Relays Sensitive Types Western Electric 260 and 261 Types KS

Relays Sensitive Types Western Electric 260 and 261 Types KS
.
BELL SYSTEM
Plant Series
PRACTICES
SECTION 040-254-701
Issue 9-D, September,
1963
AT&TCo Standard
RELAYS
SENSITIVE
WESTERN
ELECTRIC
TYPES
260 AND
261 TiPES
KS TYPES
WESTON
MODELS
30, 534, 546, 730,
BETHLEHEM
REQUIREMENTS
1.
AND
MODEL
AND
1026
ADJUSTING
PROCEDURES
essary for the proper
ments listed herein.
GENERAL
This section covers the requirements
and
adjusting
procedures
for sensitive-type
relays such as Western
Electric
260 and 261
types, KS types, Mreston Models 30, 534, 546, 730,
and 1091, and Bethlehem
Model 1026.
1091
application
of the require-
1.01
1.02
This section is reissued to revise
cedure for adjusting
the contact
the Bethlehem
Model 1026 relay.
the progaps on
1.03
Reference
shall
be made
to Section
020-010-711 covering general requirements
definitions
for additional
information
nec-
and
The sensitive-type
relays covered in this
section
are permanent
magnet
moving
coil-type precision relays and should be treated
as electrical indicating instruments.
These relays
are equipped with either one or two adjustable
contacts.
A change in current
(or voltage)
in
the moving coil winding from a predetermined
1.04
TERMINAL
STUDS
AND
MOUNTING
NuTS—
COVER
MOUNTING
SCREW
NAME
NAME
PLATE
MOUNTING
SCREW
L COVER
MOUNTING
SCREW
RELAY
L
Fig.
1-
Western
CONTACT
ASSEMBLY
AND
MAGNET
SCREW
Electric 260
Type
CONTACT
ASSEMBLY
Fig.
AND MAGNET
J
SCREW
2 - Western
@ American Telephone and Telegraph
Printed in U.S.A.
PO
UST
COVER
DUST
COVER
MOUNTING
SCREW
Electric 261
Type —
Front
View
Company, 1963
Page
1
SECTION
040-254-701
value causes the contact arm to move against a
contact but, when the current
(or voltage)
becomes normal again, the contact arm automatically returns to its normal position. Some relays
are provided with scale plates and the contact
arm is a pointer which indicates a change in current (or voltage) within the range of the relay.
A controlled
circuit
is a circuit which
functions
directly
through
the contacts
of the relay.
1.05
1.06
Rated values are the values of voltage or
current
given on the nameplate
of the
relay and are the values to which the relay is
adjusted
by the manufacturer.
Nominal values are the values of voltage
or current
shown in the circuit requirement table or in other job information
for the
particular
relay. In most cases, these values
agree with the rated values. In cases where nominal values have been specified which differ from
the rated values and the relay has been modified
to agree with the nominal values, these values
are usually stamped on the relay in red characters.
1.07
The nominal values specified in the circuit
requirement
table or on other job information give the range within which the voltage or
current is to be controlled.
For checking or adj usting purposes, a tolerance is permitted
which
is applied to each end of the range to determine
the limiting values. The tables in this section
cover the minimum
and maximum
values together with the tolerances
for each nominal and
rated value for relays which are not covered in
circuit requirement
tables. Western Electric 260type relays are covered in the tables in this section up to and including
the 260AL relay. To
obtain the tolerance for relays not covered in the
tables, apply the tolerance specified for a similar
relay listed which has high- and low-rated values
most nearly the same as those specified for the
relay being checked or adjusted.
1.09
1.10
The detailed procedures
for checking the
relays are based on using the KS-8039
volt-milliammeter,
which has a rated accuracy
of 1/4 of 1 per cent, although the general methods are applicable
to other equivalent
instruments.
When checking or adjusting
a relay with
the voltmeter,
it is recommended
that the
scale on the meter be selected so that the voltage
limit to be checked falls in the upper third of
the scale range. This will give the most accurate
adjustment
of the relay.
1.11
The tolerance is the permissible
variation
from the nominal or rated values at either
the top or bottom of the range.
1.08
(s)
CASE
TORSION
ADJUSTING
SPRING
DISC
-
::~&TING
DISC
CLAMPING
SPIRAL
SPRING
TORSION
T
\
I /-
\
co
~R IGHT
Contact
CONTACT
SCREW—
?:
Sc
(A
CONTACT
BLE
BE
BEARING
3-
Western
(earlier
screws)
Page
CONTACT,
ARM
co
Fig.
LEFT
2
SCREW
J
\
Electric 260 Type —
relays having
ADJUSTING
CLAMPING
MAGNET
Cover
DISC
SCREWS
>
-L(B,
ToRsIoN
ADJUST!
spRING
NG
DISC
Removed
contact screw clamping
Fig. 4-
Contact
Assembly
relays having
Models
(earlier
contact screw clamping
—
Weston
screws)
.
1SS 9-D,
SECTION
RELAY
MOUNTING
HOLE 1
TORSION
040-254-701
SPRING
“LAY
covERM~AOJu’T’NG
‘R?
