Basler Electric BE1-BPR - Manual (Page 163)

9272000990 Rev J BE1-BPR Maintenance 9-1
SECTION 9 • MAINTENANCE
GENERAL
BE1-BPR relays are fully numeric and require no calibration at the circuit board level.
The design of the relay allows it to be fully drawn out of the case. The current transformer input circuits
are automatically shorted by the case when the relay is removed. All critical components are contained in
the draw-out assembly; suppression capacitors are the only electrical components located in the case
assembly. When removing the draw-out assembly from the case, care should be taken to prevent
electrostatic discharge and mechanical damage.
There is no need to disturb the circuit interconnections within the draw-out assembly. Repair of the draw-
out assembly by replacement of individual circuit boards is not recommended. The printed circuit boards
are constructed using surface-mount technology and are not designed to be field serviceable.
Should the relay require service, the draw-out assembly should be returned to the factory for repair.
Contact the Power Systems Group of Basler Electric at 618/654-2341 for a return authorization number
prior to shipping.
Depending on the criticality of the application, and the redundancy of the protection system, a draw-out
assembly from a spare BE1-BPR relay can be inserted into the mounted and wired case assembly to
restore protection. The relay requiring service can then be returned to the factory in the case from the
spare relay. If a spare relay case is not available, care should be taken in packing the draw-out assembly
for shipment. The packing material should be anti-static and prevent mechanical damage during transit.
STORAGE
This protective relay contains aluminum electrolytic capacitors, which generally have a life expectancy in
excess of 10 years at storage temperatures less than 40°C. Typically, the life expectancy of the capacitor
is cut in half for every 10°C rise in temperature. Storage life can be extended if, at one-year intervals,
power is applied to the relay for a period of thirty minutes.
CAUTION
Substitution of printed circuit boards or individual components does not
guarantee that the relay will operate properly. Always test the relay before
placing it in operation.