ML20070S250
| ML20070S250 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 01/30/1983 |
| From: | Ballweg T, Jackie Cook, Hughes E BECHTEL GROUP, INC., CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 20680, 81-01-10, 81-1-10, NUDOCS 8302040329 | |
| Download: ML20070S250 (17) | |
Text
,
Consumers power Jernes W Cook O
f Vice President - Projects, Engineering and Construction General Offices: 1945 West Parnell Road, Jackson, MI 49201 + (511) 788-0453 January 30, 1983 81-01 #10 Mr J G Keppler, Regional Administrator US Nuclear Regulatory Commission Regions III 799 Roosevolt Road
'.~
Glen Ellyn, I5'Tici37 ---
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MIDLAND NUCLEAR C0 GENERATION PLANT DOCKET NOS 50-329 AND 50-330 UNDERRATED TERMINAL STRIPS ON LIMITORQUE VALVE OPERATORS File:
0.4.9.47 Serial:
20680
Reference:
J W Cook letters to J G Keppler, same subject:
- 1) Serial 11190, dated February 13, 1981 2)
Serial 11976, dated April 24, 1981
- 3) Su-ial 12041, dated July 8,1981
- 4) Serial 13665, dated September 11, 1981
- 5) Serial 14617, dated November 20, 1981
- 6) Serial 14690, dated February 12, 1982
- 7) Serial 17503, dated June 4, 1982 8)
Serial 17565, dated August 6, 1982 9)
Serial 19070, dated October 22, 1982 This letter, as were the referenced letters, is an interim 50.55(e) ceport concerning the terminal strip voltage ratings on Limitorque valve operators. provides a status of the corrective actions in progress to resolve this problem.
Another report, either interim or final, will be sent on or before March 16, 1983.
AAstA? Q)-
WEB /lr
Attachment:
- 1) MCAR 46, Interim Repo~t #10, " Qualification Cencerns for Various Components on Limitorque Valve Operators," dated December 10, 1982 8302040329 830103 DR ADOCK 050003
((g 2 lg83 OC0183-0051A-MP01
,EN) l
i 2
CC: Document Control Desk, NRC Washington, DC RJCook, NRC Resident Inspector Midland Nuclear Plant CBechhoefer, ASLB Panel RSDecker, ASLB Panel FPCowan, ASLB Panel AS&L Appeal Panel MMCherry, Esq MSinclair BStaniris CRStephens, USNRC WDPaton, Esq, USNRC FJKelley, Esq. Attorney General SHFreeman, Esq. Asst Attorney General W11 Marshall GJMerritt, Esq. TNK&J OC0183-0051A-MP01 Serial 20680 A
81-01
" g [ g g bechtel Associates Professional Corporation
- 10 U97832
SUBJECT:
MCAR 46 (issued 1/15/81)
Qualification Concerns for Various Components on Limitorque Valve Operators INTERIM REPORT 10 DATE:
December 10, 1982 PROJECT:
Consumers Power Company Midland Plant Units 1 and 2 Bechtel Job 7220 Description of Deficiency The following deficiencies are covered by MCAR 46:
a)
The use of underrated terminal blocks in I ?mitorque operators b)
The use of terminal blocks without proper environmental qualification in Limitorque operators c)
Additional concerns regarding qualification of various Limitorque operator components These concerns are detailed below.
A.
Underrated Terminal Blocks While replacing a damaged terminal block on a Limitorque operator, Bechtel determined that some of the terminal blocks used for the termination of the leads from the 460 V motor were rated less than 460 V.
These Limitorque operators, when used on safety-related valves, must function on an emergency core cooling l
l actuation signal (ECCAS).
In addition to being a personnel safety hazard, the potential exists for a short circuit /flashover, which could render the valves inoperative.
l B.
Environmental Qualification 1
l During random inspection for underrated terminal blocks, it was discovered that in some cases terminal blocks frou manufacturers not covered by existing qualification reports were used.
Limitorque provided the following information on environmental qualification of terminal blocks in its July 31, 1981, letter.
l 1268e
097629 Bechtel Associates Professional Corporation MCAR 46 32 Interim Report 10 Date Page 2 The Buchanan 0524 has been qualified by analysis. To supplement the qualification by analysis. Limitorque is currently running a type test on the Buchanan 0524 terminal block. The Buchanan 0824 terminal blocks are not qualified and must be replaced.
