ML17312A128
| ML17312A128 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 05/05/1972 |
| From: | EBASCO SERVICES, INC. |
| To: | |
| Shared Package | |
| ML17312A008 | List:
|
| References | |
| 8770-B-327, NUDOCS 9702060106 | |
| Download: ML17312A128 (1) | |
Text
DEV I CE NO.
DEFINITION AND FUNCTION (CONT'D) 23 TEMPERATURE N
DE IS A
DEV ICE THAT FUNCTIONS TO RAISE OR LOWER THE TEMPERATURE OF A
MACH INE OR OTHER APPARATUS, OR OF ANY MEDIUM, WHEN ITS TE MPERATLIRE FALLS
- BELOW, OR R
I SES
'ABOYE, A
PREDETERMINED VALUE.
NOTE:
AN EXAMPLE IS A THERMOSTAT THAT SWITCHES ON A SPACE HEATER IN A
SWITCHGEAR ASSEMBLY WHEN THE TEMPERATURE FALLS TO A
DES IRED YALUE AS D ISTINGUISHED FROM A
DEY ICE THAT IS USED TO PROV IDE AUTOMATIC TEMPERATURE REGULAT ION BETWEEN CLOSE LIMITS AND WOULD BE DESIGNATED AS DEVICE FUNCTION 90T.
24 RESERVED FOR FUTURE APPLICATION.
25 Jgj~jLE. IS A
DEV ICE THAT OPERATES WHEN TWO a-c C IRCU ITS ARE W ITH IN THE DE-S IRED LIMITS OF FREQUENCY, PHASE
- ANGLE, OR
- VOLTAGE, TO PERMIT OR TO CAUSE THE PARALLELING OF THESE TWO CIRCUITS.
26 APPARATU E
A D
E IS A
DEV ICE THAT FUNCTIONS WHEN THE TEMPERATURE OF THE SHUNT FIELD OR THE AMORT ISSEUR WIND I NG OF A
MACH INE, OR THAT OF A
LOAD LIMITING OR LOAD SHIFT ING RE-S ISTOR OR OF A
LIQUID OR OTHER MED IUM, EXCEEDS A
PREDETERMINED VALUE; OR IF THE TEMPERATURE OF THE PROTECTED APPARATUS, SUCH AS A
POWER RECT, IF I ER, OR OF ANY MED I UM DECREASES BELOW A
PREDETERMINED VALUE ~
THE APPARATUS TO WHICH THE THERMAL DEYICE IS APPLIED MAY BE IDENT IF IED BY USE OF A SUITABLE SUFF IX, SUCH AS 26-PC, MEANING PUMP CASE OVERTEMPERA-TURE DEV ICE.
27 UNDER VOLTAGE RELAY IS A
RELAY THAT FUNCTIONS ON A GIVEN VALUE OF UNDER-DEVICE NO.
DEFINITION AND FUNCTION (CONT'D)
VOLTAGE. (APPLICABLE BOTH TO a-c AND d-c DEV ICES. )
28 L
DETE TOR IS A
DEV ICE THAT MONI-TORS THE PRESENCE OF THE PILOT OR MA IN FLAME IN SUCH APPARATUS AS A
GAS TURB INE OR A
STEAM BOI LER.
29 ISOLAT ING CONTACTOR IS A
DEV ICE THAT IS USED EXPRESSLY FOR D ISCONNECTING ONE C IRCU IT FROM ANOTHER FOR THE PUR-POSES OF EMERGENCY OPERAT ION, MA INTE-
- NANCE, OR TEST.
30 ANNUNC IATOR RELAY IS A
NONAUTOMATICALLY RESET DEV ICE THAT G IVES A
NUMBER OF SEPARATE V ISUAL IND ICAT IONS UPON THE FUNCT IONING OF PROTECT IVE DEY ICES, AND WHICH MAY ALSO BE ARRANGED TO PERFORM A
LOCKOUT FUNCTION.
3I SEPARA E
EX A
IS A
DEY ICE THAT CONNECTS A
C IRCUIT, SUCH AS THE SHUNT FIELD OF A
SYNCHRONOUS CONVE.RTER, TO A
SOURCE OF SEPARATE EXCITATION DURING THE STARTING SEQUENCE:
OR ONE THAT ENERGIZES THE EXCITATION AND IGNITION CIRCUITS OF A
POWER RECTIFIER.
32 DIRE TIONAL POWER RELAY IS A
DEVICE THAT FUNCTIONS ON A DESIRED VALUE OF POWER FLOW IN A GIVEN D IRECT ION OR UPON REVERSE POWER RESULTING FROM ARC-BACK IN THE ANODE OR CATHODIC C IRCU ITS OF A
POWER RECT IF IER.
33 PO IT ION SWIT H
IS A
SWITCH THAT MAKES OR BREAKS CONTACT WHEN THE MAIN DEV ICE OR PIECE OF APPARATUS WHICH HAS NO DE-V ICE FUNCTION NUMBER REACHES A
G IYEN POS IT I ON.
