GE IRT51 E, Инструкция по эксплуатации, Страница: 8 / 51

GEK-86038
cu rrents ranging f rom 0 . 2 to 2 . 0 am ps DC at the m1n1mum control voltage. If this
tap is u sed with trip co il s requi ring m o re than 2 . 0 am ps , there i s a po s sibility,
.that the 7 . 0 ohms res istance of the target s eal-in unit wi 1 1 red uce the cu r rent to'
such a 1 ow value that the breaker will not be tri pped.
The 2. 0 amp ta p sho ul d be used with tri p coils that take 2 . 0 am ps DC o r m o re at
the minimum control voltage . The tripping cu rrent sho uld not exceed 30 am ps at the
maximum c ontrol voltage. If the tri pping cu r rent exceeds 30 am ps , an auxiliary
relay sho uld be used so the tripping c u r rent does not pas s thro ugh the target seal­
in unit.
The I RT51 F relay is furnished with a target unit and an auxiliary telephone
type relay. The auxiliary circuit may be u s ed with 1 20 or 240 volts AC , 5 0 or 60
hertz , o r with 125 o r 25 0 volts D C* . A voltage level selection link i s located
inside of the relay on to p of the res istor m ounting plate , and is marked 11LOW" for
120 and 125 volts , and 11 HIGH" fo r 240 and 25 0 volts . This link must be in the
po sition corres ponding to the voltage level being a pplied. The IRT51F relay is
shipped f rom the facto ry with the 1 ink in the 11 HIGH" pOsition.
*
Some models of the IRT51F( -)A relay are rated at 110/220 VAC or D C . See
Table I .
The target s hows whenever an ove rtem pe rature condition is fi rst sensed . It
must be manually reset . The target is not a s eal-in type .
The auxiliary telephone-type relay contact s will close and car ry 30 am ps D C
momenta rily f o r t ri p ping duty at-control voltages of 2 50 volts D C or less . These
contact s will car ry one am p continuo u sly and have an interrupting rating as shown in
Table 3 .
TABLE 3
AUXILIA RY TELEP HONE-TYPE RELAY INTE RRUP TING RATINGS
A MP IN DUCTIVE A MP NON-IN DU CTIVE
110 0 . 8 0 2 .1
Volts A C 120 0 . 75 2 . 0
( 5 0/60 hertz)
220
I
0 . 55 1 .1
I
240
I
0 . 5 0 1 . 0
Volts D C 48 1. 0 3 . 0
110
i
0 . 5 1 . 7
125 0 . 5 1 . 5
220
0 . 28 0 . 78
250 0 . 2 5 0 . 75
The IRT51G is fu rnished with a target s eal-in unit and a latching-type
auxiliary telephone relay . See TARGET SEAL-IN UNIT RATINGS, Table 2; and AUXILIARY
TELEP HONE TYPE RELAY INTERR UPTING RATIN GS , Table 3 .
The auxiliary circuit will o perate wheneve r an overtem pe rature condition is
sensed . The relay wi 1 1 not pe rmit the auxiliary circuit to reset unti 1 the detected
tem perature decreases to bel ow a preselected tem pe rat ure 1 evel , and the right-hand
(IRTR) contact has closed .
7
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