3-5-2 Reclosers and Sectionalizers Flashcards
A recloser is most often set to trip out at __?__ times its rating.
2
The part of a recloser that senses a fault is the __?__.
solenoid coil
A hydraulic recloser cannot interrupt nominal load current.
False
The acronym SCADA stands for __?__ and data acquisition.
Supervisory Control
The recloser which has a cold-load pickup feature is the __?__ recloser.
electronic
The electronic recloser can be closed manually if it does not have a low voltage supply.
False
Sectionalizers are not designed to interrupt __?__.
fault current
Sectionalizers normally have a non-reclose handle which can be used as a safety device when working in the area the sectionalizer protects.
False
Type H reclosers contain coils that vary in size from 5 to __?__ amps.
50
On type H reclosers, the fastest curve is the __?__ curve.
A
The two types of faults that will cause a recloser to operate are temporary and permanent.
True
The type L reclosers vary in size from __?__ to __?__ amps.
25 to 280
Most utilities and operating companies have standards of operation for their reclosers, setting them at __?__ fast operations and __?__ slow operations.
two, two
Single-phase reclosers are of the __?__ and __?__ -type.
H / L
A single-phase recloser rated at 14.4kV can be operated on an electrical system up to that voltage without making any electrical adjustments.
True
In order for a single-phase recloser to be set to operate only once instead going through its normal operating cycle, the non-reclosing handle must be __?__.
in the down position
The recloser mechanism on a type H or L recloser is attached to the __?__ of the unit.
top
The coil on type H or L reclosers is fixed by the manufacturer and cannot be changed out.
False
Type D reclosers vary in size from __?__ to __?__ amps.
100 to 560
A type D recloser rated at 14.4kV can be used at any voltage up to that rating.
False
The type of single-phase recloser that requires a closing coil to close its main contact is the __?__ recloser.
D
When a fault occurs on a line protected by a type __?__ recloser, the slow operations allow current to flow for 5 or 6 cycles in order to allow a fuse downstream of the recloser to open.
H
The reclosing time for all types of reclosers is the same.
False
A sectionalizer locks open during the interval when the back-up device is __?__.
open