Some of the Limitorque operators having Buchanan 0824 type terminal blocks have been used on safety-related valves located inside containment. These operators must function on an ECCAS.
The potential exists for a terminal block to fail dur!ng its intended service life because of aging and radiation effects, which would render the valve inoperable and prevent proper operation of the safety-related system.
C.
Additional Qualification Concerns During June 1982, a randcm inspection was made of safety-related Limitorque valve operators supplied through various valve manufacturers and installed inside the reactor building. Thi s inspection resulted in various potential concerns regarding qualification of these Limitorque operators.
Summary of Investigation and Historical Background A.
Underrated Terminal Blocks 1.
The manufacturer's name was the only form of identification
[
found on a damaged terminal block. To order a replacement l
for the damaged terminal block, it was therefore necessary to measure the block's critical dimensions and compare them with those for blocks listed in Marathon Catalog 10M79.
This comparison indicated that the tetuinal blocks used for the termination of the leads from the 460 V motor could have l
been rated less than 460 V.
Eighteen Limitorque operators i
on Bechtel Purchase Order (P.O.) 7220-M-132-AC were I
inspected and eight were found to have underrated terminal blocks (Marathon 100 Series and Cinch Jones 140 Series).
Thus, Bechtel determined that some terminal blocks in Limitorque valve operators may be underrated for their intended function. The other ten operators inspected had Marathon 300 Series terminal blocks which are correctly rated for the intended service. Purchase Order 7220-M-132 is with Henry Pratt Company for the supply of nuclear service butterfly valves.
1268e
b97629 Bechtel Associates Professional Corporation MCAR 46 Interim Report 10 Date Page 3 2.
Representatives from Limitorque and Henry Pratt visited the Midland jobsite on January 31, 1981. After inspecting the terminal blocks, they confirmed the results of Bechtel's investigation.
3.
Random inspection was performed by Limitorque during the week of May 11, 1981, to establish the nagnitude of the presence of the underrated terminal blocks in the Limitorque operators. Limitorque provided Bechtel with detailed reports of its inspection. After review of the inspection reports, Bechtel determined that underrated terminal blocks were not used on any Q-listed purchase orders except P.O. 7220-M-132(Q).
4.
Seven different types of terminal blocks were identified (Buchanan 0222, 0524, and 0824; Marathon 300 Series; Beau 7600; Kulka 622; and General Electric EB-5) during the random inspection referred to in Item 3 above. All seven types are acceptable for 460 V service.
5.
Arrangements were immediately made by Bechtel to inspect any unshipped valves upon receipt at the Midland jobsite for underrated terminal blocks.
Inspection results are tabulated in Item B.7 below.
6.
Limitorque/ Henry Pratt submitted the terminal block replacement procedure and Certificate of Compliance for the terminal blocks which Bechtel project engineering approved upon review. The actual replacement of all underrated terminal blocks on Limitorque's Purchase Order 7220-M-132(Q) was undertaken by Bechtel construction personnel under the supervision of Limitorque service engineering during the second week of June 1982. The replacement work is now complete; all operators on P.O. 7220-M-132(Q) were inspected.
7.
Bechtel has received the inspection / replacement report from Limitorque for the work described in Item A.6 above.
8.
Limitorque's letter dated June 25, 1981 (Ref: MCAR 46, Interim Report 4, Item A.1) states that terminal block types Buchanan 0524 and Beau 7600 were previously rated for 600 V service using the breakdown voltage method of rating. A concern was raised because no documents are currently available at Bechtel to support this statement. Limitorque 1268e
097629 Bechtel Associates Professional Corporation 097832 MCAR 46 Interim Report 10 Date Page 4 has now provided additional documentation showing that the terminal blocks in question were previously rated at 750 V and 600 V, respectively.
B.
Environmental Qualification 1.
During the random inspection of underrated terminal blocks, referred to in Item A.3 above, Buchanan 0824 terminal blocks were found on three Limitorque operators purchased from Westinghouse on P.O. 7220-M-123A for nuclear service stainless steel valves.
Voltage rating data submitted by Limitorque for these terminal blocks were found acceptable.
However, these terminal blocks ;re unacceptable because of Limitorque's previously cited finding that these blocks "are not" environmentally qualified and "must be replaced."
2.