NAME
LC
~c
PLATE1
LOW
MOUNTING
NAME
RELAY
PLATES
COVER—
SCREW
CONTACT
MC -1
1
NAME
Fig. 5-
Weston
L1
RELAY
COVER
Weston
~TORSION
d
Model
534
(flush
SPRING
mounting
case)
PLATE
Mode130
COVER
RELAY
Fig. 7-
~Mc
+
SCREW
MOUNTING
MOUNTING
cl
HOLE
H7
SCREW
d
77
G
0
Q
—
GLASS
COVER
CLAMPING
RING
Fig. 6-
Weston
Model
534 (surface
case)
\
-1
Fig. 8-
Weston
Model
GLASS
COVER
MOUNTING
SCREWS
546
Page
,
3
SECTION
040-254-701
2.
RELAY
COVER
CONTACT
CONTACT
SCREW
CLAMPING
SCREW
RELAY
MOUNTING
J
(sEE NOTE)
[
(A)
REQUIREMENTS
Mounting of Relay and Cover: The relay
and the relay cover shall be held securely
by their mounting
screws.
2.01
COVER
MOUNTING
[ SCREW
Gauge by feel.
2.02
Tightness
of Contact
Screw
Clamping
Screws
(Western
Electric
260 type and
Weston models) : Fig. 3(A), Fig. 4(A),
Fig.
9 (A), and 10 (A) — The contact screw clamping
screws shall be sufficiently tight to hold the contact screws in their adjusted
position.
Gauge by feel.
Tightness
of Adjusting
Disc Clamping
Screws
(Western
Electric
260 and 261
types and Weston models) : Fig. 2(A), 3 (B),
and 4 (B) — The adjusting
disc clamping screws
shall be sufficiently
tight to hold the torsion
spring adjusting
disc in its adjusted
position.
2.03
Fig.
9-Model
730
(flush
mounting
case) —
Gauge by feel.
Front View
r
COVER
SCREW
‘GRJWIMWDAND
FNJ%T)ARM
ZERO
Fig.
Page
4
10-
Model
730
(surface
case) —
Cover
ADJUSTER
Removed
—
MOUNTING
HOLE
~
Used
in Power
Plants
.
1SS 9-D,
TORSION
r-
CONTACT
SPRING
ADJUSTING
‘RM—\
I
r!;~R
J-
COVER
MOUNTING
SCREW -1
(SEE NOTE)
(A)
TORSION
SPRING
ADJUSTING
ARM CLAMPING
SCREWS
LspiRAL
SPRING
NOTE:
THECOVER
MOUNTING
THECOVER
TOTHE
WHICH
ARE
SCREWS
RELAY
PERMANENTLY
[
11 -Weston
case) —
I
TORSION
SPRING
I
RELAY
;:():7NG
TORSION
SPRING
ADJUSTING
ARM
MOUNTING
ATTACHED
-1
STUDS
TO
Fig.
12-Bethlehem
case) —
Model
COVER
FASTEN
THERELAYCASE.
Fig.
r
LsPIRAL
/
ToRsloN
040-254-701
SCREW
RELAY
I
‘i_&’i%TING
SECTION
Model
1026
(flush
mounting
Front View
1091 (flush mounting
Front View
in others by using the 35-type
in 3.05 through 3.07.
Tightness
of Torsion Spring
Adjusting
Arm Clamping
Screws
(Weston Model
1091) : Fig. 11 (A) — The torsion spring adjusting arm clamping
screws shall be sufficiently
tight to hold the torsion spring adjusting
arm
in its adjusted position.
test set as covered
2.04
Gauge by feel.
Freedom
of Pointer
Movement
(relays
having
scale
plates) : When
current
through the instrument
is gradually
decreased
or increased, the pointer shall follow this change
smoothly.
2.05
Gauge by eye.
To check this requirement,
it will be necessary
to vary the voltage. This may be done in some
cases by changing the load, in others by changing the float voltage of the charging
unit, and
Pointer
Setting
(relays having zero adjusters) : With a definite value of voltage
or current applied to the relay and to the standard instrument,
the pointer shall point to the
same scale reading on the relay as indicated by
the pointer on the standard
instrument.
For current relays, the pointer shall point to the same
scale reading on the relay as indicated
by the
pointer on the milliammeter
of the 35-type test
set.
2.06
To check this requirement,
unless
otherwise
specified in the circuit requirement
table or in
Table B, choose any convenient voltage or current value between the relay contacts as determined from the scale reading on the individual
relay.
Page
5
SECTION
040-254-701
Electrical
2.07
mum low limit, but shall make reliable
tact on the minimum low limit.
Requirements
(a)
General:
Llnless otherwise specified in the
circuit requirement
table or other job information,
the relay shall meet the accuracy
requirements
within the limits specified in the
tables in this section. (See 1.09. ) Relays not
listed in the tables shall meet the electrical
requirements
specified in the circuit requirement tables. The electrical requirements
shall
be met with the relay cover on.
(b) Regular
Current
Voltage Relags (Table
Relays (Table B)
A)
(2) High Voltage or Current:
The right
contact shall not make contact on the
minimum high limit, but shall make reliable
contact on the maximum high limit.
