GE IAV51A Instructions Manual page 8

Voltage Relays Type IAV
GEH-1814
PERCENTAGE OF VOLTAGE TO CLOS�
AT WHICH RIGHT CONTACTS WERE SET
4
3
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2
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BUS
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POTENTIAL
TRANSFO RWEAS
DEY ICE FUNCTION NUWBERS
52 - POWER CIRCUIT BREAKER
59- A-C OYERYOLTAGE RELAY, TYPE IAV51A
��: m�-����NIT - AUXILIARY CONTACT CLOSED WHEN BREUER CLOSES
•
WITH TARGET
Fig, 5 Connection Diagram Of Type IAY51A Relays
Used For Overvoltage Protection
8
50% 60% 70% 80 90 95
20 40
60 80
PER CENT OF VOLTAGE REQUIRED TO CLOSE LEFT CONTACTS
Fig. T ime-Voltage Curves For Type IAV53D Relay
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TIME TO CLOSE RIGHT CONTACTS WHEN VOLTAGE IS SUDDENL
REDUCED FROM VALUE EQUAL OR GREATER THAN VOLTAGE
REQUIRED TO CLOSE LEFT CONTACT TO VALUES ON THE CURVE
TIME TO CLOSE LEFT CONTACTS WHEN VOLTAGE
ON THE CURVE.
PERCENTAGE OF VOLTAGE TO CLOSE
LEFT CONTACTS AT WHICH RIGHT
CONTACTS WERE SET TO CLOSE.
LEFT CONTACTS CLOSED
100 120 140 160
I>
WHEN USED
FOR ALARM
I
DIS TR IBU TION
TRANSFORNER
DESCRIPTION
,[:IRCUIT BREAKER
AC OVERVOLTAGE RELAY TYPES lAV51D & IAV51K
CAPACITOR
c
S A- N UNIT WITH
AUX I Ll ARY HAND RESET RELAY TYPE HE A
86
Fig,
6 Connection D iagram For The Type IAV51D
And IAVSIK Relay
50%
70%
80%
90%
95%
180 200
lAV51D
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I
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L
______
IAV51K
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- - -
- --,
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5 9
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1
3
I EXTrRNAL
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15
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C PACITOR
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LEGEND
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