According to Limitorque, the use of unqualified terminal block type Buchanan 0824 is limited to P.O. 7220-M-123A(Q)-AC with Westinghouse Electric, based on Westinghouse's specific requirements. These blocks are not qualified and would require replacement with properly qualified terminal blocks. Based on random inspection results, it was concluded that Buchanan 0824 terminal blocks are not used on any other P.O.
3.
Of the seven terminal blocks listed in Item A.4 above, Limitorque stated that terminal blocks types Buchanan 0222, Buchanan 0524, Curtis Type L, Marathon 300 Series, and General Electric EB-5 were environmentally qualified for inside containment, but were unable to provide the required qualification documentation.
4 Limitorque presently has no specific plans for an environmental testing of the remaining terminal block types Kulka 672 and Beau 7600 for outside containment use.
l S.
Environmental qualification documentation for terminal block l
types specified in Items B.3 and B.4 above was returned to l
Limitorque with comments. Limitorque has resubmitted the l
documentation incorporating Bechtel comments. Bechtel is l
currently reviewing this document.
Currently, the l
acceptability of all terminal block types remains l
indeterminate pending acceptance of qualification I
documentation.
l l
l 1268e 1
0 9 7 6 2 9Bechtel Associates Professional Corporation D97832 MCAR 46 Interim Report 10 Date Page 5 6.
Bechtel field engineering has generated Nonconformance Report (NCR) 3780 against valves 2MO-1111, 2M0-1101B, and 2M0-1120B purchased from Westinghouse Electric on P.O. 7220-M-123A(Q)-AC, Items 4.2, 5.4, and 5.8, respectively. This NCR was initiated at the request of project engineering because of the presence of an unquelified terminal block, Buchanan 0824 7.
The following 18 operators were to be inspected upon receipt from the vendors at the jobsite for the presence of nonconforming terminal blocks. The status is ta follows:
Terminal Block (TB)/
P.O. Number Item (Quantity)
Remarks 7220-J-255A(Q) 23(8)
TB Kulka 622 7220-M-117(Q) 5.1(1)'
Valves converted to 7220-M-117(Q) 5.2(1) manual; effort still 7220-M-117(Q) 5.3(1) #
under way to locate 7220-M-117(Q) 5.4(1) and inspect operators 7220-M-168(Q) 1.5(1)
TB Buchanan 0222 7220-M-398(Q) 1.1(1)
TB Kulka 622 7220-M-398(Q) 1.2(1)
TB Kulka 622 7220-M-398(Q) 3.1(1)
TB Kulka 622 7220-M-398(Q) 3.2(1)
TB Kulka 622.
7220-M-398(Q) 3.3(1)
TB Kulka 622 All operators listed above are located outside containment.
The terminal blocks' voltage ratings are acceptable.
However, environmental acceptability is pending review and acceptability of the Limitorque qualification documentation described in Item B.5 above.
C.
Additional Qualification Concerns 1.
The motor nameplate ambient temperature rating on various motors installed on some Limitorque operators is 40C.
Limitorque has verbally stated that the Class B insulation motors rated for a 40C ambient temperature have not undergone qualification testing in accordance wich IEEE Std 382-1972 for the specified normal, accident, and post accident environment. Class H insulation motors are rated for 50C ambient temperature, but the qualification testing in accordance with IEEE Std 382-1972 for these motors is presently unknown.
1268e
097629 Bechtel Associates Professional Corporation 097832 MCAR 46 Interim Report 10 Date Page 6 2
No identification was evident on certain materials internal l
to the Limitorque operators (e.g., wiring, insulation, etc).
It is not presently known whether these types are qualified for the service conditions.
3.
Various orientations of installed operators were observed.
l It is not presently known whether the operators are qualified for all installed orientations.
4 Drain plugs on operators were observed to be both'in place l
and removed. Orientation of the operators did not always result in the drain holes being at the lowest point of the installed operator.
It is not presently known whether the existence of the drain plug or the orientation of the drain hole is essential to proper operation of the operator or is in conformance with the qualification tests for the operator.
5.
Various Limitorque operator limit switch gear frames were l
observed to be made of a white metal.
It is not presently known whether these gear frames are qualified for the service conditions.
6.
Information obtained from purchase order files and QVDP l
files does not agree with the installed components.
7.
It is presently not known whether space heaters are l
qualified or required to be qualified.
8.
Various 0-rings are located throughout the actuator.
It is l
not presently known whether these components are qualified for the service conditions.
