Hitachi Relion 670 Series Commissioning Manual page 167

1MRK506371-UUS Rev. M
Document
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11.5.8.2 Checking the phase current trip value, Pickup_PH
The check of the Pickup_PH current level is best made in FunctionMode = Current and BuTripMode = 1
out of 3 or 2 out of 4.
1. Apply the fault condition, including BFI_3P of CCRBRF (50BF), with a current below set
Pickup_PH.
2. Repeat the fault condition and increase the current in steps until a trip occurs. Note that the
INITIATE signal shall be re-applied for each new current value.
3. Compare the result with the set Pickup_PH.
11.5.8.3 Checking the residual (ground fault) current trip value Pickup_N set below
Pickup_PH
Check the low set Pickup_N current where setting FunctionMode = Current and setting BuTripMode = 1
out of 4
1. Apply the fault condition, including BFI_3P of CCRBRF (50BF), with a current just below set
Pickup_N.
2. Repeat the fault condition and increase the current in steps until trip appears. Note that the
INITIATE signal shall be re-applied for each new current value.
3. Compare the result with the set Pickup_N.
4. Disconnect AC and BFI_3P input signals.
11.5.8.4 Checking the re-trip and back-up times
The check of the set times can be made in connection with the check of trip values above.
Choose the applicable function and trip mode, such as FunctionMode = Current and RetripMode =
UseFunctionMode.
1. Apply the fault condition, including initiation of CCRBRF (50BF), well above the set current value.
Measure time from BFI_3P of CCRBRF (50BF).
2. Check the re-trip t1 and back-up trip times t2 and t3.
In applicable cases, the back-up trip for multi-phase pickupt2MPh and back-up trip 2, t2 and t3 can
also be checked. To check t2MPh, a two-phase or three-phase initiation shall be applied.
3. Disconnect AC and BFI_3P input signals.
Line distance protection REL670
Commissioning manual
Product History
revision
2.2.4 -
2.2.5 -
2.2.6 -
If RetripMode = Off and FunctionMode = Current is set, only backup trip can be used to check
set Pickup_PH.
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Section 11
Testing functionality by secondary injection
M12104-23 v15
M12104-80 v11
M12104-93 v13
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