iv BE1-50/51B Introduction 9252000991 Rev N
D, 05/94
• Clarified TIME PICKUP and INST PICKUP specification ranges,
page 1-3.
• Changed Figure 1-2 to also show one ampere unit burden data.
• Changed time characteristics accuracy statement, page 1-6.
• Added (repeated) equation for the characteristic curve time
functions, page 1-8.
• Changed Figure 1-4 to show one ampere unit starting data.
• Separated Section 4, Installation, into Section 4, Installation, and
Section 5, Testing, and bumped all subsequent sections.
C, 06/93
• Added column for CT secondary to Table 1-1 and UL Recognition
and CSA Certification to specifications.
• Page 3-2: Deleted “or reset” from last sentence in paragraph
Outputs. Changed from “The targets will not operate or reset…” to
“The targets will not operate…”
• Page 4-1: Corrected dielectric test leakage current per terminal.
B, 09/92
• Page 1-1: Application, deleted reference to dust tight cover.
• Page 1-3: Specifications, TIME Dropout to not less than 95% of
pickup value.
• Page 1-6: Specifications, Time Reset, added statement to insure
sufficient power to power-up relay when using decaying
characteristic.
• Page 1-7: Specifications, corrected Storage Range Temperature
degrees F.
• Page 1-8: Defined British Standard curve types.
• Page 2-1: INST and TIME PICKUP selectors, added statement that
changing selectors while relay is in service may cause tripping.
• Page 4-4: Changed Figures 4-4 and 4-5.
• Page 4-6: Changed Figure 4-8.
• Page 4-9: Time Pickup Test, Step 1, changed 0.45 A to 0.485 A.
• Page 4-11: Time Pickup Test, Step 1, changed 0.09 A to 0.096 A.
• Page 4-13: Added paragraph SETTING THE RELAY.
• Added Section 6.
A, 05/92
• Changed manual title to BE1-50/51B and incorporated engineering
changes accordingly.
―, 04/92
• Initial release.
www . ElectricalPartManuals . com
To Next Page
Loading...