9.
Unidentifiable terminal blocks (nonpower lead connectors l
inside the operators) were observed in other Limitorque operators.
It is not presently known whether these components are qualified for the service conditions.
To discuss concerns listed above, a meeting was held at Limitorque on August 31, 1982. A purchase order has been placed with Limitorque to conduct a component qualification document search for each safety-related Limitorque operator. A follow up meeting was held at Limitorque on November 5,1982, to expedite the documentation search work.
It is expected that Limitorque will submit these by December 17, 1982, 1268e
\\
}97629 Bechtel Associates Professional Corporation j
r97832 U
MCAR 46 Interim Report 10 Date Page 7 Safety Implications and Reportability 1.
Seven of the eight valve operators having underrated terminal blocks are located in the component cooling water and service water systems and are used on safety related valves. These must function on an emergency core cooling actuation signal. The potential exists for a short circuit /flashover which could render the valves inoperative.
Based on the potential safety concerns, this item was considered reportable. This deficiency was reported by Consumers Power Company on January 14, 1981, to R. Sutfin, R. Cook, and R. Knop of the Office of Inspection and Enforcement, Region III, U.S.
Nuclear Regulatory Commission, as a reportable deficiency for Midland Plant Un'its 1 and 2 in accordance with 10 CFR 50.55(e).
2.
Of the concerns expressed above, it is believed that Limitorque operators having a motor rating of 40C ambient temperature and Class B insulation have not been qualified for safety-related service inside the containment. Therefore, the operators may not perform their safety functions under postulated post accident conditions. However, this concern and the remaining concerns listed above should be regarded as indeterminate because insufficient information exists to classify them otherwise. The status of these concerns is still under investigation and is dependent on the results of the Limitorque component qualification document search. The status will be reported accordingly in future interim reports.
Probable Cause A.
Underrated Terminal Block According to Limitorque, it does not stock Marathon 100 Series terminal blocks. However, Limitorque believes (according to its January 21, 1981, letter) that when its field service engineer visited the Midland jobsite in November 1977 to increase the number of points on the terminal blocks for 66 operator 7 (P.O. 7220-M-132), he may have procured the subject terminal blocks locally. Limitorque further explained that an additional 20 terminal blocks (140 Series, manufactured by Cinch Jones) were shipped to Midland, to make up for quantities damaged in an earlier shipment. These blocks are similar to Marathon Series 100 blocks and may have been used by the Limitorque service engineer to terminate the 460 V motor leads. According 1268e
Bechtel Assocgtgrofessional Corporation MCAR 46 Interim Report 10 Date Page 8 to Limitorque's July 1, 1982 letter, the root cause for the presence of underrated terminal blocks was the lack of adequate training for a newly employed field service engineer.
B.
Unqualified Terminal Block According to Limitorque's July 1, 1982, letter, Buchanan 0824 terminal blocks have not been tested for environmental qualification. These terminal blocks were furnished with actuators built in 1974 to the specific requirements of an individual valve manufacturer.
However, the terminal blocks were considered qualified by analysis at the time they were supplied.
The Buchanan 0824 uses nylon construction, which is unacceptable in today's nuclear industry.
It is Limitorque's opinion that this terminal block would pass a nuclear qualification test; however, because of the stigma attached to the use of nylon in this application, the terminal block would still be considered unacceptable.
C.
Additional Qualification Concerns The additional concerns addressed above are still being evaluated. A discussion on the probable causes of these concerns will be covered in future interim reports.
l Corrective Action A.
Underrated Terminal Blocks During Limitorque's June 1982 inspection / replacement trip to the Midland jobsite, all underrated terminal blocks were replaced by correctly rated Marathon 300 Series terminal blocks on operators purchased on P.O. 7220-M-132(Q). The reports from Limitorque and the field covering the inspection / replacement activities and documentation of terminal block types Buchanan 0524 and Beau 7600 have been accepted. Thus, this deficiency will be considered completely resolved, pending the inspection of four operators on P.O. 7220-M117(Q), listed under Item 7 on Page 5 of this report.
B.
Unqualified Terminal Blocks 1.
The resubmitted qualification report from Limitorque is being reviewed and is expected to be complete by December 15, 1982.
1268e
O97629 Bechtel Associates Professional Corporation 97832 MCAR 46 Interim Report 10 Date Page 9 2.
