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.
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