(c) Diflererztial
19.80
121.40
1376
1387
and
REGULAR
20.00
122.00
VOLTAGE
20.20
122.60
I
I
I
I 1938
1939
2139
i 2354
I 2454
2765
I
t
I 260NI
I
260A
260B
7023
7001
7002
I 2900
2909
2910
2911
2912
3015
7003
I
I
260D
260E
I
I
260G
I
I
Page
6
7004
7005
7006
7007
I
38.75 I
37.75
44.60
39.00
38.00
45.00
i
82.00 I
85.00
I
109.20 I 110.00
I 38.75 i 39.00
23.80
24.00
37.75
38.00
47.75
48.00
45.70
46.00
22.80
23.00
23.80
24.00
21.80
22.00
~2.50
22.30
21.00
132.00
I
39.25 i 40.25 I
38,.25
41.75
45.40
49.60
88.00
21.20
132.60
I
*0.20
&O.60
1
40.50 I 40.75 I
42.00
42.25
50.00
50.40
1
1
+0.25
&O.25
30.40
I
3116
3117
I 3118 I 23.30 I 23.50
3119 I 32.75
33.00
65.70
66.00
3120 ‘1
I 3121
I 125.30 I 126.00
126.30
127.00
3122
19.80
20.00
6036
6084
45.60
46.00
1
Rela~s
RELAYS
20.80
131.40
I
I
Voltage
(1) The relay shall not make contact with
either the left or the right contact on
the minimum
voltage
difference
limit between the two sources of supply, but shall
make reliable contact with either the left
or the right contact on the maximum
voltage difference limit.
(1) Low Voltage or Current:
The left contact shal 1 not make contact on the maxiTABLE A —
con-
1
I
110.80 I 119.20 ] 120.00 I 120.80
39.25 I 40.25 I 40.50 I 40.75
24.20
25.00
24.80
25.20
41.75
42.00
38.25
42.25
48.25
50.00
50.25
50.50
46.30
50.45
50.75
51.05
~4.~()
23.20
23.80
24.00
24.20
24.80
25.00
25.20
~2.80
22.20
23.00
23.20
22.70
23.30
23.50
23.70
23.70
24.30
24.50
24.70
33.25
34.75
35.00
35.25
66.30 I 69.70 I 70.00 ] 70.30
126.70
133.30
134.00
134.70
1~7.70 134.30
135.00
135.70
20.20” I 20.80 I 21.00 ] ~1.zo
I
I
I
I
46.40 I 51.60 I 52.00 I 52.40 I
1
I
I
I
&O.80
&O.25
ko.20
&O.25
& 0.25
*0.30
*0.20
20.20
&o.20
20.20
*0.20
&O.25
*0.30
*0.70
ko.70
*0.20
30.40
I
I
2
3
4
I
I
I
I
.
1SS 9-D,
TABLE A—
NONSHIELDED
SHIELDED
I
MIN
I
RATED
260+
260U
260W
7031
7032
7033
2(W%
—---
7034
----
,
, 138.(-)0
I
I 144.00 I 145.00
23.75
24.00
39.75
40.00
7.50
8.00
47.00
47.25
47.50
47.75
47.45
47.75
22.80
23.00
45.50
45.75
138.00
139.00
142.00
143.00
145.70
146.70
140.00
141.00
7010
6100
6190
6191
6192
6199
6200
6211
6227
260AC
7015
7016
7017
7018
7019
7020
7021
7022
260K
260L
260N
260)R
I
7024
7025
7027
7028
260S
I
7030
1 260AA
I 260AB
L
260AD
260AE
260AF
260AG
260AH
260AJ
260AK
260AL
6342
6350
(%6!5
--v6613
6615
6616
6796
6797
6798
6826
6855
6856
6871
6872
6969
7011
7012
7012
.= A7014
I
70:35
7036
7437
I
I
I
I
RELAYS
I
(cent)
HIGH-VOLTAGE
LIMITS (volts)
MAX
MIN
I 24.00 I 24.zo
23.00
23.20
24.40
24.60
26.70
26.90
60.00
60.50
38.00
38.25
39.00
39.25
86.00
86.60
50.50
50.70
53.50
53.70
44.00
44.50
45.00
45.50
2525
2545., ----, ---11.50 I 11.[ ;0
1I 45.30
~
45.60
;23.75
24.00
‘Jan
44.UU
44.4
“15
31.813
31.50
.nnn
(.WU
1 J..ZV
1mnni
23.50
23.75
60.00
60.70
65.00
65.50
46.25
46.55
131.00
132.00
21.00
21.22
22.75
23.00
86.00
86.60
47.00
47.25
I 23.25 I 23.45
21.75
21.95
24.75
25.00
47.75
48.00
125.00
125.90
I 23.80
22.80
24.20
26.50
59.50
37.75
38,75
85.40
50.30
53.30
43.50
44.50
2505
, ----11.40
: An
I 45.UU
23.50
43.55
31.17
~onl.
16.ou
23.25
59.30
64.50
45.95
130.00
20.78
22.50
85.40
46.75
I 23.05
I 21.55
5
24.50
47.50
124.10
I
VOLTAGE
LOW-VOLTAGE
LIMITS (volts)
KS NUMBER
WESTERN
ELECTRIC
CODE
REGULAR
I
RATED
I
MAX
I 25.05 I 25S5 I 25.45
24.2o
23.80
24.00
25.30
25.50
25.70
00 uu
An
27.60
27.8’n I &o.
