Datasheet

Specifications are subject to change without notice (28.11.2018) 9

RAM..G

Co-ordination type 1 (UL508)

Part No. Prospective short Max. fuse size [A] Class/ Model Voltage [VAC]

circuit current [kArms]

RAM1..25.. 65 30 J or CC 600

RAM1..50.., 51.. 65 30 J 600

20 HSJ20 (Mersen)* 600

RAM1..100.. 65 80 J 600

60 HSJ60 (Mersen)* 600

RAM1..125.. 65 125 J 600

60 HSJ60 (Mersen)* 600

Short Circuit Protection

Protection Co-ordination, Type 1 vs. Type 2:

Type 1 protection implies that after a short circuit, the device under test will no longer be in a functioning state. In type 2

co-ordination the device under test will still be functional after the short circuit. In both cases, however, the short circuit has to

be interrupted. The fuse between enclosure and supply shall not open. The door or cover of the enclosure shall not be blown

open. There shall be no damage to conductors of terminals and the conductors shall not separate from terminals. Therese

shall be no breakage or cracking of insulating bases to the extent that the integrity of the mounting of live parts is impaired.

Discharge of parts or any risk of fire shall not occur.

The product variants listed in the table hereunder are suitable for use on a circuit capable of delivering not more than 65,000A

rms Symmetrical Amperes, 600Volts maximum when protected by fuses. Tests at 65,000A were performed with Class J, fast

acting: please refer to the table below for maximum allowed ampere rating of the fuse. Use fuses only.

Co-ordination type 2 (IEC/EN60947-4-3)

Part No. Prospective short Max. fuse Brand Model Size

circuit current [kArms] size [A]

RAM1.23..25.. 10 25 Mersen* 6.9gRB 10-25 10.3 x 38

RAM1.60..25.. 10 20 Mersen* 6.9gRB 10-20 10.3 x 38

RAM1.23..50.., 51.. 10 50 Mersen* 6.9zz CP gRC 14x51/50 14 x 51

RAM1.60..50.., 51.. 10 50 Mersen* 6.9zz CP gRC 22x58/50 22 x 58

RAM1.60.100.. 10 80 Mersen* 6.9zz CP gRC 22x58/80 22 x 58

RAM1.60.125.. 10 125 Mersen* 6.921 CP URGD 27x60/125 27 x 60

zz = 00, without fuse trip indication

zz = 21, with fuse trip indication

* formerly Ferraz Shawmut