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Revision history – Basler Electric BE1-81O/U User Manual

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9137300990 Rev N

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Revision History

Table 4 provides a historical summary of the changes made to this instruction manual. Revisions are
listed in chronological order.

Table 4. Instruction Manual Revision History

Manual

Revision and Date

Change

E, Mar-93

Various relay changes were incorporated into the manual

F, Apr-98

Revised paragraph styles

Section 1: Changed frequency sensing limits to 30 and 80 Hz and
deleted paragraphs concerning revision levels. Modified power
supply ranges. Changed pickup accuracy from

±0.008 Hz to ±0.01

Hz. New statement was added to Isolation, added IEEE
qualification statement, added UL recognition, corrected M1 case
weight, and corrected Inverse Time Over/Underfrequency
Characteristic Curve diagrams
(Figures 1-2 and 1-3).

Section 3: Added wide-range power supply data and deleted
Figure 3-5.

Section 4: Extracted testing and adjustment information and
created new Section 5, Test and Adjustments. Incremented
remaining section numbers as required. Inserted additional
installation diagrams to cover all relay styles.

G, Jun-99

Revised style chart to reflect changes to the E1 and E2 timing
options

Changed dielectric test specification listed in Sections 1 and 4

Figures 2-3 and 3-3 were updated to show the three-position
Selector Switch S7

All case drawings were updated to show revised case covers

Definite time delay options test procedures (Section 5) were
modified to accommodate the new E1 and E2 timing options

H, Sep-03

Removed references to timing option D1

I

This revision letter not used

J, Oct-07

Added manual part number and revision to all footers

Updated power supply burden data in Section 1

Updated output contact ratings in Section 1

Updated front-panel drawings to show LED targets

Updated target description in Section 3

K, Sep-10

Updated time delay accuracy in Section 1

Updated GOST-R statement in Section 1

Updated rear case drawings in Section 4

Updated Storage statement in Section 4

L, Sep-11

Added Figures 4-3, 4-6, 4-7, 4-10, and 4-11 for S1 single-ended
case

Removed Figure 4-9 for M1 single-ended case

M, Feb-13

Updated case and cover drawings in Section 4

N, Jun-14

Corrected truncated boxes in Figure 1, Style Chart

BE1-81O/U

Revision History