Lbs Switch; Starter Fuse Information - Eaton Cutler-Hammer AMPGARD Technical Data Manual

LBS Switch

TABLE 7. LBS SWITCH RATINGS
DESCRIPTION
Switch with Internal Fuses
(450E Maximum at 5 kV, 350E Maximum at 7.2 kV)
Switch with 600E and 750E Fuses
(5 kV Maximum)
Switch with 1100E and 1350E Fuses
(5 kV Maximum)
Unfused (7.2 kV Maximum)
1200 ampere rating is for NEMA 1 enclosure with vented covers. NEMA 3/12 rating (without vents) is 1000 amperes.

Starter Fuse Information

TABLE 8. FUSE COORDINATION RECOMMENDATIONS
MINIMUM FLA MAXIMUM FLA
400 Ampere Contactor
10.0 22.9
23.0 31.1
31.2 41.9
42.0 46.7
46.8 62.9
63.0 74.7
74.8 82.9
83.0 93.5
93.6 123.9
124.0 137.0
137.1 165.9
166.0 187.0
187.1 246.9
247.0 328.9
329.0 360.0
360.1 400.0
800 Ampere Contactor
200.0 250.0
250.1 330.0
330.1 499.0
500.0 650.1
650.1 720.0
Specific motor acceleration time and locked rotor current must be reviewed
to ensure fuse 24R fuse has sufficient capacity for start cycle.
EATON CORPORATION Cutler-Hammer Chiller Starter (AMPGARD) Technical Data TD02003003E
CONTINUOUS
AND BREAK
CURRENT AMPERES
600
1200
1200
1200
FUSE RATING CT RATIO
70-2R 25:5
70-2R 50:5
100-3R 50:5
100-3R 75:5
130-4R 75:5
150-5R 100:5
170-6R 100:5
170-6R 150:5
200-9R 150:5
200-9R 200:5
230-12R 200:5
230-12R 300:5
390-18R 300:5
450-24R 400:5
450-24R 600:5
450-24R 600:5
450-24R 300:5
450-24R 400:5
650-36R 600:5
800-44R 800:5
800-44R 1000:5
SHORT-TIME
FAULT CLOSE (2 SECONDS)
(UNFUSED) KA CURRENT KA
40 25
61 38
61 38
61 38
FUSED
INTERRUPTING RATING
(KA SYMMETRICAL)
50
40
31.5
N/A
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