Toshiba GR-200 Series Instruction Manual page 50

Multi functional protection ied

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required, Block is set for the scheme switch [OC1-ARCBlk]. Block is set for the scheme switch

[OC1-ARCBlk] as a default.

Signal of OC trip

When a user requires an alarm signal in place of the trip signal; for example, set Alarm for the

scheme switch [OC1-UseFor]. Trip is set for the scheme switch [OC1-UseFor] for the normal

trip operation.

Scheme logic

The scheme logic for both the non-directional and the directional OC1 element is illustrated in

Figure 2.1-8; Figure 2.1-9 shows grouping commands for the trip circuit (TRC). Each phase of

the OC1 element issues a pick-up when a current has been exceeded over the setting, and the

pick-up signal is transferred to into the TRC as a trip signal. (For more information about the

TRC, see Chapter 2.23)

For DT characteristic

For IDMT characteristic

800001EBB0 OC1_BLOCK

800001EBB4 OC1_INST_OP

†Note: The presence of 'OC1-OR' and 'OC1PU-OR' signals depends on the operation

characteristic defined with setting [OC1_Timer], as shown in Table 2.1-7.

Figure 2.1-8 Scheme logic for the OC1

0.00–300.00s

6F2T0200 (0.15)

GRE200 (1,2)

To Grouping logic

OC1-OPT-TRIP

OC1-OPT-ALARM

OC1-ARC-BLOCK

Chapters

Gre200-1 Gre200-2