MS27749F
Table II. Operating characteristics.
Part no. MS 27749- |
Coil data |
Time - (milliseconds maximum) |
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|
Coil |
Nominal |
Max at +25°C |
Max pick-up voltage |
Drop out volt- age 2/ |
Oper -ate 3/ |
Rel- eas e 4/ |
Contact Bounce |
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Volts 1/ |
Freq Hz |
n Res ±10% |
Volts |
Amp |
Nor- mal 2/ |
High temp test |
Cont cur- rent test |
Main |
Aux |
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NO |
NC |
NO |
NC |
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1 |
X1,X2 |
28 |
dc |
200 |
29 |
.190 |
18 |
20 |
21 |
N/A |
35 |
--- |
3 |
3 |
--- |
--- |
2 |
Y1, Y2 |
28 |
dc |
200 |
29 |
.190 |
18 |
20 |
21 |
N/A |
--- |
35 |
3 |
3 |
--- |
--- |
1/ Contact transfer time @ rated voltage, 1.8 milliseconds minimum.
2/ Over the temperature range.
3/ With nominal coil voltage.
4/ From nominal coil voltage.
TABLE III. Rated contact load (amperes per pole) case grounded.
Type of load |
Life operat ing cycles x 103 |
28 V dc |
115 V ac, 1 phase |
115/200 V ac, 3 phase 1/ |
See appro priate notes |
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Main |
Aux |
Main |
Aux |
Main |
Aux |
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NO |
NC |
NO |
NC |
400 Hz |
60 Hz |
400 Hz |
60 Hz |
400 Hz |
60 Hz |
400 Hz |
60 Hz |
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Resistive |
50 |
50 |
50 |
60 |
60 |
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Inductive |
20 |
20 |
20 |
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Inductive |
50 |
60 |
60 |
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Motor |
50 |
20 |
20 |
40 |
40 |
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Lamp |
50 |
10 |
10 |
15 |
15 |
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Transfer load |
10 |
12.5/ 60 |
12.5/ 60 |
2/ |
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Mechanical life reduced current |
200 |
7 |
7 |
14 |
14 |
2/ |
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Mixed loads |
50 |
1 |
1 |
5 |
5 |
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1/ Absence of value indicates relay is not rated for 3 phase applications.
2/ Transfer load indicates relay suitable for transfer between unsynchronized ac power supplies at rating indicated.
12.5 amps for -1, 60 amps for -2.
APPLICATION, NOTES:
1. Examination of product, external parts shall be performed in accordance with MIL-PRF-6106, except the case
temperature shall be limited to 150°C maximum.
2. Strength of terminals, shall be performed in accordance with MIL-PRF-6106, except it shall be tested at room ambient temperature only.
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