MERSEN.COM

MV 3

MEDIUM VOLTAGE

FUSES

FERRULE MOUNTED FUSES

Amp-Trap CS-3 Series: (Indoors or outdoors in a

weatherproof enclosure)

A055F: 5.5kV – AC: 5E to 450E – 63kA I.R. Sym

A825X: 8.25kV – AC: 10E to 200E – 70kA I.R. Sym

A155F: 15.5kV – AC: 5E to 200E – 50 kA I.R. Sym

9F62 Series Type EJO-1: (Indoors and outdoors, to 80kA)

9F62: 5.5kV – AC: 25A to 450A – 50kA IR Sym

9F62: 8.3kV – AC: 20A to 250A – 50 kA IR Sym

9F62: 15.5kV – AC: 20A to 200A – 50 kA IR Sym

9F60 Series Type EJO-1: (Indoors and outdoors)

9F60: 2.75kV – AC: 1E to 200E – 50kA IR Sym

9F60: 5.5kV – AC: 0.5E to 200E – 50kA IR Sym

9F60: 8.25kV – AC: 0.5E to 200E – 50kA IR Sym

9F60: 15.5kV – AC: 0.5E to 100E – 50kA to 120kA IR Sym

9F60: 25.8kV – AC: 0.5E to 100E – 25kA to 35kA IR Sym

9F60: 38kV – AC: 1E to 80E – 13kA to 26kA IR Sym

9F60 Series Type EJ-1: (Indoors or outdoors in a

weatherproof enclosure)

9F60: 2.75kV – AC: 1E to 200E – 47kA to 52kA IR Sym

9F60: 5.5kV – AC: 0.5E to 25E – 63kA IR Sym

9F60: 15.5kV – AC: 2E to 175E – 31kA to 82kA IR Sym

9F60: 25.8kV – AC: 0.5E to 2E – 35kA IR Sym

9F series

A = 3.31 inches (84mm)

9F series

B = 6.3 inches (160mm)

Amp-Trap series A = 3.63 inches (92 mm)

Amp-Trap series B = 6.63 inches (169 mm)

Transformer Protection

Amp-Trap® CS-3 Series and 9F60/9F62 Series

DEFINITIONS:

General Purpose Current-Limiting Fuses (Per IEEE

Std C37.41-2016):

A general purpose current-limiting fuse is one that

is capable of interrupting all currents, from its rated

maximum interrupting current down to a low value

equal to the current that causes melting of the

fuse elements in one hour or more, under specified

conditions.

E-Rating: E-Rated fuses operate as follows

(per IEEE C37.42-2016):

• 100E or less – must melt in 300 seconds (5 mins.)

at 200 to 240% of E (ampere) rating.

• Over 100E – must melt in 600 seconds (10 mins.)

at 220 to 264% of E (ampere) rating.

• Example: A 100E fuse must melt in 300 seconds

with an applied current of 200

to 240 amperes.

Power Distribution Fuses:

Defines fuses designed prior to the time where the

ANSI standards defined the term “General Purpose”

and do not meet all of the general purpose

definition. These fuses are capable of interrupting

all currents above 2.2 to 3 times the fuse’s rated

current up to its maximum interrupting rating.