Note:
The settings of the PROTECTION PARAMETERS listed below are related to
the level and time delay of each protection parameter. The functionality of
each protection must be programmed in the TRIPPING /ALARM OPTIONS.
Refer to section
7.7.5 page 35.
Display and default
values
Range Description
UNDER CURRENT
0 % OF FLA
0 %-95% Sets the value in % of “load rated current” below which the
UNDER CURRENT protection is triggered.
Note:
When TPS is in ZERO CROSSING mode of operation, the
measured current used for this function is the ON state
current value.
U/C DELAY
10.0 SEC.
0.1 SEC.-60.0 SEC. Sets the time delay for the UNDER CURRENT protection
after current has reached the pre-set level.
OVER CURRENT
120 % OF FLA
50 %-150% Set the value in % of load rated current above which the
OVER CURRENT protection is triggered.
Notes:
1. When TPS is in ZERO CROSSING mode of operation,
the measured current used for this function is the ON state
current value.
2. O/C includes also fast (< 60mS) O/C with fixed level of
180% TPS RATED CURRENT.
O/C DELAY
5.0 SEC.
0.1 SEC.-60.0 SEC. Sets the time delay for the OVER CURRENT protection
after current has reached the pre-set level.
UNBALANCE LVL 1
10% OF FLA
1%-100% Sets the protection for unbalanced load conditions such as
disconnected (failed) load resistor(s).
This function is calculated according to : (Imax – Imin)/I *
100.
Where:
Imax - is the maximum current measured in any phase
Imin - is the minimum current measured in any phase.
I – is the larger value of Load Rated Current or actual
phase maximum phase current .
Notes:
When TPS is in ZERO CROSSING mode of operation, the
measured current used for this function is the ON state
current value.
When WYE, NEUTRAL NOT CONNECTED (NC) applies
set this protection to the lowest practical value and trip the
TPS upon UNBALANCE or else load will damage.
U/B LVL 1 DELAY
10.0 SEC.
1.0 SEC.-60.0 SEC
Sets the time delay for the CURRENT UNBALANCE
LEVEL 1 protection after current unbalance has reached
the above set level.
UNBALANCE LVL 2
20% OF FLA
1%-100% Same as UNBALANCE LVL 1.
U/B LVL 2 DELAY
5.0 SEC.
1.0 SEC.-60.0 SEC Sets the time delay for the CURRENT UNBALANCE
LEVEL 2 protection after current unbalance has reached
To Next Page
Loading...
Need help?
General Specifications
