Toshiba GR-200 Series Instruction Manual page 100

Multi functional protection ied

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SEF1 element in the forward characteristic

Non-operation zone

RP1 element in the forward characteristic

Non-operation zone

Figure 2.4-6 Forward characteristic (45°) restrained by setting [RP1]=2 watt

Note: If the reverse characteristic is required in the SEF1 and PR1 elements, set [SEF1-

DIR]=Reverse so that a reverse one will be obtained. RP1 operation signal can be

found at signal monitoring point 'RP1R' during that time.

Note: RP1 operation will be canceled by undervoltage (RP-UVBLK) and undercurrent

(RP-UCBLK) elements, when the input signals are not obtained sufficiently (i.e.,

Ve and Ie are less than 0.5V and 0.001A). For more information, see Chapter

Technical description: Transformer module for AC analog input

The RP element will be characterized by Watt metric setting; hence, a value, which is ruled by

the scalar product of an entering current (Ie) and applied voltage (Ve), should be set for the

setting [RP1].

Setting of standby earth-fault

In which case the residual current is injected from the neutral circuit at the lower side of a

transformer, the standby earth-fault protection can trip the CB located at the lower side of the

transformer; the trip command is issued by the SEF1 element, but issuing is retarded by

setting [TSEF1S2] compared with the original SEF1 issuing. The user should set On for the

scheme switch [SEF1S2-EN]†.

†Note: The standby earth-fault protection is only available for the SEF1 element.

Scheme logic

The scheme logic for both the non-directional and the directional SEF1 element is illustrated

Margin=2.5° (fixed)

Operation zone

SEF-Vpol (Ve180°)

Setting [SEF1-Angle] = -45°

Setting [RP1] = 2 watt

Operation zone

SEF-Vpol (Ve180°)

Setting [SEF1-Angle] = -45°

0.00-300.00s

6F2T0200 (0.15)

GRE200 (1,2)

Chapters

Gre200-1 Gre200-2