ML17312A175
| ML17312A175 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 01/17/1997 |
| From: | EBASCO SERVICES, INC. |
| To: | |
| Shared Package | |
| ML17312A008 | List:
|
| References | |
| 8770-B-327, NUDOCS 9702060369 | |
| Download: ML17312A175 (1) | |
Text
DEVICE NO.
DEFINITION AND FUNCTION {CONT'D)
OPENING OPERATION IN AN AUTOMATIC SEQUENCE OR PROTECT IVE RELAY SYSTEM.
{T IME-DELAY OPENING IS DEF INED AS T
I ME-DELAY DROPOUT OF ARMATURE. )
E RELAY IS A RELAY THAT OPERATES ON GIVEN VALUES OF LIQUID OR GAS PRES-SURE OR.
ON G
I YEN RATES OF C HANGE OF THESE VALUES.
SPEC IF IC APPLICATIONS OF PRESSURE SW ITCHES MAY BE IDENT IF IED BY USE OF SUITABLE SUFF IXES, SUCH AS 63-S, MEAN ING SUCT I ON PRESSURE; 63-D, MEANING D ISCHARGE
- PRESSURE, ETC.
6%
GROUND PROTE TI E
REL Y
IS A
RELAY THAT FUNCTIONS ON FAILURE OF THE INSULAT ION OF A
MACH INE, TRANS-
- FORMER, OR OF OTHER APPARATUS TO
- GROUND, OR ON FLASHOVER OF A d-c MACH INE TO GROUND.
NOTE:
THIS FUNCTION IS ASS IGHED ONLY TO A
RELAY THAT DETECTS THE FLOW OF CURRENT FROM THE FRAME OF A MACHINE OR ENC LOS-ING CASE OR STRUCTURE OF A
PIECE OF APPARATUS TO
- GROUHD, OR DETECTS A
GROUND ON A NOR-MALLYY UNGROUNDED WINDING OR C IRCUIT.
IT IS NOT APPLIED TO A
DEV ICE CONNECTED IN THE SE-CONDARY C IRC'U IT OF A
CURRENT TRANSFORMER, OR IN THE SECONDARY NEUTRAL OF CURRENT TRANSFORMERS, CONNECTED IN THE POWER C IRCUIT OF A
NORMAl LY GROUNDED SYSTEM.
{NOT TO BE USED FOR LINE OR FEEDER 65 ~~~Q IS THE ASSEMBLY OF
- STARTING, HOLD IHG SPEED OR
- LOAD, OR STOPPING.
66 NOTCHING OR JOGG ING DEV ICE IS A DE-V ICE THAT FUNCTIONS TO ALLOW ONLY A
SPEC IF IED NUMBER OF OPERAT IONS OF A
GIVEM DEV ICE, OR EQUIPMENT.
OR A
SPEC IF IED NUMBER OF SUCCESS IVE OPER-AT I ONS W ITH IN A
G IYEN T I ME OF EACH OTHER.
IT IS ALSO A
DEV ICE THAT FUNCTIONS TO ENERGIZE A CIRCUIT PER IOD ICALLY OR FOR FRACTIONS OF S PEC IF I ED T
I ME I NTERVA LS, OR THAT IS USED TO PERMIT INTERMITTENT AC-CELERATION OR JOGGING OF A
MACHINE AT LOW SPEEDS FOR MECHANICAL POS I-T ION ING.
67 A-IRE I
MAL OVER URRENT RELAY IS A
RELAY THAT FUNCTIONS ON A DE-S IRED VALUE OF a-c OYERCURRENT FLOW ING IN A
PREDETERMINED D IREC-T I ON.
68 IS A
RELAY THAT INI-TIATES A
PILOT S IGNAL FOR BLOCKING OF TRIPPIHG ON EXTERNAL FAULTS IN A
TRANSMISSION LINE OR IN OTHER APPARATUS UNDER PREDETERMINED CON-
- DITIONSS, OR COOPERATES WITH OTHER DEV ICES TO BLOCK TRIPPING OR TO BLOCK RECLOS ING ON AN OUT-OF-STEP COND IT ION OR ON POWER SW INGS.
IS GEN-ERALLY A TWO-POS ITION, MANUALLY-OPERATED SW ITCH THAT, IN ONE POS I-T ION, PERMITS THE CLOSING OF A.
CIRCUIT
- BREAKER, OR THE PLAC ING OF AN EQUIPMENT INTO OPERATION, AND IN THE OTHER POSITION PREVENTS THE C IRCU I
FROM B
BR'E~FR O'R THE EQ'Dl PMEHT I
I 86) (P)E RATED II~ItIL,.-,.".
