GE L60, Instruction Manual, Page: 145 / 498

GE Multilin L60 Line Phase Comparison Relay 5-53
5 SETTINGS 5.3 SYSTEM SETUP
5
d) EXAMPLE
A composite curve can be created from the GE_111 standard with MRT = 200 ms and HCT initially disabled and then
enabled at 8 times pickup with an operating time of 30 ms. At approximately 4 times pickup, the curve operating time is
equal to the MRT and from then onwards the operating time remains at 200 ms (see below).
Figure 5–15: COMPOSITE RECLOSER CURVE WITH HCT DISABLED
With the HCT feature enabled, the operating time reduces to 30 ms for pickup multiples exceeding 8 times pickup.
Figure 5–16: COMPOSITE RECLOSER CURVE WITH HCT ENABLED
Configuring a composite curve with an increase in operating time at increased pickup multiples is not allowed. If this
is attempted, the EnerVista UR Setup software generates an error message and discards the proposed changes.
e) STANDARD RECLOSER CURVES
The standard Recloser curves available for the L60 are displayed in the following graphs.
842719A1.CDR
842720A1.CDR
NOTE