The physical verification of the type of the terminal blocks used on each safety-related Limitorque operator will be included together with the inspection process to verify other concerns.
3.
Bechtel project engineering is to disposition NCR 3780 by December 31, 1982.
l C.
Additional Qualification Concerns Arrangements have been made with Limitorque to review the l
documentation of each Limitorque operator for the expressed concerns. The unqualified components / operators shall be replaced -
with qualified ones in accordance with the requirements. Based on the results of documentation review, further required action will be reported in future interim reports.
/.
d4[decd, Submitted by:
pr.T.Ballweg Mechanical Group Supervisor Approved by:
h n
E.M. Hughes Ann Arbor Project Engineer Concurrence by:
M. Fravel
\\
Chief Mechanical Engineer g
/
I Concurrence by:
to A
E. Seith Engineering Manager l
'9yyk, o ' Q Concurrence by.
M.A. Dietrich 3dd Project Quality J
Assurance Engineer i
i 1268e 1
A M 'H M E N T-2 097832 097629
~ LIMITORQUE CORPORATION w
j 5114 Woodall Road P. O. Box 11318
- Lynchburg, Virginia 24506 a
2 195235 ephone404-5286 Mex42&48 November 17, 1982 sp
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Bechtel Ascociates Professional Corporation A
P. O. Box 1300
.p V,
220.
x Ann Arbor,'4I 48106 c'"
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Mr. E. M. Hughes f
Attention:
Project Engineer,'
Gentlemen:
-%k b
Subject:
L_imitorque Operator Terminal Blocks We have researched our files in response to your October 14, 1982, request for additional terminal block information on the Buchanan 0524 and Beau 7600.
Enclosed are two sheets from Beau's Bulletin 340 printed in 1977 that shows a 600 volt rating on the Beau 76000 (currently called a Beau 7600) terminal block.
We have also attached copies of two pages from Buchanan's publication G-108 which shows a 1971 copyright date.
The medium duty Buchanan terminal block is their general classification for the Buchanan 0524.
The only rating found on this terminal block references a 750 volt rating in accordance with the IEEE switch gear standards.
l Please contact this office if we may be of any further assistance in this matter.
Very truly yours, i
\\'
LIMITORQUE CORPORATION D Q 3. V Daniel S. Warsing -
Technical Manager
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/ '..TisCi:MC NT. LC : N. i. -
Attachments IN faiDLCD NC'.Y.,.
C ' ',T IJ,.. ' SAC?
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'7, Automated Valve Actuators and Jacks for Industry
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-7:
- Bulletin
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.. &ji r ?! - 340 h
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-y E Series 76000 i
i E Double row; 3/8" centers E 20 amps,600 volts i
E Closed back and feed thru i
E Screw terminals Y~.
~
l l
ultrasonically welded in j
l E No. 6-32 x 1/4-inch screws
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BRUT!
Bend barriers without breaking Now a closed back strip with Beau's flexible barrier strips reduce breakage dramatically screw terminals that won't pull out because they are made of highly The 76000 series eliminates the problem of insecure T
resilient glass-filled thermoplastic terminal retention commonly found in closed back
')
materials The impact strength
/
double row barrier terminal strips The eyelets and is many times greater than
/
nails have been el;minated instead, screw terminals f
phenolic materials. Because are used (photo above)-and they are ult 3sonically the barriers can actually welded (imbedded) into the barrier strip making it bend without breaking, pro-virtually impossible to pull them out Another result; duction line and in-field it s a more rugged strip, and has a greater creep path.
damage are virtually elimi-nated Time-consuming re-wiring, and its high cost,is no longer a No insulating strip needed problem.
Because the 76000 series has a closed back, you can get the electrical rating you want-without the expense of buying and installing insulating strips.
Get 20 amps in the same space as 15.
These 20-ampere strips are designed to take the same Feed thru styles have panel space as any double-row 15-ampere barrier enclosed Contact tails terminal strip They are 7/8-inches wide and have screw The 76000 senes is also made in terminals 3/8-inches on centers-just like the following i
strips they are designed to replace-feed thru styles But, unlike the typical thru-hole, ours is virtu-alty the same size as the Con-BEAU: 14000.14000-T.15000.16000,16000-1,17000 tact tail This maximizes circuit CINCH: 140,164.240 isolation it also eliminates en-CURTIS: 1500 trapment of foreign matter-and ETC CANNON: 27000, 37000. 57000. 67000 reduces solder wicking l
GENERAL ELECTRIC: CR151-Type D1 and D7 l
KULK A: 600, 600A. 620A. 670, 670A. 800 Highest UL flame retardant rating M ARATHON: Senes 100 The thermoplastic matenal was selected to attain the highest flame retardant rating (self extinguishing) assigned by Underwriters Laboratories. 94V-0 The mawrial also offers negligible water absorption, high dielectric strength and low heat transfer.
