Toshiba TE Series Instruction Manual page 60

Basic Installation and Operation Guide
51 | P a g e
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5.6.8.a (continued) Function 51: Internal Protection Features
Fault
Bit Protection
Display
# Function
Code
Phase
0 ROT* Rotation
Trip
Expected
1 ABC Phase
Sequence
Phase
PLa or
2 Current
PLc*
Loss
Shorted
3 SS*
SCR
Shunt
4 ST*
Trip
PTC Input
5 PTc*
Trip
PLd or Line Phase
6
n3Ph Loss Trip
7 --- Reserved
* = Operating Mode designation. See Fault Code List for description.
Table 5.6.8.a: Function 51 table of Hardware Protection Features

Note:
To restore all settings back to the factory default, enter a value of
127. A value other than the default value of 127 indicates that one or
more functions have been changed. To determine which of the
protective functions have been changed/turned-off subtract the value
displayed from 127 and compare the result against the 'decimal
value' column shown in table 5.6.8.a.
Example: F051 reads a value of 109.Subtract109 from 127 and a value
of 18 remains. The value 18 does not represent a single bit value
indicating that more than one function has been changed.
Referring to Table 5.6.8.a, find the largest decimal value as shown in
the 'decimal value' column smaller than 18. In this case, it's a value
of 16 (bit 4). This leaves a value of 2 (18 minus 16) which represents
bit 1 (2). So in this example a value of 109 indicates that the Shunt
Trip feature had been turned off (bit 4), and the Expected Phase
Sequence had been changed to A-C-B (bit 1).
Instead of determining the previous selection add up all values in
'decimal value' column of the functions to be turned off and subtract
this value from 127 and program the result into F051.
TE Series Digital Solid State Soft Starters 18 – 1250A
Description
Phase Rotation protection.
Phase rotation must match selection in Bit #2
below. Setting to Off (0) will make the TE
insensitive for use behind a reversing contactor
2 = A-B-C Phase Rotation Sequence Only
0 = A-C-B Phase Rotation Sequence Only
Phase Current Loss, any phase current reading
that is less than 12% of the CT rating after 3
seconds from Start command.
At least one SCR is shorted; There is no voltage
drop across the SCR phase assembly.
Shunt Trip of the main Circuit Breaker or Isolation
Contactor (if provided and wired to an Aux. relay
in F060-F061). Two or more SCRs have shorted
in opposing phases so current is flowing to the
motor while the TE was in the Off state.
PTC Trip function. This can be disabled so that a
jumper is not required across the PTC inputs.
Protection against loss of input line voltage.
Disable when using an In-Line Isolation Contactor
or any other system that normally removes line
power from the starter. Resets automatically when
line voltage returns.
Reserved for factory use
Default
Decimal
Bit
Value
Setting
0 (Off) 1
1
(A-B-C 2
Rotation)
1 (On) 4
1 (On) 8
1 (On) 16
1 (On) 32
1 (On)
64
0 (Off) 128