Toshiba 18 - 1250 A Benutzerhandbuch

53 

5.6.9.a (continued) Function 51: Internal Protection Features 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

ƒ  NOTE:  

To restore all settings back to the factory default, enter a value of 
127. If you see a numeric value other than the default value of 127, 
one or more features has already been altered. If you do not know 
which one or ones are changed, the simplest thing to do is 
determine what combination of settings you want now, and subtract 
from 127 then enter that number to accomplish it.  

 

Example: F051 reads a numeric value of 109, meaning that something 

has been changed, but you don’t know what. By subtracting 109 
from 127, you have a value of 18 remaining, and since 18 does not 
represent a single bit, it means that some combination has been 
used. Subtract the largest represented bit, i.e. bit #4 (value of 16), 
which leaves a value of 2, representing bit #1. So in this example, 
the Shunt Trip feature had been turned off, and the Expected Phase 
Sequence had been changed to A-C-B. 
 
If you do not wish to bother with what the previous settings were, 
simply decide which features you now want to be turned on and 
come up with a new numeric value to enter. For instance if you want 
all features on, but you need phase rotation to be A-C-B (bit #1), 
then simple subtract a value of 2 from 127, and enter 125 into F051. 

 

0 

rtd

 * 

Phase 
Rotation 
Trip 

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 

1 (On) 

1  

1 ABC 

Expected 
Phase 
Sequence 

2 = A-B-C Phase Rotation Sequence Only 
0 = A-C-B Phase Rotation Sequence Only 

1  

(A-B-C 

Rotation) 

2 

2 

PLa or 

PLc* 

Phase 
Current  
Loss 

Phase Current Loss, any phase current reading is 
less than 20% of unit max amp rating after 3 
seconds from Start command. 

1 (On) 

4 

3 SS* 

Shorted 
SCR 

At least one SCR has shorted; there is no voltage 
drop across the SCR phase assembly. 

1 (On) 

8 

4 ST* 

Shunt  
Trip 

Shunt Trip of the main Circuit Breaker or Isolation 
Contactor (if provided and wired to an Aux. relay 
in F060-F061)). 2 or more SCRs have shorted in 
opposing phases so current was flowing to the 
motor while the TE was in the Off state. 

1 (On) 

16 

5 PTc* 

PTC Input 
Trip 

PTC Trip function. This can be disabled so that a 

jumper is not required across the PTC inputs. 

1 (On) 

32 

6 

PLd or 

n3Ph 

Line Phase 
Loss Trip 

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. 

1 (On) 

64 

7 

--- 

Reserved 

Reserved for factory use 

0 (Off) 

128 

* = Operating Mode designation. See Fault Code List for description.