2 1
SPECIFICATIONS 09?832 097629 Electrical rating:
20 amps; 600 v wire usage:
With binding head screw-1 *14 Awg With wire clamp-1-2 s14 Awg 3 *
- g.,, g. h With quick connect tab-16 816 Awg Terminal ceMers:
Materials:
Insulator-glass-filled thermo-plastics; U L. flame retardant No.of terminals:
1 to 30 (motded to length; no rating of 94V-0; color, black rough cut ends)
Terminals-high strength copper Base style:
Closed back or feed thru elloy, nickel plated Mounting:
With or without mounting ends Screw and wire clamp-steel, bright cadmium plated Terminal styles:
e6-32 x %* binding head screw Ouick connect tab-brass, cadmium (standard) plated Wire clamp plate, self nsing Solder terminal (single or do'ubfe)-
Queck connect tab (1 to 6 termina.
brass, hot tin d!pped tions per circuit)
Solder terminal, single or double Marking:
Imprinting available, directly on Feed thru solder.long and short base or on vulcanized fiber Feed thru PC,long and short h st@
Feed thru wire wrap Z terminal, over-the-side PC U.L. RECOGNIZED, C.S.A. CERTIFIED.
DIMENSIONS NO. OF c
CIRCUlTS A
Inch (mm)
Inch (mm)
Inch (mm)
B e
- 7 1*n (35.7) 1%
(28.6) 2%2 (2 t4)
(3 57mme
l'.n (45.2) 1W (38.1) 1%2 (31.0) 4 2%, (54.8) 174 (47.6) 1'** (40.5) g l
5 2'%2 (64 3) 2%
(57.2) 13 W2 (50.0) r- -
h h 6
22Sm (73 8) 2%
(66.7) 2"m (59 5) 2w3 7
3%2 (83,3) 3 (76.2) 22 % 2 (69,1)
)
t ip s4mm, 0a3
)h(
h
)h(
8 32W2 (92.9) 3% (85.7) 3%) (78.6) os.5mm,
+
9 dw2 (102) 3%
(95.3) 3'%2 (88 1) l
,g w
10 4 ' h2 (112) 4% (105) 32%2 (9 7.6) 11 42 % 7 (121) 4W (114) 4%2 (107) 160 DIA MTG g
holes i4 06mmi 12 5%2 (131) 474 (124) 4'e/n (117) pp
,,,. g, 34 (9 53 ' (9 53 (1 94 13 5'%2 (140) 5% (133) 42 W2 (126) 14 52*m (150) 5% (143) 5"m (136)
Ism
~
07 a eam tu4 15 6S/n (160) 6 (152) 52 % 2 (145) 16 62 % 2 (169) 6% (162) 6%2 (155) 17 7%2 (178) 6% (171) 6+n (164) 18 7%2 (188) 7% (181) 627% (174) i m
gn 19 72 % 2 (198) 7W (191) 7%2 (183) 0 5 '** ' '
I f
1 N
20 8%) (207) 774 (200) 7.n (193)
M "2
WD D'
GW M" WD
- - - ~
C -
H isk.
% ]'2mm 22 82*h2 (226) 8% (219) 8"'n (212) i3 it.54mmi is,smm, 23 9%2 (336) 9 (229) 82 % 2 (221) 24 92 W2 (245) 94 (238)
Mn (231) 25 10W2 (255) 9% (248) 9 ' %2 (241)
HOW TO ORDER 26 10 % 2 (264) 10W (257) 9m2 (250) 27 1 02 % 2 (274) 10W (267) 109n (260)
Beau Terminal Strips can be ordered by means of a 5-digit catalog 28 11 %2 (283) 10'.
(276) 10 % 2 (269) number as shown below. To obtain options, simply add as many 29 11'%) (293) 11 % (286) 10e n (279)
- dash numbers" as needed af ter the 5-digit number.