I
I
65.50 I 66.;; I 66.50
41.75
42.25
42.00
40.50
40.75
40.25
93.40
94.00
94.60
52.30
52.50
52.70
55.40
55.60
55.80
49.75
50.75
50.25
49.75
50.25
50.75
2?6
7.625
--..-05
---26.45
12,550
12,60
12.40
50.45
50.75 I 51.05 I
26.75
27.00
-----..u26.50
1
,OtiI. AG
(MlI AG Aii 1I
.45.F~
r
---33.m
‘3.83
33.bu
33
17. 80
18.00
18.20 I
97 nn
50
26.7E
cc)
UO.30
69.0.
““., ”
67.50
68.00
68.50
----50.45
50.75 , 51.05
134.00
135.0~0 I 136.00
Al-1 “?.22
Li).uu
La
22.78 I 09
: Or
24.75
25.00
25.~a
I
KiA60 1
93.40
94.00
>n I AOOK I
48.75
49.OW
I ‘+a.Ld I
I 24,05 ] 24.25 I 24.45 I
24.55
24.75 1 24.95 I
cm nn
26,50
26.7E
50.00
50.2iJ
Gu
134.10
135.00
135.90
.””
...
..-
$ 26.
1=
1
139.00
-.”.
-—
040-254-701
SECTION
.“-
----
TOLERANCE
[volt)
*0.20
ZU.
LU
I
*0.50
?0.25
&O.25
&O.60
&().~()
50.20
*0.50
*0.50
&o.20
*O.1O
*0.30
+0.25
—----
1
3
4
+0 ..-A5
_.
I
1
I
I
i
1
*0.33
?0.20
-n 9K
I
I
I
_“., ”
*0.50
+0 20
til.oo
*0.22
,nnvL8
ZU.
I
I
I
+0 co
—.
.-.
I1
t
Jnoiz
zu.&.J
*0.20
50.20
-n
OK
I
I
1
I
J
*0.90
140.00
145.00
146.()()
147.00
&l.()()
146.00
24.25
40.25
8.50
47.50
48.00
48.05
23.20
46.00
140.00
144.00
147.70
142.00
151.20
27.75
41.25
12.00
54.00
50.50
52.20
25.80
50.75
161.00
155.00
159.00
156.00
152.20
28.00
41.50
12.50
54.25
50.75
52.50
26.00
51.00
162.00
156.00
160.00
157.00
153.20
28.25
41.75
13.00
54.50
51.00
52.80
26.20
21.00
?0.25
*0.25
*0.50
?0.25
&o.25
+0.30
ko.20
&O.25”
31.00
*1.00
til.oo
*1.00
51.25
163.00
157.00
161.00
158.00
SEE
NOTE
3
4
3
4
Page
7
SECTION
040-254-701
TABLE
B —CURRENT
LOW-CURRENT
LIMITS [amp)
KS NUMBER
NONSHIELDED
MIN
RELAYS
HIGH-CURRENT
LIMITS (amp)
NOMINAL
MAX
NOMINAL
MIN
TOLERANCE
lamp)
MAX
SEE
NOTE
2254
2803
5,6,8
0.0094
0.0095
0.0096
0.0104
0.0105
0.0106
*0.0001
6364
5,6
6459
5,6
7242
5,6
7719
5,6
7733
5,6
8007
13760
5,6
0.0003
Notes for Tables
0.0005
A and
0.0007
—
—
2.
The difference of potential
required between
the break of one contact and the make of the
other contact shall be minimum 0.75 volt.
3. For low-voltage
range,
ated with the relay.
close the key associ-
4. For high-voltage
range,
ated with the relay.
open the key associ-
5.
In cases where the electrical
values for this
relay cannot be measured with the voltage or
TABLE C —
6. Weston
7. Weston
case).
SHIELOED
Model
(volts)
(120 - 240)
I
260H
I
7008
I 3123
I
I
2GOJ
I
7009
I 3124
I (110/220
(34 - 68)
(45/90
- 130/260)
- 52/104)
730
relay
VOLTAGE
RELAYS
MIN
==Ed=
5.00
5.50
*0.50
I 1.50
1.70
1.90
?0.20
I 4.50
5.00
5.50
*0.50
1.80
2.00
4.50
2.20
1
Page
(flush-mounting
9. The pointer shall be adjusted
to indicate 1
on the scale plate when a current
of 1000
microampere
is applied to the terminals
of
the operating
coil of the relay.
DIFFERENTIAL
RANGE
2507
7026
Model 30 relay.
Vol
NONSHIELDED
7,9
8. No field readjustment
is recommended
for
the KS-2254 relay. If the relay fails to operate satisfactorily,
it should be replaced.
KS NUMBER
WESTERN
ELECTRIC
CODE
* 0.0002
current
instruments
available,
or where the
system in which the relay functions
does not
permit applying
the electrical
requirements
specified in the circuit requirement
table, the
relay shall be considered
defective if it does
not function
satisfactorily
under circuit operating conditions,
and it shall be replaced.
B
1. The left contact
shall not make contact
on the specified low-voltage value +0.1 volt,
but shall make reliable contact on the specified low-voltage
value. The right
contact
shall not make contact on the specified high
voltage
–0.1 volt, but shall make reliable
contact on the specified high-voltage
value.
