Full Product Manual

V2-T1-114 Volume 2—Commercial Distribution CA08100003E—April 2016 www.eaton.com
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1.2
Switching Devices
Enclosed Circuit Breakers
Industrial Circuit Breaker Selection, continued
Notes
1
N.I.T.U. is non-interchangeable trip unit and I.T.U. is interchangeable trip unit.
2
Two-pole circuit breaker, or two poles of three-pole circuit breaker at 250 Vdc.
3
HLD: NEMA 1 enclosed: 240 Vac = 100 kA, 480 Vac = 65 kA, 600 Vac = 35 kA, 250 Vdc = 20 kA, 500 Vdc = 25 kA.
NEMA 3R enclosed: 240 Vac = 65 kA, 480 Vac = 50 kA, 600 Vac = 25 kA, 250 Vdc = 20 kA, 500 Vdc = 25 kA.
4
HMDL and HND: NEMA 1 and 3R enclosed: 240 Vac = 100 kA, 480 Vac = 65 kA, 600 Vac = 35 kA, 250 Vdc = 30 kA, 500 Vdc = 30 kA.
Circuit
Breaker
Type
Continuous
Ampere
Rating
at 40°C
Number
of
Poles Vac Vdc
Type of
Trip
1
Federal
Spec.
W-C-375b
UL Listed Interrupting Rating rms Symmetrical Amperes
Vac Ratings Vdc Ratings
2
120 120/240 240 277 480 600 125 250 125/250
L-Frame
LDB 300–600 2, 3 600 250 N.I.T.U. 23a — — 65,000 — 35,000 25,000 — 22,000 —
LD 300–600 2, 3, 4 600 250 I.T.U. 23a — — 65,000 — 35,000 25,000 — 22,000 —
HLD
3
300–600 2, 3, 4 600 250 I.T.U. 23a — — 100,000 — 65,000 35,000 — 25,000 —
M-Frame
MDL 300–800 2, 3 600 250 I.T.U. 23a — — 65,000 — 50,000 25,000 — 22,000 —
HMDL
4
300–800 2, 3 600 250 I.T.U. 23a — — 100,000 — 65,000 35,000 — 25,000 —
N-Frame
ND 600–1200 3, 4 600 — N.I.T.U. 23a — — 65,000 — 50,000 25,000 — —
HND
4
600–1200 3, 4 600 — N.I.T.U. 23a — — 100,000 — 65,000 35,000 — —
R-Frame
RD 800–2500 3, 4 600 — N.I.T.U. 24a — — 125,000 — 65,000 35,000 — — —