EXAMPLE:
76 1 08 -50 Series Type of No. of Options terminal circuits Terminal types (3rd digit):
7 Feed thru wire wrap
-10A Impnnt (style 10A)
O Binding head screws only 8 Z terminal, over the-side PC
-49 Nickel / brass binding head screws. =6-32 x '."
-50 Sems screws /nsing surface ciamp 1 One-sided solder Number of circuits (4th & Sth digits):
enu Ont i ek washed semw 2 Two-sided solder 01 to 30
-52 Sems (ext lock washer) screw 3 Feed-thru solder, short 4 Feed-thru PC, short Options (dash numbers):
-58 Barner supplied without screws 5 Feed-thru solder,long
-C Without mounting ends
-59 Screws supplied. unassembled 6 Feed-thru PC,long
-M With metnc screws
-66 Marker strip bonded to barner 3
s
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0078 2
4 Bu c% ppl fj S pgegal Terminal Blocks Ordering Information E
Tubular Contacts are listed by UL as " pressure Tubular Screw Type Tubular Clamp Type cable connectors" for the following combina-(Contact Cat. #199)
(Contact Cat. #299) tions:
1 #14 to 1 #8 AWG.
1 #18 to 1 #10 AWG.
2 or 3 #12 AWG.
2 #12 AWG.
2 to 4 #14 AWG.
2 or 3 #14 AWG.
I to 4 #16 AWG.
2 to 4 #16 AWG.
A 1 to 5 #18 AWG.
2 to 5 #18 AWG.
'4 UL does not list clamp bearing connectors for 9
M smaller than #18. Blocks are listed by Cana-M dian Standards Association.
l $ ;g$.,
j V
FEATURES Packaging Contact sections are packaged in pre assem-Moldings are medium impact phenolic (CFG per MIL M-bled lengths of 20 per box. End sections are packaged 14). Resist heat, moisture, solvents, shock. Other MIL-srparately - 25 per box.
M 14 compounds available on special order.
Factory assembled flat base blocks containing up to 12 Strap screw contacts have #6 binding h'ead screws with circuits are standard catalog items.
concentric ridges under head for tighter gripping. Maxi-Factory assembled channel mounted blocks containing up mum width of lugs - $"
to 156 circuits in a 6 ft. Channel - 74 circuits in a 3 ft.
" Quick Connect" contacts are b'ade type (250" x.032").
channel - are standard catalog items.
Accept %" female tab type terminals.
Choice of four contact types: tubular screw, tubular clamp, strap screw, 'and Quick Connect." All contacts Accessories simplify job: Available for use with the MD are plated to resist corrosion.
blocks are steel and prepunched aluminum channel for l
No lugging with tubular clamp and tubular scre.v con-rnountag up to H6 McW rnounMg clamp 2 W W C
tacts. Simply insert wire and tighten screw.
marking strips for identifyung curcusts; holding plugs for Tubular clamp contact screws cannot shake loose. Ctamp the slide-in strips; see thru covers for dead front safety; is captive to the screw: screw is captise to the contact.
ganging rods for the covers; jumpers to make adjacent Fcur marking methods available: Phin marking area, contacts common; and marking pens especially designed painted marking area, sfide-in vinyl rnarking strip, and for use on vinyl, nylon, and polypropylene surfaces. For pressure sensitive marking tape (roll or sheet).
complete ordering information see foldout page 56
" Quick Connect" blocks simp'afy the making of connec-l tions between circuits. Furnished with various combina-NOMINAL DIMENSIONS OF ASSEMBLED FLAT BASE BLOCKS
- l tions of " Quick Connect" contacts and tubular screw (for Standard factory Assembled Channel Mounted Blocks, l
contacts, these blocks combine speed and flexibility.
Add l'ha" to C and 2%" to U i
NO OF DIMENSIONS-INCNES NO. OF DIM E Ns10N1-INCHES I
QUICK CONNECT C R T *3-c L
Cut s.
c t
BLOCK 1
1 14 6%"
6' l
91 2
1:U" l'b" 15 7b" 7b" l
h
')
e 3
1*
l' 16 7 ' %"
7' j
j r
4 2'
28 %"
17 7' 0" 8 ' U" l
5 23%"
2' 18 8'
8' 6
3%"
3b" 19 8' u "
9%"
SPECIFICATIONS 7
3' 3%"
20 9N*
9%"
Wire Range: e22.*8 AWG or equivalent combinations.