—
*0.20
t
8
I
1SS 9-D,
3.
ADJUSTING
3.001
PROCEDURES
List of Tools and
CODE OR
SPEC NO.
Test Apparatus
DESCRIPTION
TOOLS
209
5/16-Inch
Hex. Open Single-End
Offset Wrench
417A
1/4- and 3/8-Inch
Hex.
Open Single-End
Wrench
KS-6367
7/16- and 5/8-Inch
Open
Double-End
Flat Wrench
KS-6854
3-1/2
R-1OO5
Jewelers
R-2262
5/32- and 7/32-Inch
End Flat Wrench
—
3-Inch
C Screwdriver
—
4-Inch
E Screwdriver
r—
Inch Screwdriver
Screwdriver
Open Double-
T-501 Voltmeter
Relay Wrench,
Bethlehem
Instrument
Co, Inc,
Bethlehem,
Pa
L
TEST APPARATUS
35 Type
Test Set
KS-8039
Weston Model 622 Volt-Milliammeter and Associated Connecting
Leads or Equivalent
Before making any adjustment
on the
relay, determine
that the trouble is not
with the connecting
circuits.
No adjustments,
other than those covered in this section, should
be made by the regular maintenance
forces. It is
assumed that all other adjustments
will be made
in a central
instrument
bureau, repair center,
or by authorized
instrument
repair personnel.
3.002
SECTION
040-254-701
iron, steel, magnetic
fields, and other relays.
The relay under test should be kept at least 18
inches away from the current or voltage measuring
instrument.
When possible,
adjust
the
Weston Model 30 relay in the location it occupies
when in use because of the magnetic
effect of
adjacent
apparaths
and framework.
and
the
Y$Then making
adjustments
cover has been removed, do not place the
relay where moving air currents
may cause the
pointer to deflect.
3.004
When adjusting
the relay, do not leave
the cover off longer than necessary
because of the possibility
of dust accumulating
on
the contacts and on the other parts of the relay
mechanism.
3.005
When readjusting,
the relay shall make
contact
as close as practicable
to the
specified voltage or current
limits as indicated
by the standard
voltmeter
or the milliammeter
of the test set.
3.006
Removing Covers:
To adjust
the relay
to meet its requirements,
it will be necessary to remove the relay cover as follows.
3.007
(1)
Western Electric 260 and 261 Types, and
Weston Models 30 and 534: Fig. 1, 2, 5, 6,
and 7 — Remove the cover mounting
screws
using the 4-inch E screwdriver
and remove the
cover. If the screws are sealed, break the seals.
In the case of the 261-type relay, also remove
the dust cover mounting
screws
with the
KS-6854 screwdriver
and remove
the dust
cover.
(2)
Weston Model 546:
Fig. 8 — Remove the
glass cover mounting
screws using the
KS-6854 screwdriver.
(3)
When making adjustments,
place the relay in the position corresponding
to that
which it occupies when in use in order to maintain the same relative position between the moving parts of the relay and the contact points.
Relays intended
for mounting
on steel panels
shall be adjusted
either
on their respective
panels or on steel panels of similar thickness.
Relays intended
for mounting
on nonmagnetic
panels shall be adjusted
in a place where they
will not be affected by outside influence such as
3.003
Weston Model 730 (flush-mounting
case) :
Fig. 9 — Remove the cover mounting
screws using the 3-inch C screwdriver
and remove the cover.
(4)
Weston
Model
730
(surface
case) :
Fig. 10 — Remove the cover mounting
screws using the R-1OO5 screwdriver
and remove the cover.
(5)
Weston Model 1091:
Fig. 11 — Remove
the cover mounting
screws
using
the
KS-6854 screwdriver
and remove the cover.
Page
9
I
SECTION
040-254-701
(6) Bethlehem
Model 1026: Fig. 12 — Remove the cover mounting screws using the
3-inch C screwdriver
and remove the cover.
Remounting
Covers:
relay, remount
the
3.008
After
relay
adjusting
the
cover as fol-
lows.
(1)
Weston Model 730 (surface case) : When
remounting
the cover, be uer~ careful
to see that the two projections
underneath
the zero adjuster
straddle
the torsion spring
adjusting
arm. No force should be used in
pressing home the cover, but the zero adjuster
screw should be turned until the projections
are in the proper
location
for assembly.
Tighten
the cover mounting
screws securely
using the R-1OO5 screwdriver.
(2) All Other Relays:
Replace the cover in
the reverse order of removal and tighten
the screws securely
using the proper screwdriver.
wrench. If the relay cover is not held securely
by the mounting
screws, tighten
the screws
using the R-1OO5 screwdriver.
(7)
Weston Model 1091: If the relay cover is
not held securely by the mounting screws,
tighten the screws using the KS-6854 screwdriver. If the relay is not held securely to the
mounting,
tighten
the mounting
nuts using
the 209 offset wrench.
(8) Bethlehem Model 1026: If the relay or the
relay cover is not held securely
by the
mounting screws, tighten the screws using the
3-inch C screwdriver.
Tightness
of Contact
Screws (Reqt 2.02)
3.02
Screw
(1) If the contact screw clamping
loose, tighten them as follow;.
(a)
Western
KS-6854
Electric
260 Type:
screwdriver.