EV ICE NO.
DEFINITION AND FUNCTION {CONT'D) 70 ~i~ IS A
VAR IABLE RES ISTAHCE DEY ICE USED IN AH ELECTR IC C IRCU IT, WHICH IS ELECTR ICALLY OPERATED OR HAS OTHER ELECTR ICAL ACCESSOR IES, SUCH AS AUX ILIARY, POS ITION, OR LIMIT SWITCHES.
7I FOR AUX I L IARY CONTACT DES I GMAT I ONS SEE DEV ICE NUMBER 52.
ID A
L RELAY IS A RELAY THAT OPERATES ON GIVEN VALUES OF L IQLI ID OR GAS LEVEL OR OM G IYEH RATES OF CHANGE OF THESE VALLIES.
SPEC IF IC APPLICATIONS OF LEVEL SWITCHES MAY BE IDENT IF IED BY USE OF SUITABLE SUFF IXES, SUCH AS 71-SO, MEAH ING LEVEL OF SEAL OIL; 71-ST, MEAN ING LEYEL OF STORAGE TAMK, ETC.
72 IS A
C IRCU IT BREAKER THAT IS USED TO CLOSE AND INTERRUPT A d-c POWER C IRCU IT UNDER NORMAL COND IT IOHS OR TO INTERRUPT THIS C IRCU IT UNDER FAULT OR EMER-GENCY COND IT IONS.
FOR AUX I L IARY CONTACT DES I GNAT I ONS SEE DEV ICE NUMBER 52
~
73 LOAD-RES ISTOR CONTACTOR IS A CONTAC-TOR THAT IS USED TO SHUNT OR INSERT A
STEP OF LOAD LIMITING, SHIFTING, OR INDICATING RESISTANCE IN A
POWER
- CIRCUIT, OR TO SWTICH A
SPACE HEATER IN C IRCU IT, OR TO SW ITCH A
L I GHT OR REGENERAT IVE LOAD RES ISTOR OF A
POWER RECT IF IER OR OTHER MACH INE IN AND OUT OF CIRCLIIT.
7%
ALARM RELAY IS A RELAY OTHER THAN AN ANNUNC IATOR, AS COVERED UNDER DEY ICE FUNCTION 30, THAT IS USED TO
- OPERATE, OR TO OPERATE IN CONNECTION WITH, A
DEV I CE NO.
DEFINITION AND FUNCTION (CONT'D)
DEVICE NO.
DEFINITION AND FUNCTION (CONT'D)
V ISUAL OR AUD IBLE ALARM.
75 POS ITIOM CHANGING MECHANISM IS A MECH-AN ISM THAT IS USED FOR MOY ING A
MA IN DEV ICE FROM OHE POSITION TO ANOTHER IH AN EQU! PMENT:
AS FOR
- EXAMPLE, SH IFT ING A
REMOYABLE C IRCU IT BREAKER UNIT TO AHD FROM THE CONMECTED, D ISCONNECTED, AND TEST POSITIONS 76 D-0 ER URREHT RELAY IS A RELAY THAT FUNCTIONS WHEN THE CURRENT IN A d-c C IRCU IT EXCEEDS A
G I VEN VALUE.
77 PULSE TRANSMITTER IS USED TO GENERATE AHD TRAHSMIT PULSES OVER A TELEMETER-ING OR PILOT-WIRE CIRCUIT TO THE RE-MOTE IND ICATING OR RECE IV ING DEV ICE.
78 PHASE-AHGLE MEASUR IH R
PROTECT IVE RELAY IS A
RELAY THAT FUNCTIONS AT A
PREDETERMINED PHASE ANGLE BETWEEN TWO YOLTAGES OR BETWEEN TWO CURRENTS OR BETWEEN VOLTAGE AND CURRENT.
79 A-RE S
A RELAY THAT CONTROLS THE AUTOMATIC REC LOS IHG AHD LOCKIHG OUT OF AH a-c CIRCUIT INTER-RUPTER .
80 LI UID 0
S FL ELAY IS A RELAY THAT OPERATES OH GIVEN VALUES OF LIQUID OR GAS FLOW OR ON GIYEN RATES OF CHANGE OF THESE VALUES
SPECIFIC APPLICATIONS OF FLOW SWITCHES MAY BE IDENT IF IED BY USE OF SU ITABLE SUFF IXES, SUCH AS BO-LO, MEANING FLOW OF LUBR ICAT ING Ol L; 80-W, MEANING FLOW OF
- WATER, ETC.
BI FRE UENCY. RELAY IS A
RELAY THAT FUNC-TIONSS ON A
PREDETERMINED YALUE OF FREQUENCY
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