Setting - Toshiba GRL100-701B Instruction Manual

Scheme logic
The scheme logic for the stub protection is shown in Figure 2.13.2.1. The stub protection
performs three-phase tripping on the condition that the line disconnector is open
(DS_N/O_CONT = 0) and the overcurrent element has operated (OCH = 1). CB condition
(STUB_CB) can be added by using programmable BI function (PLC function). Tripping can be
disabled by the scheme switch [STUB-OC].
DS_N/O_CONT
1542
599 OCH-A
600 OCH-B
601 OCH-C
OCH
STUB_CB
1985
1900 STUBOC_BLOCK
1986 OCHTP_ON
1902 OCH_BLOCK

2.13.3 Setting

The setting elements necessary for the stub protection and their setting ranges are as follows:
Element Range
STUB OFF/ON
OCH 2.0 - 10.0 A
(0.4 - 2.0 A
STUB-OC OFF/ON
(*) Current values shown in the parentheses are in the case of 1 A rating. Other current values are in
the case of 5 A rating.
The OCH element and its setting are common with the SOTF protection.
1
[STUB-OC]
"ON"
1
&
&
Figure 2.13.2.1 Stub Protection Scheme Logic
Step Default
OFF
0.1 A 6.0 A
0.1 A 1.2 A) (*)
OFF
 110 
812
STUB-OC_TRIP
(M-TRIP)
&
821 OCH_TRIP
822 OCH-A_TRIP
823 OCH-B_TRIP
824 OCH-C_TRIP
OCH_TRIP
Remarks
STUB DIF protection
Overcurrent setting for STUB OC
STUB OC protection
6 F 2 S 0 8 5 0