Clamping
screws
are
Use the
(b)
3.01
Mounting
of Relay
and Cover
Weston Models Having Contact Screw
Clamping
Screws (except model 546) :
Use the R-1OO5 screwdriver.
(Reqt 2.01)
(1)
Weston Models 30 and 534: If the relay
or the relay cover is not held securely by
the mounting screws, tighten the screws using
the 4-inch E screwdriver.
Western Electric 260 and 261 Types and
Weston Model 546: If the relay is not
held securely
to the mounting,
tighten
the
mounting nuts using the KS-6367 wrench.
(c)
Weston Model 546: If the relay shielding
cover is not held securely by the mounting
screws, tighten
the screws using the 4-inch
E screwdriver.
Tighten the glass cover mounting screws using the KS-6854 screwdriver.
(5)
Weston Model 730 (flush-mounting
case) :
If the relay is not held securely by the
mounting
studs, tighten
the mounting
nuts
using the 417A wrench.
If the relay cover
is not held securely by the tiounting
screws,
tighten the screws using the 3-inch C screwdriver.
(6)
Weston Model 730 (surface case) : If the
relay is not held securely to the mounting, tighten the mounting nuts using the 417A
Page
10
Relay:
Use
the
All Relays:,
If the contact screws are
mounted
in slotted
brackets
and the
screws are loose, the relay should be replaced.
3.03
(3)
(4)
546
(d)
(2)
Western Electric 260 and 261 Types:
If
the relay cover is not held securely
by
the mounting
screws, tighten the screws using
the 4-inch E screwdriver.
Weston
Model
R-2262 wrench.
Tightness
of Adjusting
Screws (Reqt 2.03)
Disc
Clamping
(1)
Tighten
the adjusting
disc clamping
screws using the KS-6854 screwdriver
for
Western Electric 260- and 261-type relays and
the R-1OO5 screwdriver
for Weston model relays which are provided with adjusting
discs.
3.04
Tightness
of Torsion
Arm Clamping Screws
Spring
Adjusting
(Reqt 2.04)
(1) Tighten the torsion spring adjusting
arm
clamping screws using the R-1OO5 screwdriver.
3.05
3.06
[ 3.07
Freedom of Pointer Movement (Reqt 2.05)
Pointer Setting
(Reqt 2.06)
Electrical
Requirements
(Reqt 2.07)
General
(1)
Relays
should
failing to meet
be replaced.
the requirements
1SS 9-D,
Regular
Voltage
Relays
Preparation:
To check whether the relay
meets the requirements,
use the 35-type
test set and the KS-8039 volt-milliammeter.
(2)
(3) Open the circuit through the relay windings by removing the fuses or by opening
the switches associated with the relay. Do not
disturb the connections
from the contacts of
the relay to the controlled circuit.
(4) 35-Tgpe Test Set Application:
Depending
upon circuit conditions, connect the relay
to the test set using either B/V or G/V application as covered in Section 100-101-101. In
these applications,
when using the 35D or 35F
test set, the VM key should be normal with the
external voltmeter
connected across the winding terminals
of the relay.
(5) Determine the voltage at which the relay
is to be checked. Follow the information
specified in Table A and, for relays not listed
in the table, follow the information
covered
in the circuit requirement
table.
(6) Turn the VOLTS switch on the standard
instrument
to the scale position so that
the relay checking voltage is in the upper two
thirds of the scale.
(7) Caution:
[f a potential
greater than 60
volts is used, take care not to touch the
metal portions of the rheostat while using the
test set.
SECTION
040-254-701
ing mechanism
may be seriously
damaged.
In making
this adjustment,
observe that
there is considerable
slack motion in the
zero adjuster
screw. When the position of
the pointer has been changed, back off the
screw slight~
before the final check.
(a)
Weston
Model
730
(flush-mounting
case) : Remove the relay cover to gain
access to the zero adjuster
screw (3.007).
Turn the screw using the R-1OO5 screwdriver
until the requirement
is met. Remount the
cover (3.008).
(b)
Weston
Model
730 (surface
case) :
Turn the zero adjuster
screw using the
R-1OO5 screwdriver
until the requirement
is
met.
(10) Accuracy:
Adjust the sliders of the test
set, as required, until the lower limit of
the specified low voltage is indicated
on the
standard
voltmeter.
The left contacts should
make as indicated
by the functioning
of the
controlled
circuit.
(11)
Increase the applied voltage towards the
upper limit of the specified low voltage
by adjusting
the sliders so as to decrease the
resistance
in the circuit. Observe whether
or
not the controlled
circuit functions just before
or just as the upper limit of the specified low
voltage is reached.
(8) Freedom
of Pointer
Movement
(relays
having scale plates) : Adjust the sliders
of the test set, as required, until the standard
instrument
indicates
a value slightly
higher
than the starting
value as covered in (5).
Gradually
decrease and then increase the current through the relay using the sliders, as required, and check that the requirement
is met.
Then adjust the sliders of the test set
until the lower limit of the specified high
voltage
is reached.
The controlled
circuit
should not function until just after this limit
is reached but it should function
before or
when the upper limit of the specified high voltage is reached.
(9) Pointer
Adjustment
(relays having zero
adjusters)
: Adjust the sliders of the test
set, as required, until the standard
instrument
indicates
a voltage value between the relay
contacts as determined
from the scale of the
relay under test, unless otherwise specified in
the circuit requirement
table. Then proceed as
follows.
