Toshiba GR 200 Series, Instruction Manual

Page: 77 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 56 -
For Z1S and Z1G tripping, either instantaneous tripping or time delayed tripping can be
selected; hence, the scheme switch [
Z1CNT-INSTOP
] is provided for the selection of the trip
mode, which is described later.
(v)
Autoreclose initiation blocking
If ZS and ZG detect a fault, the output signals of ZS and ZG are generated in trip circuit (TRC)
and the CB is tripped. If autoreclose (ARC) is not required following the operation of Z*S,
Block
can be set using the scheme switch [
Z*S-ARCBlk
]. Conversely, if ARC is required following the
operation of Z*S, then
Non
can be set using the scheme switch [
Z*S-ARCBlk
]. Similarly, for ZG
scheme the following switch is provided:
[Z*G-ARCBlk
].
The function for blocking the initiation of autoreclose is also represented in Figure 2.1-43
and Figure 2.1-51 of section 2.1.7.
Note: The operation and setting of the ARC are discussed separately. For more
information on ARC, see Chapter
Relay application: Autoreclose and voltage
check.
(vi)
Zone 1 control
Both Z1S and Z1G offer a variety of trip modes in order to satisfy the diverse nature of the
many schemes and applications in which the relay is required to operate. The following scheme
switches provide the flexibility required to meet the wide range of applications. Figure 2.1-31
shows the scheme logic for Zone 1 control. When signal “Z1CNT_MPROT” is active, user can
control Z1S and Z1G as follows:

A trip signal is blocked if
On
is set for the scheme switch [
Z1CNT-TPBlk
].

A three-phase trip is initiated by Z1G on the occurrence of a fault if
On
is set for the
scheme switch [
Z1CNT-3PTP
].

Autoreclose is blocked if
On
is set for the scheme switch [
Z1CNT-ARCBlk
].

Both Z1S and Z1G generate an instantaneous operation signal if
On
is set for the
scheme switch [
Z1CNT-INSTOP
].