8 3' N 4N" 21 9' N" 9' b" Voltage Rating: Blocks withstand voltages greatly in ex-i 9
4 r g" 4e %"
22 10 %"
10 %"
I cess of IEEE switchgear standards for 750 volts.
10 4' %"
5 23 10'%"
10'0 "
Temperature Rating: Blocks operate safely at tempera-11 5'%"
5' 24 11 U" 11' U "
l tures to 302* F.
12 5%"
S' U" 25 11' %"
11' %"
l Center To Center Spacing: L" Allows 26 cir.uits per l
foot.
' Sit OlMEN$10N AL ORAWINGS ON PAGE 19.
18
6 ti 9 7 8 3 2 E'
Orderin Information Sectional Term.inal Bloc a n, r. - -
N 4I Ufy 0 FOR USER'S ASSEMBLY / Snap-Fit Sections Complete with Factory Installed Contacts mines i. MuitiRies e, s:,we exuse wet.iies onio FLAT BASE DOVETAll BASE for direct mour: ting for channel mounting shipping MARK G AREA
- WARKIN ARIA shippteg MARK G ARE A*
MARKlN AREA k
SECTION Ei'8/d SECTION si'8/j CONTACT
""'"I ENU PriIe' IceE#UE Prfce')ct Es'eYr criceIct ENr Price' Cf e
T Type SS 20 24 511
$30.05 521
$31.35 28 0511
$31.15 0521
$32.45 Strap Screw tire: #8 or smaller Type TS 20 4
30 514 32.05 524' 33.40 34 0514 33.15 0524 34.50 Tubular Screw W're:
- 18 - #8 Type TC '
31 515 39.30 525 40.65 35 0515 40.40 0525 41.75 20 Tubular Clamp Cire:
- 22 - #10 20 18 510 27.85 520 29.15 22 0510 28.95 0520 30.25 2 Quick Connect tire: #12 and smaller 20 21 516 29.05 526 30.35 25 0516 30.15 0526 31.45 3 Quick Connect k
Cire: #12 e
and smaller 20 24 517 3025 527 31.55 28 0517 31.35 0527 32.65 I
4 fuick Cornect Wirt: # 12 and smaller 1 Tubular Screw i
Q r
20 25 518 31.45 528 32.80 29 0518 32.55 0528 33.90 1 Quick Connect Cire: #12 and smaller 1 Tubular Screw fy 20 26 519 32.65 529 34.00 30 0519 33.75 0529 35.10 2 Quick Connect s
Wire: *12 and smaller fnd Section 25 12 530 22.00 530 22.00 17 0530 23.30 0530 23.30
- For use wett separate marking strips, for marking derett'y se blocks, or skere se marting is regibred.,
g 9 s[1 lNstc[ FRJMT CcV[R rcR DisecuMTS,1[RMS, CON 0lli4Ns
D van Features & Specifications u97629 Sectional Terminal Blocks y
H FLAT BASE DIMENSIONAL DRAWINGS
,' c C
r 24" ~
l l
Mount with =8
~
J p--'-
g
~
achine s rews I
e M
{
about every
,J 1-
,, 12 circuits.
.g-g' '~g-(T 7
-l T
'- 1 Tl 9
_F 1.
T.
.i.
i
=
t
=
d m" h
/o O
o w..
<l
's L
C* =.437 + (.442 x N) i a
L' =.655 + (.442 x N)
- 1 % " --=-
N = Number of Circuits l;=
C
=l Mount with =10 CHANNEL MOUNTED
,397 p
ree _ w 0ck-r y
r-n n a n-n at._
b h, i
@ E:
- R: ] { 3-
- 2W5:iin;;
i
++
l l
h h
d N = Number of Circuits
.x,z._,,
_,r.
_. r.-
m..& W & m~'&
u~
(Standard Factory Assembled - 2 thru 156 circuits) im-a
'-Irl~'irl~
"Irri l
f l l 1%"
l JI l
~ I L" ---*
1
-r L
SECTIONAL FANNING STRIPS Of-d-
4 A
b A
g y
LtSLMd 4
s..
a
[
h f
.-.u -, 4 ~ -
~1*"A 0
ff.
,L ff
_-- I' n ~ ~
- Q ;
L
)
~
(
~"
~
See page 55 for Fanning Strip Features.
19