(13) Example:
Assume
that
the specified
range of a voltage alarm relay is 22 to
23 volts with a tolerance of ? 0.2 volt for each
of these values. The left contacts shall make,
as indicated by the alarm, on a low voltage of
minimum 21.8 volts or a voltage less than 22.2
volts. The right contacts shall make on a high
voltage of maximum
23.2 volts or a voltage
more than 22.8 volts. Neither of the alarms
shall be given when the applied voltage is at
or between 22.2 and 22.8 volts.
Caution:
The zero adjuster
screw should
turn freelg. Do not attempt
to turn the
screw after resistance is met, as the adjust-
(12)
Page
11
SECTION
(14)
040-254-701
If the relay
torily, make
as required.
does not function
satisfacthe following
adjustments
Adjust the contact
(a) All Relays:
as covered in (15) and (17).
(b) All Relays Except
Adjust the tension
as covered in (16).
gaps
Weston Model 730:
of the torsion spring
(15)
~
~
If the relay functions
satisfactorily
on
one side and not on the other side, it is
an indication
that the contact gap on the latter side is not satisfactory.
In this case, proceed as follows. Where the relay is equipped
with contact
screw clamping
screws, loosen
the contact screw clamping
screw associated
with the contact that failed. Use the KS-6854
screwdriver
for Western Electric 260-type relays, the R-2262 wrench for Weston Model
546, and the R-1OO5 screwdriver
for other
Weston relays having contact screw clamping
screws. Turn the contact screw in (clockwise)
or out (counterclockwise)
using the KS-6854
screwdriver
or the R-2262 wrench, as required,
until it just makes contact with the contact
on the contact arm as indicated
by the functioning of the controlled circuit when the voltage is within the specified limits. Then tighten
the clamping screw. For Western Electric and
Weston relays not equipped with contact screw
clamping screws, use the KS-6854 screwdriver
or the R-2262 wrench, as required, to turn the
contact screw in or out. For the Bethlehem
Model 1026 relay, use the T-501 wrench to
turn the contact screw. Make all checks for
operation with the screwdriver
and the wrench
removed because of the magnetic effect on the
relay.
(16)
If the controlled
circuit functions
for
low voltage on a voltage less than the
lower limit of the specified low voltage (makes
too late) and for high voltage on a voltage
less than the lower limit of the specified high
voltage (makes too soon), it is an indication
that the tension of the torsion spring is too
weak. For the example in (13), voltages
of
21.7 and 22.7 volts, respectively.
To change
the tension of the torsion spring, proceed as
follows.
(a)
Weston Models and Western
Electric
260 and 261 Types Equipped With TorLoosen the
sion Spring Adjusting
Discs:
Page
adjusting
disc clamping
screw or screws,
using the R-1OO5 screwdriver
for Weston
relays
and the KS-6854 screwdriver
for
Western Electric 260- and 261-type relays,
while holding the disc in position with the
thumb and forefinger.
Turn the disc to the
left
(counterclockwise)
to increase
the
spring tension or to the right (clockwise) to
decrease the spring tension. After the adj ustments
have been made and the controlled
circuit
functions
for low voltage,
make sure that the adjusting
disc clamping
screws are tight.
(b)
Weston Models
(except
model 1091)
and Bethlehem
Model 1026 Equipped
With Torsion Spring ~djusting Arms: With
the thumb and forefinger,
carefully
shift
the torsion spring adjusting
arm to the left
(counterclockwise)
to increase
the spring
tension or to the right (clockwise)
to decrease the spring tension.
(c)
Weston Model 1091: Loosen the torsion
spring adjusting
arm clamping screws,
using the R-1OO5 screwdriver,
while holding
the torsion spring adjusting
arm in position
with the thumb and forefinger.
Proceed as
covered in (b) to change the spring tension.
After the adjustments
have been made and
the controlled circuit functions for low voltage, make sure that the clamping
screws
are tight.
(17)
If the controlled
circuit functions
for
low voltage on a voltage higher than the
upper limit of the specified low voltage (makes
too soon) and for high voltage on a voltage
less than the lower limit of the specified high
voltage
(makes too soon), both contacts
are
out of adjustment.
In this case, adjust
the
sliders of the test set, as required, until a voltage midway between the specified high and
low voltage is indicated on the standard
voltmeter. Back off the contact screws until there
is approximately
equal clearance between the
contacts on the contact arm and both the right
and the left contacts.
Then proceed with the
readjustments
as covered in (15) and (16).
(18)
After making the readjustments,
check
the relay with the cover on for proper
functioning
on the high and low voltage limits
as covered in (10) through
(12) and, if necessary,
refine the adjustments
as covered
in (14) through
(17).
12
I
.
1SS 9-D,
(19)
After completing
the necessary
adjustments, remove all test connections
and
connect all wires that were disconnected.
Replace all fuses and close all switches associated with the relay.
Current
(20)
Relays
Proceed
in (2) and
(22)
Determine the current at which the relay
is to be checked. Follow the information
specified in Table B. For relays not listed in
the table, f ol low the information
covered in
the circuit requirement
table.