34 MASTER SEQUENCE DEV ICE IS A
DEV ICE SUCH AS A
MOTOR-OPERATED MULTICONTACT
PRO-GRAMMING DEV ICE, SUCH AS A COMPUTER, DEVICE NO.
DEFINITION AND FUNCTION (CONT'D)
THAT ESTABLISHES OR DETERMINES THE OPERATING SEQUENCE OF THE MAJOR DE-Y I CES IN AN EQU I PMENT DUR I NG START-ING AND STOPPING OR DURING OTHER SEQUEN'TIAL SWITCH ING OPERAT IONS.
35 BRLIS H-OPER AT! NG OR S L I P-R I NG SHORT-CIRCUITING DEV ICE IS A
DEV ICE FOR RAIS ING, LOWER ING, OR SHIFTING THE BRUSHES OF A MACHINE.
OR FOR SHORT-C IRCU IT ING ITS SLIP R INGS, OR FOR ENGAG ING OR D ISENGAG ING THE CONTACTS OF A MECHANICAL RECTIF IER.
36 POLAR ITY OR POLAR IZ I NG VOLTAGE DEV ICE IS A
DEV ICE THAT OPERATES, OR PERMITS THE OPERAT ION OF, ANOTHER DEV ICE ON A
PREDETERMINED POLAR ITY ONLY, OR VER I-F IES THE PRESENCE OF A
POLAR IZ I NG VOLTAGE IN AN EQUIPMENT; 37 UNDERCURRENT OR UNDERPOWER RE LAY IS A
RELAY THAT FUNCTIONS WHEN THE CURRENT OR POWER FLOW DECREASES BELOW A
PRE-DETERMINED VALUE.
38 BEAR ING PROTECTIVE DEV ICE IS A
DEY ICE THAT FUNCTIONS ON EXCESS IVE BEARING TEMPERATURE, OR ON OTHER ABNOR MA L MECHANICAL COND IT IONS ASSOCIATED WITH THE BEAR ING, SUCH AS UNDUE WEAR, WHICH MAY EVENTUALLY RESULT IN EXCESS IVE BEAR ING TEMPERATURE OR FA ILURE.
THE BEAR ING TO WH I CH THE PROTECTIVE DEV ICE IS APPLIED MAY BE IDENT IF IED BY USE OF A SUITABLE SUFF IX, SUCH AS 38-MI, MEAN ING MOTOR I NBOARD-BEAR ING TEMPERATURE MON ITOR.
39 ME HANI AL NDI ION M NI IS A DE-V ICE THAT.FUNCTIONS UPON THE OCCURRENC OF AN A BNOR MAL MECHANIC A L COND I T I ON (EXCEPT THAT ASSOCIATED WITH BEARINGS AS COVERED 'UNDER DEV ICE FUNCT ION 38),
SUCH AS EXCESSIVE YIBRATION, ECCENTRI-DEVICE NO.
DEFINITION AND FUNCTION (CONT'D)
C ITY, EXPANS ION,'HOCK, TILT ING.
OR SEAL FAILURE.
'S A
FUNCTIONS TO START THE ABLE UNIT IN A MULTIPLE-MENT UPON THE FA I LURE OR I L ITY OF THE NORMALLY PRE-T.
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40 F IELD RELAY IS A
RELAY THAT FUNCTIONS ON A
G I YEN OR ABNORMALLY LOW VALUE OR FA ILURE OF MACHINE F IELD CURRENT, OR ON AN EXCESS IVE VALUE OF THE REACTIVE COMPONENT OF ARMATURE CURRENT IN AN a-c MACH INE IND ICAT I NG ABNORMALLY LOW F
I ELD EXC I TAT I ON.
41 F IELD I
T E
IS A
DEV ICE THAT FUNCTIONS TO APPLY OR REMOVE THE FIELD EXC ITAT ION OF A MACHINE.
FOR AUXILIARY CONTACT DESIGNATIONS SEE DEV ICE NUMBER 52.
IS A
DEV ICE WHOSE PRINC IPAL FUNCTION IS TO CONNECT A
MACHINE TO ITS SOURCE OF RUNNING OR OPERATING VOLTAGE.
TH IS FUNCT ION MAY ALSO BE USED FOR A
DEV ICE, SUCH AS A
CONTACTOR, THAT IS USED IN SER IES WITH A
C IRCUIT BREAKER OR OTHER FAULT PRO-TECTING MEANS, PR IMAR ILY FOR FREQUENT OPENING AND CLOS ING OF THE C IRCU IT.
42 FOR AUXILIARY CONTACT DES IGNATIONS SEE DEVICE NUMBER 52 43 MANUAL TRANSFER OR ELE TO DEV I
E IS A
MANUALLY OPERATED DEVICE THAT TRANS-FERS THE CONTROL C IRCU ITS IN ORDER TO MOD IFY THE PLAN OF OPERATION OF. THE SWITCHING EQUIPMENT OR OF SOME OF THE D E YJ.CZS NOTE:
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