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Section
Title
I.
Specifications .................................................................................................................
II.
Installation......................................................................................................................
III.
Theory of Operation .....................................................................................................
IV.
Maintenance...................................................................................................................
Figure 1
Dimensions ....................................................................................................................
Figure 2
Connection Diagram ....................................................................................................
APPLICATION:
Voltage Rating Line-to-Neutral
Power Rating
Protection Modes
Varistor Voltage, @ 1 mA dc, L-N
Suppression Voltage at Protector Terminals with
5 kA 8/20 µs
10 kA 8/20 µs
20 kA 8/20 µs
Minimum Life with 10 kA, 8/20 µsec, per phase
Maximum Surge Current Rating, per phase
Operating Temperature Range
Maximum Operating Altitude
Power Consumption
Remote Monitoring Circuit Contact Rating
*Surge Currents greater than 28 kA 8/20 µs may require replacing the fuse to restore protector
function.
MAG/MNL145740(A)
TABLE OF CONTENTS
I. SPECIFICATIONS
Joslyn P/N 1457-40
AC Surge Protector
L-G, N-G
per mode L-N, L-G
N-G
2
400Y/230 Vac, 3φ, 4 Wire plus
Ground, Grounded Wye
220 - 250 Vac
Unlimited
L-N, L-G, N-G
470 V
660 V
L-N
L-G, N-G
980 V
1220 V
1080 V
1305 V
1560 V
1795 V
2,000 Operations
100 kA 8/20 µs
50 kA 8/20 µs
100 kA 8/20 µs
-40C to +85C
5,000 Meters
Less Than 4.2 Watts
3 A @ 240 Vac
3 A @ 32 Vdc
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