(23)
Freedom
of Pointer
having scale plates)
Movement
(relays
(a)
Operate and hold the MIL-AMPS
key
of the test set to select the appropriate
current range of the relay.
(b) Gradually
decrease and then increase
the current through the relay using the
sliders of the test set as required.
Observe
the milliammeter
of the test set to see that
the requirement
is met. Release the MILAMPS key.
(24)
Pointer Adjustment
(relays having zero
adjusters)
:
Proceed
as covered
in
(23) (a). Adjust
the sliders of the test set,
as required, until the milliammeter
of the test
set indicates a current value between the relay
contacts determined
from the scale of the relay under test, unless otherwise
specified in
Table B or in the circuit requirement
table.
Then proceed as covered in (9) (a) or (9) (b).
Release the MIL-AMPS
key.
The zero adjuster
screw should
Caution:
turn freelg. Do not attempt
to turn the
screw after resistance is met, as the adjusting mechanism
mug be seriously damaged.
Zn making
this adjustment,
observe that
there is considerable
slack motion in the
zero adjuster
screw. When the position of
the pointer has been changed, back off the
screw slightly before the final check.
(25)
that
If it is n;cessary
to make any adjustments, proceed in a manner
similar to
covered in (14) through
(18).
(27)
Proceed
(3).
(21 ) 35-Tgpe Test Set Application:
Depending upon circuit conditions,
connect the
relay to the test set using either BATT or GRD
application
as covered in Section 100-101-101.
Accuracy:
Operate and hold the MIL
AMPS key to select the appropriate
current range of the relay while varying the cur-
040-254-701
rent within the specified limits in a manner
similar to that covered in (10) through
(12).
Observe
the milliammeter
of the test set
to determine
whether
or not the controlled
circuit functions
within the specified current
limits.
(26)
as covered
SECTION
Differential
as covered
Voltage
in (19).
Relays
(28)
Proceed as covered in (2) through
(4).
Do not disturb
the connection
to the
N terminal
of the relay
windings.
Determine the voltage at which the relay is to be
checked. Follow the information
specified in
Table C and, for relays not listed in the table,
follow the information
covered in the circuit
requirement
table. Then proceed as covered
in (6) and (7).
Note:
Voltage relays which are not selfcontained use an external resistor to extend
the voltage range. In such cases, connect the
standard
voltmeter to the relay through the
resistor.
(29)
Adjust
the sliders of the test set, as
required,
to vary the voltage
across
one winding of the relay and observe whether
the controlled
circuit functions
when the unbalance voltage is within the specified limits.
In the same manner, check the other winding
of the relay for proper functioning
when the
unbalance voltage is within the specified limits.
(30)
If the relay does not operate
satisfactorily, adjust the contact gaps as covered
in (15) and (17) or the tension of the torsion
spring as covered in (16).
(31)
After
making
the adjustments,
check
the relay with the cover on for proper
functioning
as covered in (29) and, if necessary,
refine the adjustments
as covered
in (30).
(32)
Relays
Proceed
as covered
Used in Carrier
in (19).
Pilot Channel
Alarm
Circuit
(33)
After checking the relay in accordance
with the requirements
specified in the
circuit requirement
table and it is found nec-
Page
13
SECTION
040-254-701
essary
lows.
(34)
to make
adjustments,
If necessary, adjust
covered in (15).
proceed
the contact
as folgaps as
Assume
that
the specified
Example:
range of the relay is 1.5 db on either
side of the normal level with a tolerance
of
YO.2 db for the low level point and *0.2
db
for the high Ievel point. On the low level side,
the contacts should make when the variation
from normal level is between 1.3 db and 1.7
db low. On the high level side, the contacts
should make when the variation
from normal
level is between 1.3 db and 1.7 db high. Neither
contact should be made when the variation
from normal level is between 1.3 db low and
1.3 db high.
(35)
(36)
If the relay makes too late for the low
level side or makes too soon for the high
level side, adjust
the tension of the torsion
spring as covered in (16). For example
in
(35), a variation
from normal level of more
than 1.7 db low for the low side and a variation from normal level of less than 1.3 db high
for the high side, respectively.
(37)
If the pointer of the pilot indicator meter
does not hold to a steady indication
and
accurate adjustment
is hindered thereby, sup-
Page 14
14 Pages
ply the pilot indicator with current
frequency from a local oscillator.
at the pilot
(38)
In some cases where the relay used prior
to the KS-6364 relay is being checked
and readjusted
and it is found that sufficient
separation
between the contacts cannot be obtained, it will be necessary to connect a resistance (about
1000 ohms should be satisfactory) across the moving coil of the relay.
(39)
If the relay makes too soon for the low
level side and makes too soon for the
high level side, both contacts are out of adjustment. For example in (35), a variation
from
normal level of less than 1.3 db low for the
low side and a variation from normal level of
less than 1.3 db high for the high side, respectively. In this case, adjust
the circuit until
the normal
level is indicated.
Back off the
contact screws in the manner covered in (17).
Then proceed with the readjustments
as covered in (15) and (16) {a).
(40)
After making the readjustments,
check
the relay with the cover on for proper
functioning
on the high and low db limits as
covered in (10) through
(12) and, if necessary, refine the adjustments
as covered in (34)
and (36) through
(39).
(41)
Proceed
as covered
in (19).
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising