TAVRIDA ELECTRIC Rec15, Technical Manual

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measured current does not exceed the pickup setting and the Reset timer stops counting, a current reclosing
cycle will be continued. In the case that, after closing, the measured current does not exceed the pickup setting
within the Reset time period, a new autoreclosing sequence will be enabled and will be executed for
consequent faults. The Reset time counter starts counting from zero for each automatic closing event in an
autoreclosing sequence.
First closure time (SST timer)
The Single shot to lockout algorithm is supported by the AR OC element. This function allows tripping and
lockout (preventing autoreclosing) if a fault has been detected by the operator during the First closure time.
The Single shot to lockout function will be disabled in case “Unconditional AR” is selected for First closure
mode. Recloser can make up to 4 closing operations including the first close initiated by operator.
Overcurrent Interruption Detection (OCID)
This element is available for OCR mode “Sectionalizer” only.
This element provides detection of the overload, phase-to-phase and three phase short circuit fault passage
and interruption due to operation of upstream device. OCID operates according to definite time TCC.
OCID settings are described in Table 27 and Table 28.
Table 27
– Radial line recloser OCID element settings
Settings Designation Range Step size Default
Operating mode Mode Enable/Disable n.a. Enable
Detection time, s Td 0.00
–100.00
0.01 0.1
Pickup current, A Ip 10
–6000
1 100
Reset time, s Tres 0.00
–100.00
0.01 0.1
Fault interruption reset time, s Tfir 0.10
–100.00
0.01 1.00
Table 28
– Ring line recloser OCID element settings
Settings Designation Range Step size Default
Operating mode+ Mode+ Enable/Disable n.a. Enable
Detection time+, s Td+ 0.00
–100.00
0.01 0.1
Pickup , A Ip+ 10
–6000
1 100
Reset time+, s Tres+ 0.00
–100.00
0.01 0.1
Fault interruption reset time+, s Tfir+ 0.10
–100.00
0.01 1.00
Operating mode- Mode- Enable/Disable n.a. Enable
Detection time-, s Td- 0.00
–100.00
0.01 0.1
Pickup current-, A Ip- 10
–6000
1 100
Reset time-, s Tres- 0.00
–100.00
0.01 0.1
Fault interruption reset time-, s Tfir- 0.10
–100.00
0.01 1.00
Earth Fault Interruption Detection (EFID)
This element is available for OCR mode “Sectionalizer” only.
This element provides detection of the earth fault current passage and interruption due to operation of
upstream device. EFID operates according to definite time TCC.
EFID settings are described in Table 29 and Table 30.
Table 29
– Radial line recloser EFID element settings
Settings Designation Range Step size Default
Operating mode Mode Enable/Disable n.a. Enable
Detection time, s Td 0.00
–100.00
0.01 0.1
Pickup current, A Ip 5
–6000
1 100
Reset time, s Tres 0.00
–100.00
0.01 0.1
Fault interruption reset time, s Tfir 0.10
–100.00
0.01 1.00